Climate and monthly weather forecastKoshihara, Japan
Climate and monthly weather forecast
Weather in January
January, like December, in Koshihara, Japan, is another refreshing winter month, with an average temperature varying between 17°C (62.6°F) and 18.9°C (66°F). January is the coldest month, with an average high-temperature of 18.9°C (66°F) and an average low-temperature of 17°C (62.6°F). Weather in January »Weather in February
February, the last month of the winter in Koshihara, is another refreshing month, with temperature in the range of an average low of 17.7°C (63.9°F) and an average high of 19.5°C (67.1°F). Welcoming February, Koshihara notes an average high-temperature of a still enjoyable 19.5°C (67.1°F), nearly consistent with January's 18.9°C (66°F). Weather in February »Weather in March
The first month of the spring, March, is an agreeable month in Koshihara, Japan, with an average temperature fluctuating between 20.6°C (69.1°F) and 18.3°C (64.9°F). At the onset of March, Koshihara records an average high-temperature of a pleasant 20.6°C (69.1°F), showing little deviation from the preceding month. Weather in March »Weather in April
April, like March, is another pleasant spring month in Koshihara, Japan, with an average temperature ranging between min 20.4°C (68.7°F) and max 22.2°C (72°F). April notes an average high-temperature of a still pleasant 22.2°C (72°F), subtly differing from March's 20.6°C (69.1°F). Weather in April »Weather in May
The last month of the spring, May, is a moderately hot month in Koshihara, Japan, with an average temperature ranging between min 23.2°C (73.8°F) and max 24.7°C (76.5°F). The onset of May manifests an average high-temperature of a moderately hot 24.7°C (76.5°F), demonstrating a minor variation from the preceding month. Weather in May »Weather in June
June, the first month of the summer in Koshihara, is also a moderately hot month, with an average temperature varying between 27.2°C (81°F) and 26.1°C (79°F). As June takes its course, Koshihara's average high-temperature registers at a still moderately hot 27.2°C (81°F), closely aligning with the preceding month. Weather in June »Weather in July
July, like June, in Koshihara, Japan, is a moderately hot summer month, with an average temperature fluctuating between 28.1°C (82.6°F) and 29°C (84.2°F). Koshihara's weather in July, with an average high-temperature of a still warm 29°C (84.2°F), subtly shifts from June's 27.2°C (81°F). Weather in July »Weather in August
August, the last month of the summer in Koshihara, is also a moderately hot month, with an average temperature ranging between max 29.4°C (84.9°F) and min 28.3°C (82.9°F). August stands out as Koshihara's warmest month, with temperatures ranging between an average high of 29.4°C (84.9°F) and a low of 28.3°C (82.9°F). The heat index in August is evaluated at a sweltering 36°C (96.8°F). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Koshihara, Japan, with an average temperature ranging between max 28.5°C (83.3°F) and min 27.3°C (81.1°F). Koshihara, Japan, marks the onset of September with an average high-temperature of a still warm 28.5°C (83.3°F), a subtle shift from August's 29.4°C (84.9°F). Weather in September »Weather in October
October, like September, in Koshihara, Japan, is another warm autumn month, with an average temperature ranging between min 25.2°C (77.4°F) and max 26.5°C (79.7°F). A minimal variation is noted in Koshihara's average high-temperature at the onset of October, reaching a still warm 26.5°C (79.7°F) from September's 28.5°C (83.3°F). Weather in October »Weather in November
November, the last month of the autumn in Koshihara, is also a moderately hot month, with temperature in the range of an average high of 23.9°C (75°F) and an average low of 22.3°C (72.1°F). November records an average high-temperature of a still warm 23.9°C (75°F), indicating a minor variation from the preceding month. Weather in November »Weather in December
December, the first month of the winter in Koshihara, is also an agreeable month, with an average temperature fluctuating between 20.6°C (69.1°F) and 18.8°C (65.8°F). The arrival of December is marked by a minor reduction in average high-temperature, sliding from a moderately hot 23.9°C (75°F) in November to an agreeable 20.6°C (69.1°F). 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
The month of January, characterized by an average high of 18.9°C (66°F) and a low of 17°C (62.6°F), is recognized as the coldest.
With an average relative humidity of 72%, January is the least humid month in Koshihara, Japan.
In Koshihara, Japan, during the entire year, the rain falls for 227.4 days and collects up to 1405mm (55.31") of precipitation.
With an average of 4.3h of sunshine, January has the least sunshine of the year in Koshihara, Japan.
The month with the least rainfall in Koshihara, Japan, is February, when the rain falls for 18.2 days and typically collects 59mm (2.32") of precipitation.
The most humid month is June, with an average relative humidity of 86%.
June is the month with the most rainfall in Koshihara. Rain falls for 21.5 days and accumulates 201mm (7.91") of precipitation.
With an average of 13h and 42min of daylight, June has the longest days of the year in Koshihara.
