Karuizawa in december: average Weather, Temperature and Climate
Weather in Karuizawa in december 2026
The weather in Karuizawa in december comes from statistical datas on the past years. You can view the weather statistics the entire month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout december
very bad weather 640.5cm
Weather at 6am
29°F
Snow showers
47% of time
23%
14%
13%
Weather at 12pm
38°F
Snow showers
37% of time
32%
18%
6%
Weather at 6pm
29°F
Snow showers
44% of time
22%
15%
12%
Weather at 3am
29°F
46%
21%
16%
11%
Evolution of daily average temperature and precipitation in Karuizawa in december
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Karuizawa in december.
The climate of Karuizawa in december is very bad
the weather in Karuizawa in december is wet (with 4in of rainfall over 6 days). It should be noted a worsening from the previous month since in november there is an average of 4.4in of rainfall over 5 days.
The climate is quite cold here december. Do not forget to take with you warm clothes! The high seasonal norm is 38°F. In the morning the temperature drops to 29°F. Thus, the mean temperature average on this month of december in Karuizawa is 32°F. Note that these seasonal averages are in contrast with those observed in Karuizawa in the month of december with a maximum record of 61°F in 2018 and a minimum record of 9°F in 2014. You can expect to have about 25 days with temperatures below 32°F, or 81% of the month.
Day length in Karuizawa in december is 09:41. Sunrise is at 06:50 and sets at 16:31.
December: another location in Japan?
If you want to go to Japan in december, there are destinations with better weather than Karuizawa:
In december, Ogasawara Islands, Tanega-shima, Yakushima and 'Aiea have good weather.
Finally, Tokyo, Kochi, Okinawa, Hakone, Kagoshima (Kyushu) and Miyakojima have a tolerable climate, but better than Karuizawa.
Seasonal average climate and temperature of Karuizawa in december
Check below seasonal norms These statistics are generated from the weather statements earlier years of the month of december.
| December | |||||
| Outside temperature | |||||
| Average temperature | 32°F | ||||
| Highest temperature | 38°F | ||||
| Lowest temperature | 29°F | ||||
| Highest record temperature | 61°F (2018) | ||||
| Lowest record temperature | 9°F (2014) | ||||
| Number of days at -32°F | 25 day(s) (81%) | ||||
| Wind | |||||
| Wind speed | 13km/h | ||||
| Wind temperature | 22°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4in | ||||
| Number of days with rainfall | 6 day(s) (18%) | ||||
| Record daily rainfall | 1.8in (2016) | ||||
| Snowfall | 640.5cm | ||||
| Other climate data | |||||
| Humidity | 88% | ||||
| Visibility | 7.67km | ||||
| Cloud cover | 42% | ||||
| UV index | 2 | ||||
| Daily sunshine hours | 8 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:50 | ||||
| Time of sunset | 16:31 | ||||
| Length of day | 09:41 | ||||
| Our opinion about the weather in december | |||||
| Our opinion at whereandwhen.net | very bad | ||||
How was the weather last december?
Here is the day by day recorded weather in Karuizawa in december 2025:
32°F to 50°F
34°F to 50°F
38°F to 45°F
22°F to 29°F
22°F to 34°F
23°F to 41°F
27°F to 43°F
32°F to 41°F
25°F to 36°F
29°F to 43°F
32°F to 45°F
22°F to 34°F
16°F to 34°F
32°F to 40°F
31°F to 34°F
20°F to 38°F
25°F to 45°F
31°F to 38°F
29°F to 47°F
38°F to 50°F
40°F to 47°F
25°F to 36°F
23°F to 34°F
32°F to 41°F
38°F to 45°F
22°F to 38°F
13°F to 25°F
16°F to 31°F
23°F to 40°F
25°F to 40°F
25°F to 36°F
Map: other cities in Japan in december
Cities near Karuizawa:
| Maebashi in december | very bad weather |
| Nagano in december | very bad weather |
| Matsumoto in december | very bad weather |
| Kofu in december | very bad weather |
| Joetsu in december | very bad weather |
| Nikko in december | very bad weather |
| Tokyo in december | tolerable weather |
| Takayama in december | very bad weather |
| Nagaoka in december | very bad weather |
| Toyama in december | very bad weather |
| Fuji in december | very bad weather |
| Hakone in december | tolerable weather |
Click over cities on the map for information about the weather in december.
Karuizawa
perfect weather
good
tolerable
bad
very bad
Weather data for Karuizawa in december:
Weather data for Karuizawa for december are derived from an average of the weather forecast since 2009 in Karuizawa. There is a margin of error and these forecasts are to be considered as general information only. The weather in Karuizawa can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Karuizawa.