Climate and monthly weather forecastHartford, CT
Climate and monthly weather forecast
The climate of Hartford
Located in the northeastern part of the United States, Hartford, the capital of Connecticut, falls under the Humid Continental climate type (indicated by the Köppen classification Dfa) which is characterized by no dry season and hot summers. This framework of climate implies a significant and broad range of atmospheric conditions. Over the cycle of a year, temperatures fluctuate, hitting a peak of 82.9°F (28.3°C) in July and dropping to a chilly low of 21.4°F (-5.9°C) in January. Humidity remains relatively steady, averaging between 70% and 79% throughout the year.Wind speeds in the city mirror the temperature trends. A more noticeable breeze can be felt in chilly months, with wind speeds peaking at 7.8mph (12.6km/h) to 8.1mph (13km/h) from November to March, while the gentler breezes of 5.3mph (8.5km/h) are experienced in the warmer months of July and August. However, the wind never truly dies down completely, maintaining an ever-present but varying intensity.
Hartford experiences rainfall quite evenly throughout the year, with every month receiving a significant amount. June and July see the most rain with an average of 1.06" (27mm), while September receives the least at 0.43" (11mm). The city receives snowfall from November to March, with the heaviest snow of 1.14" (29mm) falling in February.
The best time to visit Hartford
The best months to enjoy Hartford are May through September, as these months enjoy warm weather with high temperatures averaging from 56.5°F (13.6°C) to 82.9°F (28.3°C). These months also witness the longest daylight hours, from 13.4 hours to 15.2 hours per day, allowing ample time for sightseeing and outdoor activities. Additionally, these months offer the most sunshine hours, with July and August providing around 10.4 hours of sunshine each day.The worst time to visit Hartford
December through February are considered less favorable months for visiting Hartford, largely due to the colder weather. During this period, temperatures dip to lows of 21.4°F (-5.9°C) to 27.7°F (-2.4°C), making outdoor activities less enjoyable. These months also have the shortest daylight hours, from 9.2 to 9.8 hours per day, limiting the time available for sightseeing. Furthermore, these months see a higher amount of snowfall, particularly in February when an average of 1.14" (29mm) of snow is expected.Spring weather in Hartford
Spring in Hartford, occurring from March to May, is characterized by steadily rising temperatures and increasing daylight hours. In March, a high temperature of 43.9°F (6.6°C) increases to 68.7°F (20.4°C) by May. Daylight hours similarly extend from 12 hours in March to 14.6 hours in May. Spring also brings a slight increment in rainfall from 0.83" (21mm) in March to 0.98" (25mm) in April and 0.91" (23mm) in May. Snowfall begins to taper off with only 0.24" (6mm) in April and a scant 0.04" (1mm) in May.Summer weather in Hartford
Summer in Hartford spans from June to August, bringing peak temperatures and extended sunlight hours. High temperatures range from 76.5°F (24.7°C) in June to a yearly peak of 82.9°F (28.3°C) in July, before slightly dropping to 81°F (27.2°C) in August. The summer period is the most humid, with relative humidity at around 74%. Rainfall is at its highest, particularly in June and July with 1.06" (27mm) recorded. Despite the rains, sunshine hours are at a peak with sunny days extending from 9.3 hours in June to 10.4 hours in July and August.Autumn weather in Hartford
Autumn in Hartford runs from September through November. This season brings falling temperatures, starting with 73.4°F (23°C) in September and cooling down to 48.9°F (9.4°C) by November. Daylight hours get shorter, decreasing from 12.5 hours in September to 9.8 hours in November. Rainfall increases from 0.43" (11mm) in September to 0.94" (24mm) in November; however, the days remain fairly sunny with an average of 5.6 to 8.7 hours of sunshine.Winter weather in Hartford
Winter in Hartford, from December through February, is defined by cold temperatures and limited daylight. High temperatures fluctuate between 33.1°F (0.6°C) and 38.5°F (3.6°C), while the nighttime temperature can drop as low as 21.4°F (-5.9°C) in January. Despite December and January having the shortest daylight hours with 9.2 and 9.6 hours respectively, these months also enjoy moderate levels of sunshine, averaging around 4.8 to 5.1 hours a day. Snowfall is mostly concentrated in these months, peaking at 1.14" (29mm) in February.Weather in January