The months with the highest UV index in Koshihara, Japan, are June through September, with an average maximum UV index of 7.
The month with the most sunshine is July, with an average of 10.5h of sunshine.
August is Koshihara's warmest month, registering average high temperatures of 29.4°C (84.9°F) and lows of 28.3°C (82.9°F).
With an average of 10h and 30min of daylight, December has the shortest days of the year in Koshihara.
Koshihara does not observe Daylight Saving Time (DST). JST timezone is used throughout the entire year.
The month with the lowest UV index in Koshihara, Japan, is December, with an average maximum UV index of 4.
Average temperature
Koshihara, Japan
The warmest month (with the highest average high temperature) is August (29.4°C).
The month with the lowest average high temperature is January (18.9°C).
The month with the highest average low temperature is August (28.3°C).
The coldest month (with the lowest average low temperature) is January (17°C).
Average pressure
Koshihara, Japan
- Average pressure in January:
1020.8mbar - Average pressure in February:
1019.6mbar - Average pressure in March:
1017.9mbar - Average pressure in April:
1015.1mbar - Average pressure in May:
1011.1mbar - Average pressure in June:
1008.2mbar
- Average pressure in July:
1008.3mbar - Average pressure in August:
1006.6mbar - Average pressure in September:
1009mbar - Average pressure in October:
1012.8mbar - Average pressure in November:
1017.8mbar - Average pressure in December:
1019.8mbar
The month with the highest atmospheric pressure is January (1020.8mbar).
The month with the lowest atmospheric pressure is August (1006.6mbar).
Average wind speed
Koshihara, Japan
- Average wind speed in January:
27.3km/h - Average wind speed in February:
25.8km/h - Average wind speed in March:
25.1km/h - Average wind speed in April:
23.1km/h - Average wind speed in May:
20.1km/h - Average wind speed in June:
21.7km/h
- Average wind speed in July:
22.1km/h - Average wind speed in August:
22.3km/h - Average wind speed in September:
22.9km/h - Average wind speed in October:
28km/h - Average wind speed in November:
26.3km/h - Average wind speed in December:
28.4km/h
The windiest month (with the highest average wind speed) is December (28.4km/h).
The calmest month (with the lowest average wind speed) is May (20.1km/h).
Average humidity
Koshihara, Japan
The month with the highest relative humidity is June (86%).
The month with the lowest relative humidity is January (72%).
Average rainfall
Koshihara, Japan
- Average rainfall in January:
62mm - Average rainfall in February:
59mm - Average rainfall in March:
77mm - Average rainfall in April:
92mm - Average rainfall in May:
174mm - Average rainfall in June:
201mm
The wettest month (with the highest rainfall) is June (201mm).
The driest month (with the least rainfall) is February (59mm).
Average rainfall days
Koshihara, Japan
- Average rainfall days in January:
21.2 days - Average rainfall days in February:
18.2 days - Average rainfall days in March:
16.8 days - Average rainfall days in April:
16.5 days - Average rainfall days in May:
18.1 days - Average rainfall days in June:
21.5 days
- Average rainfall days in July:
16.4 days - Average rainfall days in August:
20.8 days - Average rainfall days in September:
20.1 days - Average rainfall days in October:
19.5 days - Average rainfall days in November:
17.1 days - Average rainfall days in December:
21.2 days
The month with the highest number of rainy days is June (21.5 days).
The month with the least rainy days is July (16.4 days).
Average daylight / Average sunshine
Koshihara, Japan
- Average daylight in January:
10h and 42min - Average daylight in February:
11h and 18min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 48min - Average daylight in May:
13h and 24min - Average daylight in June:
13h and 42min
- Average daylight in July:
13h and 36min - Average daylight in August:
13h and 0min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 30min - Average daylight in November:
10h and 54min - Average daylight in December:
10h and 30min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in January:
4h and 18min - Average sunshine in February:
5h and 24min - Average sunshine in March:
5h and 54min - Average sunshine in April:
6h and 48min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
9h and 0min - Average sunshine in September:
8h and 24min - Average sunshine in October:
6h and 18min - Average sunshine in November:
5h and 12min - Average sunshine in December:
4h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Koshihara, Japan
- Average sunshine days in January:
6 days - Average sunshine days in February:
6.8 days - Average sunshine days in March:
10.1 days - Average sunshine days in April:
11.5 days - Average sunshine days in May:
10.7 days - Average sunshine days in June:
7 days
- Average sunshine days in July:
11.9 days - Average sunshine days in August:
7.3 days - Average sunshine days in September:
7.3 days - Average sunshine days in October:
7.1 days - Average sunshine days in November:
8.1 days - Average sunshine days in December:
5.7 days
The month with the most sunshine days is July (11.9 days).
The month with the least sunshine days is December (5.7 days).
Average UV index
Koshihara, Japan
The months with the highest UV index are June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 4).
Average cloud cover
Koshihara, Japan
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility
Koshihara, Japan
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).
