Monthly climate averages for Nagoya, Japan. Based on 10-year ERA5 reanalysis data.
Cfa Humid Subtropical
Climate OverviewNagoya, Japan in September has warm conditions, with highs averaging 27.9°C (82°F). Rain falls on about 15 days this month, totalling around 170 mm. Sea temperature reaches 29°C (84°F).
This month falls at the beginning of Autumn.
Daily highs in September gradually drop from around 30°C (85°F) at the start to 26°C (79°F) by month's end.
September sees fairly even rainfall, totalling about 169 mm across the month.
The warmest days tend to fall around the 1th, averaging 30°C (86°F).
Compared to August, this month is about 4°C cooler with 1 more rainy days. Temperatures begin dropping heading into October.
Daily averages based on historical data (2016–2025)
Daytime temperatures around 28°C (82°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.
Rain most often builds later in the day, so mornings are typically the driest window and afternoon showers are more likely.
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 | 9°C / 0°C | 5°C / -4°C | 5days (43 mm) Good | 7.8h Good | 71% Muggy | 3.3 Moderate | Poor | View Details |
| February | 10°C / 0°C | 6°C / -3°C | 6days (61 mm) Good | 8.2h Good | 69% Muggy | 4.2 Moderate | Poor | View Details |
| March | 14°C / 4°C | 12°C / 1°C | 10days (116 mm) Wet | 8.3h Good | 70% Muggy | 4.8 Moderate | Fair | View Details |
| April | 19°C / 9°C | 18°C / 7°C | 10days (141 mm) Wet | 8.9h Good | 72% Muggy | 5.7 High | Good | View Details |
| May best | 23°C / 14°C | 24°C / 14°C | 10days (166 mm) Wet | 9h Good | 75% Muggy | 6 High | Excellent | View Details |
| June best | 26°C / 19°C | 29°C / 20°C | 15days (198 mm) Wet | 8.7h Good | 79% Humid | 6.4 High | Excellent | View Details |
| July | 30°C / 23°C | 35°C / 27°C | 16days (216 mm) Wet | 8.9h Good | 83% Humid | 7.5 Very High | Wet | View Details |
| August | 32°C / 24°C | 36°C / 29°C | 14days (152 mm) Wet | 9.9h Good | 80% Humid | 7.1 Very High | Poor | View Details |
| September | 28°C / 21°C | 31°C / 24°C | 15days (170 mm) Wet | 8.3h Good | 82% Humid | 6.3 High | Good | View Details |
| October best | 22°C / 14°C | 23°C / 14°C | 11days (156 mm) Wet | 7.4h Good | 79% Humid | 4.3 Moderate | Excellent | View Details |
| November best | 17°C / 7°C | 15°C / 5°C | 7days (71 mm) Good | 7.6h Good | 76% Humid | 3.6 Moderate | Good | View Details |
| December | 11°C / 2°C | 8°C / -1°C | 5days (45 mm) Good | 7.6h Good | 74% Muggy | 3 Moderate | Fair | 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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