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Tomamu, Japan Weather Averages

August is the hottest month in Tomamu with an average temperature of 21°C (69°F) and the coldest is January at -6°C (20°F). The wettest month is September with an average of 157mm of rain..

Average Temperature Tomamu

What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month

Average High Low Temperature Tomamu

What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

Average Rainfall Tomamu

What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

Tomamu : Next 24-Hour Weather

Today - 5th January 2026

Sunrise 07:03

Sunrise

Sunset 16:08

Sunset
18:00
Patchy heavy snow
-10°C (13°F)
19:00
Heavy snow
-11°C (11°F)
20:00
Heavy snow
-13°C (8°F)
21:00
Heavy snow
-13°C (8°F)
22:00
Heavy snow
-13°C (8°F)
23:00
Heavy snow
-13°C (8°F)

Tomorrow - 6th January 2026

Sunrise 07:03

Sunrise

Sunset 16:08

Sunset
0:00
Patchy heavy snow
-13°C (8°F)
1:00
Moderate snow
-13°C (7°F)
2:00
Moderate snow
-13°C (7°F)
3:00
Light snow
-15°C (5°F)
4:00
Moderate snow
-16°C (3°F)
5:00
Light snow
-17°C (1°F)
6:00
Freezing fog
-18°C (-1°F)
7:00
Freezing fog
-18°C (-1°F)
8:00
Mist
-17°C (1°F)
9:00
Partly cloudy
-12°C (10°F)
10:00
Light snow
-8°C (16°F)
11:00
Moderate snow
-7°C (19°F)
12:00
Moderate or heavy snow showers
-6°C (20°F)
13:00
Moderate or heavy snow showers
-6°C (20°F)
14:00
Moderate or heavy snow showers
-6°C (20°F)
15:00
Moderate or heavy snow showers
-7°C (19°F)
16:00
Patchy light snow
-10°C (13°F)
17:00
Light snow showers
-13°C (9°F)