Annual mean 14°C · wettest around January · prevailing wind NW
Warmest
30.9 °C
Coldest
3.5 °C
Wettest
46%
Windiest
4.2 m/s
Prevailing
NW
3.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Jōetsu over the whole year is 14°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 1°C. The rainy (wet) season in Jōetsu runs from December to February, peaking in January with a 40% chance of rain on a given day. The dry season is March to November; May is the driest month, at 17%. Winds in Jōetsu are highest in January, averaging 3.1 m/s (11 km/h), and lightest in July, at 2.3 m/s (8 km/h). The prevailing wind is from the NW. The clearest skies in Jōetsu come in November, when the sky is typically 65% covered; September is the cloudiest month, at 78%.
Month by month Jōetsu 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
1°C
-0°C
40%
69%
3.1 m/s
0
0
8
February
5°C
1°C
0°C
32%
69%
3.1 m/s
0
0
12
March
10°C
4°C
6°C
24%
66%
2.9 m/s
7
0
41
April
15°C
9°C
12°C
20%
67%
3.0 m/s
32
0
70
May
21°C
14°C
18°C
17%
68%
2.7 m/s
73
10
72
June
24°C
19°C
24°C
19%
75%
2.5 m/s
69
41
38
July
28°C
23°C
31°C
23%
75%
2.3 m/s
21
52
5
August
30°C
24°C
32°C
18%
72%
2.4 m/s
13
44
3
September
26°C
20°C
27°C
22%
78%
2.3 m/s
50
49
22
October
19°C
14°C
18°C
22%
73%
2.5 m/s
64
12
68
November
14°C
8°C
10°C
26%
65%
2.7 m/s
25
0
65
December
7°C
3°C
3°C
38%
69%
3.1 m/s
1
0
23
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 Jōetsu weather by season
Year round, Jōetsu has days of about 4°C at their warmest in January, its coolest month, and 30°C in August, its warmest; the coolest hours of the day run from 1°C to 24°C through the year, and the average temperature over the year is 14°C around the clock. Rain is most likely around January and least likely around May. 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.
Jōetsu weather in winterDecember to February
High 5°CLow 1°CRain 36%
Winter in Jōetsu has typical daily highs of about 5°C and lows of about 1°C, with a 36% chance of rain on a given day.
Jōetsu weather in springMarch to May
High 15°CLow 9°CRain 20%
Spring in Jōetsu has typical daily highs of about 15°C and lows of about 9°C, with a 20% chance of rain on a given day.
Jōetsu weather in summerJune to August
High 27°CLow 22°CRain 20%
Summer in Jōetsu has typical daily highs of about 27°C and lows of about 22°C, with a 20% chance of rain on a given day.
Jōetsu weather in autumnSeptember to November
High 19°CLow 14°CRain 23%
Autumn in Jōetsu has typical daily highs of about 19°C and lows of about 14°C, with a 23% chance of rain on a given day.
When is the rainy season in Jōetsu?
The rainy (wet) season in Jōetsu runs from December to February, peaking in January with a 40% chance of rain on a given day. The dry season is March to November; May is the driest month, at 17%.
What time of year is Jōetsu windiest?
Winds in Jōetsu are highest in January, averaging 3.1 m/s (11 km/h), and lightest in July, at 2.3 m/s (8 km/h). The prevailing wind is from the NW.
What is the average temperature in Jōetsu year round?
The average temperature in Jōetsu over the whole year is 14°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 1°C.