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Contents
- The climate of Sasebo
- The best time to visit Sasebo
- The worst time to visit Sasebo
- Spring weather in Sasebo
- Summer weather in Sasebo
- Autumn weather in Sasebo
- Winter weather in Sasebo
- 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 snowfall
- Average snowfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
The climate of Sasebo
Sasebo, Japan, is based in the Humid Subtropical zone, identified by the Köppen climate classification as Cfa, which is characterized by no dry season. This dominant climate type has substantial impacts on the weather patterns in the region. Over the course of a year, the temperature ranges from 5.4°C (41.7°F) to 29.6°C (85.3°F). January and February are the coldest months with temperatures dipping to 5.4°C (41.7°F) and 6.2°C (43.2°F) respectively, while July and August emerge as the hottest months, where temperature can reach 27.6°C (81.7°F) to 29.6°C (85.3°F).
Relating to precipitation details, rainfall varies from a lower value of 38mm (1.5") in January to a maximum of 192mm (7.56") in July. The number of rainy days correlates with these numbers, surging to 19.7 in July from 14.5 in January. It is worth noting that Sasebo does experience snowfall, albeit limited to the cooler months of January, February, and December, with values around 6mm (0.24") and 4mm (0.16").
An analysis of humidity delineates a tangible trend, with a related increase in the summer months, peaking at 87% in July. Annually, sunshine hours range from 4.5 hours per day in winter months to a high of 10.5 hours per day in August. Likewise, daylight hours vary, reaching a maximum of 14.3 hours in June.
Wind speeds in the region hover around 16.7km/h (10.4mph) at the start and end of the year, decreasing slightly to 10.6km/h (6.6mph) in June, the month showcasing the least wind activity. Sea temperatures display a marked variation throughout the year with a maximum of 27.7°C (81.9°F) in August and a minimum of 14.7°C (58.5°F) in March.
Relating to precipitation details, rainfall varies from a lower value of 38mm (1.5") in January to a maximum of 192mm (7.56") in July. The number of rainy days correlates with these numbers, surging to 19.7 in July from 14.5 in January. It is worth noting that Sasebo does experience snowfall, albeit limited to the cooler months of January, February, and December, with values around 6mm (0.24") and 4mm (0.16").
An analysis of humidity delineates a tangible trend, with a related increase in the summer months, peaking at 87% in July. Annually, sunshine hours range from 4.5 hours per day in winter months to a high of 10.5 hours per day in August. Likewise, daylight hours vary, reaching a maximum of 14.3 hours in June.
Wind speeds in the region hover around 16.7km/h (10.4mph) at the start and end of the year, decreasing slightly to 10.6km/h (6.6mph) in June, the month showcasing the least wind activity. Sea temperatures display a marked variation throughout the year with a maximum of 27.7°C (81.9°F) in August and a minimum of 14.7°C (58.5°F) in March.
The best time to visit Sasebo
For travelers targeting milder temperatures, the months of October and November emerge as the ideal time to visit Sasebo. During this time, the average temperature falls between 17.3°C (63.1°F) and 26.4°C (79.5°F). Precipitation levels are substantially lower, approximately 40mm (1.57") to 67mm (2.64") respectively, and the region experiences more sunny days, specifically 17.8 in October. Sea temperatures fall within an inviting range of 21.6°C (70.9°F) to 24.1°C (75.4°F), adding to the appeal of this timeframe.
The worst time to visit Sasebo
Sasebo faces its harshest weather conditions between June and August. These months are characterized by high humidity levels, extending up to 87%. Furthermore, maximum rainfall of the year occurs in this period, increasing from 114mm (4.49") in June to an apex of 192mm (7.56") in July. Lastly, temperatures rise up to a high of 29.6°C (85.3°F) making it less comfortable for outdoor activities.
