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Contents
- The climate of Kos
- The Best Time to Visit Kos
- The Worst Time to Visit Kos
- Spring Weather in Kos
- Summer Weather in Kos
- Autumn Weather in Kos
- Winter Weather in Kos
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Clear waters of the Kos Town Harbour, Greece
The climate of Kos
Kos, Greece claims its place within the Köppen Climate Classification as a bearer of a Mediterranean climate, possessing hot summers known as the Csa type. This Aegean Sea island features relatively mild winters and scorching, sun-filled summer months.
Both temperature and rainfall patterns vary notably throughout the year. Monthly average temperatures range from 11.1°C (52°F) in January to a peak of 28.5°C (83.3°F) in August. These patterns illustrate a clear distinction between the balmy summer months and the cooler winter period. Rainfall follows an opposite trend, with the highest precipitation levels reaching 81mm (3.19") in January, and drying up to a minimal 1mm (0.04") during the summer months of July and August.
Distinct weather conditions to be noted include dry, sunny summers with very low rainfall, and winters that while not being extremely cold, have higher levels of precipitation and considerably less sunshine. Broad daylight also shows a robust annual variation, reaching its zenith in June with around 14.7 hours and making a dip to its lowest values in December with about 9.7 hours.
Both temperature and rainfall patterns vary notably throughout the year. Monthly average temperatures range from 11.1°C (52°F) in January to a peak of 28.5°C (83.3°F) in August. These patterns illustrate a clear distinction between the balmy summer months and the cooler winter period. Rainfall follows an opposite trend, with the highest precipitation levels reaching 81mm (3.19") in January, and drying up to a minimal 1mm (0.04") during the summer months of July and August.
Distinct weather conditions to be noted include dry, sunny summers with very low rainfall, and winters that while not being extremely cold, have higher levels of precipitation and considerably less sunshine. Broad daylight also shows a robust annual variation, reaching its zenith in June with around 14.7 hours and making a dip to its lowest values in December with about 9.7 hours.
The Best Time to Visit Kos
Taking into consideration all climatic factors, the most favorable period to visit Kos falls between June and August. During this time, the area basks in high temperatures ranging from 25.2°C (77.4°F) to 28.5°C (83.3°F) and enjoys an abundance of sunlight with up to 14.7 hours of daylight. Rainfall is also at its lowest, dropping to its annual lows of 1mm (0.04"), providing perfect conditions for outdoor activities and beach visits.
These months also witness the most sunshine hours per day, averaging between 10.3 hours to 12.2 hours. At this time of the year, sea temperatures are also at their warmest, swinging from 22.6°C (72.7°F) in June to a peak of 25.3°C (77.5°F) in August, creating ideal conditions for beach lovers and water sport enthusiasts.
These months also witness the most sunshine hours per day, averaging between 10.3 hours to 12.2 hours. At this time of the year, sea temperatures are also at their warmest, swinging from 22.6°C (72.7°F) in June to a peak of 25.3°C (77.5°F) in August, creating ideal conditions for beach lovers and water sport enthusiasts.
The Worst Time to Visit Kos
The period encompassing December to February typically poses the least optimal time to visit Kos. In this period, temperatures slide to their lowest values with average lows of 11.1°C (52°F) to 13.2°C (55.8°F), and high temperatures ranging from 13.8°C (56.8°F) to 15.5°C (59.9°F). During these months rainfall signals its peak, surging to its annual highs of 78mm (3.07") to 81mm (3.19"), and humidity levels remain relatively high oscillating around 67% to 70%.
Further, the daylight hours also decrease to their lowest, shrinking to around 9.7 to 10 hours, and the sea temperature cooled down to 17°C (62.6°F) to 18.6°C (65.5°F), not quite suitable for those intending to engage in water-related activities.
Further, the daylight hours also decrease to their lowest, shrinking to around 9.7 to 10 hours, and the sea temperature cooled down to 17°C (62.6°F) to 18.6°C (65.5°F), not quite suitable for those intending to engage in water-related activities.
Spring Weather in Kos
As winter melts away, spring manifests itself between March and May. During this period, temperatures begin to rise, starting at 15.8°C (60.4°F) in March and gracefully climbing to 21.6°C (70.9°F) in May. Daylight hours also experience a substantial increment, inching from 12 hours to 14.1 hours as the season progresses.
