Saku Climate by Month
Saku, Nagano, Japan
Warm summers and cold winters, with rain spread through the year.
Saku has warm summers and cold winters, with rain spread through the year. August is the warmest month, with highs around 86°F (30°C); January is the coolest at 43°F (6°C), and nights dip to 24°F (-4°C). It gets 42 in (1065 mm) of rain a year, spread across the months.
- Warmest month
- 86°F(30°C)
- Average high, August
- Coldest nights
- 24°F(-4°C)
- Average low, January
- Rain per year
- 42 in(1065 mm)
- No clear rainy season
- Humidity
- 65%
- Sunniest: May
Best and worst months in Saku
Best for weatherThe most comfortable weather comes in May and June, with highs around 75°F (24°C) and about 4.4 in (113 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 43°F (6°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)
Saku weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 43°F(6°C) | 24°F(-4°C) | 1.5 in(37 mm) | 62% | 2.4 |
| FebFebruary | 44°F(7°C) | 25°F(-4°C) | 1.8 in(45 mm) | 59% | 3.1 |
| MarMarch | 52°F(11°C) | 30°F(-1°C) | 2.6 in(66 mm) | 57% | 3.8 |
| AprApril | 63°F(17°C) | 39°F(4°C) | 3.0 in(75 mm) | 55% | 4.7 |
| MayMayBest | 73°F(23°C) | 49°F(9°C) | 3.7 in(93 mm) | 55% | 5.2 |
| JunJuneBest | 77°F(25°C) | 58°F(14°C) | 5.2 in(132 mm) | 70% | 4.8 |
| JulJuly | 83°F(29°C) | 65°F(19°C) | 5.6 in(142 mm) | 72% | 4.9 |
| AugAugust | 86°F(30°C) | 67°F(19°C) | 4.5 in(115 mm) | 68% | 5.1 |
| SepSeptember | 77°F(25°C) | 60°F(15°C) | 5.6 in(143 mm) | 72% | 3.9 |
| OctOctober | 66°F(19°C) | 47°F(9°C) | 5.6 in(141 mm) | 76% | 2.9 |
| NovNovember | 56°F(14°C) | 35°F(2°C) | 1.9 in(47 mm) | 67% | 2.4 |
| DecDecember | 47°F(8°C) | 27°F(-3°C) | 1.1 in(29 mm) | 67% | 2.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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