Fukuoka is warmest in August, averaging 32° by day and 23° at night. The wettest month is July with 419 mm, and the year brings about 2169 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 10° | 0° | 81 mm | 15° | 10.0 h | Cool |
| February | 11° | 1° | 95 mm | 13° | 10.8 h | Cool |
| March | 16° | 4° | 143 mm | 13° | 11.8 h | Mild |
| April | 20° | 8° | 156 mm | 16° | 12.8 h | Mild |
| May | 24° | 13° | 220 mm | 19° | 13.7 h | Rainy season |
| June | 27° | 18° | 297 mm | 22° | 14.2 h | Rainy season |
| July | 30° | 22° | 419 mm | 26° | 14.0 h | Rainy season |
| August | 32° | 23° | 335 mm | 28° | 13.3 h | Rainy season |
| September | 28° | 19° | 210 mm | 26° | 12.2 h | Rainy season |
| October | 23° | 13° | 71 mm | 23° | 11.1 h | Sightseeing |
| November | 17° | 8° | 102 mm | 20° | 10.2 h | Sightseeing |
| December | 10° | 2° | 40 mm | 17° | 9.8 h | Cool |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: No month in Fukuoka combines swimming warmth with dry skies.
Walking the city: October and November — highs of 17–23° and no more than 102 mm of rain a month.
Wet season: May, June, July, August and September — up to 419 mm in a single month.