Koganei, Tokyo, Japan Climate Change Severity
Very High
Koganei Weather Condition Changes (Historic Vs 2025)
Over the past 15 year(s), Koganei temperature has changed by around +9.7%, 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, Koganei 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
From 2010 to 2025, Koganei experienced significant changes:
Temperature change of
+1.4 °C
Variation in annual rainfall
-24.5 %
Change in average humidity
-12.08 %
PM2.5 levels surged by
+100 %
Heatwave changed by
+31.2 day(s)
Coldwave changed by
-1.9 day(s)
Wind speeds changed by
+0.3 km/h
These indicators show a dramatic increase in volatility and worsening conditions. Koganei'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.
Koganei Weather Forecast 30 Days (August - September 2025)Koganei, Tokyo, Japan
Temperature
humi.
Wind SpeedPatchy rain nearby37°/29°56%22km/hPatchy rain nearby35°/28°60%26km/hPatchy rain nearby36°/27°56%27km/hPatchy rain nearby32°/27°61%21km/h
Overcast 31°/26°66%19km/hSunny35°/28°61%18km/hSunny36°/29°53%22km/hSunny37°/29°54%20km/h
Moderate rain33°/29°66%16km/hPatchy rain nearby33°/27°70%26km/hPatchy rain nearby25°/24°73%19km/hModerate rain23°/21°82%18km/hPatchy rain nearby23°/21°82%17km/hModerate rain23°/22°90%20km/h
Heavy rain28°/23°86%58km/h
Moderate or heavy rain shower29°/23°71%21km/hModerate or heavy rain shower29°/23°69%17km/hModerate or heavy rain shower29°/23°69%15km/hModerate or heavy rain shower29°/23°67%15km/hModerate or heavy rain shower28°/22°69%15km/hModerate or heavy rain shower27°/22°70%14km/hModerate or heavy rain shower27°/21°71%17km/hModerate or heavy rain shower27°/22°71%17km/hModerate or heavy rain shower28°/22°70%22km/hModerate or heavy rain shower27°/21°68%18km/hModerate or heavy rain shower26°/20°68%19km/hModerate or heavy rain shower26°/20°68%18km/hModerate or heavy rain shower27°/20°68%17km/hModerate or heavy rain shower25°/19°75%19km/hModerate or heavy rain shower25°/19°71%19km/hHighest & Lowest Weather Forecasts
TemperatureHumidityWind Speed
Precipitation
UV
