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Gunma

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Travel Info
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Travel Info

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Gunma Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Gunma year round climate

  • Spring (March–May): Average 6.7–15.9°C, the climate gradually changes from cold to warm, with increasing rainfall. March and April may still experience cold snaps. Common activities: cherry blossom viewing, hiking, hot spring trips. Recommended clothing: light jacket, long-sleeved shirt, add warm clothing in the mornings and evenings.
  • Summer (June–August): Average 20.4–26.4°C, warm and humid climate, abundant rainfall, and frequent afternoon thunderstorms. Common activities: mountain hiking, water activities, sightseeing in summer resorts. Recommended clothing: light and breathable clothing, short sleeves, shorts, bring rain gear.
  • Autumn (September–November): Average 9.6–23.6°C, pleasant and comfortable climate, changing from warm to cool, with decreasing rainfall. Common activities: maple leaf viewing, hiking, hot spring trips. Recommended clothing: long-sleeved shirt, light jacket, add warm clothing in the mornings and evenings.
  • Winter (December–February): Average 0.9–4.5°C, cold and dry climate, low rainfall. Common activities: skiing, hot spring experiences. Recommended clothing: warm coat, sweater, scarf, gloves, hat.

Gunma climatological average

Annual average temperature: approx. 13.6°C / Annual rainfall: approx. 1323 mm / Summer humidity: 70%–80% / Rainiest month: August

Gunma monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
0.9°C
23.6
February
2.1°C
45.3
March
6.7°C
93.5
April
12.5°C
112.1
May
15.9°C
163.8
June
20.4°C
182.5
July
25.2°C
174.2
August
26.4°C
188.3
September
23.6°C
183.4
October
15°C
78
November
9.6°C
57.6
December
4.5°C
21

Gunma weather for the next seven days

5/4
Monday
Patchy rain nearby
26.6°C/10.1°C
5/5
Tuesday
Sunny
20.5°C/5.6°C
5/6
Wednesday
Sunny
20.7°C/7.3°C
5/7
Thursday
Partly Cloudy
25.4°C/12.1°C
5/8
Friday
Patchy rain nearby
23°C/9.9°C
5/9
Saturday
Sunny
23.1°C/5°C
5/10
Sunday
Sunny
25.3°C/8°C

Gunma Frequently Asked Questions and Useful Information for Travel

What is the best season to visit?

The best tourist seasons in Gunma Prefecture are cherry blossom viewing in spring, maple viewing in autumn and skiing in winter.

What are the must-visit attractions?

Must-visit attractions include Kusatsu Onsen, Shiman Onsen, Minakami Onsen, Mount Haruna, and Ikaho Onsen.