Harrietta, MI climate
Harrietta has cold, snowy winters and pleasant summers. A typical July afternoon reaches 80°, a January night drops to 12°, and about 93 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Harrietta feels like
Winter
Spring
Summer
Fall
Harrietta 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 | 27° | 12° | 2.5" | 28.6" | 16 | 29 | 9° – 29° |
| February | 30° | 13° | 1.8" | 23.0" | 12 | 28 | 7° – 32° |
| March | 40° | 20° | 2.2" | 9.2" | 10 | 23 | 19° – 44° |
| April | 53° | 31° | 3.4" | 2.0" | 11 | 4 | 34° – 48° |
| May | 67° | 42° | 3.5" | 0.1" | 11 | 0 | 46° – 61° |
| June | 76° | 52° | 3.5" | 0 | 10 | 0 | 59° – 71° |
| July | 80° | 56° | 3.4" | 0 | 9 | 0 | 61° – 73° |
| August | 77° | 54° | 3.4" | 0 | 9 | 0 | 61° – 70° |
| September | 70° | 47° | 3.3" | 0 | 10 | 0 | 53° – 64° |
| October | 56° | 37° | 4.2" | 0.1" | 14 | 0 | 43° – 54° |
| November | 43° | 28° | 3.1" | 5.8" | 13 | 6 | 27° – 42° |
| December | 32° | 19° | 2.5" | 23.8" | 15 | 21 | 17° – 35° |
| Year | 54° | 34° | 36.6" | 92.6" | 139 | 110 |
“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 Harrietta
Harrietta gets 37 inches of rain and melted snow a year. October is the wettest month and February the driest. Rain or snow falls on about 139 days a year. Snow covers the ground about 110 days of the year.
About 135 frost-free days a year
In half of years the last 32° night comes by May 19 and the first one by October 1. That leaves about 135 frost-free days for gardens, shorter than 92% of U.S. towns.
Heating and cooling a home in Harrietta
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Harrietta, 95% of that work is heating and 5% 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.
How Harrietta 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 Harrietta averaged 2.0° warmer than the 1900s. The biggest change is in February (+3.4°). The shift is larger than in 93% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Harrietta’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 19° to 44°. August is the most reliable, staying within 10°.
Common questions about Harrietta’s climate
What is the coldest month in Harrietta?
January, with a typical high of 27° and a low of 12°.
What is the hottest month in Harrietta?
July, with a typical high of 80° and a low of 56°. About 4 days a year reach 90°.
How much snow does Harrietta get?
About 93 inches in a normal winter, most of it in January.
When is the first frost in Harrietta?
In half of years the first 32° night comes by October 1, and the last spring frost by May 19.
What is the rainiest month in Harrietta?
October, with 4.2 inches of rain and melted snow. The year totals 37 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Harrietta itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Wellston Tippy Dam, MI (12 mi, snow) and Cadillac, MI (15 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.