Hartford weather by month

Check out Hartford weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Hartford (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
1°C maximum daytime temperature in January in Hartford1
2°C maximum daytime temperature in February in Hartford2
8°C maximum daytime temperature in March in Hartford8
15°C maximum daytime temperature in April in Hartford15
21°C maximum daytime temperature in May in Hartford21
26°C maximum daytime temperature in June in Hartford26
28°C maximum daytime temperature in July in Hartford28
28°C maximum daytime temperature in August in Hartford28
23°C maximum daytime temperature in September in Hartford23
18°C maximum daytime temperature in October in Hartford18
11°C maximum daytime temperature in November in Hartford11
3°C maximum daytime temperature in December in Hartford3
Min temperature (night-time)
-9°C minimum night-time temperature in January in Hartford-9
-7°C minimum night-time temperature in February in Hartford-7
-2°C minimum night-time temperature in March in Hartford-2
3°C minimum night-time temperature in April in Hartford3
8°C minimum night-time temperature in May in Hartford8
13°C minimum night-time temperature in June in Hartford13
17°C minimum night-time temperature in July in Hartford17
16°C minimum night-time temperature in August in Hartford16
11°C minimum night-time temperature in September in Hartford11
5°C minimum night-time temperature in October in Hartford5
0°C minimum night-time temperature in November in Hartford0
-6°C minimum night-time temperature in December in Hartford-6
Heat & Humidity
No heat & humidity in January in Hartford0
No heat & humidity in February in Hartford0
No heat & humidity in March in Hartford0
No heat & humidity in April in Hartford0
No heat & humidity in May in Hartford0
Low heat & humidity in June in HartfordL
Moderate heat & humidity in July in HartfordM
Moderate heat & humidity in August in HartfordM
No heat & humidity in September in Hartford0
No heat & humidity in October in Hartford0
No heat & humidity in November in Hartford0
No heat & humidity in December in Hartford0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Hartford

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Hartford10
11 hours of daylight per day in February in Hartford11
12 hours of daylight per day in March in Hartford12
13 hours of daylight per day in April in Hartford13
15 hours of daylight per day in May in Hartford15
15 hours of daylight per day in June in Hartford15
15 hours of daylight per day in July in Hartford15
14 hours of daylight per day in August in Hartford14
12 hours of daylight per day in September in Hartford12
11 hours of daylight per day in October in Hartford11
10 hours of daylight per day in November in Hartford10
9 hours of daylight per day in December in Hartford9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Hartford1
UV (maximum) index 2 (Low) in February in Hartford2
UV (maximum) index 4 (Moderate) in March in Hartford4
UV (maximum) index 6 (High) in April in Hartford6
UV (maximum) index 7 (High) in May in Hartford7
UV (maximum) index 8 (Very High) in June in Hartford8
UV (maximum) index 8 (Very High) in July in Hartford8
UV (maximum) index 8 (Very High) in August in Hartford8
UV (maximum) index 6 (High) in September in Hartford6
UV (maximum) index 4 (Moderate) in October in Hartford4
UV (maximum) index 2 (Low) in November in Hartford2
UV (maximum) index 1 (Low) in December in Hartford1

Rainfall in Hartford

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
11 days with some rainfall in January in Hartford11
10 days with some rainfall in February in Hartford10
11 days with some rainfall in March in Hartford11
11 days with some rainfall in April in Hartford11
12 days with some rainfall in May in Hartford12
11 days with some rainfall in June in Hartford11
9 days with some rainfall in July in Hartford9
10 days with some rainfall in August in Hartford10
9 days with some rainfall in September in Hartford9
8 days with some rainfall in October in Hartford8
11 days with some rainfall in November in Hartford11
12 days with some rainfall in December in Hartford12
Average monthly rainfall (mm)
84 mm monthly rainfall in January in Hartford84
79 mm monthly rainfall in February in Hartford79
92 mm monthly rainfall in March in Hartford92
100 mm monthly rainfall in April in Hartford100
101 mm monthly rainfall in May in Hartford101
95 mm monthly rainfall in June in Hartford95
88 mm monthly rainfall in July in Hartford88
93 mm monthly rainfall in August in Hartford93
95 mm monthly rainfall in September in Hartford95
90 mm monthly rainfall in October in Hartford90
100 mm monthly rainfall in November in Hartford100
97 mm monthly rainfall in December in Hartford97

More about Hartford

Hartford by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Connecticut

GO Airport Shuttle discount code: 5% off airport transfers

  • Save EXTRA 5% on airport transfers worldwide
  • Book private taxis & shuttle buses with discount code
  • Enter in coupon box on 'Reservations' page
Show discount codeShow discount code ******WEB
Redeem GO Airport Shuttle discount code >>

Expires at 23:59 on Thursday 31st Dec 2026

The climate guide for Connecticut (Hartford) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Hartford?

Hartford has a cold climate with hot summers and some rainfall in all months.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Tropical storm risk: Hartford, Connecticut hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
1.2%
1.3%
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Compare Hartford weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Hartford, Connecticut, USA and the UK (London).

Maximum daytime temperature (°C)

Hartford, Connecticut, USA
UK (London)
1
7
2
7
8
10
15
13
21
17
26
20
28
22
28
22
23
19
18
15
11
10
3
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more weather >>

Back to top

More about the USA

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^