Isesaki Climate by Month
Isesaki, Gunma, Japan
Hot summers and cool winters, with rain spread through the year.
Isesaki has hot summers and cool winters, with rain spread through the year. Afternoon highs range from 50°F (10°C) in January to 89°F (32°C) in August, and January nights average 31°F (-1°C). About 49 in (1257 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 89°F(32°C)
- Average high, August
- Coldest nights
- 31°F(-1°C)
- Average low, January
- Rain per year
- 49 in(1257 mm)
- No clear rainy season
- Humidity
- 64%
- Sunniest: May
Best and worst months in Isesaki
Best for weatherThe most comfortable weather comes in May, with highs around 76°F (25°C) and about 4.0 in (102 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 50°F (10°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Isesaki weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 50°F(10°C) | 31°F(-1°C) | 2.4 in(60 mm) | 47% | 2.5 |
| FebFebruary | 51°F(11°C) | 32°F(0°C) | 2.2 in(57 mm) | 56% | 3.0 |
| MarMarch | 58°F(14°C) | 37°F(3°C) | 2.8 in(70 mm) | 54% | 3.7 |
| AprApril | 67°F(20°C) | 46°F(8°C) | 3.3 in(83 mm) | 57% | 4.5 |
| MayMayBest | 76°F(25°C) | 55°F(13°C) | 4.0 in(102 mm) | 60% | 5.0 |
| JunJune | 80°F(27°C) | 64°F(18°C) | 5.4 in(137 mm) | 70% | 4.5 |
| JulJuly | 87°F(31°C) | 71°F(22°C) | 5.9 in(151 mm) | 73% | 4.5 |
| AugAugust | 89°F(32°C) | 73°F(23°C) | 5.5 in(140 mm) | 72% | 4.7 |
| SepSeptember | 81°F(27°C) | 66°F(19°C) | 6.5 in(164 mm) | 74% | 3.6 |
| OctOctober | 71°F(22°C) | 55°F(13°C) | 6.7 in(169 mm) | 71% | 2.9 |
| NovNovember | 62°F(17°C) | 43°F(6°C) | 2.5 in(63 mm) | 67% | 2.3 |
| DecDecember | 54°F(12°C) | 34°F(1°C) | 2.4 in(61 mm) | 62% | 2.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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