Spring weather in Sasebo
The onset of spring in Sasebo, spanning from March to May, is marked by warmer temperatures ranging from 13.5°C (56.3°F) to 21.6°C (70.9°F). Rainfall exhibits a gradual increase over these months, ranging from 48mm (1.89") to 59mm (2.32"). While humidity levels do present a slight upward trend, they remain below 80%, thereby maintaining overall comfort. The duration of daylight extends during this period, leading to longer days with an average sunshine of 7.1 to 9.1 hours per day.
Summer weather in Sasebo
The summer season in Sasebo spans from June to August. It is characterised by high temperatures reaching up to 29.6°C (85.3°F) in August. Concurrently, rainfall levels rise exponentially with July bearing witness to the maximum precipitation of the year, 192mm (7.56"). Sunshine duration slightly decreases, despite long daylight hours. Humidity levels peak this season, marking the summer months as the least comfortable.
Autumn weather in Sasebo
The autumn months usher in an observable shift in weather with temperatures cooling down to range from 26.4°C (79.5°F) to 16.9°C (62.4°F) from September to November. This period sees a marked drop in rainfall from a high of 67mm (2.64") in September to a more comfortable 40mm (1.57") in October. Humidity levels scale down as well, making it an agreeable time for outdoor activities.
Winter weather in Sasebo
Winter in Sasebo, stretching from December to February, is characterized by the coldest temperatures of the year, ranging from 5.4°C (41.7°F) to 10.6°C (51.1°F). Rainfall during this period fluctuates between 38mm (1.5") and 53mm (2.09"). Despite the chillier temperatures, sunlight hours are relatively consistent, close to 4.5 hours per day. Another unique element is the occurrence of snowfall, albeit minimal, adding a dash of white to Sasebo’s winter.
Weather in January
The start of the year in Sasebo, Japan, brings a chilly tone as the weather continues to feel the effects of winter. January experiences average low and high temperatures of 5.4°C (41.7°F) and 9.3°C (48.7°F) respectively. While frosty conditions are felt, the region also sees light snowfall during this month. Weather in January »
Weather in February
In February, Sasebo witnesses subtly milder weather compared to January. The month displays a minimal increase in temperatures, contributing to the slower transition into spring. Rainfall does increase slightly, accompanied by a reduction in snowfall, hinting at the changing seasons. Weather in February »
Weather in March
With March, the onset of spring in Sasebo becomes more significant. There’s a notable increase in average high temperature which goes up to 13.5°C (56.3°F) from 10.6°C (51.1°F) in the previous month, marking the shift towards warmer days. Weather in March »
Weather in April
April brings along a substantial enhancement in weather conditions in Sasebo city. Residents can start to enjoy warmer days as the harshness of winter starts to fade. The temperatures continue rising and the city experiences more sunny days than the previous months. Weather in April »
Weather in May
As May approaches, the climate in Sasebo takes a turn towards the warmer side with daily maximum temperature reaching up to 21.6°C (70.9°F). This is significantly warmer compared to the 17.3°C (63.1°F) recorded in April. Concurrently, rainfall also increases reflecting the typical spring weather. Weather in May »
Weather in June
June presents a drastic shift in Sasebo’s weather patterns as the city enters the summer season. Temperatures continue to rise, however, the drastic change comes in terms of rainfalls. The drastic increase in rainfall heralds the start of the rainy season. Weather in June »
Weather in July
July witnesses the peak of summer in Sasebo. The weather in this period sees the highest average daily temperature at 27.6°C (81.7°F) and the highest rainfall during the year at 192mm (7.56"). This makes the city hot and humid making hydration important for residents and visitors alike. Weather in July »
Weather in August
August continues to bring high summer temperatures in Sasebo with a high daily temperature going up to 29.6°C (85.3°F). Despite being the hottest month, it experiences a decrease in rainfall compared to July. The reduction in rain and sustaining high temperatures, make this month particularly warm. Weather in August »
Weather in September
September marks the start of autumn in Sasebo. It experiences a steady decrease in temperatures, contrasted by a sharp reduction in rainfall compared to August. The city sees pleasant weather during this period with shorter days and less intense sunlight. Weather in September »
Weather in October
October brings a definitive feel of autumn to Sasebo. Lower temperatures become a norm, making the environment cooler and pleasant. The city sees a drop in rainfall and the days get noticeably shorter. The combination of cool weather, decreasing humidity, and clear skies make October a perfect month for sightseeing. Weather in October »
Weather in November
November sees further cooling in Sasebo with temperatures dipping into the low teens. Rainfall in November sees a slight increase compared to October but overall, the weather stays pleasant and crisp. As days shorten, the city sees less sunshine, resulting in chillier days and nights. Weather in November »
Weather in December
As the year comes to a close, Sasebo experiences the onset of winter in December. Temperatures continue their downward trend from November. The city experiences more frequent rainfall, accompanied by sparse snowfall. Despite the gloomy weather, the holiday spirit and festive lighting across the city make December a memorable time to visit Sasebo. 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
What are the coldest months in Sasebo?
