Kosai, Shizuoka, Japan Climate Change Severity

67
Very High
The current climate change severity in Kosai is Very High, with a 45.02% worsening in the climate score compared to last 15 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Oct. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Kosai 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), Kosai temperature has changed by around +7.3%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
6844
-35.2%
cloudyCloudy
6865
-4.4%
rainyRainy
140128
-8.5%
snowySnowy
00
0%
mistyMisty
00
0%

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

Climate Change Indicators:

Over the past 15 years, Kosai has experienced measurable shifts in key climate parameters, contributing to the current severity score of 67 (within the Very High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

67/100

Very High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Kosai experienced significant changes:

Temperature change of

+1.2 °C

Variation in annual rainfall

-26.9 %

Change in average humidity

-10.2 %

PM2.5 levels surged by

-6.2 %

Heatwave changed by

+20.9 day(s)

Coldwave changed by

-3.4 day(s)

Wind speeds changed by

-0.8 km/h

These indicators show a dramatic increase in volatility and worsening conditions. Kosai's Very High severity status requires urgent and immediate adaptation and mitigation strategies, particularly focused on managing extreme weather events, improving air quality, and ensuring water resources are adequate for the population.

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

Kosai Weather Forecast 30 Days (November - December 2025)
Kosai, Shizuoka, Japan

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Fri. 7, Nov.
sunnySunny
Temperature Icon21°/14°
Humidity Icon51%
Wind Icon23km/h
Sat. 8, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon19°/13°
Humidity Icon59%
Wind Icon19km/h
Sun. 9, Nov.
heavy rainHeavy rain
Temperature Icon19°/15°
Humidity Icon76%
Wind Icon15km/h
Mon. 10, Nov.
sunnySunny
Temperature Icon18°/11°
Humidity Icon61%
Wind Icon40km/h
Tue. 11, Nov.
sunnySunny
Temperature Icon17°/9°
Humidity Icon48%
Wind Icon29km/h
Wed. 12, Nov.
sunnySunny
Temperature Icon17°/10°
Humidity Icon52%
Wind Icon19km/h
Thu. 13, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon15°/13°
Humidity Icon71%
Wind Icon21km/h
Fri. 14, Nov.
sunnySunny
Temperature Icon18°/12°
Humidity Icon54%
Wind Icon27km/h
Sat. 15, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon19°/12°
Humidity Icon64%
Wind Icon9km/h
Sun. 16, Nov.
moderate rainModerate rain
Temperature Icon16°/16°
Humidity Icon90%
Wind Icon12km/h
Mon. 17, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon16°/13°
Humidity Icon79%
Wind Icon35km/h
Tue. 18, Nov.
sunnySunny
Temperature Icon11°/8°
Humidity Icon58%
Wind Icon40km/h
Wed. 19, Nov.
sunnySunny
Temperature Icon13°/7°
Humidity Icon56%
Wind Icon28km/h
Thu. 20, Nov.
sunnySunny
Temperature Icon16°/8°
Humidity Icon55%
Wind Icon21km/h
Fri. 21, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/9°
Humidity Icon65%
Wind Icon22km/h
Sun. 23, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/10°
Humidity Icon70%
Wind Icon26km/h
Mon. 24, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/9°
Humidity Icon67%
Wind Icon24km/h
Tue. 25, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/9°
Humidity Icon69%
Wind Icon22km/h
Wed. 26, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/10°
Humidity Icon70%
Wind Icon23km/h
Thu. 27, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/10°
Humidity Icon69%
Wind Icon22km/h
Fri. 28, Nov.
heavy rain at timesHeavy rain at times
Temperature Icon15°/9°
Humidity Icon66%
Wind Icon26km/h
Sat. 29, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/9°
Humidity Icon66%
Wind Icon25km/h
Sun. 30, Nov.
heavy rain at timesHeavy rain at times
Temperature Icon15°/8°
Humidity Icon67%
Wind Icon24km/h
Mon. 1, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/8°
Humidity Icon69%
Wind Icon26km/h
Tue. 2, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon14°/7°
Humidity Icon69%
Wind Icon26km/h
Wed. 3, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/8°
Humidity Icon67%
Wind Icon26km/h
Thu. 4, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/8°
Humidity Icon69%
Wind Icon29km/h
Fri. 5, Dec.
moderate rain at timesModerate rain at times
Temperature Icon13°/7°
Humidity Icon67%
Wind Icon27km/h
Sat. 6, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/7°
Humidity Icon66%
Wind Icon27km/h
Sun. 7, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon12°/7°
Humidity Icon66%
Wind Icon26km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onFri. 7, Nov.

21.1°C

Low will be onWed. 19, Nov.

6.7°C

HumidityHumidity

High will be onSun. 16, Nov.

90%

Low will be onTue. 11, Nov.

48%

Wind SpeedWind Speed

High will be onMon. 10, Nov.

40km/h

Low will be onSat. 15, Nov.

9.4km/h

PrecipitationPrecipitation

High will be onSun. 9, Nov.

36.5mm

Low will be onSat. 8, Nov.

0.1mm

Ultraviolet IndexUV

High will be onWed. 12, Nov.

4

Low will be onSun. 9, Nov.

0.3

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