Mountain, TN climate
Mountain has chilly winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 82°, a January night drops to 24°, and about 12 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Mountain feels like
Winter
Spring
Summer
Fall
Mountain 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 | 44° | 24° | 4.0" | 3.4" | 9 | 27° – 41° |
| February | 48° | 27° | 3.8" | 5.0" | 9 | 28° – 46° |
| March | 56° | 32° | 4.0" | 1.1" | 10 | 37° – 52° |
| April | 66° | 39° | 4.5" | 0.1" | 10 | 47° – 57° |
| May | 73° | 47° | 4.7" | 0 | 12 | 53° – 65° |
| June | 80° | 56° | 4.5" | 0 | 12 | 64° – 72° |
| July | 82° | 60° | 5.2" | 0 | 12 | 67° – 74° |
| August | 82° | 59° | 4.2" | 0 | 10 | 67° – 75° |
| September | 76° | 52° | 3.2" | 0 | 8 | 60° – 70° |
| October | 66° | 41° | 3.2" | 0 | 7 | 50° – 59° |
| November | 56° | 31° | 3.3" | 0.4" | 7 | 38° – 49° |
| December | 47° | 27° | 4.0" | 2.0" | 9 | 27° – 48° |
| Year | 65° | 41° | 48.6" | 12.0" | 114 |
“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 Mountain
Mountain gets 49 inches of rain and melted snow a year. July is the wettest month and September the driest. Rain or snow falls on about 114 days a year.
About 170 frost-free days a year
In half of years the last 32° night comes by April 27 and the first one by October 14. That leaves about 170 frost-free days for gardens, shorter than 61% of U.S. towns.
Heating and cooling a home in Mountain
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mountain, 88% of that work is heating and 12% 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 Mountain 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 Mountain averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.2°). The shift is smaller than in 58% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mountain’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 27° to 48°. June is the most reliable, staying within 7°.
Common questions about Mountain’s climate
What is the coldest month in Mountain?
January, with a typical high of 44° and a low of 24°.
What is the hottest month in Mountain?
July, with a typical high of 82° and a low of 60°. About 3 days a year reach 90°.
How much snow does Mountain get?
About 12 inches in a normal winter, most of it in February.
When is the first frost in Mountain?
In half of years the first 32° night comes by October 14, and the last spring frost by April 27.
What is the rainiest month in Mountain?
July, with 5.2 inches of rain and melted snow. The year totals 49 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mountain itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Mtn City 2, TN (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.