Mammoth Spring, AR climate
Mammoth Spring has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 90°, a January night drops to 25°, and about 5 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Mammoth Spring feels like
Winter
Spring
Summer
Fall
Mammoth Spring 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 | 46° | 25° | 3.2" | 1.6" | 8 | 1 | 30° – 43° |
| February | 51° | 29° | 3.5" | 1.0" | 8 | 2 | 32° – 49° |
| March | 60° | 36° | 4.7" | 1.4" | 10 | 1 | 41° – 60° |
| April | 71° | 45° | 5.3" | 0 | 9 | 0 | 52° – 64° |
| May | 78° | 55° | 5.6" | 0 | 10 | 0 | 62° – 73° |
| June | 86° | 63° | 3.5" | 0 | 8 | 0 | 70° – 80° |
| July | 90° | 67° | 3.9" | 0 | 8 | 0 | 73° – 82° |
| August | 89° | 65° | 3.7" | 0 | 8 | 0 | 72° – 83° |
| September | 82° | 57° | 3.7" | 0 | 6 | 0 | 65° – 76° |
| October | 72° | 45° | 3.7" | 0 | 8 | 0 | 54° – 65° |
| November | 59° | 36° | 4.6" | 0.1" | 8 | 0 | 41° – 53° |
| December | 49° | 28° | 3.7" | 0.7" | 8 | 1 | 26° – 47° |
| Year | 69° | 46° | 49.0" | 4.8" | 98 | 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 Mammoth Spring
Mammoth Spring gets 49 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 98 days a year.
About 194 frost-free days a year
In half of years the last 32° night comes by April 12 and the first one by October 24. That leaves about 194 frost-free days for gardens, longer than 68% of U.S. towns.
Heating and cooling a home in Mammoth Spring
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mammoth Spring, 75% of that work is heating and 25% 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 Mammoth Spring 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 Mammoth Spring averaged 1.3° warmer than the 1900s. The biggest change is in February (+2.1°). The shift is larger than in 54% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mammoth Spring’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 47°. July is the most reliable, staying within 9°.
Common questions about Mammoth Spring’s climate
What is the coldest month in Mammoth Spring?
January, with a typical high of 46° and a low of 25°.
What is the hottest month in Mammoth Spring?
July, with a typical high of 90° and a low of 67°. About 49 days a year reach 90°.
How much snow does Mammoth Spring get?
About 5 inches in a normal winter, most of it in January.
When is the first frost in Mammoth Spring?
In half of years the first 32° night comes by October 24, and the last spring frost by April 12.
What is the rainiest month in Mammoth Spring?
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 Mammoth Spring itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Salem, AR (17 mi, snow) and Mammoth Spring, AR (1 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.