Winona, MO climate
Winona has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 89°, a January night drops to 24°, and about 6 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Winona feels like
Winter
Spring
Summer
Fall
Winona 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 | 44° | 24° | 3.1" | 2.3" | 6 | 1 | 28° – 43° |
| February | 50° | 27° | 3.1" | 1.9" | 7 | 1 | 28° – 48° |
| March | 59° | 35° | 4.4" | 1.3" | 9 | 0 | 40° – 59° |
| April | 70° | 44° | 5.3" | 0 | 8 | 0 | 50° – 63° |
| May | 77° | 53° | 5.7" | 0 | 10 | 0 | 61° – 72° |
| June | 85° | 62° | 3.9" | 0 | 8 | 0 | 68° – 78° |
| July | 89° | 66° | 4.1" | 0 | 8 | 0 | 72° – 82° |
| August | 88° | 64° | 3.8" | 0 | 7 | 0 | 70° – 82° |
| September | 81° | 56° | 3.7" | 0 | 7 | 0 | 64° – 76° |
| October | 70° | 44° | 3.6" | 0 | 6 | 0 | 52° – 63° |
| November | 57° | 35° | 4.5" | 0.1" | 7 | 0 | 39° – 52° |
| December | 47° | 27° | 3.3" | 0.4" | 7 | 0 | 25° – 45° |
| Year | 68° | 45° | 48.5" | 6.0" | 89 | 1 |
“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 Winona
Winona gets 49 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 89 days a year.
About 176 frost-free days a year
In half of years the last 32° night comes by April 22 and the first one by October 18. That leaves about 176 frost-free days for gardens, shorter than 53% of U.S. towns.
Heating and cooling a home in Winona
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Winona, 83% of that work is heating and 17% 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 Winona 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 Winona averaged 0.9° warmer than the 1900s. The biggest change is in February (+2.0°). The shift is smaller than in 75% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Winona’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 25° to 45°. June is the most reliable, staying within 10°.
Common questions about Winona’s climate
What is the coldest month in Winona?
January, with a typical high of 44° and a low of 24°.
What is the hottest month in Winona?
July, with a typical high of 89° and a low of 66°. About 36 days a year reach 90°.
How much snow does Winona get?
About 6 inches in a normal winter, most of it in January.
When is the first frost in Winona?
In half of years the first 32° night comes by October 18, and the last spring frost by April 22.
What is the rainiest month in Winona?
May, with 5.7 inches of rain and melted snow. The year totals 49 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Winona itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Eminence 1 N, MO (11 mi, snow) and Winona 3 Sw, MO (4 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.