Monthly climate averages for Tokyo, Japan. Based on 10-year ERA5 reanalysis data.
Cfa Humid Subtropical
Climate OverviewTokyo, Japan in January has cold conditions, with highs averaging around 8.8°C (48°F). Sea temperature stays cool at 10.7°C (51°F).
This month falls at the middle of Winter. Cold conditions dominate the month.
Temperatures remain fairly steady throughout January, with daily highs around 9°C (48°F).
Rainfall is heaviest during the last third of the month, while the first third tends to be drier.
The warmest days tend to fall around the 31th, averaging 9.3°C (49°F).
Compared to December, this month is about 2°C cooler with 0 fewer rainy days.
Daily averages based on historical data (2016–2025)
Cold daytime highs of 9°C (48°F) mean shorter outdoor excursions with warming breaks.
Rain usually comes in shorter passing showers rather than all-day rain.
1 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 | 6days (52 mm) Good | 7.8h Good | 70% Muggy | 3.2 Moderate | Poor | View Details |
| February | 10°C / 1°C | 6°C / -3°C | 7days (53 mm) Good | 8.4h Good | 68% Muggy | 3.9 Moderate | Poor | View Details |
| March | 14°C / 5°C | 11°C / 2°C | 12days (124 mm) Wet | 8h Good | 73% Muggy | 4.8 Moderate | Fair | View Details |
| April | 18°C / 10°C | 16°C / 8°C | 12days (119 mm) Wet | 8.7h Good | 75% Muggy | 5.6 High | Good | View Details |
| May best | 22°C / 15°C | 22°C / 15°C | 13days (128 mm) Wet | 8.7h Good | 77% Humid | 5.7 High | Excellent | View Details |
| June best | 25°C / 19°C | 27°C / 20°C | 14days (177 mm) Wet | 8.2h Good | 80% Humid | 6.5 High | Excellent | View Details |
| July | 29°C / 23°C | 33°C / 27°C | 13days (160 mm) Wet | 8.7h Good | 82% Humid | 7.5 Very High | Fair | View Details |
| August | 31°C / 25°C | 35°C / 29°C | 11days (117 mm) Wet | 9.8h Good | 80% Humid | 7.2 Very High | Fair | View Details |
| September best | 27°C / 21°C | 30°C / 24°C | 14days (165 mm) Wet | 7.6h Good | 82% Humid | 5.8 High | Excellent | View Details |
| October best | 21°C / 15°C | 21°C / 14°C | 14days (190 mm) Wet | 6.5h Fair | 79% Humid | 3.9 Moderate | Wet | View Details |
| November best | 16°C / 9°C | 14°C / 6°C | 10days (85 mm) Wet | 7.3h Good | 77% Humid | 3.2 Moderate | Good | View Details |
| December | 11°C / 3°C | 8°C / -1°C | 6days (48 mm) Good | 7.5h Good | 73% Muggy | 3 Moderate | Fair | View Details |
Full winter gear is a must — insulated coat, thermal base layers, warm hat, gloves, and waterproof boots.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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