Zalma, MO climate
Zalma has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 90°, a January night drops to 25°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Zalma feels like
Winter
Spring
Summer
Fall
Zalma weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 43° | 25° | 3.4" | 28° – 43° |
| February | 49° | 29° | 3.4" | 28° – 47° |
| March | 59° | 37° | 4.5" | 41° – 59° |
| April | 70° | 45° | 5.4" | 51° – 63° |
| May | 78° | 56° | 5.6" | 63° – 74° |
| June | 87° | 65° | 3.9" | 71° – 81° |
| July | 90° | 68° | 4.3" | 74° – 84° |
| August | 89° | 66° | 3.5" | 72° – 83° |
| September | 82° | 58° | 3.3" | 66° – 76° |
| October | 71° | 46° | 3.7" | 54° – 64° |
| November | 57° | 36° | 4.6" | 39° – 52° |
| December | 47° | 29° | 3.9" | 25° – 46° |
| Year | 68° | 47° | 49.4" |
“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 Zalma
Zalma gets 49 inches of rain and melted snow a year. May is the wettest month and September the driest.
About 193 frost-free days a year
In half of years the last 32° night comes by April 12 and the first one by October 23. That leaves about 193 frost-free days for gardens, longer than 67% of U.S. towns.
Heating and cooling a home in Zalma
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Zalma, 72% of that work is heating and 28% 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 Zalma 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 Zalma averaged 0.5° warmer than the 1900s. The biggest change is in February (+1.4°). The shift is smaller than in 96% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Zalma’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 46°. October is the most reliable, staying within 10°.
Common questions about Zalma’s climate
What is the coldest month in Zalma?
January, with a typical high of 43° and a low of 25°.
What is the hottest month in Zalma?
July, with a typical high of 90° and a low of 68°. About 38 days a year reach 90°.
When is the first frost in Zalma?
In half of years the first 32° night comes by October 23, and the last spring frost by April 12.
What is the rainiest month in Zalma?
May, with 5.6 inches of rain and melted snow. The year totals 49 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Zalma itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Marble Hill, MO (13 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.