Nagano Weather Year-Round — Best Time to Visit
Nagano, Japan has mild weather year-round. The best time to visit is May (score: 72/100). Annual average high: 16°C, total rainfall: 1666mm.
When is the best time to visit Nagano?
72
May is the best month to visit Nagano with a travel score of 72/100 (Good).
Expect highs of 21°C, 13 rain days, and 9.8 hours of daily sunshine.
View May weather details →Travel Score by Month
35
Jan
42
Feb
48
Mar
62
Apr
72
May
71
Jun
66
Jul
72
Aug
70
Sep
63
Oct
52
Nov
40
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Nagano each month?
16°C
Avg High
7°C
Avg Low
1666mm
Annual Rain
How much rain does Nagano get?
Nagano receives 1666mm of rain annually. The wettest month is typically July with 214mm, while February is the driest.
What is the weather like each month in Nagano?
January
35
3°C
Low: -5°C
20 rain days
Poor
February
42
4°C
Low: -4°C
17 rain days
Mixed
March
48
8°C
Low: -1°C
17 rain days
Mixed
April
62
15°C
Low: 4°C
13 rain days
Good
May
Best time to visit72
21°C
Low: 10°C
13 rain days
Good
June
71
24°C
Low: 15°C
16 rain days
Good
July
66
27°C
Low: 19°C
20 rain days
Good
August
72
29°C
Low: 20°C
17 rain days
Good
September
70
25°C
Low: 16°C
15 rain days
Good
October
63
19°C
Low: 10°C
14 rain days
Good
November
52
12°C
Low: 3°C
15 rain days
Mixed
December
40
6°C
Low: -2°C
18 rain days
Poor
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Data based on 1994–2024 averages · Last updated: 2024-12-31