New Haven, MO climate
New Haven has chilly winters and warm summers. A typical July afternoon reaches 89°, a January night drops to 21°, and about 8 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 40° | 21° | 2.4" | 2.6" | 8 | 25° – 42° |
| February | 46° | 25° | 2.3" | 1.4" | 8 | 25° – 45° |
| March | 57° | 33° | 3.3" | 0.7" | 11 | 37° – 58° |
| April | 68° | 43° | 4.6" | 0.1" | 11 | 49° – 61° |
| May | 76° | 53° | 4.8" | 0 | 13 | 60° – 73° |
| June | 85° | 63° | 4.3" | 0 | 10 | 68° – 78° |
| July | 89° | 66° | 4.2" | 0 | 8 | 72° – 84° |
| August | 88° | 64° | 4.0" | 0 | 8 | 70° – 82° |
| September | 80° | 56° | 3.6" | 0 | 8 | 63° – 75° |
| October | 69° | 44° | 3.2" | 0 | 9 | 51° – 62° |
| November | 56° | 34° | 3.4" | 0.4" | 8 | 37° – 51° |
| December | 44° | 26° | 2.6" | 2.7" | 8 | 21° – 43° |
| Year | 66° | 44° | 42.6" | 7.9" | 109 |
“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 43 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 109 days a year.
About 199 frost-free days a year
In half of years the last 32° night comes by April 8 and the first one by October 25. That leaves about 199 frost-free days for gardens, longer than 72% 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, 79% of that work is heating and 21% is cooling.
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.
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 1.0° warmer than the 1900s. The biggest change is in December (+2.2°). The shift is smaller than in 66% 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 21° to 43°. June is the most reliable, staying within 10°.
Common questions about New Haven’s climate
What is the coldest month in New Haven?
January, with a typical high of 40° and a low of 21°.
What is the hottest month in New Haven?
July, with a typical high of 89° and a low of 66°. About 40 days a year reach 90°.
How much snow does New Haven get?
About 8 inches in a normal winter, most of it in December.
When is the first frost in New Haven?
In half of years the first 32° night comes by October 25, and the last spring frost by April 8.
What is the rainiest month in New Haven?
May, with 4.8 inches of rain and melted snow. The year totals 43 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 Washington, MO (14 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.