Japan weather by month

Check out Japan weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum daytime temperature °C
10°C maximum daytime temperature in January in Tokyo10
10°C maximum daytime temperature in February in Tokyo10
13°C maximum daytime temperature in March in Tokyo13
19°C maximum daytime temperature in April in Tokyo19
23°C maximum daytime temperature in May in Tokyo23
25°C maximum daytime temperature in June in Tokyo25
29°C maximum daytime temperature in July in Tokyo29
31°C maximum daytime temperature in August in Tokyo31
27°C maximum daytime temperature in September in Tokyo27
21°C maximum daytime temperature in October in Tokyo21
17°C maximum daytime temperature in November in Tokyo17
12°C maximum daytime temperature in December in Tokyo12
Hours of sunshine (daily)
Days with some rainfall
9 days with some rainfall in January in Tokyo9
11 days with some rainfall in February in Tokyo11
16 days with some rainfall in March in Tokyo16
16 days with some rainfall in April in Tokyo16
16 days with some rainfall in May in Tokyo16
20 days with some rainfall in June in Tokyo20
19 days with some rainfall in July in Tokyo19
16 days with some rainfall in August in Tokyo16
19 days with some rainfall in September in Tokyo19
16 days with some rainfall in October in Tokyo16
12 days with some rainfall in November in Tokyo12
9 days with some rainfall in December in Tokyo9
Sea temperature °C
15°C sea temperature in January in Tokyo15
14°C sea temperature in February in Tokyo14
14°C sea temperature in March in Tokyo14
16°C sea temperature in April in Tokyo16
18°C sea temperature in May in Tokyo18
21°C sea temperature in June in Tokyo21
24°C sea temperature in July in Tokyo24
26°C sea temperature in August in Tokyo26
25°C sea temperature in September in Tokyo25
22°C sea temperature in October in Tokyo22
19°C sea temperature in November in Tokyo19
17°C sea temperature in December in Tokyo17

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Japan by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Japan (Tokyo) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Japan climate overview

Japan, a group of mountainous volcanic islands off the coast of Asia, has a predominantly temperate, seasonal climate with cool to cold but sunny winters, warm to hot summers and mild weather in the spring and autumn.

However, there are exceptions to this: the island of Hokkaido and the northern areas of Honshu experience heavy snows in the winter months when cold winds gust in from Siberia, gathering moisture from the sea as they come.

In central and southern Japan, winter is the (relatively) dry season while there is moderate rainfall in the summer and autumn with the chance of a typhoon, accompanied by heavy rainfall, blowing in from the South China Sea from July to September.

Tropical storm risk: Tokyo, Japan typhoon season

% of month affected by tropical storms
0
0
0
0
0
1.4%
2.3%
5.7%
4.8%
1.9%
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Southern summers tend to be warm and humid with heavy cloud cover. The mountain areas are usually the most pleasant parts of Japan in the summer months when conditions are predominantly sunny and crisp.

Spring is the best time to visit the lower parts of the country; it brings not only fresh, sunny weather but also the legendary 'cherry blossom time'.

What to pack for Japan

While light clothes are fine in the summer, you should combine light clothing with some warmer attire in the spring and autumn, and take much warmer clothing for the winter and visits to the mountain areas. Go prepared for rain in the summer.

Top Japan destinations

Below are average maximum temperatures at popular countries, regions and places in Japan for next month - November. Select a destination to see the climate guide for all months of the year.

All Japan destinations

Japan weather averages

Temperature in Japan (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
10°C maximum daytime temperature in January in Japan (Tokyo)10
10°C maximum daytime temperature in February in Japan (Tokyo)10
13°C maximum daytime temperature in March in Japan (Tokyo)13
19°C maximum daytime temperature in April in Japan (Tokyo)19
23°C maximum daytime temperature in May in Japan (Tokyo)23
25°C maximum daytime temperature in June in Japan (Tokyo)25
29°C maximum daytime temperature in July in Japan (Tokyo)29
31°C maximum daytime temperature in August in Japan (Tokyo)31
27°C maximum daytime temperature in September in Japan (Tokyo)27
21°C maximum daytime temperature in October in Japan (Tokyo)21
17°C maximum daytime temperature in November in Japan (Tokyo)17
12°C maximum daytime temperature in December in Japan (Tokyo)12
Min temperature (night-time)
0°C minimum night-time temperature in January in Japan (Tokyo)0
1°C minimum night-time temperature in February in Japan (Tokyo)1
4°C minimum night-time temperature in March in Japan (Tokyo)4
9°C minimum night-time temperature in April in Japan (Tokyo)9
14°C minimum night-time temperature in May in Japan (Tokyo)14
18°C minimum night-time temperature in June in Japan (Tokyo)18
22°C minimum night-time temperature in July in Japan (Tokyo)22
24°C minimum night-time temperature in August in Japan (Tokyo)24
20°C minimum night-time temperature in September in Japan (Tokyo)20
14°C minimum night-time temperature in October in Japan (Tokyo)14
8°C minimum night-time temperature in November in Japan (Tokyo)8
3°C minimum night-time temperature in December in Japan (Tokyo)3
Heat & Humidity
No heat & humidity in January in Japan (Tokyo)0
No heat & humidity in February in Japan (Tokyo)0
No heat & humidity in March in Japan (Tokyo)0
No heat & humidity in April in Japan (Tokyo)0
No heat & humidity in May in Japan (Tokyo)0
Low heat & humidity in June in Japan (Tokyo)L
High heat & humidity in July in Japan (Tokyo)H
High heat & humidity in August in Japan (Tokyo)H
Low heat & humidity in September in Japan (Tokyo)L
No heat & humidity in October in Japan (Tokyo)0
No heat & humidity in November in Japan (Tokyo)0
No heat & humidity in December in Japan (Tokyo)0
Sea temperature
15°C sea temperature in January in Japan (Tokyo)15
14°C sea temperature in February in Japan (Tokyo)14
14°C sea temperature in March in Japan (Tokyo)14
16°C sea temperature in April in Japan (Tokyo)16
18°C sea temperature in May in Japan (Tokyo)18
21°C sea temperature in June in Japan (Tokyo)21
24°C sea temperature in July in Japan (Tokyo)24
26°C sea temperature in August in Japan (Tokyo)26
25°C sea temperature in September in Japan (Tokyo)25
22°C sea temperature in October in Japan (Tokyo)22
19°C sea temperature in November in Japan (Tokyo)19
17°C sea temperature in December in Japan (Tokyo)17

