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Sandachō Weather by Month
Average temperatures, rainfall and humidity for Sandachō, Japan, month by month, built from OpenWeather’s historical records. Use it to see what a typical Sandachō month looks like before you travel — then check the live Sandachō forecast for the days ahead.
Warmest month
August
32°C average high
Coolest month
January
1°C average low
Wettest month
June
164 mm of rain
Driest month
January
51 mm of rain
Average temperature and rainfall in Sandachō by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 9°C | 1°C | -10°C / 16°C | 51 mm | 70% | 13 km/h |
| February | 9°C | 2°C | -8°C / 19°C | 71 mm | 68% | 13 km/h |
| March | 14°C | 5°C | -4°C / 23°C | 114 mm | 68% | 13 km/h |
| April | 19°C | 10°C | -1°C / 28°C | 128 mm | 67% | 13 km/h |
| May | 23°C | 14°C | 3°C / 32°C | 102 mm | 69% | 11 km/h |
| June | 26°C | 19°C | 10°C / 34°C | 164 mm | 78% | 10 km/h |
| July | 31°C | 24°C | 15°C / 38°C | 134 mm | 81% | 10 km/h |
| August | 32°C | 24°C | 18°C / 39°C | 137 mm | 76% | 11 km/h |
| September | 29°C | 21°C | 12°C / 36°C | 130 mm | 76% | 11 km/h |
| October | 22°C | 15°C | 5°C / 32°C | 103 mm | 73% | 12 km/h |
| November | 17°C | 9°C | 1°C / 25°C | 67 mm | 70% | 11 km/h |
| December | 11°C | 4°C | -6°C / 23°C | 64 mm | 70% | 13 km/h |
Best time to visit Sandachō
The most comfortable time to visit Sandachō is generally May to June and October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around June, totalling about 1,266 mm a year.
Travellers who prefer heat should aim for August, when highs average 32°C. June is the month to avoid if rain would spoil your plans — it averages 164 mm, roughly 3× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Sandachō forecast for what is happening now.
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