Karuizawa Weather Conditions
Current Temperature Level
33 °C
58 AQI
Air quality index is: Moderate
Last Updated: 2025-08-22 14:15 (Local Time)
MapKaruizawa
Karuizawa Weather Parameters
7 km/h
2 m/s
186° S
50 %
10 km
0.02 mm
1010 mb
UV Index4
Suggestions for
TodayKaruizawa22 Aug.
Heat Stroke• Avoid Outdoor 
Clothing• Breathable
Driving• Enjoy Driving
Sunscreen• ApplyTrending in Japan
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Karuizawa 10-Days Weather Forecast
Today
31°C
61 %Saturday
30°C64 %Sunday
31°C62 %Monday
30°C63 %Tuesday
29°C70 %Wednesday
29°C72 %Thursday
27°C75 %Friday
28°C70 %Saturday
29°C70 %Sunday
29°C71 %Patchy rain nearby
Occasional light rain is expected and humidity will be 61%, with winds at 15.5 km/h.36°C / 28°C
Humi.61 %
Prec.0.21 mm
Sunrise
05:04 AM13hrs 17min
Sunset
06:21 PMTime
Condition
Temp
Humidity
UV
Wind Speed & Dir.
12 AM
Partly Cloudy
30 °C
63 %
0
2.9 kmph / NE
Partly Cloudy 
Feels 32.6 °C
Cover 46 %
Visibility 10 km
1 AM
Partly Cloudy
29 °C
65 %
0
4 kmph / NNE
Partly Cloudy Feels 32.2 °C
Cover 27 %
Visibility 10 km
2 AM
Patchy rain nearby
29 °C
67 %
0
5.8 kmph / NNE
Patchy rain nearbyFeels 31.7 °C
Cover 81 %
Visibility 9 km
3 AM
Clear
28 °C
70 %
0
6.5 kmph / N
Clear Feels 31 °C
Cover 24 %
Visibility 10 km
4 AM
Clear
28 °C
72 %
0
7.6 kmph / N
Clear Feels 30.7 °C
Cover 24 %
Visibility 10 km
5 AM
Patchy rain nearby
28 °C
73 %
0
7.6 kmph / NNE
Patchy rain nearbyFeels 30.4 °C
Cover 71 %
Visibility 10 km
6 AM
Sunny
28 °C
73 %
0.2
7.6 kmph / N
SunnyFeels 30.4 °C
Cover 21 %
Visibility 10 km
7 AM
Sunny
28 °C
69 %
1
7.6 kmph / NNE
SunnyFeels 31.3 °C
Cover 20 %
Visibility 10 km
8 AM
Sunny
30 °C
63 %
2.6
6.1 kmph / NNE
SunnyFeels 33 °C
Cover 20 %
Visibility 10 km
9 AM
Sunny
31 °C
56 %
4.6
5.4 kmph / NNE
SunnyFeels 34.8 °C
Cover 25 %
Visibility 10 km
10 AM
Sunny
33 °C
49 %
6.6
2.5 kmph / ESE
SunnyFeels 37.1 °C
Cover 24 %
Visibility 10 km
11 AM
Partly Cloudy
35 °C
45 %
8.3
0.7 kmph / WSW
Partly Cloudy Feels 38.6 °C
Cover 48 %
Visibility 10 km
12 PM
Sunny
35 °C
42 %
8.4
6.1 kmph / SSW
SunnyFeels 39.4 °C
Cover 23 %
Visibility 10 km
1 PM
Patchy rain nearby
36 °C
41 %
6.6
7.6 kmph / SW
Patchy rain nearbyFeels 39.6 °C
Cover 74 %
Visibility 10 km
2 PM
Partly cloudy
33 °C
63 %
4.4
6.8 kmph / S
Partly cloudyFeels 39.1 °C
Cover 50 %
Visibility 10 km
3 PM
Partly Cloudy
34 °C
45 %
2.2
5.8 kmph / SSE
Partly Cloudy Feels 38.1 °C
Cover 45 %
Visibility 10 km
4 PM
Partly Cloudy
33 °C
