Climate and monthly weather forecastPortmore, Jamaica
Climate and monthly weather forecast
The climate of Portmore
Portmore, located in Jamaica, experiences the Aw Köppen climate classification, or more commonly known, the Tropical wet and dry or savanna climate. The geographic position of Portmore, near the coast, significantly influences its climate, resulting in a relatively high humidity level ranging from 78% to 82% throughout the year.The year-round temperature in Portmore displays a modest fluctuation. The mercury hovers between a fair 21.6°C (70.9°F) to a balmy 30.3°C (86.5°F). The warmest month typifies an average high temperature of 30.3°C (86.5°F), while the coolest suggests an average low of 21.6°C (70.9°F). Subtle changes in sea temperature are observed from 26.9°C (80.4°F) to reaching a peak at 29.5°C (85.1°F).
Seasonal rainfall exhibits some variation with the lowest average rainfall measurements of 44mm (1.73") and peaking near 184mm (7.24"). Consistently, the city observes rainfall with an average of 22.1 to 28.7 rainfall days per month. Coupled with high humidity, Portmore's weather may often feel more heated than actual temperatures suggest.
A noticeable variance exists in daylight hours, narrowing from 11.1 hours to extending up to 13.2 hours. Further study of sunshine hours shows a slight variability from 6.5 hours extending to approximately 10.8 hours.
The best time to visit Portmore
Ideal visiting conditions in Portmore might be during the months when the weather is at its most pleasant. Taking temperature, rainfall and sunshine into account, the months from December to March are deemed as the suitable duration for a visit. During this period, the temperature varies between a tolerable 21.7°C (71.1°F) and a moderate 28.7°C (83.7°F).Moreover, these months witness comparatively minimal rain, fluctuating between 52mm (2.05") to 78mm (3.07"), providing visitors ample opportunities to explore the city without hindrance. Sunshine hours hover around 6.8 to 10.3, maximizing daylight for sight-seeing.
The worst time to visit Portmore
The less favourable time for tourism in Portmore would be the months when the city experiences its highest rainfall. Typically, the period from May to October is marked by increased precipitation levels from 122mm (4.8") to 184mm (7.24"), with approximately 26 to 28 rainy days per month. This could potentially hamper outdoor activities and sightseeing plans.Furthermore, during these months, the temperature soars up between a hot 23.2°C (73.8°F) to a sizzling 30.3°C (86.5°F), a combination with high humidity, can make it seem stifling, particularly for those unaccustomed to tropical climates.
Spring weather in Portmore
In Portmore, spring extends from March through May. The onset of spring sees temperatures hover between 21.7°C (71.1°F) to 28.7°C (83.7°F). March is relatively drier with rainfall amounting to 59mm (2.32"), which gradually increases to a substantial 154mm (6.06") by May. Sunshine hours reduce slightly from 8.6 to 10.1. The sea temperature shifts upwards from 27.3°C (81.1°F) to 28.1°C (82.6°F), offering delightful opportunities for beach lovers.Summer weather in Portmore
Summer in Portmore spans from June to August. Temperatures throughout these months remain consistent, with minimums around 24°C (75.2°F) to 24.3°C (75.7°F) and maximums from 29.3°C (84.7°F) to 30.3°C (86.5°F). Despite the high heat, sea temperatures rise to make for comfortable sea-bathing, peaking at 29.4°C (84.9°F) in August.The summer season also brings higher rainfall, fluctuating from 120mm (4.72") to 131mm (5.16") monthly. Consequently, sunbathing days may be limited due to increased cloud cover and an average of 26 to 27.8 rainfall days.
