Hartford, Connecticut, United States Climate Change Severity

43
High
The current climate change severity in Hartford is High, with a 12.9% improvement in the climate score compared to last 16 years. This suggests improved conditions, with more favorable environmental indicators and a reduction in negative impacts.
Data: Jan. to Jul. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Hartford Weather Condition Changes (Historic Vs 2026)

2026
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2026

Over the past 16 year(s), Hartford temperature has changed by around +4.04%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jul. (Historical Vs 2026)

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
3688
144.4%
cloudyCloudy
5719
-66.6%
rainyRainy
7748
-37.6%
snowySnowy
77
0%
mistyMisty
16
500%

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

Climate Change Indicators:

Over the past 16 years, Hartford 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 2026, Hartford experienced significant changes:

Temperature change of

+0.4 °C

Variation in annual rainfall

+26.29 %

Change in average humidity

-4.21 %

PM2.5 levels surged by

-28.08 %

Heatwave changed by

+6 Days

Coldwave changed by

-5 Days

Wind speeds changed by

+0.06 km/h

These indicators show improvement in key parametes of climate, but Hartford 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 Jul.

Hartford Weather Forecast 30 Days (August - September 2026)
Hartford, Connecticut, United States

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Wed. 12, Aug.
sunnySunny
Temperature Icon33°/19°
Humidity Icon66%
Wind Icon14.8km/h
Thu. 13, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon30°/19°
Humidity Icon72%
Wind Icon13.3km/h
Fri. 14, Aug.
sunnySunny
Temperature Icon28°/16°
Humidity Icon51%
Wind Icon19.8km/h
Sat. 15, Aug.
sunnySunny
Temperature Icon27°/13°
Humidity Icon50%
Wind Icon10.1km/h
Sun. 16, Aug.
partly cloudyPartly Cloudy
Temperature Icon23°/16°
Humidity Icon78%
Wind Icon17.6km/h
Mon. 17, Aug.
sunnySunny
Temperature Icon29°/18°
Humidity Icon69%
Wind Icon16.9km/h
Tue. 18, Aug.
sunnySunny
Temperature Icon30°/14°
Humidity Icon54%
Wind Icon10.8km/h
Wed. 19, Aug.
sunnySunny
Temperature Icon32°/17°
Humidity Icon54%
Wind Icon10.1km/h
Thu. 20, Aug.
patchy rain possibleRain Possible
Temperature Icon28°/17°
Humidity Icon71%
Wind Icon12.6km/h
Fri. 21, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/17°
Humidity Icon75%
Wind Icon13.7km/h
Sat. 22, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/17°
Humidity Icon77%
Wind Icon14.7km/h
Sun. 23, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/16°
Humidity Icon74%
Wind Icon13.8km/h
Mon. 24, Aug.
heavy rain at timesHeavy Rain
Temperature Icon27°/16°
Humidity Icon73%
Wind Icon12.5km/h
Tue. 25, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/17°
Humidity Icon74%
Wind Icon13.3km/h
Wed. 26, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/17°
Humidity Icon71%
Wind Icon12.9km/h
Thu. 27, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/17°
Humidity Icon73%
Wind Icon12.4km/h
Fri. 28, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/16°
Humidity Icon76%
Wind Icon14.4km/h
Sat. 29, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon26°/16°
Humidity Icon74%
Wind Icon13.2km/h
Sun. 30, Aug.
heavy rain at timesHeavy Rain
Temperature Icon28°/16°
Humidity Icon71%
Wind Icon14km/h
Mon. 31, Aug.
heavy rain at timesHeavy Rain
Temperature Icon28°/16°
Humidity Icon69%
Wind Icon13.1km/h
Tue. 1, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon26°/16°
Humidity Icon74%
Wind Icon13.3km/h
Wed. 2, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon27°/15°
Humidity Icon74%
Wind Icon13.1km/h
Thu. 3, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon27°/15°
Humidity Icon76%
Wind Icon11.2km/h
Fri. 4, Sep.
heavy rain at timesHeavy Rain
Temperature Icon27°/16°
Humidity Icon74%
Wind Icon14.1km/h
Sat. 5, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon27°/16°
Humidity Icon75%
Wind Icon14.9km/h
Sun. 6, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon26°/16°
Humidity Icon77%
Wind Icon14.3km/h
Mon. 7, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon25°/15°
Humidity Icon78%
Wind Icon13.6km/h
Tue. 8, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon26°/15°
Humidity Icon75%
Wind Icon14.5km/h
Wed. 9, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon24°/14°
Humidity Icon73%
Wind Icon12.9km/h
Thu. 10, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon24°/14°
Humidity Icon77%
Wind Icon14.4km/h
Fri. 11, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon25°/14°
Humidity Icon76%
Wind Icon13.6km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onWed. 12, Aug.

33°C

Low will be onSat. 15, Aug.

13°C

HumidityHumidity

High will be onSun. 16, Aug.

78%

Low will be onSat. 15, Aug.

50%

Wind SpeedWind Speed

High will be onFri. 14, Aug.

19.8km/h

Low will be onSat. 15, Aug.

10.1km/h

PrecipitationPrecipitation

High will be onSat. 22, Aug.

10.5mm

Low will be onThu. 20, Aug.

0.2mm

Ultraviolet IndexUV

High will be onWed. 19, Aug.

8

Low will be onSun. 16, Aug.

1.8

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