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Weather Forecast for Nagano

Nagano, Japan

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Overcast

Current Weather - Nagano: 18°C

Nagano, Japan

Overcast

Feels like 20°C

Wind

4 km/h SSE

Humidity

86%

Pressure

1015 mb

UV Index

3

Visibility

10 km
Mist

Mist

Friday, August 21, 2026

High

25°C

Low

18°C

Rain Chance

86%

Hourly Forecast

Mist 21°C
02:00
Mist 21°C
03:00
Mist 21°C
04:00
Mist 20°C
05:00
Mist 21°C
06:00
Overcast 18°C
07:00
Overcast 19°C
08:00
Overcast 18°C
09:00
Light rain shower 21°C
10:00
Light rain shower 23°C
11:00
Patchy rain nearby 20°C
12:00
Light rain shower 24°C
13:00
Patchy rain nearby 25°C
14:00
Patchy rain nearby 24°C
15:00
Light rain shower 23°C
16:00
Light rain shower 22°C
17:00
Light rain shower 25°C
18:00
Light rain shower 23°C
19:00
Patchy rain nearby 23°C
20:00
Patchy rain nearby 22°C
21:00
Mist 21°C
22:00
Mist 21°C
23:00
Aug 22

Day Statistics

Maximum Wind

6 km/h

Humidity

87%

Precipitation

9 mm

UV Index

8

Visibility

7 km

Rain Chance

86%

Snow Chance

0%

Sun & Moon

Sunrise

05:11 AM

Sunset

06:31 PM

Moonrise

02:08 PM

Moonset

11:25 PM

Moon Phase

First Quarter

Moon Illumination

69%

Air Quality

PM2.5

5.5

μg/m³

PM10

5.6

μg/m³

NO₂

7.9

μg/m³

O₃

82.3

μg/m³

SO₂

1.5

μg/m³

CO

170.9

μg/m³

US EPA Index: 1 GB DEFRA Index: 1

Solar Radiation Data

Shortwave Radiation

119.38

Diffuse Radiation

61.2

DNI

383.25

GTI

138.87