Tsumagoi Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Tsumagoi.
Climate overview of Tsumagoi
Temperatures in Tsumagoi, Gunma, Japan, vary greatly throughout the year. August is the hottest month at 28°C (82°F), while January is the coldest at 3°C (37°F).
The city receives considerable rain/snowfall, with around 1605 mm (63 in) annually. July is the wettest month. It has warm summers and cold winters. May is the sunniest month, averaging 7.0 hours of sunshine per day.
Tsumagoi Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Tsumagoi - and find the best time to visit.
Monthly Temperature in Tsumagoi
The climate in Tsumagoi is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 28°C (82°F) in August to a chilly 3°C (37°F) in the coolest month, January.
Nights vary from 19°C (66°F) in August to around -6°C (21°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Tsumagoi
Tsumagoi has a notably wet climate with abundant precipitation, recording 1605 mm (63 in) of rain/snowfall per year. The climate in Tsumagoi shows significant variation throughout the year. Expect heavy rainfall in July, the wettest month, with an average of 219 mm (8.6 in) of precipitation over 23 rainy days.
In contrast, the driest month November offers drier and sunnier days, with around 79 mm (3.1 in) of rainfall over 15 rainy days. For more details, please visit our Tsumagoi Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Tsumagoi
Tsumagoi offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between May (7.0 hours daily) and January (4.3 hours daily) provides a bit of variety for visitors and residents.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Tsumagoi by Month
The relative humidity is high throughout the year in Tsumagoi.
The city experiences its highest humidity in January, reaching 78%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Tsumagoi
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, August and September
- Warmest weather: July and August
- Most sunshine: May and August
- Fewer rainy days: April, May, October, November and December
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around -6°C (21°F).
Frequently asked questions about the climate in Tsumagoi
What is the best time to visit Tsumagoi?
May, August and September typically offer the most optimal weather in Tsumagoi. In contrast, January, February, March and December tend to have less optimal conditions. Tsumagoi has warm summers and cold winters.
What temperatures can I expect in Tsumagoi?
Daytime highs range from 3°C (37°F) in January to 28°C (82°F) in August. Nighttime lows range from -6°C (21°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Tsumagoi get?
Annual rainfall is around 1605 mm (63 in). July is the wettest month with 219 mm (8.6 in), while November is the driest with 79 mm (3.1 in).
How sunny is Tsumagoi?
Tsumagoi receives around 1,951 hours of sunshine per year. May is the sunniest month with 209 hours, while January is the cloudiest with just 128 hours.
Tsumagoi 3-Day Forecast
Tsumagoi on the map
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