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New Haven, CT Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in New Haven, CT?
New Haven, CT gets 41.8 in of precipitation a year over about 124 rainy days. July is the warmest month (average high 83°F) and January the coldest (average low 23°F).
Humid continental climate
New Haven, CT has warm summers and chilly winters. Daytime highs range from about 38°F in January to 83°F in July. April is usually the wettest month. The most comfortable time to visit is typically May to June and September to October, when daytime highs sit near 71°F.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 26° | 41° |
| Spring | Mar–May | 40° | 58° |
| Summer | Jun–Aug | 64° | 81° |
| Autumn | Sep–Nov | 47° | 65° |
How much rain does New Haven get?
New Haven gets 41.8 in of precipitation in an average year, spread over about 124 days with measurable rain. That is more rainy days than 81% of the US.
April is the wettest month, with 4.2 in. January is the driest, with 2.7 in. May has the most rainy days, about 13.
The longest dry spell in the last five years lasted 20 days, to April 21, 2023.
From September 2025 to August 2026 New Haven got 41.6 in of rain, against a normal of 41.8 in for those months. July 2026 had the most, with 7.7 in.
See where New Haven ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Connecticut.
New Haven weather by month
New Haven weather in January
In January, New Haven averages a high of 38°F and a low of 23°F. It gets 2.7 in of precipitation over about 10 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The January record high is 69°F (2020) and the record low is -4°F (2009).
New Haven weather in February
In February, New Haven averages a high of 40°F and a low of 24°F. It gets 2.8 in of precipitation over about 8 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The February record high is 68°F (2023) and the record low is -6°F (2016).
New Haven weather in March
In March, New Haven averages a high of 47°F and a low of 31°F. It gets 3.7 in of precipitation over about 10 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The March record high is 77°F (2021) and the record low is 4°F (2003).
New Haven weather in April
In April, New Haven averages a high of 58°F and a low of 40°F. It gets 4.2 in of precipitation over about 11 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The April record high is 88°F (2023) and the record low is 19°F (1970).
New Haven weather in May
In May, New Haven averages a high of 67°F and a low of 50°F. It gets 3.5 in of precipitation over about 13 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The May record high is 95°F (2022) and the record low is 30°F (2008). May is one of the most comfortable months to visit.
New Haven weather in June
In June, New Haven averages a high of 77°F and a low of 60°F. It gets 3.5 in of precipitation over about 12 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The June record high is 98°F (2025) and the record low is 42°F (2009). June is one of the most comfortable months to visit.
New Haven weather in July
In July, New Haven averages a high of 83°F and a low of 67°F. It gets 3.4 in of precipitation over about 10 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The July record high is 101°F (2011) and the record low is 50°F (2002).
New Haven weather in August
In August, New Haven averages a high of 82°F and a low of 65°F. It gets 3.5 in of precipitation over about 10 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The August record high is 95°F (1975) and the record low is 43°F (1976).
New Haven weather in September
In September, New Haven averages a high of 76°F and a low of 58°F. It gets 4.0 in of precipitation over about 9 rainy days. Estimated sunshine is 47% of daylight hours, derived from ERA5 cloud cover. The September record high is 95°F (2023) and the record low is 37°F (1974). September is one of the most comfortable months to visit.
New Haven weather in October
In October, New Haven averages a high of 64°F and a low of 47°F. It gets 3.8 in of precipitation over about 11 rainy days. Estimated sunshine is 50% of daylight hours, derived from ERA5 cloud cover. The October record high is 89°F (2019) and the record low is 23°F (2015). October is one of the most comfortable months to visit.
New Haven weather in November
In November, New Haven averages a high of 54°F and a low of 37°F. It gets 3.1 in of precipitation over about 9 rainy days. Estimated sunshine is 58% of daylight hours, derived from ERA5 cloud cover. The November record high is 80°F (2024) and the record low is 13°F (2018).
New Haven weather in December
In December, New Haven averages a high of 44°F and a low of 29°F. It gets 3.5 in of precipitation over about 11 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The December record high is 65°F (1973) and the record low is 6°F (1975).
