Tachikawa Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Tachikawa.
Climate overview of Tachikawa
Tachikawa, Tokyo Prefecture, Japan, sees big temperature differences between seasons, with August peaking at 31°C (88°F) and January dropping to 9°C (48°F).
The city has a wet climate, receiving around 1806 mm (71 in) of rain/snowfall per year. Despite the high annual total, it has a distinct rainy season from June to October, with very warm summers and cold winters. September is the wettest month. The sunniest month is January, with 6.7 hours of sunshine per day on average.
Tachikawa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Tachikawa - and find the best time to visit.
Monthly Temperature in Tachikawa
Visitors to Tachikawa can expect significant temperature changes throughout the year. On average, daytime temperatures range from a very warm 31°C (88°F) in August to a chilly 9°C (48°F) in January.
Nighttime temperatures range from 23°C (73°F) in August to -1°C (30°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Tachikawa
Tachikawa is known for its substantial rain/snowfall, with annual precipitation reaching 1806 mm (71 in). The seasons in Tachikawa bring significant changes in precipitation. The wettest month, September, receives heavy rainfall, with an average of 237 mm (9.3 in) of precipitation. This rainfall is distributed across 19 rainy days.
In contrast, the driest month, December, experiences much less rainfall, totaling 67 mm (2.6 in) over 7 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Tachikawa Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Tachikawa
Tachikawa enjoys sunny spells year-round. January sees up to 6.7 hours of daily sunshine, perfect for a sunny trip. June, the least sunny month, still offers a generous 4.2 hours of sun despite this cloudier time of the year.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Tachikawa
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May
- Warmest weather: July and August
- Most sunshine: January
- Fewest rainy days: January and December
- Seasonal pattern: A distinct rainy season from June to October, with very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -1°C (30°F).
Frequently asked questions about the climate in Tachikawa
What is the best time to visit Tachikawa?
May typically offers the most optimal weather in Tachikawa. In contrast, January, February and July tend to have less optimal conditions. Tachikawa has a distinct rainy season from June to October, with very warm summers and cold winters.
What temperatures can I expect in Tachikawa?
Daytime highs range from 9°C (48°F) in January to 31°C (88°F) in August. Nighttime lows range from -1°C (30°F) to 23°C (73°F). Temperatures vary considerably through the year.
How much rain does Tachikawa get?
Annual rainfall is around 1806 mm (71 in). September is the wettest month with 237 mm (9.3 in), while December is the driest with 67 mm (2.6 in).
How sunny is Tachikawa?
Tachikawa receives around 2,031 hours of sunshine per year. January is the sunniest month with 202 hours, while June is the cloudiest with just 127 hours. Overall, Tachikawa enjoys abundant sunshine.
Tachikawa 3-Day Forecast
Tachikawa on the map
Tachikawa is highlighted - select any city to see its climate.
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