Sanmu Climate by Month
Sanmu, Chiba, Japan
Warm summers and cool winters, with rain spread through the year.
The climate in Sanmu is one of warm summers and cool winters, with rain spread through the year. August is the warmest month, with highs around 85°F (30°C); January is the coolest at 49°F (9°C), and nights dip to 32°F (0°C). It gets 59 in (1509 mm) of rain a year, spread across the months.
- Warmest month
- 85°F(30°C)
- Average high, August
- Coldest nights
- 32°F(0°C)
- Average low, January
- Rain per year
- 59 in(1509 mm)
- No clear rainy season
- Humidity
- 71%
- Sunniest: May
Best and worst months in Sanmu
Best for weatherThe most comfortable weather comes in May and June, with highs around 73°F (23°C) and about 5.8 in (148 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 49°F (9°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)
Sanmu weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 49°F(9°C) | 32°F(0°C) | 2.4 in(61 mm) | 59% | 2.7 |
| FebFebruary | 50°F(10°C) | 33°F(1°C) | 3.0 in(76 mm) | 55% | 3.2 |
| MarMarch | 56°F(13°C) | 40°F(4°C) | 4.6 in(117 mm) | 62% | 3.9 |
| AprApril | 64°F(18°C) | 49°F(10°C) | 4.5 in(115 mm) | 70% | 4.6 |
| MayMayBest | 71°F(22°C) | 58°F(14°C) | 5.1 in(129 mm) | 73% | 5.0 |
| JunJuneBest | 76°F(24°C) | 64°F(18°C) | 6.6 in(167 mm) | 80% | 4.5 |
| JulJuly | 82°F(28°C) | 71°F(22°C) | 5.0 in(126 mm) | 83% | 4.7 |
| AugAugust | 85°F(30°C) | 74°F(23°C) | 4.8 in(121 mm) | 79% | 5.0 |
| SepSeptember | 80°F(27°C) | 68°F(20°C) | 7.9 in(200 mm) | 81% | 3.8 |
| OctOctober | 71°F(22°C) | 58°F(14°C) | 8.6 in(218 mm) | 77% | 3.0 |
| NovNovember | 62°F(17°C) | 47°F(8°C) | 4.3 in(108 mm) | 69% | 2.4 |
| DecDecember | 53°F(12°C) | 36°F(2°C) | 2.8 in(71 mm) | 60% | 2.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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