Climate · Karuizawa

Karuizawa in January

Cold and damp, as the days lengthen.

Typical weather, averaged over 30 years

January in Karuizawa is cold: highs near 38°F, lows near 21°F. Rain or snow falls on about two days a week, and the days lengthen by 24 minutes from the first week to the last.January in Karuizawa is cold: highs near 3°C, lows near -6°C. Rain or snow falls on about two days a week, and the days lengthen by 24 minutes from the first week to the last.

High
38°F3°Caverage
Low
21°F-6°Caverage
Wet days
2a week · 31% of days
Daylight
9h 59mon average

Is January a good time to visit Karuizawa?


January sits outside Karuizawa's best months, which run from June to September. Expect cold days and rain or snow on about two days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How January sits in the year

week by week

Temperature

Highs near 38°F in January, against 38°F to 82°F through the year.Highs near 3°C in January, against 3°C to 28°C through the year.

Chance of a wet day

31% of days in January, against 29% to 80% through the year.

Cloud cover

60% cover in January, against 56% to 73% through the year.

Daylight

9h 59m in January, against 9h 43m to 14h 36m through the year.

Week by week, lightly smoothed, with January shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side


  1. December44°7°low 27°low -3°2 wet days a weekRain on about two days a week.
  2. January38°3°low 21°low -6°2 wet days a weekRain on about two days a week.
  3. February39°4°low 20°low -7°2 wet days a weekRain on about two days a week.

Where Karuizawa sits, in January

Asia/Tokyo

this place
typical high in January 40°F4°C95°F35°C
Sunrise, mid-January
6:56 AMsets 4:52 PM
Above the sea
900 mupland
Latitude
36.3°Nnorthern hemisphere
Nearest of ours
Nozawa Onsen65 km north

The land around Karuizawa, shaded by its typical high in January, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Japan in January

high · low · wet days

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Karuizawa. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.