Annual mean 17°C · wettest around June · prevailing wind W
Warmest
31.6 °C
Coldest
8.3 °C
Wettest
27%
Windiest
3.7 m/s
Prevailing
W
3.3 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 Niihama over the whole year is 17°C. August is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 4°C. The rainy (wet) season in Niihama runs from March to July, peaking in June with a 23% chance of rain on a given day. The dry season is October to February; January is the driest month, at 8%. Winds in Niihama are highest in January, averaging 3.1 m/s (11 km/h), and lightest in July, at 2.2 m/s (8 km/h). The prevailing wind is from the W. The clearest skies in Niihama come in November, when the sky is typically 57% covered; June is the cloudiest month, at 76%.
Month by month Niihama 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
9°C
4°C
5°C
8%
60%
3.1 m/s
1
0
37
February
9°C
4°C
5°C
11%
62%
3.0 m/s
2
0
38
March
13°C
7°C
10°C
17%
63%
2.8 m/s
18
0
68
April
18°C
12°C
15°C
17%
64%
2.7 m/s
59
1
83
May
22°C
16°C
21°C
17%
69%
2.5 m/s
85
16
66
June
25°C
20°C
26°C
23%
76%
2.3 m/s
62
53
23
July
29°C
25°C
32°C
20%
73%
2.2 m/s
10
47
1
August
31°C
26°C
34°C
14%
66%
2.5 m/s
4
30
0
September
28°C
23°C
30°C
19%
75%
2.5 m/s
30
58
8
October
23°C
17°C
22°C
14%
66%
2.5 m/s
76
27
57
November
17°C
11°C
15°C
10%
57%
2.6 m/s
55
2
84
December
11°C
6°C
7°C
8%
62%
2.9 m/s
7
0
55
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 Niihama weather by season
Year round, Niihama has days of about 9°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 17°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.
Niihama weather in winterDecember to February
High 10°CLow 4°CRain 9%
Winter in Niihama has typical daily highs of about 10°C and lows of about 4°C, with a 9% chance of rain on a given day.
Niihama weather in springMarch to May
High 18°CLow 12°CRain 17%
Spring in Niihama has typical daily highs of about 18°C and lows of about 12°C, with a 17% chance of rain on a given day.
Niihama weather in summerJune to August
High 28°CLow 24°CRain 19%
Summer in Niihama has typical daily highs of about 28°C and lows of about 24°C, with a 19% chance of rain on a given day.
Niihama weather in autumnSeptember to November
High 22°CLow 17°CRain 15%
Autumn in Niihama has typical daily highs of about 22°C and lows of about 17°C, with a 15% chance of rain on a given day.
When is the rainy season in Niihama?
The rainy (wet) season in Niihama runs from March to July, peaking in June with a 23% chance of rain on a given day. The dry season is October to February; January is the driest month, at 8%.
What time of year is Niihama windiest?
Winds in Niihama are highest in January, averaging 3.1 m/s (11 km/h), and lightest in July, at 2.2 m/s (8 km/h). The prevailing wind is from the W.
What is the average temperature in Niihama year round?
The average temperature in Niihama over the whole year is 17°C. August is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 4°C.