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Contents
- 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
Weather in January
January, like December, is a frosty winter month in Kosai, Japan, with an average temperature varying between 3.5°C (38.3°F) and 8.4°C (47.1°F). January, with its high-temperature average of 8.4°C (47.1°F) and a low-temperature average of 3.5°C (38.3°F), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also a frosty month in Kosai, Japan, with an average temperature varying between 4.1°C (39.4°F) and 9.3°C (48.7°F). Kosai in February witnesses an average high-temperature of a still chilly 9.3°C (48.7°F), indicating a slight variation from January's 8.4°C (47.1°F). Weather in February »
Weather in March
March, the first month of the spring in Kosai, is a fresh month, with an average temperature fluctuating between 6.5°C (43.7°F) and 12.3°C (54.1°F). March's arrival brings a modest temperature shift, moving from a chilly 9.3°C (48.7°F) in February to a fresh 12.3°C (54.1°F). Weather in March »
Weather in April
April is an enjoyable spring month in Kosai, Japan, with an average temperature fluctuating between 16.3°C (61.3°F) and 10.7°C (51.3°F). The average high-temperature mildly increases in April, edging from a fresh 12.3°C (54.1°F) in March to a refreshing 16.3°C (61.3°F). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Kosai, Japan, with an average temperature fluctuating between 20.9°C (69.6°F) and 15.3°C (59.5°F). Kosai's transition into May sees a mild rise in the average high-temperature, edging from an enjoyable 16.3°C (61.3°F) in April to an agreeable 20.9°C (69.6°F). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Kosai, Japan, with an average temperature varying between 23.7°C (74.7°F) and 19.1°C (66.4°F). The onset of June notes an average high-temperature of a warm 23.7°C (74.7°F), subtly shifted from May's 20.9°C (69.6°F). Weather in June »
Weather in July
July, like June, in Kosai, Japan, is a moderately hot summer month, with an average temperature fluctuating between 27.3°C (81.1°F) and 23°C (73.4°F). In Kosai, the average high-temperature in July slightly increases from a moderately hot 23.7°C (74.7°F) in June to a still warm 27.3°C (81.1°F). Weather in July »
Weather in August
August, the last month of the summer in Kosai, is another warm month, with an average temperature varying between 24.8°C (76.6°F) and 29.1°C (84.4°F). Temperature records mark August as the warmest month, with highs averaging 29.1°C (84.4°F) and lows at 24.8°C (76.6°F). The heat index in August is appraised at a sweltering 35°C (95°F). Weather in August »
Weather in September
September, the first month of the autumn in Kosai, is still a warm month, with an average temperature fluctuating between 25.8°C (78.4°F) and 21.3°C (70.3°F). During the shift to September, Kosai records a mild decrease in average high-temperature, moving from 29.1°C (84.4°F) in August to a still moderately hot 25.8°C (78.4°F). Weather in September »
Weather in October
October, like September, is another pleasant autumn month in Kosai, Japan, with temperature in the range of an average low of 16.7°C (62.1°F) and an average high of 21.5°C (70.7°F). The start of October comes with a small reduction in the average high-temperature, subtly receding from a warm 25.8°C (78.4°F) in September to an agreeable 21.5°C (70.7°F). Weather in October »
Weather in November
The last month of the autumn, November, is also an enjoyable month in Kosai, Japan, with an average temperature varying between 16.5°C (61.7°F) and 11.5°C (52.7°F). The arrival of November corresponds with a shift in temperature, down from an agreeable 21.5°C (70.7°F) in October to an enjoyable 16.5°C (61.7°F). Weather in November »
Weather in December
December, the first month of the winter in Kosai, is also a fresh month, with temperature in the range of an average high of 10.8°C (51.4°F) and an average low of 6.3°C (43.3°F). The arrival of December corresponds with a shift in temperature, down from a refreshing 16.5°C (61.7°F) in November to a cool 10.8°C (51.4°F). Weather in December »
Updated: Jun 7, 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 is the coldest time of year?
In Kosai, January is known for its average lowest temperatures, reaching a high of 8.4°C (47.1°F) and a low of 3.5°C (38.3°F).
What is the least humid month?
The months with the lowest humidity are January and February, with an average relative humidity of 67%.
What is the driest month in Kosai?
The month with the least rainfall is January, when the rain falls for 7.5 days and typically collects 27mm (1.06") of precipitation.
How much does it rain?
Throughout the year, there are 163.7 rainfall days, and 1017mm (40.04") of precipitation is accumulated.
When does it snow in Kosai?
January, February and December are months with snowfall.
How many days does it snow?
In Kosai, during the entire year, snow falls for 2.5 days and aggregates up to 4mm (0.16") of snow.
When is the lowest UV index in Kosai?
January is the month with the lowest UV index in Kosai, with an average maximum UV index of 2.
What is the snowiest month?
February is the month with the most snowfall. Snow falls for 0.9 days and accumulates 2mm (0.08") of snow.
What is the month with the least sunshine in Kosai?