January in Hartford, Connecticut witnesses a subdued winter character, with the mercury often lingering in the low range. Flurries of snow appear, altering the landscape and environment drastically. The propensity towards colder conditions might potentially augment the beauty, but it also accentuates the chills. Weather in January »Weather in February
As the seasonal wheel rotates to February, weather conditions in Hartford, Connecticut remain persistently cold yet develop a slight improvement. Amid the winter cocoon, rare sunny minutes provide a modicum of relief. Despite the average high temperature rising to 35.8°F (2.1°C), the intense winter feel seldom loosens its grip. Weather in February »Weather in March
Moving into March, the city of Hartford, Connecticut steps towards the brink of spring. A transformation ensues, with the climate reviving from winter's intense cold. A median high temperature of 43.9°F (6.6°C) signifies the transition into milder weather. Weather in March »Weather in April
Hartford weather in April asserts a full fledged spring statement. The climate overcomes residual winter chills, substituting them with mild, pleasant conditions. A remarkable upswing is observed with temperatures scaling up to an average high of 56.5°F (13.6°C). Weather in April »Weather in May
May is when Hartford, Connecticut enters the threshold of summer. A surge in temperatures reflects the imminent arrival of the hot season. Temperatures, particularly, mark an upward trend, registering an average high of 68.7°F (20.4°C). Weather in May »Weather in June
June is synonymous with the onset of summer in Hartford, Connecticut. The weather becomes warmer warranting the need for summer attire. Following the trend, temperatures notch up further with the highest reaching 76.5°F (24.7°C). However, these temperature hikes do not deter the residents' spirit as they revel in summer activities. Weather in June »Weather in July
July witnesses Hartford, Connecticut at its climatic peak, with the weather turning significantly hot. Summer is in full swing, and city dwellers adapt to the shift. A high temperature of 82.9°F (28.3°C) ranks it as the warmest month of the year. Weather in July »Weather in August
In August, Hartford, Connecticut's summer saga continues, though with a slight respite. The month sustains the warm trend, albeit with a slight retreat in intensity. Despite the mercury reaching 81°F (27.2°C), this period is less severe compared to July. Weather in August »Weather in September
With September arrives the advent of autumn in Hartford, Connecticut. The environment begins to respond, embracing gradual climatic shifts. As the weather starts cooling down, the city experiences a high of 73.4°F (23°C). The cityscape gets a new paint job, trading the vibrant green scenery for a deep, rustic orange. Weather in September »Weather in October
October in Hartford, Connecticut heralds a deep dive into autumn. Temperatures fall, presaging the approaching winter. Relief from summer heat is palpable, as the average high temperature dips to 61.2°F (16.2°C). Enwrapped in the warm hues of fall, the city embraces its ultimate autumn spell. Weather in October »Weather in November
November witnesses Hartford, Connecticut preparing for the impending winter wave. The mercury continues to drop, reinforcing the chilly atmosphere. The month experiences a conspicuous dropdown in temperatures, with an average high of 48.9°F (9.4°C). Weather in November »Weather in December
As December rolls in, Hartford, Connecticut dons its winter cap. Temperatures continue to plummet, marking a stark departure from the autumn mildness. The descent is evident as temperatures stoop to a low of 27.7°F (-2.4°C). Snowfall dresses the city in a pristine white layer, turning it into a winter wonderland. Weather in December »Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, with average temperatures reaching a high of 33.1°F (0.6°C) and a low of 21.4°F (-5.9°C), is the coldest month.
In Hartford, Connecticut, during the entire year, the rain falls for 113.2 days and collects up to 10.24" (260mm) of precipitation.
Months with snowfall in Hartford are January through May, November and December.
