Suwa, Nagano, Japan Climate Change Severity

33
Moderate
The current climate change severity in Suwa is Moderate, with a 26.4% improvement in the climate score compared to last 16 years. This suggests improved conditions, with more favorable environmental indicators and a reduction in negative impacts.
Data: Jan. to Jul. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Suwa Weather Condition Changes (Historic Vs 2026)

2026
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2026

Over the past 16 year(s), Suwa temperature has changed by around +6.7%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jul. (Historical Vs 2026)

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
3840
5.2%
cloudyCloudy
5720
-64.9%
rainyRainy
8795
9.1%
snowySnowy
822
175%
mistyMisty
06
100%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 16 years, Suwa has experienced measurable improvements in key climate parameters, contributing to the current severity score of 33 (within the Moderate severity category). This suggests improving climate conditions compared to previous years. Here’s a breakdown of the specific changes observed:

Severity Score

33/100

Moderate

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, Suwa experienced significant changes:

Temperature change of

+0.55 °C

Variation in annual rainfall

+12.33 %

Change in average humidity

-3.84 %

PM2.5 levels surged by

+3.39 %

Heatwave changed by

0 Day

Coldwave changed by

-1 Day

Wind speeds changed by

-0.98 km/h

These indicators show reduced climate volatility, offering a valuable window to reinforce sustainable practices and strengthen long-term climate resilience. As the severity shifts toward Moderate, it is important to maintain momentum in climate adaptation efforts.

Check how we calculate Climate Change Severity
Based on data from Jan. to Jul.

Suwa Weather Forecast 30 Days (August - September 2026)
Suwa, Nagano, Japan

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Sun. 2, Aug.
fogFog
Temperature Icon32°/16°
Humidity Icon83%
Wind Icon8.3km/h
Mon. 3, Aug.
fogFog
Temperature Icon26°/20°
Humidity Icon91%
Wind Icon6.8km/h
Tue. 4, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon29°/14°
Humidity Icon83%
Wind Icon6.8km/h
Wed. 5, Aug.
sunnySunny
Temperature Icon31°/12°
Humidity Icon74%
Wind Icon7.9km/h
Thu. 6, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon30°/15°
Humidity Icon82%
Wind Icon9km/h
Fri. 7, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon31°/15°
Humidity Icon78%
Wind Icon9km/h
Sat. 8, Aug.
mistMist
Temperature Icon30°/15°
Humidity Icon75%
Wind Icon8.6km/h
Sun. 9, Aug.
sunnySunny
Temperature Icon28°/14°
Humidity Icon72%
Wind Icon8.6km/h
Mon. 10, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/18°
Humidity Icon82%
Wind Icon9.9km/h
Tue. 11, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/18°
Humidity Icon81%
Wind Icon9.6km/h
Wed. 12, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/18°
Humidity Icon82%
Wind Icon8.6km/h
Thu. 13, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/18°
Humidity Icon83%
Wind Icon9km/h
Fri. 14, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/18°
Humidity Icon83%
Wind Icon8.7km/h
Sat. 15, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/18°
Humidity Icon84%
Wind Icon9.3km/h
Sun. 16, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/18°
Humidity Icon84%
Wind Icon10.7km/h
Mon. 17, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/17°
Humidity Icon82%
Wind Icon9.4km/h
Tue. 18, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/17°
Humidity Icon81%
Wind Icon8.2km/h
Wed. 19, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/17°
Humidity Icon81%
Wind Icon7.1km/h
Thu. 20, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/17°
Humidity Icon82%
Wind Icon7.8km/h
Fri. 21, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/17°
Humidity Icon83%
Wind Icon7.9km/h
Sat. 22, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/17°
Humidity Icon81%
Wind Icon8.2km/h
Sun. 23, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/17°
Humidity Icon82%
Wind Icon8.8km/h
Mon. 24, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/17°
Humidity Icon81%
Wind Icon9km/h
Tue. 25, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon26°/17°
Humidity Icon84%
Wind Icon8.3km/h
Wed. 26, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/16°
Humidity Icon82%
Wind Icon8.2km/h
Thu. 27, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon26°/16°
Humidity Icon83%
Wind Icon7.2km/h
Fri. 28, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon26°/16°
Humidity Icon83%
Wind Icon7.7km/h
Sat. 29, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/16°
Humidity Icon82%
Wind Icon8.1km/h
Sun. 30, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon26°/17°
Humidity Icon84%
Wind Icon9.1km/h
Mon. 31, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon26°/16°
Humidity Icon83%
Wind Icon10.1km/h
Tue. 1, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon25°/16°
Humidity Icon83%
Wind Icon9.3km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 2, Aug.

32°C

Low will be onWed. 5, Aug.

12°C

HumidityHumidity

High will be onMon. 3, Aug.

91%

Low will be onSun. 9, Aug.

72%

Wind SpeedWind Speed

High will be onSun. 16, Aug.

10.7km/h

Low will be onMon. 3, Aug.

6.8km/h

PrecipitationPrecipitation

High will be onFri. 14, Aug.

13.07mm

Low will be onWed. 5, Aug.

0.07mm

Ultraviolet IndexUV

High will be onTue. 4, Aug.

10.7

Low will be onMon. 10, Aug.

5

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