Isahaya, Nagasaki, Japan Climate Change Severity

43
High
The current climate change severity in Isahaya is High, with a 4.3% 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 Sep. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Isahaya 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), Isahaya temperature has changed by around -2.4%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
4439
-11.3%
cloudyCloudy
6742
-37.3%
rainyRainy
13495
-29.1%
snowySnowy
00
0%
mistyMisty
01
100%

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

Climate Change Indicators:

Over the past 15 years, Isahaya has experienced measurable shifts in key climate parameters, contributing to the current severity score of 43 (within the High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

43/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Isahaya experienced significant changes:

Temperature change of

-0.4 °C

Variation in annual rainfall

-19.07 %

Change in average humidity

-3.01 %

PM2.5 levels surged by

-26.4 %

Heatwave changed by

+0.5 day(s)

Coldwave changed by

+8.4 day(s)

Wind speeds changed by

-0.7 km/h

These indicators show that Isahaya is experiencing a more volatile and extreme climate, reinforcing the need for urgent intervention to mitigate risks. As the severity score rises, focus must shift to adaptation and emergency preparedness.

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

Isahaya Weather Forecast 30 Days (October - November 2025)
Isahaya, Nagasaki, Japan

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Sat. 18, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon27°/21°
Humidity Icon81%
Wind Icon13km/h
Sun. 19, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon27°/21°
Humidity Icon82%
Wind Icon13km/h
Mon. 20, Oct.
partly cloudyPartly Cloudy
Temperature Icon25°/19°
Humidity Icon70%
Wind Icon18km/h
Tue. 21, Oct.
partly cloudyPartly Cloudy
Temperature Icon22°/17°
Humidity Icon73%
Wind Icon19km/h
Wed. 22, Oct.
partly cloudyPartly Cloudy
Temperature Icon19°/17°
Humidity Icon71%
Wind Icon18km/h
Thu. 23, Oct.
sunnySunny
Temperature Icon23°/15°
Humidity Icon67%
Wind Icon21km/h
Fri. 24, Oct.
sunnySunny
Temperature Icon22°/15°
Humidity Icon69%
Wind Icon19km/h
Sat. 25, Oct.
partly cloudyPartly Cloudy
Temperature Icon24°/17°
Humidity Icon71%
Wind Icon12km/h
Sun. 26, Oct.
partly cloudyPartly Cloudy
Temperature Icon22°/16°
Humidity Icon71%
Wind Icon14km/h
Mon. 27, Oct.
partly cloudyPartly Cloudy
Temperature Icon20°/14°
Humidity Icon57%
Wind Icon16km/h
Tue. 28, Oct.
partly cloudyPartly Cloudy
Temperature Icon19°/13°
Humidity Icon55%
Wind Icon19km/h
Wed. 29, Oct.
sunnySunny
Temperature Icon21°/12°
Humidity Icon60%
Wind Icon11km/h
Thu. 30, Oct.
sunnySunny
Temperature Icon21°/13°
Humidity Icon54%
Wind Icon9km/h
Fri. 31, Oct.
sunnySunny
Temperature Icon21°/16°
Humidity Icon62%
Wind Icon16km/h
Sat. 1, Nov.
sunnySunny
Temperature Icon22°/14°
Humidity Icon60%
Wind Icon17km/h
Sun. 2, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/14°
Humidity Icon72%
Wind Icon16km/h
Mon. 3, Nov.
patchy rain possiblePatchy rain possible
Temperature Icon20°/14°
Humidity Icon68%
Wind Icon16km/h
Tue. 4, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/13°
Humidity Icon69%
Wind Icon14km/h
Wed. 5, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/13°
Humidity Icon67%
Wind Icon13km/h
Thu. 6, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/14°
Humidity Icon70%
Wind Icon14km/h
Fri. 7, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/15°
Humidity Icon71%
Wind Icon16km/h
Sat. 8, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/14°
Humidity Icon72%
Wind Icon17km/h
Sun. 9, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon19°/14°
Humidity Icon72%
Wind Icon18km/h
Mon. 10, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/13°
Humidity Icon75%
Wind Icon20km/h
Wed. 12, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/13°
Humidity Icon71%
Wind Icon19km/h
Thu. 13, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/13°
Humidity Icon73%
Wind Icon18km/h
Fri. 14, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/12°
Humidity Icon72%
Wind Icon17km/h
Sat. 15, Nov.
patchy rain possiblePatchy rain possible
Temperature Icon17°/12°
Humidity Icon69%
Wind Icon16km/h
Sun. 16, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/12°
Humidity Icon71%
Wind Icon14km/h
Mon. 17, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/12°
Humidity Icon73%
Wind Icon18km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 19, Oct.

27°C

Low will be onWed. 29, Oct.

11.8°C

HumidityHumidity

High will be onSun. 19, Oct.

82%

Low will be onThu. 30, Oct.

54%

Wind SpeedWind Speed

High will be onThu. 23, Oct.

20.5km/h

Low will be onThu. 30, Oct.

9.4km/h

PrecipitationPrecipitation

High will be onMon. 17, Nov.

14.4mm

Low will be onSat. 25, Oct.

0.01mm

Ultraviolet IndexUV

High will be onWed. 22, Oct.

5

Low will be onTue. 21, Oct.

1

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