Rainfall, on the other hand, gradually declines from 32mm (1.26") in March to merely 11mm (0.43") at the onset of May. Simultaneously, the hours of sunshine experience an upsurge, moving from 8.6 hours in March to 10.3 hours in May, offering more opportunities for tourism activities.
Rainfall, on the other hand, gradually declines from 32mm (1.26") in March to merely 11mm (0.43") at the onset of May. Simultaneously, the hours of sunshine experience an upsurge, moving from 8.6 hours in March to 10.3 hours in May, offering more opportunities for tourism activities.
Summer Weather in Kos
Summers in Kos, from June to August, are the embodiment of a Mediterranean climate, displaying sunshine-filled days coupled with balmy temperatures. High temperatures average between 25.2°C (77.4°F) in June and peak at 28.5°C (83.3°F) in August, while average low temperatures also mark a steady rise from 22.1°C (71.8°F) to 25°C (77°F).
With the least cloud coverage and low rainfall, the visibility remains excellent at around 10km (6.2mi) throughout the summer. Kos also experiences the highest UV index during these months, increasing the need for sun protection measures.
With the least cloud coverage and low rainfall, the visibility remains excellent at around 10km (6.2mi) throughout the summer. Kos also experiences the highest UV index during these months, increasing the need for sun protection measures.
Autumn Weather in Kos
Autumn, spanning the months of September to November, witnesses a gradual reduction in temperatures, from a high of 25.8°C (78.4°F) in September to 19.2°C (66.6°F) in November. Rainfall levels begin to hike from 8mm (0.31") in September to 50mm (1.97") by November. Also, daylight hours start sloping from 12.4 hours in September to a shorter span of 10.2 hours in November.
Though humidity takes an upward trajectory, the sea temperature remains relatively comfortable, gradually declining from 24.9°C (76.8°F) in September to 20°C (68°F) by November.
Though humidity takes an upward trajectory, the sea temperature remains relatively comfortable, gradually declining from 24.9°C (76.8°F) in September to 20°C (68°F) by November.
Winter Weather in Kos
Winter in Kos commences in December and lasts through February, bringing with it cooler temperatures, increased rainfall, and reduced sunlight. The mean high temperature sees a descent from 15.5°C (59.9°F) in December to 13.8°C (56.8°F) in January, whereas the average low temperature moves within the range of 11.1°C (52°F) to 13.2°C (55.8°F).
Rainfall peaks during these months, with December and January witnessing the heaviest showers, with precipitation amounting to 78mm (3.07") and 81mm (3.19"), respectively. Despite the shorter daylight hours in winter, falling to about 9.7 hours in December, and slightly rising to 10 hours in February, the visibility in Kos is excellent, maintaining a constant 10km (6.2mi) throughout the season.
Rainfall peaks during these months, with December and January witnessing the heaviest showers, with precipitation amounting to 78mm (3.07") and 81mm (3.19"), respectively. Despite the shorter daylight hours in winter, falling to about 9.7 hours in December, and slightly rising to 10 hours in February, the visibility in Kos is excellent, maintaining a constant 10km (6.2mi) throughout the season.
