Karatsu Climate by Month
Karatsu, Saga, Japan
Hot summers and cool winters, with rain spread through the year.
Karatsu has hot summers and cool winters, with rain spread through the year. August is the warmest month, with highs around 88°F (31°C); January is the coolest at 50°F (10°C), and nights dip to 38°F (3°C). It gets 69 in (1745 mm) of rain a year, spread across the months.
- Warmest month
- 88°F(31°C)
- Average high, August
- Coldest nights
- 38°F(3°C)
- Average low, January
- Rain per year
- 69 in(1745 mm)
- No clear rainy season
- Humidity
- 68%
- Sunniest: May
Best and worst months in Karatsu
Best for weatherThe most comfortable weather comes in May and October, with highs around 74°F (23°C) and about 4.6 in (117 mm) of rain a month.
Least pleasantJanuary and July are the least pleasant; July is the wettest, with 11 in (270 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 October.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Karatsu weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 50°F(10°C) | 38°F(3°C) | 2.6 in(65 mm) | 62% | 2.1 |
| FebFebruary | 52°F(11°C) | 40°F(4°C) | 2.9 in(73 mm) | 58% | 2.8 |
| MarMarch | 58°F(14°C) | 45°F(7°C) | 4.2 in(106 mm) | 62% | 3.7 |
| AprApril | 66°F(19°C) | 52°F(11°C) | 5.3 in(134 mm) | 64% | 4.5 |
| MayMayBest | 74°F(23°C) | 60°F(16°C) | 5.2 in(131 mm) | 67% | 5.0 |
| JunJune | 78°F(26°C) | 68°F(20°C) | 11 in(286 mm) | 79% | 4.4 |
| JulJuly | 85°F(29°C) | 75°F(24°C) | 11 in(270 mm) | 80% | 4.7 |
| AugAugust | 88°F(31°C) | 77°F(25°C) | 7.2 in(182 mm) | 74% | 4.9 |
| SepSeptember | 82°F(28°C) | 71°F(21°C) | 9.0 in(229 mm) | 75% | 4.1 |
| OctOctoberBest | 74°F(23°C) | 61°F(16°C) | 4.0 in(102 mm) | 66% | 3.5 |
| NovNovember | 64°F(18°C) | 51°F(10°C) | 3.4 in(87 mm) | 68% | 2.5 |
| DecDecember | 54°F(12°C) | 41°F(5°C) | 3.1 in(80 mm) | 63% | 2.0 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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