Monthly Weather in Japan
What is the average monthly temperature in Japan?
The average monthly temperature in Japan ranges from 5.7°C (42.3°F) in January to 29.3°C (84.7°F) in August. Japan temperature by month is given in the table below.
| Month | Celsius | Fahrenheit |
|---|---|---|
| January | 5.7°C | 42.3°F |
| February | 7.3°C | 45.1°F |
| March | 12.9°C | 55.2°F |
| April | 16.3°C | 61.3°F |
| May | 19.1°C | 66.4°F |
| June | 23.2°C | 73.8°F |
| July | 28.7°C | 83.7°F |
| August | 29.3°C | 84.7°F |
| September | 26.9°C | 80.4°F |
| October | 18.9°C | 66.0°F |
| November | 14.4°C | 57.9°F |
| December | 9.4°C | 48.9°F |
What is the hottest month in Japan?
The hottest months in Japan are August, July and September. During August the average temperature outside is 29.3°C (84.7°F), in July it is 28.7°C (83.7°F) and during September the air temperature is around 26.9°C (80.4°F).
What is the coldest month in Japan?
The coldest months in Japan are January, February and December. In January the average air temperature drops to 5.7°C (42.3°F), in February air temperature is 7.3°C (45.1°F) and during December it is 9.4°C (48.9°F).
How much does it rain on average in Japan?
On average it rains for 12 month(s) in Japan with an average of 15.8 days of rain per month. In total Japan has 190 rainy days in a year.
When does it rain the most in Japan?
In Japan it rains the most during the following months.
- June - on average 16.82mm (0.66 inches) of rainfall per day.
- May - on average 7.01mm (0.28 inches) of rainfall per day.
- September - on average 6.58mm (0.26 inches) of rainfall per day.
- March - on average 4.34mm (0.17 inches) of rainfall per day.
- August - on average 4.17mm (0.16 inches) of rainfall per day.
- October - on average 4.03mm (0.16 inches) of rainfall per day.
Does it snow in Japan?
Yes, it snows in Japan. The following months have the most amount of snow.
- February. Japan has 0.04mm (0 inches) of snowfall and 0.02 mm (0 inches) of snow on the ground in February.
- January. Japan has 0.02mm (0 inches) of snowfall and 0.01 mm (0 inches) of snow on the ground in January.
When is it windy in Japan?
The windiest months in Japan are May, April and June. In May the average windspeed is 29 km/h (18 mph), during April the windspeed is 25.8 km/h (16 mph) and in June the windspeed is 25.4 km/h (15.8 mph).
What are the least windy months in Japan?
The least windy months in Japan are December, January and October. In December the average windspeed is 14.7 km/h (9.1 mph), during January the windspeed is 15.9 km/h (9.9 mph) and in October the windspeed is 16.1 km/h (10 mph).
When is it cloudy in Japan?
The cloudiest months in Japan are June, May and September. On average in June 74.8% of sky is covered by clouds, in May 65.5% is covered by clouds and in September clouds cover about 58.8% of sky.
When does Japan have the clearest sky?
Japan has the clearest sky in December, January and February. In December 31.1% of sky is covered by clouds, in January clouds cover around 32.4% and during February clouds cover about 34.6% of sky.
What is the average daylight duration in Japan?
The average daylight duration in Japan is 12 hours 10 minutes 48 seconds.
Which months have the most daylight in Japan?
The longest days in Japan are during June, July and May.
- June - 14 hours 31 minutes 48 seconds of daylight.
- July - 14 hours 18 minutes 33 seconds of daylight.
- May - 14 hours 2 minutes 25 seconds of daylight.
Which months have the least daylight in Japan?
The shortest days in Japan are during December, January and November.
- December - 9 hours 47 minutes 24 seconds of daylight.
- January - 10 hours 2 minutes 43 seconds of daylight.
- November - 10 hours 18 minutes 41 seconds of daylight.
What are the humidity levels in Japan throughout the year?
Humidity levels in Japan range from 53.5% in February to 79.8% in June.
What are the pressure levels in Japan throughout the year?
Pressure levels in Japan change from 1008.6 mb (millibars) in June to 1019.5 mb in February.
What is the visibility in Japan throughout the year?
Visibility in Japan changes from lowest 11.3 km (7 miles) in June to highest 20.5 km (12.7 miles) in December.
What are the UV levels in Japan throughout the year?
UV levels change in Japan from 4.5 in December to 8.6 in July.
Which months have the highest UV levels in Japan throughout the year?
In Japan the highest UV index is during July, August and April. During July the average UV index is 8.6, in August UV level is 8.4 and in April UV index is around 8.
Which months have the lowest UV levels in Japan throughout the year?
The lowest UV levels in Japan are in December, January and November. In December the average UV index is around 4.5, in January UV index is 4.7 and during November UV level is 5.