Ōshū Climate by Month
Ōshū, Iwate, Japan
Warm summers and cold winters, with rain spread through the year.
Ōshū has warm summers and cold winters, with rain spread through the year. August is the warmest month, with highs around 83°F (29°C); January is the coolest at 36°F (2°C), and nights dip to 24°F (-4°C). About 50 in (1279 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 83°F(29°C)
- Average high, August
- Coldest nights
- 24°F(-4°C)
- Average low, January
- Rain per year
- 50 in(1279 mm)
- No clear rainy season
- Humidity
- 73%
- Sunniest: May
Best and worst months in Ōshū
Best for weatherThe most comfortable weather comes in June and September, with highs around 75°F (24°C) and about 5.3 in (135 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 36°F (2°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)
Ōshū weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 36°F(2°C) | 24°F(-4°C) | 2.7 in(68 mm) | 71% | 1.9 |
| FebFebruary | 38°F(3°C) | 25°F(-4°C) | 1.9 in(49 mm) | 67% | 2.5 |
| MarMarch | 47°F(8°C) | 31°F(-1°C) | 3.1 in(78 mm) | 62% | 3.5 |
| AprApril | 58°F(14°C) | 39°F(4°C) | 3.9 in(98 mm) | 61% | 4.5 |
| MayMay | 67°F(20°C) | 49°F(10°C) | 3.9 in(99 mm) | 72% | 4.9 |
| JunJuneBest | 74°F(23°C) | 58°F(15°C) | 4.7 in(119 mm) | 78% | 4.8 |
| JulJuly | 81°F(27°C) | 67°F(19°C) | 7.5 in(190 mm) | 78% | 4.4 |
| AugAugust | 83°F(29°C) | 69°F(21°C) | 4.8 in(121 mm) | 78% | 4.5 |
| SepSeptemberBest | 76°F(25°C) | 61°F(16°C) | 5.9 in(151 mm) | 80% | 3.5 |
| OctOctober | 65°F(19°C) | 48°F(9°C) | 5.6 in(143 mm) | 77% | 2.8 |
| NovNovember | 54°F(12°C) | 37°F(3°C) | 2.7 in(69 mm) | 78% | 2.0 |
| DecDecember | 41°F(5°C) | 29°F(-2°C) | 3.7 in(94 mm) | 73% | 1.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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