Annual mean 16°C · wettest around September · prevailing wind W
Warmest
31.7 °C
Coldest
7.0 °C
Wettest
28%
Windiest
4.4 m/s
Prevailing
W
3.9 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 Ōnan over the whole year is 16°C. August is the hottest month, with highs of about 31°C; February is the coldest, with lows of about 4°C. Ōnan has no sharply defined rainy season: the chance of rain on a given day runs from 14% in November, the driest month, to 23% in September, the wettest. Winds in Ōnan are highest in January, averaging 3.6 m/s (13 km/h), and lightest in June, at 2.8 m/s (10 km/h). The prevailing wind is from the W. The clearest skies in Ōnan come in November, when the sky is typically 62% covered; June is the cloudiest month, at 73%.
Month by month Ōnan 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
4°C
3°C
17%
71%
3.6 m/s
0
0
28
February
8°C
4°C
4°C
19%
70%
3.6 m/s
1
0
29
March
13°C
7°C
9°C
22%
66%
3.5 m/s
13
0
61
April
17°C
11°C
14°C
20%
64%
3.4 m/s
49
1
81
May
22°C
16°C
20°C
18%
66%
3.2 m/s
81
12
70
June
25°C
20°C
25°C
23%
73%
2.8 m/s
68
49
29
July
29°C
25°C
32°C
22%
72%
2.9 m/s
15
52
2
August
31°C
26°C
33°C
16%
65%
3.0 m/s
6
40
1
September
27°C
22°C
28°C
23%
73%
3.0 m/s
44
55
15
October
22°C
16°C
20°C
17%
66%
3.2 m/s
78
17
68
November
16°C
11°C
13°C
14%
62%
3.2 m/s
45
1
81
December
10°C
6°C
6°C
18%
72%
3.6 m/s
4
0
43
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 Ōnan weather by season
Year round, Ōnan has days of about 8°C at their warmest in January, its coolest month, and 31°C in August, its warmest; the coolest hours of the day run from 4°C to 26°C through the year, and the average temperature over the year is 16°C around the clock. Rain is most likely around September and least likely around November. 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.
Ōnan weather in winterDecember to February
High 9°CLow 5°CRain 18%
Winter in Ōnan has typical daily highs of about 9°C and lows of about 5°C, with a 18% chance of rain on a given day.
Ōnan weather in springMarch to May
High 17°CLow 11°CRain 20%
Spring in Ōnan has typical daily highs of about 17°C and lows of about 11°C, with a 20% chance of rain on a given day.
Ōnan weather in summerJune to August
High 28°CLow 24°CRain 20%
Summer in Ōnan has typical daily highs of about 28°C and lows of about 24°C, with a 20% chance of rain on a given day.
Ōnan weather in autumnSeptember to November
High 22°CLow 16°CRain 18%
Autumn in Ōnan has typical daily highs of about 22°C and lows of about 16°C, with a 18% chance of rain on a given day.
When is the rainy season in Ōnan?
Ōnan has no sharply defined rainy season: the chance of rain on a given day runs from 14% in November, the driest month, to 23% in September, the wettest.
What time of year is Ōnan windiest?
Winds in Ōnan are highest in January, averaging 3.6 m/s (13 km/h), and lightest in June, at 2.8 m/s (10 km/h). The prevailing wind is from the W.
What is the average temperature in Ōnan year round?
The average temperature in Ōnan over the whole year is 16°C. August is the hottest month, with highs of about 31°C; February is the coldest, with lows of about 4°C.