Iwaki Climate by Month
Iwaki, Fukushima, Japan
Warm summers and cold winters, with rain spread through the year.
Iwaki has warm summers and cold winters, with rain spread through the year. August is the warmest month, with highs around 82°F (28°C); January is the coolest at 47°F (8°C), and nights dip to 30°F (-1°C). It gets 51 in (1299 mm) of rain a year, spread across the months.
- Warmest month
- 82°F(28°C)
- Average high, August
- Coldest nights
- 30°F(-1°C)
- Average low, January
- Rain per year
- 51 in(1299 mm)
- No clear rainy season
- Humidity
- 73%
- Sunniest: May
Best and worst months in Iwaki
Best for weatherThe most comfortable weather comes in June, July and September, with highs around 76°F (25°C) and about 5.5 in (139 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; February is the coldest, with highs of only 47°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 June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Iwaki weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 47°F(8°C) | 30°F(-1°C) | 1.7 in(44 mm) | 63% | 2.6 |
| FebFebruary | 47°F(9°C) | 31°F(0°C) | 2.0 in(50 mm) | 61% | 3.2 |
| MarMarch | 53°F(12°C) | 36°F(2°C) | 3.7 in(93 mm) | 61% | 3.9 |
| AprApril | 61°F(16°C) | 44°F(7°C) | 4.7 in(120 mm) | 67% | 4.6 |
| MayMay | 68°F(20°C) | 53°F(11°C) | 5.2 in(133 mm) | 78% | 5.1 |
| JunJuneBest | 73°F(23°C) | 60°F(16°C) | 5.3 in(135 mm) | 85% | 4.7 |
| JulJulyBest | 79°F(26°C) | 67°F(20°C) | 5.1 in(130 mm) | 86% | 4.6 |
| AugAugust | 82°F(28°C) | 70°F(21°C) | 4.5 in(115 mm) | 84% | 4.8 |
| SepSeptemberBest | 77°F(25°C) | 65°F(18°C) | 5.9 in(151 mm) | 81% | 3.7 |
| OctOctober | 69°F(21°C) | 54°F(12°C) | 7.9 in(201 mm) | 75% | 2.9 |
| NovNovember | 61°F(16°C) | 43°F(6°C) | 3.0 in(75 mm) | 69% | 2.4 |
| DecDecember | 51°F(11°C) | 33°F(1°C) | 2.0 in(52 mm) | 65% | 2.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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