Wynona, OK climate
Wynona has chilly winters and warm summers. A typical July afternoon reaches 92°, a January night drops to 25°, and about 8 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Wynona feels like
Winter
Spring
Summer
Fall
Wynona 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 | 47° | 25° | 1.5" | 1.9" | 6 | 1 | 31° – 45° |
| February | 52° | 29° | 1.7" | 1.6" | 6 | 1 | 34° – 48° |
| March | 62° | 38° | 2.9" | 1.5" | 9 | 0 | 43° – 59° |
| April | 71° | 47° | 4.3" | 0 | 9 | 0 | 52° – 65° |
| May | 78° | 57° | 6.2" | 0 | 11 | 0 | 63° – 74° |
| June | 86° | 66° | 5.2" | 0 | 9 | 0 | 72° – 81° |
| July | 92° | 70° | 4.0" | 0 | 8 | 0 | 77° – 88° |
| August | 91° | 68° | 3.5" | 0 | 8 | 0 | 73° – 86° |
| September | 84° | 60° | 3.7" | 0 | 8 | 0 | 67° – 79° |
| October | 72° | 48° | 3.5" | 0 | 8 | 0 | 54° – 66° |
| November | 60° | 37° | 2.3" | 0.2" | 7 | 0 | 42° – 56° |
| December | 49° | 28° | 1.9" | 3.0" | 6 | 2 | 26° – 43° |
| Year | 70° | 48° | 40.7" | 8.2" | 95 | 4 |
“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 Wynona
Wynona gets 41 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 95 days a year.
About 204 frost-free days a year
In half of years the last 32° night comes by April 6 and the first one by October 29. That leaves about 204 frost-free days for gardens, longer than 75% of U.S. towns.
Heating and cooling a home in Wynona
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Wynona, 66% of that work is heating and 34% 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 Wynona compares
Compared with every U.S. town and city on TownTapestry, each counted once.
About as warm as it used to be
The last 30 years in Wynona averaged 0.2° warmer than the 1900s. The biggest change is in January (+1.5°). The shift is smaller than in 99% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Wynona’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 26° to 43°. June is the most reliable, staying within 9°.
Common questions about Wynona’s climate
What is the coldest month in Wynona?
January, with a typical high of 47° and a low of 25°.
What is the hottest month in Wynona?
July, with a typical high of 92° and a low of 70°. About 61 days a year reach 90°.
How much snow does Wynona get?
About 8 inches in a normal winter, most of it in December.
When is the first frost in Wynona?
In half of years the first 32° night comes by October 29, and the last spring frost by April 6.
What is the rainiest month in Wynona?
May, with 6.2 inches of rain and melted snow. The year totals 41 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Wynona itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bartlesville F P Fld, OK (23 mi, snow) and Pawhuska, OK (9 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.