Iruma, Saitama, Japan Climate Change Severity

71
Very High
The current climate change severity in Iruma is Very High, with a 43.7% 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 Nov. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Iruma 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), Iruma temperature has changed by around +10.9%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
7345
-38.3%
cloudyCloudy
8359
-28.9%
rainyRainy
148147
-0.6%
snowySnowy
10
-100%
mistyMisty
00
0%

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

Climate Change Indicators:

Over the past 15 years, Iruma has experienced measurable shifts in key climate parameters, contributing to the current severity score of 71 (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

71/100

Very High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Iruma experienced significant changes:

Temperature change of

+1.8 °C

Variation in annual rainfall

-39.01 %

Change in average humidity

-12.6 %

PM2.5 levels surged by

-17.01 %

Heatwave changed by

+34.2 day(s)

Coldwave changed by

-3.5 day(s)

Wind speeds changed by

+1.2 km/h

These indicators show a dramatic increase in volatility and worsening conditions. Iruma'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 Nov.

Iruma Weather Forecast 30 Days (December - January 2026)
Iruma, Saitama, Japan

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Mon. 8, Dec.
sunnySunny
Temperature Icon15°/7°
Humidity Icon43%
Wind Icon16km/h
Tue. 9, Dec.
partly cloudyPartly Cloudy
Temperature Icon11°/7°
Humidity Icon45%
Wind Icon14km/h
Wed. 10, Dec.
sunnySunny
Temperature Icon13°/6°
Humidity Icon46%
Wind Icon11km/h
Thu. 11, Dec.
cloudyCloudy
Temperature Icon13°/7°
Humidity Icon47%
Wind Icon10km/h
Fri. 12, Dec.
sunnySunny
Temperature Icon8°/4°
Humidity Icon36%
Wind Icon41km/h
Sat. 13, Dec.
sunnySunny
Temperature Icon8°/3°
Humidity Icon40%
Wind Icon16km/h
Sun. 14, Dec.
partly cloudyPartly Cloudy
Temperature Icon12°/5°
Humidity Icon49%
Wind Icon13km/h
Mon. 15, Dec.
sunnySunny
Temperature Icon12°/7°
Humidity Icon50%
Wind Icon21km/h
Tue. 16, Dec.
sunnySunny
Temperature Icon10°/5°
Humidity Icon48%
Wind Icon10km/h
Wed. 17, Dec.
overcastOvercast
Temperature Icon12°/5°
Humidity Icon49%
Wind Icon7km/h
Thu. 18, Dec.
sunnySunny
Temperature Icon13°/6°
Humidity Icon35%
Wind Icon7km/h
Fri. 19, Dec.
partly cloudyPartly Cloudy
Temperature Icon15°/8°
Humidity Icon45%
Wind Icon8km/h
Sat. 20, Dec.
moderate rainModerate rain
Temperature Icon10°/10°
Humidity Icon85%
Wind Icon21km/h
Sun. 21, Dec.
patchy rain possiblePatchy rain nearby
Temperature Icon15°/11°
Humidity Icon80%
Wind Icon17km/h
Mon. 22, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon11°/3°
Humidity Icon61%
Wind Icon17km/h
Tue. 23, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon10°/2°
Humidity Icon59%
Wind Icon16km/h
Wed. 24, Dec.
patchy rain possiblePatchy rain possible
Temperature Icon10°/2°
Humidity Icon57%
Wind Icon15km/h
Thu. 25, Dec.
heavy rain at timesHeavy rain at times
Temperature Icon10°/2°
Humidity Icon56%
Wind Icon15km/h
Fri. 26, Dec.
patchy rain possiblePatchy rain possible
Temperature Icon10°/1°
Humidity Icon53%
Wind Icon14km/h
Sat. 27, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon9°/1°
Humidity Icon54%
Wind Icon17km/h
Sun. 28, Dec.
moderate rain at timesModerate rain at times
Temperature Icon9°/0°
Humidity Icon53%
Wind Icon14km/h
Mon. 29, Dec.
heavy rain at timesHeavy rain at times
Temperature Icon9°/1°
Humidity Icon58%
Wind Icon13km/h
Tue. 30, Dec.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon10°/1°
Humidity Icon58%
Wind Icon16km/h
Wed. 31, Dec.
patchy rain possiblePatchy rain possible
Temperature Icon9°/0°
Humidity Icon56%
Wind Icon19km/h
Thu. 1, Jan.
patchy rain possiblePatchy rain possible
Temperature Icon9°/0°
Humidity Icon52%
Wind Icon17km/h
Fri. 2, Jan.
sunnySunny
Temperature Icon9°/0°
Humidity Icon54%
Wind Icon14km/h
Sat. 3, Jan.
patchy rain possiblePatchy rain possible
Temperature Icon8°/0°
Humidity Icon57%
Wind Icon16km/h
Sun. 4, Jan.
patchy rain possiblePatchy rain possible
Temperature Icon9°/0°
Humidity Icon55%
Wind Icon18km/h
Mon. 5, Jan.
patchy rain possiblePatchy rain possible
Temperature Icon9°/0°
Humidity Icon55%
Wind Icon16km/h
Tue. 6, Jan.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/0°
Humidity Icon56%
Wind Icon16km/h
Wed. 7, Jan.
moderate rain at timesModerate rain at times
Temperature Icon8°/0°
Humidity Icon57%
Wind Icon16km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 21, Dec.

15.2°C

Low will be onThu. 1, Jan.

-0.3°C

HumidityHumidity

High will be onSat. 20, Dec.

85%

Low will be onThu. 18, Dec.

35%

Wind SpeedWind Speed

High will be onFri. 12, Dec.

40.7km/h

Low will be onWed. 17, Dec.

6.8km/h

PrecipitationPrecipitation

High will be onSat. 20, Dec.

11.4mm

Low will be onSun. 14, Dec.

0.01mm

Ultraviolet IndexUV

High will be onFri. 19, Dec.

4

Low will be onTue. 9, Dec.

0.4

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