Annual mean 12°C · wettest around July · prevailing wind S
Warmest
28.6 °C
Coldest
3.5 °C
Wettest
30%
Windiest
3.1 m/s
Prevailing
S
2.5 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Kōshū over the whole year is 12°C. August is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -3°C. The rainy (wet) season in Kōshū runs from March to October, peaking in July with a 24% chance of rain on a given day. The dry season is November to February; January is the driest month, at 7%. Winds in Kōshū are highest in April, averaging 2.4 m/s (9 km/h), and lightest in November, at 1.7 m/s (6 km/h). The prevailing wind is from the S. The clearest skies in Kōshū come in January, when the sky is typically 37% covered; September is the cloudiest month, at 71%.
Month by month Kōshū climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
4°C
-3°C
-1°C
7%
37%
2.1 m/s
0
0
18
February
5°C
-2°C
0°C
9%
44%
2.3 m/s
1
0
23
March
9°C
2°C
5°C
18%
52%
2.2 m/s
12
0
49
April
15°C
7°C
11°C
18%
57%
2.4 m/s
42
2
68
May
19°C
12°C
17°C
18%
61%
2.1 m/s
68
15
58
June
22°C
16°C
22°C
23%
68%
2.0 m/s
57
39
30
July
26°C
21°C
28°C
24%
68%
1.9 m/s
19
45
9
August
27°C
21°C
30°C
21%
66%
1.9 m/s
12
40
9
September
23°C
18°C
24°C
22%
71%
1.8 m/s
44
45
22
October
17°C
12°C
16°C
20%
63%
1.8 m/s
58
13
60
November
12°C
5°C
9°C
10%
49%
1.7 m/s
29
0
70
December
7°C
-1°C
3°C
7%
39%
1.9 m/s
3
0
35
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Kōshū weather by season
Year round, Kōshū has days of about 4°C at their warmest in January, its coolest month, and 27°C in August, its warmest; the coolest hours of the day run from -3°C to 21°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around July and least likely around January. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Kōshū weather in winterDecember to February
High 5°CLow -2°CRain 8%
Winter in Kōshū has typical daily highs of about 5°C and lows of about -2°C, with a 8% chance of rain on a given day.
Kōshū weather in springMarch to May
High 14°CLow 7°CRain 18%
Spring in Kōshū has typical daily highs of about 14°C and lows of about 7°C, with a 18% chance of rain on a given day.
Kōshū weather in summerJune to August
High 25°CLow 19°CRain 23%
Summer in Kōshū has typical daily highs of about 25°C and lows of about 19°C, with a 23% chance of rain on a given day.
Kōshū weather in autumnSeptember to November
High 18°CLow 11°CRain 17%
Autumn in Kōshū has typical daily highs of about 18°C and lows of about 11°C, with a 17% chance of rain on a given day.
When is the rainy season in Kōshū?
The rainy (wet) season in Kōshū runs from March to October, peaking in July with a 24% chance of rain on a given day. The dry season is November to February; January is the driest month, at 7%.
What time of year is Kōshū windiest?
Winds in Kōshū are highest in April, averaging 2.4 m/s (9 km/h), and lightest in November, at 1.7 m/s (6 km/h). The prevailing wind is from the S.
What is the average temperature in Kōshū year round?
The average temperature in Kōshū over the whole year is 12°C. August is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -3°C.