Otsu, Shiga, Japan Climate Change Severity

43
High
The current climate change severity in Otsu is High, with a 7.7% improvement in the climate score compared to last 15 years. This suggests improved conditions, with more favorable environmental indicators and a reduction in negative impacts.
Data: Jan. to Aug. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Otsu Weather Condition Changes (Historic Vs 2025)

2025
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2025

Over the past 15 year(s), Otsu temperature has changed by around +4.1%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Aug. (Historical Vs 2025)

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
2816
-42.8%
cloudyCloudy
5438
-29.6%
rainyRainy
12198
-19.008%
snowySnowy
10
-100%
mistyMisty
02
100%

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

Climate Change Indicators:

Over the past 15 years, Otsu has experienced measurable shifts in key climate parameters, contributing to the current severity score of 43 (within the High severity category). While the score remains High, certain factors have improved over time. Here’s a breakdown of the specific changes observed:

Severity Score

43/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Otsu experienced significant changes:

Temperature change of

+0.6 °C

Variation in annual rainfall

-29.01 %

Change in average humidity

-7.8 %

PM2.5 levels surged by

-5.6 %

Heatwave changed by

+4.6 day(s)

Coldwave changed by

-1.3 day(s)

Wind speeds changed by

+1.5 km/h

These indicators show improvement in key parametes of climate, but Otsu remains in the High severity category. Continuous focus on climate resilience is necessary to avoid further worsening and ensure sustainability.

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

Otsu Weather Forecast 30 Days (September - October 2025)
Otsu, Shiga, Japan

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Sun. 28, Sep.
patchy rain possiblePatchy rain nearby
Temperature Icon28°/18°
Humidity Icon74%
Wind Icon13km/h
Mon. 29, Sep.
moderate rainModerate rain
Temperature Icon25°/18°
Humidity Icon80%
Wind Icon19km/h
Tue. 30, Sep.
patchy rain possiblePatchy rain nearby
Temperature Icon27°/18°
Humidity Icon70%
Wind Icon10km/h
Wed. 1, Oct.
moderate rainModerate rain
Temperature Icon27°/18°
Humidity Icon76%
Wind Icon10km/h
Thu. 2, Oct.
sunnySunny
Temperature Icon26°/18°
Humidity Icon68%
Wind Icon10km/h
Fri. 3, Oct.
moderate rainModerate rain
Temperature Icon19°/17°
Humidity Icon86%
Wind Icon12km/h
Sat. 4, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon24°/18°
Humidity Icon89%
Wind Icon9km/h
Sun. 5, Oct.
sunnySunny
Temperature Icon26°/18°
Humidity Icon78%
Wind Icon8km/h
Mon. 6, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon25°/20°
Humidity Icon79%
Wind Icon4km/h
Tue. 7, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon26°/19°
Humidity Icon82%
Wind Icon12km/h
Wed. 8, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/15°
Humidity Icon84%
Wind Icon22km/h
Thu. 9, Oct.
partly cloudyPartly Cloudy
Temperature Icon21°/13°
Humidity Icon72%
Wind Icon6km/h
Fri. 10, Oct.
sunnySunny
Temperature Icon19°/14°
Humidity Icon66%
Wind Icon19km/h
Sat. 11, Oct.
partly cloudyPartly Cloudy
Temperature Icon21°/12°
Humidity Icon63%
Wind Icon7km/h
Sun. 12, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/14°
Humidity Icon78%
Wind Icon14km/h
Mon. 13, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/14°
Humidity Icon78%
Wind Icon12km/h
Tue. 14, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/13°
Humidity Icon77%
Wind Icon11km/h
Wed. 15, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/14°
Humidity Icon78%
Wind Icon11km/h
Thu. 16, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/13°
Humidity Icon77%
Wind Icon12km/h
Fri. 17, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/13°
Humidity Icon80%
Wind Icon12km/h
Sat. 18, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/12°
Humidity Icon76%
Wind Icon10km/h
Sun. 19, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/12°
Humidity Icon78%
Wind Icon12km/h
Mon. 20, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/13°
Humidity Icon77%
Wind Icon13km/h
Tue. 21, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/13°
Humidity Icon77%
Wind Icon13km/h
Wed. 22, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/13°
Humidity Icon78%
Wind Icon13km/h
Thu. 23, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/13°
Humidity Icon80%
Wind Icon16km/h
Fri. 24, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon19°/12°
Humidity Icon77%
Wind Icon12km/h
Sat. 25, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon19°/12°
Humidity Icon79%
Wind Icon14km/h
Sun. 26, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/11°
Humidity Icon77%
Wind Icon13km/h
Mon. 27, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon19°/11°
Humidity Icon76%
Wind Icon13km/h
Tue. 28, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/11°
Humidity Icon76%
Wind Icon11km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 28, Sep.

28°C

Low will be onMon. 27, Oct.

10.8°C

HumidityHumidity

High will be onSat. 4, Oct.

89%

Low will be onSat. 11, Oct.

63%

Wind SpeedWind Speed

High will be onWed. 8, Oct.

22km/h

Low will be onMon. 6, Oct.

3.6km/h

PrecipitationPrecipitation

High will be onWed. 22, Oct.

13.2mm

Low will be onFri. 10, Oct.

0.04mm

Ultraviolet IndexUV

High will be onSun. 5, Oct.

6

Low will be onMon. 29, Sep.

0.6

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