Iwanuma Climate by Month
Iwanuma, Miyagi, Japan
Warm summers and cold winters, with rain spread through the year.
Warm summers and cold winters, with rain spread through the year: that's Iwanuma's climate in short. August is the warmest month, with highs around 82°F (28°C); January is the coolest at 43°F (6°C), and nights dip to 30°F (-1°C). About 49 in (1246 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 82°F(28°C)
- Average high, August
- Coldest nights
- 30°F(-1°C)
- Average low, January
- Rain per year
- 49 in(1246 mm)
- No clear rainy season
- Humidity
- 70%
- Sunniest: May
Best and worst months in Iwanuma
Best for weatherMay, June and September are the best time for weather in Iwanuma: highs near 73°F (23°C) and about 5.3 in (134 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 June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Iwanuma weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 43°F(6°C) | 30°F(-1°C) | 1.7 in(42 mm) | 69% | 2.2 |
| FebFebruary | 44°F(7°C) | 31°F(0°C) | 1.5 in(39 mm) | 65% | 2.9 |
| MarMarch | 51°F(10°C) | 36°F(2°C) | 2.7 in(69 mm) | 63% | 3.7 |
| AprApril | 61°F(16°C) | 44°F(7°C) | 3.8 in(97 mm) | 60% | 4.5 |
| MayMayBest | 69°F(20°C) | 54°F(12°C) | 3.9 in(98 mm) | 65% | 5.0 |
| JunJuneBest | 73°F(23°C) | 62°F(17°C) | 5.2 in(132 mm) | 78% | 4.7 |
| JulJuly | 80°F(26°C) | 69°F(21°C) | 6.6 in(168 mm) | 79% | 4.3 |
| AugAugust | 82°F(28°C) | 72°F(22°C) | 6.1 in(154 mm) | 79% | 4.4 |
| SepSeptemberBest | 77°F(25°C) | 65°F(18°C) | 6.8 in(172 mm) | 78% | 3.5 |
| OctOctober | 68°F(20°C) | 54°F(12°C) | 6.3 in(161 mm) | 71% | 2.9 |
| NovNovember | 58°F(15°C) | 42°F(6°C) | 2.4 in(61 mm) | 64% | 2.1 |
| DecDecember | 48°F(9°C) | 33°F(1°C) | 2.1 in(53 mm) | 70% | 1.9 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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