Nikkō Weather in August
What's the weather like in Nikkō (Tochigi) in August 2025?
The climate in Nikkō during August can be summarized as warm, humid and very wet.
August is in the summer in Nikkō and is typically the warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (76°F), whilst at night 17°C (62°F) is normal.
| Daytime temperature | 24.7°C 76.4°F |
|---|---|
| Nightly temperature | 16.6°C 61.8°F |
| Average temperature | 20.6°C 69.1°F |
| Daily sunshine | 5.3 hrs |
| Avg rainfall | 318 mm 12.5 ins |
| Rainy days | 22 days |
| Sea temperature | 26°C 78.8°F |
| Humidity | 84% |
| Windspeed | 7.9kph 5 mph |
On average August is the wettest month of the year in Nikkō with around 318mm 12.5 inches of rain making it a very wet time to visit. This rainfall is typically spread over 22 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.3 hours of sunshine per day.
August temperatures in Nikkō
August rainfall
August hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Nikkō in August 2025.
Other monthly averages
Best places to visit in August
Nikkō weather stats
| Hottest month: | August | 24.5°C 76.1°F |
|---|---|---|
| Driest month: | December | 41mm 1.6ins |
| Sunniest month: | January | 6.1hrs |
| Coldest month: | January | 0.9°C 33.6°F |
| Wettest month: | August | 318mm 12.5ins |
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