50 %
0.9
11.5 kmph / S
Partly Cloudy Feels 36.7 °C
Cover 41 %
Visibility 10 km
5 PM
Partly Cloudy
32 °C
56 %
0.4
15.5 kmph / S
Partly Cloudy Feels 35.2 °C
Cover 30 %
Visibility 10 km
6 PM
Partly Cloudy
30 °C
62 %
0
14.8 kmph / S
Partly Cloudy Feels 34.2 °C
Cover 30 %
Visibility 10 km
7 PM
Clear
30 °C
67 %
0
13.7 kmph / S
Clear Feels 33.3 °C
Cover 22 %
Visibility 10 km
8 PM
Clear
29 °C
70 %
0
11.9 kmph / S
Clear Feels 32.9 °C
Cover 15 %
Visibility 10 km
9 PM
Clear
29 °C
71 %
0
10.1 kmph / S
Clear Feels 32.7 °C
Cover 18 %
Visibility 10 km
10 PM
Clear
29 °C
72 %
0
9 kmph / SSE
Clear Feels 32.6 °C
Cover 22 %
Visibility 10 km
11 PM
Clear
28 °C
73 %
0
7.6 kmph / SSE
Clear Feels 32.2 °C
Cover 16 %
Visibility 10 km
Today
31°C61 %Saturday
30°C64 %Sunday
31°C62 %Monday
30°C63 %Tuesday
29°C70 %Wednesday
29°C72 %Thursday
27°C75 %Friday
28°C70 %Saturday
29°C70 %Sunday
29°C71 %Temp34 °C
ConditionPartly Cloudy
Humidity45 %
Feels38.1 °C
Cover45 %
Visibility10 km
Wind Speed & Dir.5.8 kmph / SSE
UV2.2
Karuizawa 30-Days (August 2025) Weather Forecast
Sun.
Mon.
Tue.
Wed.
Thu.
Fri.
Sat.
1Fri.
31°25 °C
2Sat.
34°25 °C
3Sun.
36°27 °C
4Mon.
34°27 °C
5Tue.
35°28 °C
6Wed.
37°28 °C
7Thu.
34°27 °C
8Fri.
35°24 °C
9Sat.
34°24 °C
10Sun.
27°25 °C
11Mon.
28°27 °C
12Tue.
30°26 °C
13Wed.
32°25 °C
14Thu.
33°24 °C
15Fri.
33°26 °C
16Sat.
32°26 °C
17Sun.
32°26 °C
18Mon.
36°26 °C
19Tue.
33°26 °C
20Wed.
34°27 °C
21Thu.
37°27 °C
22Today
35°26 °C
23Sat.
35°27 °C
24Sun.
37°27 °C
25Mon.
36°28 °C
26Tue.
32°27 °C
27Wed.
32°24 °C
28Thu.
33°26 °C
29Fri.
33°26 °C
30Sat.
37°28 °C
31Sun.
35°28 °C
AugustWeather Overview
No. of days:
Sunny
9
Cloudy
4
Rainy
18
Snowy
0
The monthly weather averages in Karuizawa consist of 9 sunny days, 4 cloudy days, 18 rainy days, and 0 snowy days.
Japan's Hottest Cities - August 2025
1.
Suginami City, Japan
Partly cloudy
53%
7.1
6.5 kmph / S
2.
Nishitokyo, Japan
Partly cloudy
53%
7.4
3.6 kmph / SE
3.
Koganei, Japan
Partly cloudy
53%
7.3
3.6 kmph / SSE
4.
Minamishiro, Japan
Partly cloudy
53%
5.2
3.6 kmph / SSW
5.
Tokyo, Japan
Partly cloudy
53%
5.5
9.4 kmph / S
6.
Kasukabe, Japan
Partly cloudy
53%
5.2
3.6 kmph / SSW
7.
Chofugaoka, Japan
Partly cloudy
53%
5.5
7.2 kmph / S
8.
Honcho, Japan
Partly cloudy
53%
5.6
3.6 kmph / SSE
9.
Saitama, Japan
Partly cloudy
53%
5.4
3.6 kmph / SSE
10.
Fuchu, Japan
Partly cloudy
53%
5.5
3.6 kmph / SSE
Last Updated: 22 Aug 2025, 05:17 AM
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