Sasebo's January weather, with an average high temperature of 9.3°C (48.7°F) and an average low temperature of 5.4°C (41.7°F), tends to be the coldest of the year.
What is the driest month in Sasebo?
January is the month with the least rainfall in Sasebo, Japan. Rain falls for 14.5 days and accumulates 38mm (1.5") of precipitation.
How much does it rain in Sasebo?
In Sasebo, during the entire year, the rain falls for 169 days and collects up to 900mm (35.43") of precipitation.
When does it snow in Sasebo?
Months with snowfall in Sasebo are January, February and December.
When does it snow the most in Sasebo?
January is the month with the most snowfall in Sasebo, Japan. Snow falls for 2.6 days and accumulates 6mm (0.24") of snow.
How much does it snow in Sasebo?
Throughout the year, in Sasebo, there are 5.1 snowfall days, and 14mm (0.55") of snow is accumulated.
What is the month with the least sunshine in Sasebo?
The months with the least sunshine in Sasebo, Japan, are January and December, with an average of 4.5h of sunshine.
What is the least humid month in Sasebo?
The least humid month is March, with an average relative humidity of 71%.
When it does not snow in Sasebo?
In Sasebo, Japan, snow does not fall in March through November.
What month is the sea coldest in Sasebo?
The month with the coldest seawater in Sasebo, Japan, is March, with an average sea temperature of 14.7°C (58.5°F).
When are the longest days in Sasebo?
The month with the longest days in Sasebo, Japan, is June, with an average of 14h and 18min of daylight.
What is the most humid month in Sasebo?
The most humid month in Sasebo is July, with an average relative humidity of 87%.
What is the wettest month in Sasebo?
The month with the most rainfall is July, when the rain falls for 19.7 days and typically aggregates up to 192mm (7.56") of precipitation.
When is the highest UV index in Sasebo?
With an average maximum UV index of 7, July is the month with the highest UV index.
What are the warmest months in Sasebo?
August, noted for its average high-temperature of 29.6°C (85.3°F) and an average low-temperature of 24.8°C (76.6°F), is considered the warmest month in Sasebo, Japan.
When is the sea warmest in Sasebo?
August is the month with the warmest seawater in Sasebo, Japan, with an average sea temperature of 27.7°C (81.9°F).
What month has the most sunshine in Sasebo?
August has the most sunshine of the year, with an average of 10.5h of sunshine.
What is the month with the shortest days in Sasebo?
December has the shortest days of the year in Sasebo, Japan, with an average of 10h and 0min of daylight.
Is there Daylight Saving Time (DST) in Sasebo?
Sasebo, Japan, does not observe Daylight Saving Time (DST). JST timezone is used over the entire year.
What is the month with the lowest UV index in Sasebo?
December is the month with the lowest UV index, with an average maximum UV index of 2.
Average temperature
Sasebo, Japan
The warmest month (with the highest average high temperature) is August (29.6°C).
The month with the lowest average high temperature is January (9.3°C).
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (5.4°C).