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Japan

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Japan (Tokyo)10
11 hours of daylight per day in February in Japan (Tokyo)11
12 hours of daylight per day in March in Japan (Tokyo)12
13 hours of daylight per day in April in Japan (Tokyo)13
14 hours of daylight per day in May in Japan (Tokyo)14
15 hours of daylight per day in June in Japan (Tokyo)15
14 hours of daylight per day in July in Japan (Tokyo)14
13 hours of daylight per day in August in Japan (Tokyo)13
12 hours of daylight per day in September in Japan (Tokyo)12
11 hours of daylight per day in October in Japan (Tokyo)11
10 hours of daylight per day in November in Japan (Tokyo)10
10 hours of daylight per day in December in Japan (Tokyo)10
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in Japan (Tokyo)2
UV (maximum) index 3 (Moderate) in February in Japan (Tokyo)3
UV (maximum) index 5 (Moderate) in March in Japan (Tokyo)5
UV (maximum) index 7 (High) in April in Japan (Tokyo)7
UV (maximum) index 9 (Very High) in May in Japan (Tokyo)9
UV (maximum) index 10 (Very High) in June in Japan (Tokyo)10
UV (maximum) index 10 (Very High) in July in Japan (Tokyo)10
UV (maximum) index 10 (Very High) in August in Japan (Tokyo)10
UV (maximum) index 8 (Very High) in September in Japan (Tokyo)8
UV (maximum) index 5 (Moderate) in October in Japan (Tokyo)5
UV (maximum) index 3 (Moderate) in November in Japan (Tokyo)3
UV (maximum) index 2 (Low) in December in Japan (Tokyo)2

Rainfall in Japan

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
9 days with some rainfall in January in Japan (Tokyo)9
11 days with some rainfall in February in Japan (Tokyo)11
16 days with some rainfall in March in Japan (Tokyo)16
16 days with some rainfall in April in Japan (Tokyo)16
16 days with some rainfall in May in Japan (Tokyo)16
20 days with some rainfall in June in Japan (Tokyo)20
19 days with some rainfall in July in Japan (Tokyo)19
16 days with some rainfall in August in Japan (Tokyo)16
19 days with some rainfall in September in Japan (Tokyo)19
16 days with some rainfall in October in Japan (Tokyo)16
12 days with some rainfall in November in Japan (Tokyo)12
9 days with some rainfall in December in Japan (Tokyo)9
Average monthly rainfall (mm)
43 mm monthly rainfall in January in Japan (Tokyo)43
58 mm monthly rainfall in February in Japan (Tokyo)58
94 mm monthly rainfall in March in Japan (Tokyo)94
119 mm monthly rainfall in April in Japan (Tokyo)119
132 mm monthly rainfall in May in Japan (Tokyo)132
181 mm monthly rainfall in June in Japan (Tokyo)181
128 mm monthly rainfall in July in Japan (Tokyo)128
147 mm monthly rainfall in August in Japan (Tokyo)147
181 mm monthly rainfall in September in Japan (Tokyo)181
158 mm monthly rainfall in October in Japan (Tokyo)158
84 mm monthly rainfall in November in Japan (Tokyo)84
44 mm monthly rainfall in December in Japan (Tokyo)44

Tropical storm risk: Japan typhoon season

% of month affected by tropical storms
0
0
0
0
0
1.4%
2.3%
5.7%
4.8%
1.9%
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Compare Japan weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Japan (Tokyo) and the UK (London).

Maximum daytime temperature (°C)

Japan (Tokyo)
UK (London)
10
7
10
7
13
10
19
13
23
17
25
20
29
22
31
22
27
19
21
15
17
10
12
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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