Climate · Karuizawa

Karuizawa in August

Warm and wet, as the days shorten.

Typical weather, averaged over 30 years

August in Karuizawa is warm: highs near 82°F, lows near 65°F. Rain falls on about six days a week, and the days shorten by 58 minutes from the first week to the last.August in Karuizawa is warm: highs near 28°C, lows near 18°C. Rain falls on about six days a week, and the days shorten by 58 minutes from the first week to the last.

High
82°F28°Caverage
Low
65°F18°Caverage
Wet days
6a week · 79% of days
Daylight
13h 29mon average

Is August a good time to visit Karuizawa?


Yes. August is one of Karuizawa's best months (June to September).

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 August sits in the year

week by week

Temperature

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

Chance of a wet day

79% of days in August, against 29% to 80% through the year.

Cloud cover

65% cover in August, against 56% to 73% through the year.

Daylight

13h 29m in August, against 9h 43m to 14h 36m through the year.

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

Either side


  1. July80°27°low 63°low 17°6 wet days a weekRain on about six days a week.
  2. August82°28°low 65°low 18°6 wet days a weekRain on about six days a week.
  3. September75°24°low 60°low 16°5 wet days a weekRain on about five days a week.

Where Karuizawa sits, in August

Asia/Tokyo

this place
typical high in August 40°F4°C95°F35°C
Sunrise, mid-August
5:03 AMsets 6:38 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 August, 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 August

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.