Weather in January
Kos, Greece, ushers in the New Year with moderate temperatures and rainfall. January experiences a significant amount of precipitation with 81mm (3.19") falling over approximately 13.5 days. The new year seems to prefer a milder demeanor with cooler temperatures on the island. Weather in January »
Weather in February
Entering February, Kos experiences a notable decrease in rainfall from the preceding month and a slight increase in temperature. The shortest month of the year records a meager 39mm (1.54") of rainfall, indicative of the transition towards drier months. Weather in February »
Weather in March
With the arrival of spring, Kos starts to feel warmer, teasing the coming summer months. March proves to be an attractive month with the temperature high hitting 15.8°C (60.4°F) and a further reduction of rainfall to 32mm (1.26"). Weather in March »
Weather in April
April in Kos manifests a clear shift towards a warmer climate bringing forth the flavors of Greek spring. A significant feature of April weather is the reduced rainfall to merely 18mm (0.71"), ushering in a substantial contrast from the initial months of the year. Weather in April »
Weather in May
May signifies the unofficial start of summer in Kos, marked by pleasant warmth and augmented by a welcoming sea temperature. The recorded rainfall reaches a new low for the year, with a paltry 11mm (0.43"). The weather features a noticeable change from the breezier April to the milder May, marking a delightful transition. Weather in May »
Weather in June
June in Kos opens the door to idyllic summer days, filled with sunlight and minimal rains. The month further dries out from May, reaching the year’s record low at just 5mm (0.2") of rainfall. The leap from May to June emboldens the summer narrative, offering a welcoming prelude to the holiday season. Weather in June »
Weather in July
July signifies the heart of summer in Kos and a delight for sun worshippers. July witnesses the highest sea temperature, reaching 24.3°C (75.7°F), perfect for swimming and water activities. The climatic transformation from June to July additionally emphasizes the sun-filled weather narrative. Weather in July »
Weather in August
August stands as a testament to the glorious Greek summer in Kos, reveling in warmth and prolonged daylight. August mirrors July in terms of sea temperature, sustaining a comfortable layer of warmth at 25.3°C (77.5°F). The weather pattern from July persists, bestowing upon the island the glorious combination of sun, sea, and clear blue skies. Weather in August »
Weather in September
September in Kos, while still warmly clinging to summer hues, initiates the slow descent towards autumn. A defining feature of September's weather is the increase in rainfall to 8mm (0.31"), transitioning from the dry August. Weather in September »
Weather in October
October in Kos highlights the proceeding of autumn, accompanied by a moderated climate and rainfall. This month witnesses a surged precipitation to 27mm (1.06"), signifying the end of the dry season. The transition from the warm September to the milder October correlates with nature’s rhythm. Weather in October »
Weather in November
November signifies Kos embracing the pleasant chills of autumn, preparing itself for the impending winter. A distinct shift in weather becomes observable with rainfall rising to 50mm (1.97"). Transitioning from October’s milder weather, November bears the brunt of additional showers. Weather in November »
Weather in December
December in Kos marks the arrival of winter, adorning the island in a contrasting yet mesmerizing attire. Drawing attention to the shift in seasons, rainfall spikes to 78mm (3.07") in December. The weather pattern is noticeably colder compared to November, accentuating the winter feel. Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Kos?
The coldest time of the year in Kos is January, with temperatures averaging a high of 13.8°C (56.8°F) and a low of 11.1°C (52°F).
What is the wettest month in Kos?
January is the month with the most rainfall. Rain falls for 13.5 days and accumulates 81mm (3.19") of precipitation.
How many days does it rain in Kos?
Throughout the year, in Kos, Greece, there are 87.4 rainfall days, and 351mm (13.82") of precipitation is accumulated.
What are the months with the lowest UV index in Kos?
January, February and December, with an average maximum UV index of 4, are months with the lowest UV index.
What are the most humid months in Kos?
February, April and May, with an average relative humidity of 70%, are most humid months in Kos.
What is the month with the coldest sea water in Kos?
With an average sea temperature of 16.9°C (62.4°F), March is the month with the coldest seawater in Kos.
When are the longest days in Kos?
June has the longest days of the year in Kos, with an average of 14h and 36min of daylight.
What month has the most sunshine in Kos?
With an average of 12.2h of sunshine, June has the most sunshine of the year in Kos.
What is the least humid month in Kos?
July and October, with an average relative humidity of 65%, are the least humid months in Kos.
What is the driest month in Kos?
July and August are months with the least rain when the rain falls for 1.1 days and typically aggregates up to 1mm (0.04") of rain.
What is the month with the highest UV index in Kos?
The months with the highest UV index are July and August, with an average maximum UV index of 7.
What is the hottest time of year in Kos?
The warmest period tends to be August, when average temperatures fluctuate between a high of 28.5°C (83.3°F) and a low of 25°C (77°F).
What month is the sea warmest in Kos?
August is the month with the warmest seawater in Kos, with an average sea temperature of 25.3°C (77.5°F).
When is Daylight Saving Time (DST) in Kos?
On Sunday, 27. October 2024, at 04:00, Daylight Saving Time ends, and the time zone changes from EEST to EET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 03:00, and the time zone reverts from EET to EEST.
What is the month with the shortest days in Kos?
The month with the shortest days is December, with an average of 9h and 42min of daylight.