Throughout the year, in Hartford, there are 21.5 snowfall days, and 4.45" (113mm) of snow is accumulated.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
February is the most humid month, with an average relative humidity of 79%.
The month with the most snowfall in Hartford is February, when snow falls for 5.7 days and typically aggregates up to 1.14" (29mm) of snow.
February has the least sunshine of the year, with an average of 4.6h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Hartford, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
The least humid month in Hartford, Connecticut, is April, with an average relative humidity of 70%.
The wettest months in Hartford, Connecticut, are June and July, with an average 1.06" (27mm) of rainfall.
In Hartford, Connecticut, snow does not fall in June through October.
With an average of 15h and 12min of daylight, June has the longest days of the year in Hartford, Connecticut.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
July is the warmest month in Hartford, with an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 63.7°F (17.6°C).
July and August, with an average of 10.4h of sunshine, are months with the most sunshine in Hartford.
September is the month with the least rainfall. Rain falls for 8.2 days and accumulates 0.43" (11mm) of precipitation.
With an average of 9h and 12min of daylight, December has the shortest days of the year in Hartford.
Average temperature
Hartford, CT
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.1°F).
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure
Hartford, CT
- Average pressure in January:
30.03"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Hartford, CT
- Average wind speed in January:
8.1mph - Average wind speed in February:
8mph - Average wind speed in March:
8.1mph - Average wind speed in April:
7.8mph - Average wind speed in May:
6.5mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.8mph - Average wind speed in October:
6.9mph - Average wind speed in November:
7.3mph - Average wind speed in December:
7.8mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity
Hartford, CT
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).
Average rainfall
Hartford, CT
- Average rainfall in January:
0.63" - Average rainfall in February:
0.63" - Average rainfall in March:
0.83" - Average rainfall in April:
0.98" - Average rainfall in May:
0.91" - Average rainfall in June:
1.06"
- Average rainfall in July:
1.06" - Average rainfall in August:
0.79" - Average rainfall in September:
0.43" - Average rainfall in October:
1.02" - Average rainfall in November:
0.94" - Average rainfall in December:
0.94"
The wettest months (with the highest rainfall) are June and July (1.06").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days
Hartford, CT
- Average rainfall days in January:
6.9 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
10.8 days - Average rainfall days in June:
11.6 days
- Average rainfall days in July:
11.8 days - Average rainfall days in August:
11.4 days - Average rainfall days in September:
8.2 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
7.7 days - Average rainfall days in December:
7.6 days
The month with the highest number of rainy days is July (11.8 days).
The month with the least rainy days is February (6.8 days).
Average snowfall
Hartford, CT
- Average snowfall in January:
0.91" - Average snowfall in February:
1.14" - Average snowfall in March:
1.06" - Average snowfall in April:
0.24" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (1.14").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Hartford, CT
- Average snowfall days in January:
5.5 days - Average snowfall days in February:
5.7 days - Average snowfall days in March:
4.5 days - Average snowfall days in April:
0.7 days - Average snowfall days in May:
0.2 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.3 days - Average snowfall days in December:
3.5 days
The month with the highest number of snowfall days is February (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Hartford, CT
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
5h and 6min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 18min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 18min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 24min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 48min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days
Hartford, CT
- Average sunshine days in January:
20.4 days - Average sunshine days in February:
17.1 days - Average sunshine days in March:
17.9 days - Average sunshine days in April:
16.9 days - Average sunshine days in May:
16.9 days - Average sunshine days in June:
16.3 days
- Average sunshine days in July:
17.2 days - Average sunshine days in August:
17.4 days - Average sunshine days in September:
20.3 days - Average sunshine days in October:
18.7 days - Average sunshine days in November:
20.4 days - Average sunshine days in December:
19.5 days
The months with the most sunshine days are January and November (20.4 days).
The month with the least sunshine days is June (16.3 days).
Average UV index
Hartford, CT
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Hartford, CT
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility
Hartford, CT
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
