Isesaki Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Isesaki.
Climate overview of Isesaki
Isesaki, Gunma, Japan, sees big temperature differences between seasons, with August peaking at 31°C (88°F) and January dropping to 8°C (46°F).
Rain/snowfall is high, totalling around 1638 mm (64 in) per year. September is the wettest month and December the driest. The city also experiences a distinct rainy season from June to October. August is the sunniest month, averaging 6.9 hours of sunshine per day.
Isesaki Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Isesaki — and find the best time to visit.
Monthly Temperature in Isesaki
Visitors to Isesaki can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a very warm 31°C (88°F) in August, the warmest time of the year, to a chilly 8°C (46°F) during cooler months like January.
At night, you can expect temperatures ranging from 23°C (73°F) in August to around -1°C (30°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Isesaki
Isesaki is known for its substantial rain/snowfall, with annual precipitation reaching 1638 mm (64 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, September it receives heavy rainfall, averaging 224 mm (8.8 in) of precipitation, recorded across 20 rainy days. In contrast, the driest month December brings less rainfall, with 53 mm (2.1 in) over 7 rainy days. For more details, please visit our Isesaki 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 Isesaki
While the amount of sunshine in Isesaki varies throughout the year, all seasons offer their own charm. Enjoy up to 6.9 hours of daily sun in August, and experience slightly darker atmosphere in June, with about 4.4 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Isesaki by Month
The relative humidity is high throughout the year in Isesaki.
The city experiences its highest humidity in July, reaching 79%. In February, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Isesaki
The weather does bring rainfall during this period, between 125 mm (4.9 in) and 145 mm (5.7 in).
Plan accordingly for June, July, August, September and October, when conditions bring the heaviest precipitation. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
Frequently asked questions about the climate in Isesaki
What is the best time to visit Isesaki?
May typically offers the most optimal weather in Isesaki. In contrast, January, February and March tend to have less optimal conditions. Isesaki has a distinct rainy season from June to October.
What temperatures can I expect in Isesaki?
Daytime highs range from 8°C (46°F) in January to 31°C (88°F) in August. Nighttime lows range from -1°C (30°F) to 23°C (73°F). Temperatures vary considerably through the year.
How much rain does Isesaki get?
Annual rainfall is around 1638 mm (64 in). September is the wettest month with 224 mm (8.8 in), while December is the driest with 53 mm (2.1 in).
How sunny is Isesaki?
Isesaki receives around 2,173 hours of sunshine per year. August is the sunniest month with 207 hours, while June is the cloudiest with just 133 hours. Overall, Isesaki enjoys abundant sunshine.
Isesaki 3-Day Forecast
Isesaki 3-Day Forecast
Isesaki on the map
Isesaki is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Osaka
32°C (90°F) Tokyo30°C (86°F) Naha
30°C (86°F) Kyoto31°C (88°F) Hakone28°C (82°F) Hakuba26°C (79°F) Sapporo24°C (75°F) Niseko24°C (75°F) 
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