Karuizawa Weather Conditions
Current Temperature Level
23 °C
32 AQI
Air quality index is: Good
Last Updated: 2025-09-12 05:30 (Local Time)
MapKaruizawa
Karuizawa Weather Parameters
12 km/h
5 m/s
40° NE
75 %
10 km
0.1 mm
1017 mb
UV Index0
Suggestions for
ThursdayKaruizawa11 Sep.
Umbrella• Umbrella Needed
Clothing• Breathable
Driving• Avoid Driving
Sunscreen• ApplyTrending in Japan
India Floods 2025: How Waterlogging Is Creating a Hidden Air Pollution Crisis?
Karuizawa 10-Days Weather Forecast
Today
26°C
80 %Friday
24°C83 %Saturday
26°C78 %Sunday
28°C72 %Monday
29°C68 %Tuesday
29°C68 %Wednesday
29°C72 %Thursday
29°C65 %Friday
23°C69 %Saturday
25°C72 %Heavy rain
Constant heavy rain throughout the day with a high of 26 °C with humidity at 80%.30°C / 23°C
Humi.80 %
Prec.22.51 mm
Sunrise
05:19 AM12hrs 34min
Sunset
05:53 PMTime
Condition
Temp
Humidity
UV
Wind Speed & Dir.
12 AM
Clear
27 °C
83 %
0
21.6 kmph / S
Clear 
Feels 30.1 °C
Cover 11 %
Visibility 10 km
1 AM
Clear
27 °C
82 %
0
20.5 kmph / SSW
Clear Feels 29.9 °C
Cover 20 %
Visibility 10 km
2 AM
Clear
27 °C
82 %
0
19.8 kmph / SSW
Clear Feels 29.7 °C
Cover 17 %
Visibility 10 km
3 AM
Clear
26 °C
81 %
0
18.7 kmph / SSW
Clear Feels 29.4 °C
Cover 16 %
Visibility 10 km
4 AM
Clear
27 °C
80 %
0
16.9 kmph / SSW
Clear Feels 29.4 °C
Cover 16 %
Visibility 10 km
5 AM
Clear
26 °C
80 %
0
15.1 kmph / SSW
Clear Feels 29.2 °C
Cover 20 %
Visibility 10 km
6 AM
Sunny
27 °C
77 %
0.1
14.4 kmph / SSW
SunnyFeels 29.5 °C
Cover 13 %
Visibility 10 km
7 AM
Patchy rain nearby
28 °C
72 %
0.7
14.4 kmph / SW
Patchy rain nearbyFeels 30.4 °C
Cover 79 %
Visibility 9 km
8 AM
Patchy rain nearby
29 °C
67 %
2
11.5 kmph / SW
Patchy rain nearbyFeels 31.5 °C
Cover 83 %
Visibility 10 km
9 AM
Patchy light drizzle
30 °C
64 %
3.9
6.5 kmph / WSW
Patchy light drizzleFeels 32.8 °C
Cover 67 %
Visibility 5 km
10 AM
Light rain shower
29 °C
68 %
6
6.1 kmph / NNE
Light rain showerFeels 32.1 °C
Cover 99 %
Visibility 10 km
11 AM
Patchy rain nearby
26 °C
79 %
4.6
21.2 kmph / NE
Patchy rain nearbyFeels 28.7 °C
Cover 95 %
Visibility 10 km
12 PM
Light rain shower
27 °C
78 %
3.3
15.8 kmph / NE
Light rain showerFeels 29.9 °C
Cover 89 %
Visibility 10 km
1 PM
Patchy rain nearby
28 °C
75 %
5.1
13.7 kmph / ENE
Patchy rain nearbyFeels 30.7 °C
Cover 76 %
Visibility 10 km
2 PM
Light rain shower
29 °C
70 %
3.7
14 kmph / ENE
Light rain showerFeels 32.3 °C
Cover 71 %
Visibility 10 km
3 PM
Light rain shower
28 °C
75 %
1.4
12.2 kmph / ENE
Light rain showerFeels 30.8 °C
Cover 89 %
Visibility 10 km
4 PM
Light rain shower
26 °C
81 %
0.6
14.8 kmph / NE
