Historical Weather in New Haven, CT
See 55+ years of weather history for any date in New Haven going back to 1970.
Part of Connecticut weather history · Connecticut temperature records
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Monthly Climate Averages
Historical temperature and precipitation averages for New Haven, CT, based on 55+ years of weather data.
Warmest MonthJulyAvg High: 84°F / Low: 65°F
Coldest MonthJanuaryAvg High: 38°F / Low: 22°F
Jan
38°/ 22°
💧 9.0"
❄️ 2.0"
Feb
41°/ 24°
💧 9.2"
❄️ 2.3"
Mar
48°/ 31°
💧 10.4"
❄️ 2.1"
Apr
59°/ 40°
💧 11.9"
❄️ 2.3"
May
70°/ 50°
💧 9.4"
Jun
78°/ 59°
💧 10.3"
Jul
84°/ 65°
💧 10.8"
Aug
83°/ 64°
💧 11.1"
Sep
75°/ 56°
💧 12.5"
Oct
64°/ 45°
💧 12.6"
❄️ 0.9"
Nov
53°/ 36°
💧 10.6"
❄️ 2.0"
Dec
43°/ 27°
💧 9.9"
❄️ 1.7"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
New Haven, CT Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Avg high Avg low
New Haven, CT Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Rain (in) Snow (in)
New Haven, CT Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
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Best Time to Visit New Haven, CT
New Haven, CT has no months that meet our "pleasant" threshold — every season has tradeoffs.
Jan
Feb
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Apr
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Pleasant (65-82°F, ≤2.5" rain) Mild Less ideal
New Haven Temperature Records
- Record High: The hottest temperature ever recorded in New Haven, CT is 103°F, set on July 15, 1995.
- Record Low: The coldest temperature ever recorded in New Haven, CT is -15°F, set on January 12, 1981.
- Data Coverage: Based on 57 years of data from NOAA weather station: NEW HAVEN TWEED AP.
All-Time Record High
103°F
July 15, 1995
All-Time Record Low
-15°F
January 12, 1981
Monthly Temperature Records in New Haven
| Month | Record High | Record Low |
|---|---|---|
| January | 74°F(2020) | -15°F(1981) |
| February | 73°F(2018) | -13°F(1979) |
| March | 84°F(1990) | -1°F(2003) |
| April | 95°F(2002) | 14°F(1970) |
| May | 97°F(1996) | 28°F(1974) |
| June | 101°F(2025) | 36°F(1972) |
| July | 103°F(1995) | 42°F(1988) |
| August | 102°F(2001) | 39°F(1976) |
| September | 97°F(2015) | 31°F(1974) |
| October | 89°F(2019) | 20°F(1972) |
| November | 82°F(2024) | 6°F(1989) |
| December | 76°F(1998) | -13°F(1980) |
New Haven Snow RecordsSee the top 10 snowiest days ever recorded
→Holiday Weather in New Haven
Weather Analysis & Trends
RecordsHottest Temperatures Ever Recorded in Every US StateAll 50 state record highs ranked, including Connecticut.Severe WeatherTornado Season 2026: Forecasts & What to ExpectAn EF5 already, and the peak still ahead.Climate ForecastEl Niño 2026: What Every US Region Should Expect85% likely by late 2026. Region-by-region impact analysis.