Ōmachi Climate by Month
Ōmachi, Nagano, Japan
Warm summers and cold winters, with rain spread through the year.
The climate in Ōmachi is one of warm summers and cold winters, with rain spread through the year. Expect highs of 84°F (29°C) in August and 37°F (3°C) in January, with the coldest nights (January) near 20°F (-6°C). About 46 in (1176 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 84°F(29°C)
- Average high, August
- Coldest nights
- 20°F(-6°C)
- Average low, January
- Rain per year
- 46 in(1176 mm)
- No clear rainy season
- Humidity
- 71%
- Sunniest: August
Best and worst months in Ōmachi
Best for weatherMay, June and September are the best time for weather in Ōmachi: highs near 74°F (23°C) and about 4.9 in (125 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 37°F (3°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 June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Ōmachi weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 37°F(3°C) | 20°F(-6°C) | 2.4 in(62 mm) | 76% | 2.1 |
| FebFebruary | 38°F(4°C) | 21°F(-6°C) | 2.4 in(60 mm) | 72% | 2.9 |
| MarMarch | 47°F(9°C) | 28°F(-2°C) | 3.5 in(88 mm) | 66% | 3.8 |
| AprApril | 61°F(16°C) | 39°F(4°C) | 3.7 in(94 mm) | 58% | 4.7 |
| MayMayBest | 71°F(21°C) | 49°F(9°C) | 3.8 in(97 mm) | 63% | 5.2 |
| JunJuneBest | 75°F(24°C) | 57°F(14°C) | 5.3 in(134 mm) | 74% | 4.8 |
| JulJuly | 81°F(27°C) | 65°F(18°C) | 5.7 in(144 mm) | 76% | 4.9 |
| AugAugust | 84°F(29°C) | 66°F(19°C) | 4.2 in(107 mm) | 71% | 5.2 |
| SepSeptemberBest | 75°F(24°C) | 59°F(15°C) | 5.7 in(144 mm) | 75% | 3.8 |
| OctOctober | 64°F(18°C) | 47°F(8°C) | 4.7 in(119 mm) | 79% | 2.9 |
| NovNovember | 54°F(12°C) | 36°F(2°C) | 2.8 in(71 mm) | 69% | 2.2 |
| DecDecember | 42°F(6°C) | 26°F(-3°C) | 2.2 in(56 mm) | 74% | 1.8 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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