| Sun May 19 | Mon May 20 | Tue May 21 | Wed May 22 | |
| Tmin 18-06 |
10°C | 11°C | 12°C | 11°C |
| Tmax 06-18 |
19°C | 21°C | 23°C | 25°C |
| morning 24-06 |
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| a.m. 06-12 |
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| p.m. 12-18 |
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| evening 18-24 |
| Nearby Forecast Locations - Karuizawa | Distance |
| Forecast: Karuizawa Region While on Monday it's still considerable cloudiness clouds will subsequently decrease. But Tuesday some rain is to be expected. The daily high increases from 21 degrees on Monday to 25 degrees on Wednesday. |