Kosai Weather Year-Round — Best Time to Visit
Kosai, Japan has mild weather year-round. The best time to visit is May (score: 75/100). Annual average high: 19.6°C, total rainfall: 1872mm.
When is the best time to visit Kosai?
75
May is the best month to visit Kosai with a travel score of 75/100 (Good).
Expect highs of 22.2°C, 11 rain days, and 9.2 hours of daily sunshine.
View May weather details →Travel Score by Month
64
Jan
64
Feb
65
Mar
70
Apr
75
May
70
Jun
72
Jul
74
Aug
73
Sep
74
Oct
69
Nov
66
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Kosai each month?
19.6°C
Avg High
12.2°C
Avg Low
1872mm
Annual Rain
How much rain does Kosai get?
Kosai receives 1872mm of rain annually. The wettest month is typically June with 244mm, while January is the driest.
What is the weather like each month in Kosai?
January
64
9°C
Low: 2°C
5 rain days
Good
February
64
10°C
Low: 2°C
7 rain days
Good
March
65
14°C
Low: 5°C
10 rain days
Good
April
70
18°C
Low: 9°C
10 rain days
Good
May
Best time to visit75
22°C
Low: 14°C
11 rain days
Good
June
70
25°C
Low: 19°C
15 rain days
Good
July
72
29°C
Low: 23°C
15 rain days
Good
August
74
30°C
Low: 24°C
15 rain days
Good
September
73
27°C
Low: 21°C
14 rain days
Good
October
74
22°C
Low: 15°C
11 rain days
Good
November
69
17°C
Low: 9°C
9 rain days
Good
December
66
11°C
Low: 4°C
6 rain days
Good
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Data based on 1994–2024 averages · Last updated: 2024-12-31