The month with the least sunshine in Kosai is February, with an average of 5.9h of sunshine.
When it does not snow?
In Kosai, snow does not fall in March through November.
When is the sea coldest?
March is the month with the coldest seawater, with an average sea temperature of 15.1°C (59.2°F).
When are the longest days?
With an average of 14h and 24min of daylight, June has the longest days of the year.
What is the most humid month?
The most humid month is July, with an average relative humidity of 83%.
What is the rainiest month in Kosai?
The month with the most rainfall is July, when the rain falls for 20.6 days and typically aggregates up to 190mm (7.48") of precipitation.
What are the months with the highest UV index?
July and August, with an average maximum UV index of 7, are months with the highest UV index.
What are the warmest months?
August is Kosai's warmest month, registering average high temperatures of 29.1°C (84.4°F) and lows of 24.8°C (76.6°F).
What is the month with the warmest sea water?
August is the month with the warmest seawater, with an average sea temperature of 26.8°C (80.2°F).
What month has the most sunshine?
With an average of 10.8h of sunshine, August has the most sunshine of the year in Kosai.
What is the month with the shortest days in Kosai?
With an average of 9h and 54min of daylight, December has the shortest days of the year.
Is there Daylight Saving Time (DST)?
Kosai does not utilize Daylight Saving Time (DST). JST timezone is used throughout the entire year.
Average temperature
Kosai, Japan
The warmest month (with the highest average high temperature) is August (29.1°C).
The month with the lowest average high temperature is January (8.4°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 (3.5°C).
Average pressure
Kosai, Japan
- Average pressure in January:
1017.9mbar - Average pressure in February:
1018.3mbar - Average pressure in March:
1016.4mbar - Average pressure in April:
1014.6mbar - Average pressure in May:
1012.2mbar - Average pressure in June:
1009.1mbar
- Average pressure in July:
1009.8mbar - Average pressure in August:
1010.1mbar - Average pressure in September:
1013mbar - Average pressure in October:
1016.4mbar - Average pressure in November:
1018.7mbar - Average pressure in December:
1017.9mbar
The month with the highest atmospheric pressure is November (1018.7mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed
Kosai, Japan
- Average wind speed in January:
24.2km/h - Average wind speed in February:
22.2km/h - Average wind speed in March:
20.6km/h - Average wind speed in April:
18.7km/h - Average wind speed in May:
15.3km/h - Average wind speed in June:
13.3km/h
- Average wind speed in July:
12.8km/h - Average wind speed in August:
12.8km/h - Average wind speed in September:
14.7km/h - Average wind speed in October:
16.7km/h - Average wind speed in November:
17.7km/h - Average wind speed in December:
23.1km/h
The windiest month (with the highest average wind speed) is January (24.2km/h).
The calmest months (with the lowest average wind speed) are July and August (12.8km/h).
Average humidity
Kosai, Japan
The month with the highest relative humidity is July (83%).
The months with the lowest relative humidity are January and February (67%).
Average rainfall
Kosai, Japan
The wettest month (with the highest rainfall) is July (190mm).
The driest month (with the least rainfall) is January (27mm).
Average rainfall days
Kosai, Japan
- Average rainfall days in January:
7.5 days - Average rainfall days in February:
9.2 days - Average rainfall days in March:
12.9 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
11.9 days - Average rainfall days in June:
16.9 days
- Average rainfall days in July:
20.6 days - Average rainfall days in August:
18.6 days - Average rainfall days in September:
17.1 days - Average rainfall days in October:
14.9 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is July (20.6 days).
The month with the least rainy days is January (7.5 days).
Average snowfall
Kosai, Japan
The month with the highest snowfall is February (2mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days
Kosai, Japan
- Average snowfall days in January:
0.8 days - Average snowfall days in February:
0.9 days - Average snowfall days in March:
0.3 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:
0.5 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature
Kosai, Japan
The best month for swimming (with the highest average sea temperature) is August (26.8°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).
Average daylight / Average sunshine
Kosai, Japan
- Average daylight in January:
10h and 1min - 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 0min - 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 2min - Average daylight in December:
9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January:
6h and 2min - Average sunshine in February:
5h and 5min - Average sunshine in March:
7h and 2min - Average sunshine in April:
9h and 0min - Average sunshine in May:
9h and 4min - Average sunshine in June:
8h and 5min
- Average sunshine in July:
9h and 1min - Average sunshine in August:
10h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 4min - Average sunshine in November:
6h and 0min - Average sunshine in December:
6h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days
Kosai, Japan
- Average sunshine days in January:
19.9 days - Average sunshine days in February:
17.1 days - Average sunshine days in March:
16.8 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
17.1 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
8.7 days - Average sunshine days in August:
10.4 days - Average sunshine days in September:
11 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
17.2 days - Average sunshine days in December:
17.3 days
The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is July (8.7 days).
Average UV index
Kosai, Japan
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover
Kosai, Japan
The month with the most cloud cover is June (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 28).
Average visibility
Kosai, Japan
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
Kosai, Japan
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