Autumn weather in Portmore
In Portmore, the autumn months are September through November. In this period, temperatures range between 24.1°C (75.4°F) to 28.6°C (83.5°F). Average rainfall peaks to 184mm (7.24") in October before reducing to 112mm (4.41") in November. Despite the high humidity and rainfall, the sea temperature remains balmy around 28.9°C (84°F) to 29.5°C (85.1°F), thereby attracting the beach enthusiasts.Winter weather in Portmore
Winter in Portmore ensues from December through February. These months depict a decline in temperature, ranging from 21.6°C (70.9°F) to 27.3°C (81.1°F). Rainfall exhibits a marked decrease, from 76mm (2.99") in December to 44mm (1.73") in February, making these months preferable for outdoor ventures. The sea temperature fluctuates between 26.9°C (80.4°F) and 27.1°C (80.8°F), implying slightly cooler but still pleasant beach outings. Besides, sunshine hours are lower, varying from 6.5 hours to 8.5 hours per day, offering a mild winter experience for visitors.Weather in January
Weather in Portmore, Jamaica starts the year on a warm and humid note in January. The temperature does not fluctuate characteristically between January and February, it is mostly stable. Visitors can expect moderately high temperatures and humidity, with an occasional cool breeze flowing across the city. Weather in January »Weather in February
The weather in February continues the consistent weather pattern observed in January, with little variation. Temperatures are moderately warm, bringing an end to the cooler winter weather. The city experiences less rainfall with approximately 44mm (1.73") reported. Weather in February »Weather in March
As March arrives, the city of Portmore, Jamaica experiences a slight uptick in temperatures as well as rainfall from February, signaling the impending onset of spring. Outdoor activities are particularly enjoyable due to increased daylight hours, before the intense summer heat sets in. Weather in March »Weather in April
April in Portmore, Jamaica sees a considerable increase in temperatures, however, the sea temperature remains relatively stable, making it a great time for beach activities. Despite seeing longer daylight hours, the city experiences an increased quantity of rainfall of approximately 78mm (3.07"), possibly resulting in the wet nature of the month. Weather in April »Weather in May
In May, Portmore, Jamaica witnesses a significant rise in the quantity of rainfall, reaching as much as 154mm (6.06"), rendering it the month with the highest rainfall so far in the year. It marks the transition from spring to summer, with temperatures rising steadily, hinting at the onset of the approaching warmer months. Weather in May »Weather in June
June is characterized by a further elevation in Portmore's temperatures, making it one of the hottest months of the year. The city experiences its peak temperature, however, the gush of wind with speed hovering around 12.8km/h (8mph) offers a refreshing reprieve. Weather in June »Weather in July
July presents Portmore, Jamaica at its warmest, with temperatures soaring to the highest point all year. The city also continues to receive high rainfall. The steady wind helps to balance the high temperature and humidity, maintaining a comfortable atmosphere. Weather in July »Weather in August
In August, Portmore witnesses a slight downturn in temperature; however, it still remains significantly warm. The trend of substantial rainfall continues from July, making it a wet month. It is a time of noticeable humidity, complimented by the consistent wind across the city which lightens the atmosphere. Weather in August »Weather in September
September ushers in a minor drop in temperature in Portmore, Jamaica, preparing the city for the approaching autumn season. Comparative to August, it experiences an increase in rainfall of approximately 154mm (6.06"), making the city significantly wet. Weather in September »Weather in October
In October, the city of Portmore gradually transitions from hot summer to cooler autumn. Despite the slight drop in temperatures, they continue to be significantly warm. The month is known for even higher rainfall, reaching approximately 184mm (7.24"), making it the wettest month of the year. Weather in October »Weather in November
November portrays a significant shift in the city's temperature and rainfall. Though temperatures manage to remain warm, the city experiences a reduced rainfall of approximately 112mm (4.41"), marking the nearing end of the heavy rains. Weather in November »Weather in December
December brings a subtle onset of winter in Portmore, Jamaica, with noticeable drops in temperature. Despite the reduced daytime temperatures, they remain warm enough to enjoy outdoor activities comfortably. The rainfall also sees a considerable reduction to approximately 76mm (2.99"), marking the end of the heavy rainfall season. Weather in December »Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Portmore experiences the lowest of its temperatures in January and February, when the average high-temperatures rise to 27.3°C (81.1°F).
In Portmore, during the entire year, the rain falls for 310.9 days and collects up to 1286mm (50.63") of precipitation.
The months with the lowest UV index are January through May, November and December, with an average maximum UV index of 6.
The month with the least rainfall in Portmore, Jamaica, is February, when the rain falls for 22.1 days and typically collects 44mm (1.73") of precipitation.
The month with the coldest seawater in Portmore, Jamaica, is February, with an average sea temperature of 26.9°C (80.4°F).
March is the least humid month in Portmore, with an average relative humidity of 78%.
With an average of 13h and 12min of daylight, June has the longest days of the year.
The months with the highest UV index are June through October, with an average maximum UV index of 7.
Portmore's warmest weather arrives in August, when temperatures average a high of 30.3°C (86.5°F) and a low of 24.2°C (75.6°F).
The months with the most sunshine are August and September, with an average of 10.8h of sunshine.
The month with the warmest seawater in Portmore is September, with an average sea temperature of 29.5°C (85.1°F).
With an average relative humidity of 82%, October is the most humid month in Portmore, Jamaica.
October is the month with the most rainfall. Rain falls for 28.7 days and accumulates 184mm (7.24") of precipitation.
With an average of 11h and 6min of daylight, December has the shortest days of the year in Portmore.
Portmore, Jamaica, does not utilize Daylight Saving Time (DST). EST timezone is used throughout the entire year.
December has the least sunshine of the year in Portmore, Jamaica, with an average of 6.5h of sunshine.
Average temperature
Portmore, Jamaica
The warmest month (with the highest average high temperature) is August (30.3°C).
The months with the lowest average high temperature are January and February (27.3°C).
The month with the highest average low temperature is July (24.3°C).
The coldest month (with the lowest average low temperature) is February (21.6°C).
