Cosby, MO climate
Cosby has chilly winters and warm summers. A typical July afternoon reaches 88°, a January night drops to 17°, and about 21 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Cosby feels like
Winter
Spring
Summer
Fall
Cosby 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 | 36° | 17° | 1.0" | 5.3" | 5 | 20° – 39° |
| February | 42° | 22° | 1.3" | 5.6" | 5 | 22° – 42° |
| March | 54° | 32° | 2.2" | 2.0" | 8 | 36° – 57° |
| April | 65° | 42° | 3.8" | 0.5" | 10 | 45° – 59° |
| May | 75° | 53° | 5.1" | 0 | 11 | 58° – 73° |
| June | 84° | 63° | 5.0" | 0 | 10 | 69° – 77° |
| July | 88° | 67° | 5.1" | 0 | 9 | 72° – 83° |
| August | 86° | 64° | 4.0" | 0 | 8 | 69° – 81° |
| September | 79° | 55° | 3.7" | 0 | 7 | 61° – 73° |
| October | 67° | 43° | 3.1" | 0.3" | 8 | 48° – 59° |
| November | 52° | 32° | 2.0" | 1.5" | 6 | 34° – 51° |
| December | 40° | 22° | 1.5" | 5.5" | 5 | 17° – 38° |
| Year | 64° | 43° | 37.7" | 20.7" | 92 |
“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 Cosby
Cosby gets 38 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 92 days a year.
About 184 frost-free days a year
In half of years the last 32° night comes by April 17 and the first one by October 19. That leaves about 184 frost-free days for gardens, longer than 57% of U.S. towns.
Heating and cooling a home in Cosby
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Cosby, 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 Cosby 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 Cosby averaged 0.7° warmer than the 1900s. The biggest change is in March (+2.1°). The shift is smaller than in 91% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Cosby’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 36° to 57°. June is the most reliable, staying within 8°.
Common questions about Cosby’s climate
What is the coldest month in Cosby?
January, with a typical high of 36° and a low of 17°.
What is the hottest month in Cosby?
July, with a typical high of 88° and a low of 67°. About 33 days a year reach 90°.
How much snow does Cosby get?
About 21 inches in a normal winter, most of it in February.
When is the first frost in Cosby?
In half of years the first 32° night comes by October 19, and the last spring frost by April 17.
What is the rainiest month in Cosby?
May, with 5.1 inches of rain and melted snow. The year totals 38 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Cosby itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Amity 4 Ne, MO (17 mi, snow) and Cosby 2w, MO (2 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.