Monthly climate averages for Wakuya, Japan. Based on 10-year ERA5 reanalysis data.
Cfa Humid Subtropical
Climate OverviewWakuya, Japan in September has warm conditions, with highs averaging 24.1°C (75°F). Rain falls on about 12 days this month. Sea temperature reaches 26°C (79°F).
This month falls at the beginning of Autumn.
Daily highs in September gradually drop from around 26°C (78°F) at the start to 22°C (72°F) by month's end.
September sees fairly even rainfall, totalling about 137 mm across the month.
The warmest days tend to fall around the 1th, averaging 26°C (79°F).
Compared to August, this month is about 3°C cooler with 4 fewer rainy days. Temperatures begin dropping heading into October.
Daily averages based on historical data (2016–2025)
Daytime temperatures around 24°C (75°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.
Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.
3 of the last 5 yearly records were warmer than this month's long-run average.
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 4°C / -1°C | -1°C / -7°C | 9days (50 mm) Wet | 7.5h Good | 70% Muggy | 2.8 Moderate | Poor | View Details |
| February | 5°C / -1°C | 0°C / -6°C | 7days (39 mm) Good | 8.5h Good | 67% Muggy | 3.8 Moderate | Poor | View Details |
| March | 10°C / 2°C | 6°C / -2°C | 9days (87 mm) Wet | 8.7h Good | 70% Muggy | 4.7 Moderate | Poor | View Details |
| April | 14°C / 7°C | 12°C / 3°C | 10days (105 mm) Wet | 9.5h Good | 73% Muggy | 5.7 High | Fair | View Details |
| May | 19°C / 12°C | 19°C / 10°C | 12days (103 mm) Wet | 9.3h Good | 77% Humid | 5.9 High | Good | View Details |
| June best | 23°C / 16°C | 24°C / 17°C | 11days (113 mm) Wet | 9.3h Good | 83% Humid | 6.4 High | Excellent | View Details |
| July best | 26°C / 21°C | 30°C / 24°C | 14days (133 mm) Wet | 8.7h Good | 86% Very Muggy | 6.9 High | Excellent | View Details |
| August | 28°C / 23°C | 32°C / 26°C | 16days (169 mm) Wet | 9h Good | 86% Very Muggy | 6.9 High | Good | View Details |
| September best | 24°C / 19°C | 26°C / 20°C | 12days (137 mm) Wet | 8h Good | 83% Humid | 5.2 High | Excellent | View Details |
| October | 18°C / 12°C | 17°C / 11°C | 11days (138 mm) Wet | 7.4h Good | 78% Humid | 4 Moderate | Good | View Details |
| November | 13°C / 6°C | 10°C / 3°C | 7days (48 mm) Good | 7.7h Good | 75% Muggy | 3.1 Moderate | Fair | View Details |
| December | 7°C / 1°C | 2°C / -4°C | 9days (50 mm) Wet | 7.3h Good | 73% Muggy | 2.5 Moderate | Poor | View Details |
Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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