Average pressure
Portmore, Jamaica
- Average pressure in January:
1015.5mbar - Average pressure in February:
1015.4mbar - Average pressure in March:
1015.2mbar - Average pressure in April:
1014.2mbar - Average pressure in May:
1013.6mbar - Average pressure in June:
1014.1mbar
- Average pressure in July:
1014.6mbar - Average pressure in August:
1013.4mbar - Average pressure in September:
1012.3mbar - Average pressure in October:
1011.5mbar - Average pressure in November:
1012.4mbar - Average pressure in December:
1014.4mbar
The month with the highest atmospheric pressure is January (1015.5mbar).
The month with the lowest atmospheric pressure is October (1011.5mbar).
Average wind speed
Portmore, Jamaica
- Average wind speed in January:
10.5km/h - Average wind speed in February:
10.3km/h - Average wind speed in March:
9.7km/h - Average wind speed in April:
9.8km/h - Average wind speed in May:
10.8km/h - Average wind speed in June:
12.8km/h
- Average wind speed in July:
12.1km/h - Average wind speed in August:
10.8km/h - Average wind speed in September:
8.9km/h - Average wind speed in October:
8.8km/h - Average wind speed in November:
8.6km/h - Average wind speed in December:
10km/h
The windiest month (with the highest average wind speed) is June (12.8km/h).
The calmest month (with the lowest average wind speed) is November (8.6km/h).
Average humidity
Portmore, Jamaica
The month with the highest relative humidity is October (82%).
The month with the lowest relative humidity is March (78%).
Average rainfall
Portmore, Jamaica
- Average rainfall in January:
52mm - Average rainfall in February:
44mm - Average rainfall in March:
59mm - Average rainfall in April:
78mm - Average rainfall in May:
154mm - Average rainfall in June:
122mm
- Average rainfall in July:
120mm - Average rainfall in August:
131mm - Average rainfall in September:
154mm - Average rainfall in October:
184mm - Average rainfall in November:
112mm - Average rainfall in December:
76mm
The wettest month (with the highest rainfall) is October (184mm).
The driest month (with the least rainfall) is February (44mm).
Average rainfall days
Portmore, Jamaica
- Average rainfall days in January:
23.9 days - Average rainfall days in February:
22.1 days - Average rainfall days in March:
25.4 days - Average rainfall days in April:
24.4 days - Average rainfall days in May:
27.5 days - Average rainfall days in June:
26.1 days
- Average rainfall days in July:
26.2 days - Average rainfall days in August:
27.8 days - Average rainfall days in September:
27.1 days - Average rainfall days in October:
28.7 days - Average rainfall days in November:
26 days - Average rainfall days in December:
25.7 days
The month with the highest number of rainy days is October (28.7 days).
The month with the least rainy days is February (22.1 days).
Average sea temperature
Portmore, Jamaica
The best month for swimming (with the highest average sea temperature) is September (29.5°C).
The coldest month (with the lowest average sea temperature) is February (26.9°C).
Average daylight / Average sunshine
Portmore, Jamaica
- Average daylight in January:
11h and 12min - Average daylight in February:
11h and 36min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 36min - Average daylight in May:
13h and 0min - Average daylight in June:
13h and 12min
- Average daylight in July:
13h and 6min - Average daylight in August:
12h and 42min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 42min - Average daylight in November:
11h and 18min - Average daylight in December:
11h and 6min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).
- Average sunshine in January:
6h and 48min - Average sunshine in February:
8h and 30min - Average sunshine in March:
8h and 36min - Average sunshine in April:
10h and 18min - Average sunshine in May:
10h and 6min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 48min - Average sunshine in September:
10h and 48min - Average sunshine in October:
7h and 12min - Average sunshine in November:
6h and 36min - Average sunshine in December:
6h and 30min
The months with the most sunshine are August and September (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days
Portmore, Jamaica
- Average sunshine days in January:
3.4 days - Average sunshine days in February:
3.1 days - Average sunshine days in March:
2.7 days - Average sunshine days in April:
2.4 days - Average sunshine days in May:
1.6 days - Average sunshine days in June:
1.1 days
- Average sunshine days in July:
1.1 days - Average sunshine days in August:
0.3 days - Average sunshine days in September:
0.8 days - Average sunshine days in October:
0.8 days - Average sunshine days in November:
1.7 days - Average sunshine days in December:
1.8 days
The month with the most sunshine days is January (3.4 days).
The month with the least sunshine days is August (0.3 days).
Average UV index
Portmore, Jamaica
The months with the highest UV index are June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 6).
Average cloud cover
Portmore, Jamaica
The month with the most cloud cover is June (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility
Portmore, Jamaica
The months with the highest visibility are January, February, March, April, June, July, November and December (10km).
The months with the lowest visibility are May, August, September and October (9km).