Average pressure
Sasebo, Japan
- Average pressure in January:
1022.2mbar - Average pressure in February:
1021.1mbar - Average pressure in March:
1018.7mbar - Average pressure in April:
1015.3mbar - Average pressure in May:
1011.9mbar - Average pressure in June:
1008mbar
- Average pressure in July:
1008.3mbar - Average pressure in August:
1008.3mbar - Average pressure in September:
1011.9mbar - Average pressure in October:
1016.7mbar - Average pressure in November:
1020.3mbar - Average pressure in December:
1021.7mbar
The month with the highest atmospheric pressure is January (1022.2mbar).
The month with the lowest atmospheric pressure is June (1008mbar).
Average wind speed
Sasebo, Japan
- Average wind speed in January:
16.7km/h - Average wind speed in February:
16.5km/h - Average wind speed in March:
16.3km/h - Average wind speed in April:
14.4km/h - Average wind speed in May:
11.9km/h - Average wind speed in June:
10.6km/h
- Average wind speed in July:
12.2km/h - Average wind speed in August:
11.7km/h - Average wind speed in September:
13.6km/h - Average wind speed in October:
15.6km/h - Average wind speed in November:
14.3km/h - Average wind speed in December:
16.7km/h
The windiest months (with the highest average wind speed) are January and December (16.7km/h).
The calmest month (with the lowest average wind speed) is June (10.6km/h).
Average humidity
Sasebo, Japan
The month with the highest relative humidity is July (87%).
The month with the lowest relative humidity is March (71%).
Average rainfall
Sasebo, Japan
The wettest month (with the highest rainfall) is July (192mm).
The driest month (with the least rainfall) is January (38mm).
Average rainfall days
Sasebo, Japan
- Average rainfall days in January:
14.5 days - Average rainfall days in February:
12.5 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
12.2 days - Average rainfall days in May:
9.5 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
19.7 days - Average rainfall days in August:
19.3 days - Average rainfall days in September:
14.3 days - Average rainfall days in October:
10 days - Average rainfall days in November:
12 days - Average rainfall days in December:
16.4 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is May (9.5 days).
Average snowfall
Sasebo, Japan
The month with the highest snowfall is January (6mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days
Sasebo, Japan
- Average snowfall days in January:
2.6 days - Average snowfall days in February:
1.4 days - Average snowfall days in March:
0.1 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
1 days
The month with the highest number of snowfall days is January (2.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature
Sasebo, Japan
The best month for swimming (with the highest average sea temperature) is August (27.7°C).
The coldest month (with the lowest average sea temperature) is March (14.7°C).
Average daylight / Average sunshine
Sasebo, Japan
- Average daylight in January:
10h and 1min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 5min - Average daylight in June:
14h and 2min
- Average daylight in July:
14h and 1min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 3min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
5h and 4min - Average sunshine in March:
7h and 1min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
8h and 0min
- Average sunshine in July:
8h and 4min - Average sunshine in August:
10h and 3min - Average sunshine in September:
8h and 1min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).
Average sunshine days
Sasebo, Japan
- Average sunshine days in January:
12.1 days - Average sunshine days in February:
11.5 days - Average sunshine days in March:
15.5 days - Average sunshine days in April:
16 days - Average sunshine days in May:
20.2 days - Average sunshine days in June:
12.1 days
- Average sunshine days in July:
9.5 days - Average sunshine days in August:
9.7 days - Average sunshine days in September:
13.8 days - Average sunshine days in October:
17.8 days - Average sunshine days in November:
15.2 days - Average sunshine days in December:
9.5 days
The month with the most sunshine days is May (20.2 days).
The months with the least sunshine days are July and December (9.5 days).
Average UV index
Sasebo, Japan
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover
Sasebo, Japan
The months with the most cloud cover are January and December (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 33).
Average visibility
Sasebo, Japan
The months with the highest visibility are January, February, March, April, September, October, November and December (10km).
The months with the lowest visibility are May, June, July and August (9km).
