Kosai, Shizuoka, Japan Climate Change Severity
Very High
Kosai Weather Condition Changes (Historic Vs 2025)
Over the past 15 year(s), Kosai temperature has changed by around +7.06%, and has experienced notable climate changes.
Comparison of Weather Condition (Historic Vs 2025)
HistoricDays
Year 2025Days
Change
Sunny
Cloudy
Rainy
Snowy
MistyDisclaimer: 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 62 (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
62/100
Very High
From 2010 to 2025, Kosai experienced significant changes:
Temperature change of
+1.2 °C
Variation in annual rainfall
-24.6 %
Change in average humidity
-10.9 %
PM2.5 levels surged by
-7.6 %
Heatwave changed by
+19.5 day(s)
Coldwave changed by
-3.4 day(s)
Wind speeds changed by
-0.5 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.
Kosai Weather Forecast 30 Days (October - November 2025)Kosai, Shizuoka, Japan
Temperature
humi.
Wind Speed
Moderate rain21°/14°61%45km/hModerate rain20°/15°75%39km/hSunny19°/13°56%32km/hSunny19°/12°55%30km/hPatchy rain nearby20°/16°66%21km/hPatchy rain nearby19°/16°80%9km/hModerate rain16°/14°89%15km/hPatchy rain nearby19°/12°74%12km/h
Partly Cloudy 21°/16°69%14km/h
Overcast 21°/16°60%16km/hSunny20°/14°49%29km/hPatchy rain nearby19°/15°64%9km/hSunny20°/14°64%12km/hOvercast 16°/12°57%10km/h
Moderate or heavy rain shower17°/11°70%25km/hModerate or heavy rain shower17°/11°69%25km/hPatchy rain possible17°/10°65%24km/hModerate or heavy rain shower17°/11°68%21km/hModerate or heavy rain shower16°/10°68%26km/hModerate or heavy rain shower16°/10°67%25km/hModerate or heavy rain shower16°/10°68%25km/hModerate or heavy rain shower16°/9°65%22km/hModerate or heavy rain shower16°/10°70%26km/hModerate or heavy rain shower15°/9°67%24km/hModerate or heavy rain shower16°/9°69%22km/hModerate or heavy rain shower16°/10°70%23km/hModerate or heavy rain shower15°/10°69%22km/h
Heavy rain at times15°/9°66%26km/hModerate or heavy rain shower15°/9°66%25km/hHeavy rain at times15°/8°67%24km/hHighest & Lowest Weather Forecasts
TemperatureHumidityWind Speed
Precipitation
UV