Light rain showerFeels 28.7 °C
Cover 85 %
Visibility 10 km
5 PM
Moderate or heavy rain shower
25 °C
85 %
0.1
15.8 kmph / NE
Moderate or heavy rain showerFeels 27.4 °C
Cover 100 %
Visibility 7 km
6 PM
Moderate or heavy rain shower
24 °C
89 %
0
14.8 kmph / NE
Moderate or heavy rain showerFeels 26.7 °C
Cover 100 %
Visibility 7 km
7 PM
Moderate or heavy rain shower
24 °C
92 %
0
16.6 kmph / NE
Moderate or heavy rain showerFeels 26.1 °C
Cover 88 %
Visibility 7 km
8 PM
Moderate or heavy rain shower
24 °C
93 %
0
12.2 kmph / ENE
Moderate or heavy rain showerFeels 25.9 °C
Cover 96 %
Visibility 7 km
9 PM
Light rain shower
24 °C
94 %
0
14.4 kmph / ENE
Light rain showerFeels 25.9 °C
Cover 92 %
Visibility 10 km
10 PM
Patchy rain nearby
23 °C
92 %
0
13 kmph / NE
Patchy rain nearbyFeels 25.7 °C
Cover 88 %
Visibility 10 km
11 PM
Moderate or heavy rain with thunder
23 °C
100 %
0
11.2 kmph / NE
Moderate or heavy rain with thunderFeels 25.7 °C
Cover 75 %
Visibility 3 km
Today
26°C80 %Friday
24°C83 %Saturday
26°C78 %Sunday
28°C72 %Monday
29°C68 %Tuesday
29°C68 %Wednesday
29°C72 %Thursday
29°C65 %Friday
23°C69 %Saturday
25°C72 %Temp27 °C
ConditionClear
Humidity83 %
Feels30.1 °C
Cover11 %
Visibility10 km
Wind Speed & Dir.21.6 kmph / S
UV0
Karuizawa 30-Days (September 2025) Weather Forecast
Sun.
Mon.
Tue.
Wed.
Thu.
Fri.
Sat.
1Mon.
33°27 °C
2Tue.
33°27 °C
3Wed.
36°28 °C
4Thu.
28°25 °C
5Fri.
26°24 °C
6Sat.
32°23 °C
7Sun.
31°25 °C
8Mon.
35°25 °C
9Tue.
33°26 °C
10Wed.
30°26 °C
11Thu.
30°23 °C
12Today
27°23 °C
13Sat.
29°23 °C
14Sun.
32°26 °C
15Mon.
33°26 °C
16Tue.
34°26 °C
17Wed.
31°26 °C
18Thu.
32°26 °C
19Fri.
30°26 °C
20Sat.
21°18 °C
21Sun.
22°18 °C
22Mon.
28°21 °C
23Tue.
22°20 °C
24Wed.
23°20 °C
25Thu.
25°19 °C
26Fri.
25°19 °C
27Sat.
24°19 °C
28Sun.
26°19 °C
29Mon.
25°19 °C
30Tue.
25°19 °C
SeptemberWeather Overview
No. of days:
Sunny
5
Cloudy
3
Rainy
22
Snowy
0
The monthly weather averages in Karuizawa consist of 5 sunny days, 3 cloudy days, 22 rainy days, and 0 snowy days.
Japan's Hottest Cities - September 2025
1.
Ube, Japan
Partly cloudy
84%
0
6.5 kmph / SE
2.
Nishihara, Japan
Clear
84%
0
7.2 kmph / SE
3.
Yamaguchi, Japan
Partly cloudy
84%
0
8.3 kmph / SE
4.
Naha, Japan
Clear
84%
0
6.8 kmph / SE
5.
Hagi, Japan
Partly cloudy
84%
0
7.6 kmph / SE
6.
Hofu, Japan
Partly cloudy
84%
0
14 kmph / ESE
7.
Itoman, Japan
Clear
84%
0
7.2 kmph / SE
8.
Nagato, Japan
Partly cloudy
84%
0
6.5 kmph / SE
9.
Nago, Japan
Clear
89%
0
5.8 kmph / SSE
10.
Kamigoto, Japan
Patchy light drizzle
82%
0
19.1 kmph / SSE
Last Updated: 11 Sept 2025, 08:48 PM
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