Gunma Weather by Month: Temperature & Rainfall Guide

Gunma is a region in Japan. Many people wonder what the weather conditions are in Gunma over the year. What is the best time to visit Gunma?

This page shows the average weather conditions by month in Gunma over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Gunma is generally less favorable. January is a winter month. The temperatures range from very low in Katashina with 1°C (34°F) to low in Ota with 9°C (48°F). On average, this month is one of the coldest months of the year in Gunma. So be prepared and make sure to dress up warm.

Find more detailed climate information for Gunma in January here.

In February the weather in Gunma is generally less favorable. February is a winter month. The average maximum daytime temperatures are low and range from 2°C (36°F) in Katashina to 10°C (50°F) in Ota. It is a very cold month in some areas, so be prepared and make sure to dress up warm.

Find more detailed climate information for Gunma in February here.

In March the weather in Gunma ranges from less favorable in Minakami to mixed in Ota. The temperatures range from low in Katashina with 6°C (43°F) to moderate in Ota with 14°C (57°F).

Find more detailed climate information for Gunma in March here.

In April the weather in Gunma ranges from less favorable in Katashina to good in Takasaki. The temperatures range from moderate in Katashina with 12°C (54°F) to pleasant in Ota with 19°C (66°F).

Find more detailed climate information for Gunma in April here.

In May the weather in Gunma ranges from good in Katashina to very good in Minakami. The temperatures range from pleasant in Katashina with 18°C (64°F) to high in Ota with 24°C (75°F).

Find more detailed climate information for Gunma in May here.

In June the weather in Gunma ranges from mixed in Kusatsu to very good in Minakami. The temperatures range from pleasant in Katashina with 21°C (70°F) to high in Ota with 26°C (79°F).

Find more detailed climate information for Gunma in June here.

In July the weather in Gunma ranges from less favorable in Takasaki to mixed in Minakami. July is a summer month. The average maximum daytime temperatures are high and range from 25°C (77°F) in Katashina to 30°C (86°F) in Ota.

Find more detailed climate information for Gunma in July here.

In August the weather in Gunma ranges from less favorable in Takasaki to very good in Minakami. August is a summer month. The temperatures range from high in Katashina with 26°C (79°F) to very high in Ota with 31°C (88°F). On average, this month is one of the warmest months of the year in Gunma. So be prepared and make sure to dress lightly.

Find more detailed climate information for Gunma in August here.

In September the weather in Gunma ranges from mixed in Minakami to very good in Tsumagoi. September is a summer month. The average maximum daytime temperatures are high and range from 22°C (72°F) in Katashina to 27°C (81°F) in Ota.

Find more detailed climate information for Gunma in September here.

In October the weather in Gunma ranges from mixed in Kusatsu to good in Minakami. The temperatures range from moderate in Katashina with 16°C (61°F) to pleasant in Ota with 22°C (72°F).

Find more detailed climate information for Gunma in October here.

In November the weather in Gunma ranges from less favorable in Katashina to good in Shibukawa. The temperatures range from low in Katashina with 10°C (50°F) to moderate in Ota with 16°C (61°F).

Find more detailed climate information for Gunma in November here.

In December the weather in Gunma ranges from less favorable in Minakami to mixed in Takasaki. December is a winter month. The average maximum daytime temperatures are low and range from 4°C (39°F) in Katashina to 11°C (52°F) in Ota.

Find more detailed climate information for Gunma in December here.