Iwakuni, Yamaguchi, Japan Climate Change Severity

38
Moderate
The current climate change severity in Iwakuni is Moderate, with a -7.9% 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 Jun. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Iwakuni 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), Iwakuni temperature has changed by around -5.7%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
3928
-28.2%
cloudyCloudy
5434
-37.03%
rainyRainy
6958
-15.9%
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, Iwakuni has experienced measurable improvements in key climate parameters, contributing to the current severity score of 38 (within the Moderate severity category). This suggests improving climate conditions compared to previous years. Here’s a breakdown of the specific changes observed:

Severity Score

38/100

Moderate

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Iwakuni experienced significant changes:

Temperature change of

-0.7 °C

Variation in annual rainfall

+1.6 %

Change in average humidity

-4.4 %

PM2.5 levels surged by

-16.3 %

Heatwave changed by

+2 day(s)

Coldwave changed by

+3.8 day(s)

Wind speeds changed by

+1.6 km/h

These indicators show reduced climate volatility, offering a valuable window to reinforce sustainable practices and strengthen long-term climate resilience. As the severity shifts toward Moderate, it is important to maintain momentum in climate adaptation efforts.

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

Iwakuni Weather Forecast 30 Days (July - August 2025)
Iwakuni, Yamaguchi, Japan

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Wed. 30, Jul.
sunnySunny
Temperature Icon31°/23°
Humidity Icon76%
Wind Icon10km/h
Thu. 31, Jul.
sunnySunny
Temperature Icon31°/23°
Humidity Icon76%
Wind Icon10km/h
Fri. 1, Aug.
sunnySunny
Temperature Icon31°/23°
Humidity Icon75%
Wind Icon10km/h
Sat. 2, Aug.
sunnySunny
Temperature Icon33°/23°
Humidity Icon67%
Wind Icon10km/h
Sun. 3, Aug.
sunnySunny
Temperature Icon31°/22°
Humidity Icon65%
Wind Icon9km/h
Mon. 4, Aug.
sunnySunny
Temperature Icon31°/24°
Humidity Icon76%
Wind Icon13km/h
Tue. 5, Aug.
sunnySunny
Temperature Icon30°/23°
Humidity Icon77%
Wind Icon14km/h
Wed. 6, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon31°/26°
Humidity Icon85%
Wind Icon16km/h
Thu. 7, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon30°/25°
Humidity Icon85%
Wind Icon12km/h
Fri. 8, Aug.
sunnySunny
Temperature Icon30°/23°
Humidity Icon80%
Wind Icon8km/h
Sat. 9, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon29°/24°
Humidity Icon85%
Wind Icon12km/h
Sun. 10, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon31°/23°
Humidity Icon80%
Wind Icon19km/h
Mon. 11, Aug.
sunnySunny
Temperature Icon29°/21°
Humidity Icon71%
Wind Icon9km/h
Tue. 12, Aug.
sunnySunny
Temperature Icon30°/23°
Humidity Icon76%
Wind Icon9km/h
Wed. 13, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon30°/25°
Humidity Icon81%
Wind Icon9km/h
Thu. 14, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon30°/24°
Humidity Icon81%
Wind Icon13km/h
Fri. 15, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon30°/25°
Humidity Icon83%
Wind Icon15km/h
Sat. 16, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon30°/24°
Humidity Icon83%
Wind Icon12km/h
Sun. 17, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon30°/24°
Humidity Icon83%
Wind Icon12km/h
Mon. 18, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon30°/24°
Humidity Icon81%
Wind Icon10km/h
Tue. 19, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon30°/24°
Humidity Icon82%
Wind Icon9km/h
Wed. 20, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon29°/24°
Humidity Icon83%
Wind Icon9km/h
Thu. 21, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon30°/24°
Humidity Icon85%
Wind Icon11km/h
Fri. 22, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon30°/24°
Humidity Icon83%
Wind Icon12km/h
Sat. 23, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon30°/24°
Humidity Icon81%
Wind Icon10km/h
Sun. 24, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon29°/24°
Humidity Icon83%
Wind Icon13km/h
Mon. 25, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon29°/24°
Humidity Icon83%
Wind Icon14km/h
Tue. 26, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon29°/23°
Humidity Icon82%
Wind Icon12km/h
Wed. 27, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon29°/23°
Humidity Icon80%
Wind Icon12km/h
Thu. 28, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon29°/23°
Humidity Icon81%
Wind Icon12km/h
Fri. 29, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon29°/23°
Humidity Icon83%
Wind Icon12km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSat. 2, Aug.

32.7°C

Low will be onMon. 11, Aug.

20.9°C

HumidityHumidity

High will be onWed. 6, Aug.

85%

Low will be onSun. 3, Aug.

65%

Wind SpeedWind Speed

High will be onSun. 10, Aug.

18.7km/h

Low will be onFri. 8, Aug.

7.9km/h

PrecipitationPrecipitation

High will be onThu. 14, Aug.

19.9mm

Low will be onTue. 5, Aug.

0.01mm

Ultraviolet IndexUV

High will be onMon. 4, Aug.

7

Low will be onThu. 31, Jul.

2.6

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