What is the month with the least sunshine in Kos?
December has the least sunshine of the year in Kos, Greece, with an average of 6.6h of sunshine.
Average temperature
Kos, Greece
The warmest month (with the highest average high temperature) is August (28.5°C).
The month with the lowest average high temperature is January (13.8°C).
The month with the highest average low temperature is August (25°C).
The coldest month (with the lowest average low temperature) is January (11.1°C).
Average pressure
Kos, Greece
- Average pressure in January:
1016.5mbar - Average pressure in February:
1015.3mbar - Average pressure in March:
1014.6mbar - Average pressure in April:
1013.3mbar - Average pressure in May:
1012.3mbar - Average pressure in June:
1010.2mbar
- Average pressure in July:
1007.6mbar - Average pressure in August:
1008.2mbar - Average pressure in September:
1011.9mbar - Average pressure in October:
1015.2mbar - Average pressure in November:
1017.2mbar - Average pressure in December:
1017.6mbar
The month with the highest atmospheric pressure is December (1017.6mbar).
The month with the lowest atmospheric pressure is July (1007.6mbar).
Average wind speed
Kos, Greece
- Average wind speed in January:
23.7km/h - Average wind speed in February:
22.9km/h - Average wind speed in March:
20.8km/h - Average wind speed in April:
17.6km/h - Average wind speed in May:
14.4km/h - Average wind speed in June:
15.9km/h
- Average wind speed in July:
19.8km/h - Average wind speed in August:
17.5km/h - Average wind speed in September:
17.6km/h - Average wind speed in October:
16.9km/h - Average wind speed in November:
18.7km/h - Average wind speed in December:
22.1km/h
The windiest month (with the highest average wind speed) is January (23.7km/h).
The calmest month (with the lowest average wind speed) is May (14.4km/h).
Average humidity
Kos, Greece
The months with the highest relative humidity are February, April and May (70%).
The months with the lowest relative humidity are July and October (65%).
Average rainfall
Kos, Greece
The wettest month (with the highest rainfall) is January (81mm).
The driest months (with the least rainfall) are July and August (1mm).
Average rainfall days
Kos, Greece
- Average rainfall days in January:
13.5 days - Average rainfall days in February:
12.6 days - Average rainfall days in March:
9.6 days - Average rainfall days in April:
8.2 days - Average rainfall days in May:
6.6 days - Average rainfall days in June:
3.3 days
- Average rainfall days in July:
1.1 days - Average rainfall days in August:
0.4 days - Average rainfall days in September:
3.4 days - Average rainfall days in October:
6.7 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
13.4 days
The month with the highest number of rainy days is January (13.5 days).
The month with the least rainy days is August (0.4 days).
Average sea temperature
Kos, Greece
The best month for swimming (with the highest average sea temperature) is August (25.3°C).
The coldest month (with the lowest average sea temperature) is March (16.9°C).
Average daylight / Average sunshine
Kos, Greece
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 3min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
7h and 4min - Average sunshine in February:
8h and 0min - Average sunshine in March:
8h and 4min - Average sunshine in April:
9h and 0min - Average sunshine in May:
10h and 2min - Average sunshine in June:
12h and 1min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 5min - Average sunshine in October:
9h and 3min - Average sunshine in November:
7h and 5min - Average sunshine in December:
6h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days
Kos, Greece
- Average sunshine days in January:
15.5 days - Average sunshine days in February:
14.1 days - Average sunshine days in March:
20.5 days - Average sunshine days in April:
20.8 days - Average sunshine days in May:
22.1 days - Average sunshine days in June:
24.4 days
- Average sunshine days in July:
29.8 days - Average sunshine days in August:
29.8 days - Average sunshine days in September:
25.5 days - Average sunshine days in October:
23.5 days - Average sunshine days in November:
20.2 days - Average sunshine days in December:
16.7 days
The months with the most sunshine days are July and August (29.8 days).
The month with the least sunshine days is February (14.1 days).
Average UV index
Kos, Greece
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 4).
Average cloud cover
Kos, Greece
The month with the most cloud cover is January (Cloud cover 37).
The months with the least cloud cover are July and August (Cloud cover 3).
Average visibility
Kos, Greece
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Kos, Greece
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