Annual mean 15°C · wettest around June · prevailing wind E
Warmest
30.8 °C
Coldest
7.0 °C
Wettest
35%
Windiest
4.0 m/s
Prevailing
E
3.2 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 Hachiōji over the whole year is 15°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 1°C. Hachiōji has no sharply defined rainy season: the chance of rain on a given day runs from 15% in January, the driest month, to 31% in June, the wettest. Winds in Hachiōji are highest in April, averaging 3.1 m/s (11 km/h), and lightest in November, at 2.4 m/s (9 km/h). The prevailing wind is from the E. The clearest skies in Hachiōji come in January, when the sky is typically 37% covered; September is the cloudiest month, at 64%.
Month by month Hachiōji 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
8°C
1°C
3°C
15%
37%
2.6 m/s
0
0
26
February
8°C
2°C
4°C
18%
43%
3.0 m/s
2
0
31
March
12°C
6°C
8°C
26%
50%
3.0 m/s
15
0
58
April
17°C
10°C
14°C
28%
53%
3.1 m/s
48
3
74
May
21°C
15°C
19°C
28%
58%
2.9 m/s
76
16
61
June
24°C
19°C
24°C
31%
63%
2.6 m/s
60
43
27
July
28°C
23°C
31°C
27%
61%
2.6 m/s
19
43
7
August
30°C
24°C
32°C
27%
60%
2.7 m/s
9
34
4
September
26°C
21°C
27°C
28%
64%
2.5 m/s
42
47
18
October
20°C
15°C
19°C
27%
58%
2.6 m/s
66
16
62
November
15°C
9°C
12°C
19%
47%
2.4 m/s
40
0
78
December
10°C
3°C
6°C
16%
39%
2.4 m/s
4
0
48
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 Hachiōji weather by season
Year round, Hachiōji has days of about 8°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 15°C around the clock. Rain is most likely around June 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.
Hachiōji weather in winterDecember to February
High 9°CLow 2°CRain 17%
Winter in Hachiōji has typical daily highs of about 9°C and lows of about 2°C, with a 17% chance of rain on a given day.
Hachiōji weather in springMarch to May
High 17°CLow 10°CRain 27%
Spring in Hachiōji has typical daily highs of about 17°C and lows of about 10°C, with a 27% chance of rain on a given day.
Hachiōji weather in summerJune to August
High 27°CLow 22°CRain 28%
Summer in Hachiōji has typical daily highs of about 27°C and lows of about 22°C, with a 28% chance of rain on a given day.
Hachiōji weather in autumnSeptember to November
High 20°CLow 15°CRain 25%
Autumn in Hachiōji has typical daily highs of about 20°C and lows of about 15°C, with a 25% chance of rain on a given day.
When is the rainy season in Hachiōji?
Hachiōji has no sharply defined rainy season: the chance of rain on a given day runs from 15% in January, the driest month, to 31% in June, the wettest.
What time of year is Hachiōji windiest?
Winds in Hachiōji are highest in April, averaging 3.1 m/s (11 km/h), and lightest in November, at 2.4 m/s (9 km/h). The prevailing wind is from the E.
What is the average temperature in Hachiōji year round?
The average temperature in Hachiōji over the whole year is 15°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 1°C.