Karuizawa weather
At 11:00 AM local time it was clear and 13°C (55°F). Light rain for 1 of the next 24 hours (under 1 mm/h, 0.1 mm total) — cloudy, but fine to be out. Best months for weather: May–Jun, Aug–Sep. Karuizawa sits 956 m (3,137 ft) above sea level, which keeps it cooler than the coast. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Karuizawa, Nagano, Japan.
Current conditions
- Clouds
- 18%
- Chance of rain
- 0%
- Rain
- 0.0 mm/h
Hourly Forecast
Light rain for 1 of the next 24 hours (under 1 mm/h, 0.1 mm total) — cloudy, but fine to be out
Daily Forecast
Best Time to Visit
Peak season May–Jun, Aug–SepOff season Nov–Mar
About Karuizawa weather
Is it raining in Karuizawa right now?
No. It’s clear and 13° right now. Light rain for 1 of the next 24 hours (under 1 mm/h, 0.1 mm total) — cloudy, but fine to be out.
What’s the weather like in Karuizawa this week?
Over the next 7 days, expect highs of 10–19° and lows of -2–9°. Rain is likely on 2 of 7 days (Monday, Thursday). The driest day looks like Sunday.
Has it been raining in Karuizawa lately?
In the past 7 days, Karuizawa had 3 rainy days and 40.7 mm of rain in total.
What should I pack for Karuizawa?
For the coming week, bring an umbrella or rain jacket and a warm winter coat.
Karuizawa weather by month
When is the best time to visit Karuizawa?
Based on weather alone, the best time to visit Karuizawa is May–Jun, Aug–Sep, according to NASA's 2001–2025 climate averages. Nov–Mar tends to be the least pleasant. Average highs run from -2°C (29°F) in January to 25°C (78°F) in August.
What is the rainiest month in Karuizawa?
July is the wettest month, with about 199 mm (7.8 in) of rain on average. February is the driest, with about 60 mm (2.4 in).
What is the hottest month in Karuizawa?
August is the warmest, with average highs of 25°C (78°F) and lows of 17°C (62°F). January is the coolest, with highs of -2°C (29°F) and lows of -8°C (17°F).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months