Iwamizawa Climate by Month
Iwamizawa, Hokkaido, Japan
Warm summers and freezing winters, with rain spread through the year.
Warm summers and freezing winters, with rain spread through the year: that's Iwamizawa's climate in short. Afternoon highs range from 29°F (-1°C) in January to 78°F (26°C) in August, and January nights average 15°F (-9°C). It gets 46 in (1168 mm) of rain a year, spread across the months.
- Warmest month
- 78°F(26°C)
- Average high, August
- Coldest nights
- 15°F(-9°C)
- Average low, January
- Rain per year
- 46 in(1168 mm)
- No clear rainy season
- Humidity
- 73%
- Sunniest: May
Best and worst months in Iwamizawa
Best for weatherThe most comfortable weather comes in June, July and September, with highs around 73°F (23°C) and about 4.3 in (109 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 29°F (-1°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)
Iwamizawa weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 29°F(-1°C) | 15°F(-9°C) | 3.7 in(95 mm) | 74% | 1.6 |
| FebFebruary | 31°F(0°C) | 16°F(-9°C) | 2.9 in(74 mm) | 69% | 2.5 |
| MarMarch | 39°F(4°C) | 24°F(-4°C) | 2.4 in(62 mm) | 67% | 3.5 |
| AprApril | 51°F(11°C) | 35°F(2°C) | 2.5 in(64 mm) | 63% | 4.3 |
| MayMay | 63°F(17°C) | 45°F(7°C) | 2.6 in(67 mm) | 71% | 5.0 |
| JunJuneBest | 70°F(21°C) | 53°F(12°C) | 2.8 in(72 mm) | 75% | 4.9 |
| JulJulyBest | 77°F(25°C) | 62°F(17°C) | 5.0 in(126 mm) | 78% | 4.5 |
| AugAugust | 78°F(26°C) | 64°F(18°C) | 5.9 in(149 mm) | 81% | 4.2 |
| SepSeptemberBest | 72°F(22°C) | 55°F(13°C) | 5.1 in(130 mm) | 75% | 3.6 |
| OctOctober | 60°F(16°C) | 43°F(6°C) | 3.8 in(97 mm) | 69% | 2.7 |
| NovNovember | 47°F(8°C) | 32°F(0°C) | 4.1 in(105 mm) | 74% | 1.6 |
| DecDecember | 34°F(1°C) | 21°F(-6°C) | 5.0 in(127 mm) | 80% | 1.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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