| < December >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Average Daylight per day
|Sun altitude at solar noon on the 21st day.
- The average temperature in Karuizawa in December is slightly cold at -1.1 °C (30.02 °F).
- Afternoons can be cool with average high temperatures reaching 4.8 °C (40.6 °F).
- Overnight temperatures are generally cold with an average low of -6.4 °C (20.5 °F).
- The average diurnal temperature variation/ range in December is 11.2 °C (20.2 °F).
- The weather in December is somewhat parched. A paltry 23.3mm (0.9in) of water is deposited.
- The shortest day is 9:40 long and the longest day is 9:50 long with an average length of 9:43.
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Weather Trend Graph for December in Karuizawa, Japan
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