Niihama Climate by Month
Niihama, Ehime, Japan
Hot summers and cool winters, with rain spread through the year.
The climate in Niihama is one of hot summers and cool winters, with rain spread through the year. Expect highs of 90°F (32°C) in August and 51°F (10°C) in January, with the coldest nights (January) near 35°F (2°C). About 63 in (1607 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 90°F(32°C)
- Average high, August
- Coldest nights
- 35°F(2°C)
- Average low, January
- Rain per year
- 63 in(1607 mm)
- No clear rainy season
- Humidity
- 70%
- Sunniest: August
Best and worst months in Niihama
Best for weatherThe most comfortable weather comes in May and October, with highs around 75°F (24°C) and about 6.6 in (167 mm) of rain a month.
Least pleasantJanuary and July are the least pleasant; July is the wettest, with 9.3 in (235 mm) of rain.
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 May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Niihama weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 51°F(10°C) | 35°F(2°C) | 1.7 in(44 mm) | 65% | 2.5 |
| FebFebruary | 53°F(11°C) | 36°F(2°C) | 2.4 in(62 mm) | 60% | 3.2 |
| MarMarch | 59°F(15°C) | 42°F(6°C) | 4.2 in(107 mm) | 64% | 4.1 |
| AprApril | 67°F(20°C) | 50°F(10°C) | 5.7 in(144 mm) | 65% | 4.9 |
| MayMayBest | 76°F(24°C) | 59°F(15°C) | 6.5 in(165 mm) | 70% | 5.2 |
| JunJune | 81°F(27°C) | 67°F(20°C) | 9.6 in(243 mm) | 77% | 4.7 |
| JulJuly | 87°F(31°C) | 75°F(24°C) | 9.3 in(235 mm) | 77% | 5.1 |
| AugAugust | 90°F(32°C) | 76°F(25°C) | 3.5 in(89 mm) | 75% | 5.4 |
| SepSeptember | 84°F(29°C) | 69°F(21°C) | 8.5 in(216 mm) | 74% | 4.3 |
| OctOctoberBest | 75°F(24°C) | 59°F(15°C) | 6.7 in(169 mm) | 72% | 3.5 |
| NovNovember | 64°F(18°C) | 48°F(9°C) | 3.1 in(78 mm) | 71% | 2.6 |
| DecDecember | 55°F(13°C) | 38°F(4°C) | 2.2 in(55 mm) | 65% | 2.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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