Londonderry, New Hampshire, United States Climate Change Severity

48
High
The current climate change severity in Londonderry is High, with a 4.9% 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 Jul. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Londonderry 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), Londonderry temperature has changed by around +4.5%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
3429
-14.7%
cloudyCloudy
6144
-27.8%
rainyRainy
7771
-7.7%
snowySnowy
99
0%
mistyMisty
06
100%

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

Climate Change Indicators:

Over the past 15 years, Londonderry has experienced measurable shifts in key climate parameters, contributing to the current severity score of 48 (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

48/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Londonderry experienced significant changes:

Temperature change of

+0.3 °C

Variation in annual rainfall

+54.9 %

Change in average humidity

-7.3 %

PM2.5 levels surged by

-11.3 %

Heatwave changed by

-0.2 day(s)

Coldwave changed by

-3.7 day(s)

Wind speeds changed by

+0.8 km/h

These indicators show that Londonderry 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 Jul.

Londonderry Weather Forecast 30 Days (August - September 2025)
Londonderry, New Hampshire, United States

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Fri. 8, Aug.
partly cloudyPartly Cloudy
Temperature Icon30°/17°
Humidity Icon59%
Wind Icon13km/h
Sat. 9, Aug.
sunnySunny
Temperature Icon31°/17°
Humidity Icon60%
Wind Icon14km/h
Sun. 10, Aug.
sunnySunny
Temperature Icon31°/18°
Humidity Icon62%
Wind Icon8km/h
Mon. 11, Aug.
sunnySunny
Temperature Icon35°/17°
Humidity Icon55%
Wind Icon8km/h
Tue. 12, Aug.
sunnySunny
Temperature Icon35°/20°
Humidity Icon52%
Wind Icon12km/h
Wed. 13, Aug.
sunnySunny
Temperature Icon35°/19°
Humidity Icon54%
Wind Icon14km/h
Thu. 14, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon34°/19°
Humidity Icon69%
Wind Icon10km/h
Fri. 15, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon33°/20°
Humidity Icon74%
Wind Icon12km/h
Sat. 16, Aug.
sunnySunny
Temperature Icon37°/20°
Humidity Icon67%
Wind Icon10km/h
Sun. 17, Aug.
sunnySunny
Temperature Icon36°/20°
Humidity Icon65%
Wind Icon10km/h
Mon. 18, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon34°/21°
Humidity Icon66%
Wind Icon13km/h
Tue. 19, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon34°/21°
Humidity Icon77%
Wind Icon16km/h
Wed. 20, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon20°/18°
Humidity Icon98%
Wind Icon11km/h
Thu. 21, Aug.
partly cloudyPartly Cloudy
Temperature Icon33°/16°
Humidity Icon75%
Wind Icon9km/h
Fri. 22, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/17°
Humidity Icon79%
Wind Icon15km/h
Sat. 23, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/16°
Humidity Icon76%
Wind Icon13km/h
Sun. 24, Aug.
moderate rain at timesModerate rain at times
Temperature Icon27°/16°
Humidity Icon73%
Wind Icon12km/h
Mon. 25, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon27°/16°
Humidity Icon75%
Wind Icon13km/h
Tue. 26, Aug.
heavy rain at timesHeavy rain at times
Temperature Icon28°/16°
Humidity Icon72%
Wind Icon13km/h
Wed. 27, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/16°
Humidity Icon73%
Wind Icon12km/h
Thu. 28, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/15°
Humidity Icon76%
Wind Icon14km/h
Fri. 29, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/15°
Humidity Icon77%
Wind Icon15km/h
Sat. 30, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon28°/16°
Humidity Icon72%
Wind Icon14km/h
Sun. 31, Aug.
moderate rain at timesModerate rain at times
Temperature Icon27°/16°
Humidity Icon68%
Wind Icon15km/h
Mon. 1, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/15°
Humidity Icon72%
Wind Icon12km/h
Tue. 2, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/15°
Humidity Icon77%
Wind Icon11km/h
Wed. 3, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon27°/15°
Humidity Icon78%
Wind Icon12km/h
Thu. 4, Sep.
moderate rain at timesModerate rain at times
Temperature Icon27°/15°
Humidity Icon74%
Wind Icon14km/h
Fri. 5, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/15°
Humidity Icon75%
Wind Icon14km/h
Sat. 6, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/15°
Humidity Icon77%
Wind Icon13km/h
Sun. 7, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/14°
Humidity Icon76%
Wind Icon12km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSat. 16, Aug.

36.6°C

Low will be onSun. 7, Sep.

14.4°C

HumidityHumidity

High will be onWed. 20, Aug.

98%

Low will be onTue. 12, Aug.

52%

Wind SpeedWind Speed

High will be onTue. 19, Aug.

15.5km/h

Low will be onSun. 10, Aug.

8.3km/h

PrecipitationPrecipitation

High will be onThu. 28, Aug.

9.1mm

Low will be onFri. 15, Aug.

0.1mm

Ultraviolet IndexUV

High will be onWed. 13, Aug.

7

Low will be onTue. 12, Aug.

0.1

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