Sunshine, humidity and wind in New Haven
November is the sunniest month in New Haven, with estimated sunshine of 58% of daylight hours from ERA5 cloud cover. January is the cloudiest, at 40%. The annual cloud-cover estimate is 45% of daylight hours; it is not a measurement of sunshine duration. New Haven is cloudier than 59% of the US.
Humidity peaks in July at 78% and is lowest in March at 65%.
Wind averages 7 mph over the year, and March is the windiest month at 8 mph.
New Haven has about 7 days a year above 90°F. New Haven is cooler than 85% of the US.
Thunderstorms occur on about 18 days a year.
See where New Haven ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
First and last freeze in New Haven
The first fall freeze in New Haven typically comes around October 31, and the last spring freeze around April 11. That leaves a frost-free growing season of about 203 days.
New Haven weather records
These records cover NEW HAVEN TWEED AP during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the New Haven station is 101°F, on July 22, 2011. The coldest is -6°F, on February 14, 2016.
The wettest day in the available station history brought 5.2 in of precipitation, on June 19, 1972.
42 all-time records have been set at the station since 1970.
The best time to visit New Haven
The most comfortable time to visit is typically May to June and September to October, when daytime highs sit near 71°F.
Winter (December–February) is chilly, with average highs around 41°F and lows near 26°F.
Spring (March–May) is mild, with average highs around 58°F and lows near 40°F.
Summer (June–August) is warm, with average highs around 81°F and lows near 64°F. It can feel humid.
Autumn (September–November) is mild, with average highs around 65°F and lows near 47°F.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Wind | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|---|
| January | 23° | 38° | 2.7 in | 10 | 8 mph | 68% | 40% | 69° | -4° |
| February | 24° | 40° | 2.8 in | 8 | 8 mph | 67% | 43% | 68° | -6° |
| March | 31° | 47° | 3.7 in | 10 | 8 mph | 65% | 44% | 77° | 4° |
| April | 40° | 58° | 4.2 in | 11 | 8 mph | 67% | 42% | 88° | 19° |
| May | 50° | 67° | 3.5 in | 13 | 7 mph | 71% | 44% | 95° | 30° |
| June | 60° | 77° | 3.5 in | 12 | 6 mph | 75% | 42% | 98° | 42° |
| July | 67° | 83° | 3.4 in | 10 | 6 mph | 78% | 44% | 101° | 50° |
| August | 65° | 82° | 3.5 in | 10 | 6 mph | 75% | 44% | 95° | 43° |
| September | 58° | 76° | 4.0 in | 9 | 7 mph | 73% | 47% | 95° | 37° |
| October | 47° | 64° | 3.8 in | 11 | 7 mph | 72% | 50% | 89° | 23° |
| November | 37° | 54° | 3.1 in | 9 | 7 mph | 66% | 58% | 80° | 13° |
| December | 29° | 44° | 3.5 in | 11 | 8 mph | 70% | 43% | 65° | 6° |
Station: NEW HAVEN TWEED AP, 6 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
New Haven climate questions
How much rain does New Haven get?
New Haven gets 41.8 in of precipitation in an average year, over about 124 rainy days.
What is the wettest month in New Haven?
April is the wettest month in New Haven, with 4.2 in. January is the driest, with 2.7 in.
How many rainy days does New Haven have a year?
New Haven has about 124 days with measurable rain in an average year. May has the most, about 13.
What is the hottest month in New Haven?
July is the warmest month in New Haven, with an average high of 83°F.
What is the coldest month in New Haven?
January is the coldest month in New Haven, with an average low of 23°F.
What is the record high temperature in New Haven?
Within the available 1970–2026 station history, the record high at the New Haven station is 101°F, set on July 22, 2011. The record low is -6°F, on February 14, 2016.
What is the sunniest month in New Haven?
November is the sunniest month in New Haven, with estimated sunshine of 58% of daylight hours from ERA5 cloud cover. January is the cloudiest.
When is the first frost in New Haven?
The first fall freeze in New Haven typically comes around October 31. The last spring freeze is around April 11.
What is the best time to visit New Haven?
The most comfortable time to visit is typically May to June and September to October, when daytime highs sit near 71°F.