Groton, Connecticut, United States Climate Change Severity

43
High
The current climate change severity in Groton is High, with a 3.7% 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 Sep. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Groton 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), Groton 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
5738
-33.3%
cloudyCloudy
7456
-24.3%
rainyRainy
10269
-32.3%
snowySnowy
61
-83.3%
mistyMisty
09
100%

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

Climate Change Indicators:

Over the past 15 years, Groton has experienced measurable shifts in key climate parameters, contributing to the current severity score of 43 (within the High severity category). While the score remains High, certain factors have improved over time. 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, Groton experienced significant changes:

Temperature change of

-0.3 °C

Variation in annual rainfall

+48.2 %

Change in average humidity

-1.007 %

PM2.5 levels surged by

-19.6 %

Heatwave changed by

+1.3 day(s)

Coldwave changed by

-5.3 day(s)

Wind speeds changed by

+1.4 km/h

These indicators show improvement in key parametes of climate, but Groton remains in the High severity category. Continuous focus on climate resilience is necessary to avoid further worsening and ensure sustainability.

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

Groton Weather Forecast 30 Days (October 2025)
Groton, Connecticut, United States

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Wed. 1, Oct.
sunnySunny
Temperature Icon21°/11°
Humidity Icon61%
Wind Icon29km/h
Thu. 2, Oct.
sunnySunny
Temperature Icon19°/9°
Humidity Icon58%
Wind Icon19km/h
Fri. 3, Oct.
partly cloudyPartly Cloudy
Temperature Icon21°/11°
Humidity Icon65%
Wind Icon18km/h
Sat. 4, Oct.
sunnySunny
Temperature Icon22°/14°
Humidity Icon70%
Wind Icon17km/h
Sun. 5, Oct.
sunnySunny
Temperature Icon23°/16°
Humidity Icon78%
Wind Icon15km/h
Mon. 6, Oct.
sunnySunny
Temperature Icon24°/17°
Humidity Icon72%
Wind Icon13km/h
Tue. 7, Oct.
sunnySunny
Temperature Icon24°/17°
Humidity Icon73%
Wind Icon14km/h
Wed. 8, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon22°/16°
Humidity Icon84%
Wind Icon23km/h
Thu. 9, Oct.
sunnySunny
Temperature Icon14°/7°
Humidity Icon56%
Wind Icon35km/h
Fri. 10, Oct.
sunnySunny
Temperature Icon15°/6°
Humidity Icon55%
Wind Icon20km/h
Sat. 11, Oct.
moderate rainModerate rain
Temperature Icon19°/10°
Humidity Icon78%
Wind Icon50km/h
Sun. 12, Oct.
sunnySunny
Temperature Icon15°/8°
Humidity Icon59%
Wind Icon19km/h
Mon. 13, Oct.
sunnySunny
Temperature Icon16°/10°
Humidity Icon52%
Wind Icon14km/h
Tue. 14, Oct.
sunnySunny
Temperature Icon18°/9°
Humidity Icon57%
Wind Icon19km/h
Wed. 15, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/11°
Humidity Icon75%
Wind Icon24km/h
Thu. 16, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/10°
Humidity Icon75%
Wind Icon26km/h
Fri. 17, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/9°
Humidity Icon71%
Wind Icon24km/h
Sat. 18, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/9°
Humidity Icon68%
Wind Icon22km/h
Sun. 19, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/9°
Humidity Icon70%
Wind Icon22km/h
Mon. 20, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/10°
Humidity Icon73%
Wind Icon21km/h
Wed. 22, Oct.
heavy rain at timesHeavy rain at times
Temperature Icon17°/11°
Humidity Icon74%
Wind Icon23km/h
Thu. 23, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/9°
Humidity Icon76%
Wind Icon22km/h
Fri. 24, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/10°
Humidity Icon78%
Wind Icon23km/h
Sat. 25, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/10°
Humidity Icon76%
Wind Icon22km/h
Sun. 26, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/10°
Humidity Icon74%
Wind Icon23km/h
Mon. 27, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/9°
Humidity Icon77%
Wind Icon25km/h
Tue. 28, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/9°
Humidity Icon77%
Wind Icon25km/h
Wed. 29, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon14°/8°
Humidity Icon80%
Wind Icon29km/h
Thu. 30, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon14°/8°
Humidity Icon80%
Wind Icon24km/h
Fri. 31, Oct.
heavy rain at timesHeavy rain at times
Temperature Icon14°/8°
Humidity Icon76%
Wind Icon23km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onMon. 6, Oct.

23.9°C

Low will be onFri. 10, Oct.

5.8°C

HumidityHumidity

High will be onWed. 8, Oct.

84%

Low will be onMon. 13, Oct.

52%

Wind SpeedWind Speed

High will be onSat. 11, Oct.

49.7km/h

Low will be onMon. 6, Oct.

13.3km/h

PrecipitationPrecipitation

High will be onWed. 29, Oct.

12.2mm

Low will be onWed. 8, Oct.

0.8mm

Ultraviolet IndexUV

High will be onMon. 6, Oct.

5

Low will be onWed. 15, Oct.

3

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