New Haven, IN climate
New Haven has chilly, snowy winters and warm summers. A typical July afternoon reaches 84°, a January night drops to 18°, and about 34 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in New Haven feels like
Winter
Spring
Summer
Fall
New Haven weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 33° | 18° | 2.5" | 10.8" | 13 | 15 | 16° – 37° |
| February | 37° | 21° | 2.0" | 7.8" | 11 | 11 | 16° – 39° |
| March | 48° | 29° | 2.6" | 4.6" | 12 | 4 | 30° – 53° |
| April | 61° | 39° | 3.8" | 0.8" | 13 | 0 | 43° – 56° |
| May | 72° | 50° | 4.5" | 0 | 14 | 0 | 54° – 67° |
| June | 81° | 60° | 4.3" | 0 | 12 | 0 | 65° – 74° |
| July | 84° | 63° | 4.0" | 0 | 10 | 0 | 68° – 79° |
| August | 82° | 61° | 3.9" | 0 | 9 | 0 | 67° – 77° |
| September | 77° | 53° | 3.2" | 0 | 9 | 0 | 61° – 69° |
| October | 64° | 43° | 2.9" | 0.1" | 10 | 0 | 49° – 60° |
| November | 50° | 32° | 3.0" | 1.9" | 11 | 1 | 34° – 48° |
| December | 38° | 24° | 2.4" | 7.6" | 12 | 8 | 17° – 41° |
| Year | 60° | 41° | 39.1" | 33.6" | 135 | 38 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in New Haven
New Haven gets 39 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 135 days a year. Snow covers the ground about 38 days of the year.
About 178 frost-free days a year
In half of years the last 32° night comes by April 24 and the first one by October 21. That leaves about 178 frost-free days for gardens, longer than 50% of U.S. towns.
Heating and cooling a home in New Haven
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In New Haven, 88% of that work is heating and 12% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
New Haven and its neighbors
New Haven borders 4 towns with climate data. January nights across them vary by 0.6°. St. Joseph has the coldest January nights (18°) and Adams the hottest July afternoons (84°). New Haven’s January low is 18° and its July high 84°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How New Haven compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in New Haven averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.5°). The shift is smaller than in 51% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at New Haven’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 17° to 41°. September is the most reliable, staying within 8°.
Common questions about New Haven’s climate
What is the coldest month in New Haven?
January, with a typical high of 33° and a low of 18°.
What is the hottest month in New Haven?
July, with a typical high of 84° and a low of 63°. About 16 days a year reach 90°.
How much snow does New Haven get?
About 34 inches in a normal winter, most of it in January.
When is the first frost in New Haven?
In half of years the first 32° night comes by October 21, and the last spring frost by April 24.
What is the rainiest month in New Haven?
May, with 4.5 inches of rain and melted snow. The year totals 39 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for New Haven itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Ft Wayne Intl Airport, IN (12 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.