Climate · Karuizawa

Karuizawa in May

Mild and wet, as the days lengthen.

Typical weather, averaged over 30 years

May in Karuizawa is mild: highs near 68°F, lows near 47°F. Rain falls on about four days a week, more often as the month goes on, and the days lengthen by 44 minutes from the first week to the last.May in Karuizawa is mild: highs near 20°C, lows near 8°C. Rain falls on about four days a week, more often as the month goes on, and the days lengthen by 44 minutes from the first week to the last.

High
68°F20°Caverage
Low
47°F8°Caverage
Wet days
4a week · 54% of days
Daylight
14h 05mon average

Is May a good time to visit Karuizawa?


A good month, just outside Karuizawa's best months, which run from 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 May sits in the year

week by week

Temperature

Highs near 68°F in May, against 38°F to 82°F through the year.Highs near 20°C in May, against 3°C to 28°C through the year.

Chance of a wet day

54% of days in May, against 29% to 80% through the year.

Cloud cover

62% cover in May, against 56% to 73% through the year.

Daylight

14h 05m in May, against 9h 43m to 14h 36m through the year.

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

Either side


  1. April58°14°low 37°low 3°3 wet days a weekRain on about three days a week.
  2. May68°20°low 47°low 8°4 wet days a weekRain on about four days a week.
  3. June73°23°low 56°low 13°5 wet days a weekRain on about five days a week.

Where Karuizawa sits, in May

Asia/Tokyo

this place
typical high in May 40°F4°C95°F35°C
Sunrise, mid-May
4:40 AMsets 6:44 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 May, 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 May

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.