Oak Grove, TN climate
Oak Grove has chilly winters and warm summers. A typical July afternoon reaches 87°, a January night drops to 27°, and about 9 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Oak Grove feels like
Winter
Spring
Summer
Fall
Oak Grove 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° | 27° | 3.6" | 3.0" | 13 | 3 | 29° – 45° |
| February | 52° | 30° | 3.8" | 3.0" | 13 | 2 | 30° – 50° |
| March | 60° | 36° | 4.1" | 1.1" | 14 | 1 | 41° – 58° |
| April | 71° | 44° | 3.9" | 0.1" | 12 | 0 | 52° – 62° |
| May | 78° | 52° | 4.0" | 0 | 13 | 0 | 59° – 70° |
| June | 85° | 61° | 4.0" | 0 | 12 | 0 | 69° – 76° |
| July | 87° | 65° | 4.8" | 0 | 13 | 0 | 72° – 79° |
| August | 86° | 64° | 3.7" | 0 | 11 | 0 | 71° – 80° |
| September | 82° | 57° | 3.0" | 0 | 8 | 0 | 66° – 76° |
| October | 71° | 45° | 2.7" | 0 | 9 | 0 | 54° – 64° |
| November | 60° | 35° | 3.2" | 0.3" | 10 | 0 | 41° – 53° |
| December | 50° | 30° | 3.9" | 1.7" | 12 | 1 | 30° – 51° |
| Year | 69° | 46° | 44.6" | 9.2" | 138 | 7 |
“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 Oak Grove
Oak Grove gets 45 inches of rain and melted snow a year. July is the wettest month and October the driest. Rain or snow falls on about 138 days a year. Snow covers the ground about 7 days of the year.
About 190 frost-free days a year
In half of years the last 32° night comes by April 16 and the first one by October 24. That leaves about 190 frost-free days for gardens, longer than 64% of U.S. towns.
Heating and cooling a home in Oak Grove
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Oak Grove, 79% of that work is heating and 21% 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.
Oak Grove and its neighbors
Oak Grove borders 2 towns with climate data. January nights across them vary by 0.2°. Johnson City has the coldest January nights (27°) and Spurgeon the hottest July afternoons (87°). Oak Grove’s January low is 27° and its July high 87°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Oak Grove 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 Oak Grove averaged 0.9° warmer than the 1900s. The biggest change is in December (+1.9°). The shift is smaller than in 76% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Oak Grove’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 30° to 51°. June is the most reliable, staying within 7°.
Common questions about Oak Grove’s climate
What is the coldest month in Oak Grove?
January, with a typical high of 47° and a low of 27°.
What is the hottest month in Oak Grove?
July, with a typical high of 87° and a low of 65°. About 23 days a year reach 90°.
How much snow does Oak Grove get?
About 9 inches in a normal winter, most of it in January.
When is the first frost in Oak Grove?
In half of years the first 32° night comes by October 24, and the last spring frost by April 16.
What is the rainiest month in Oak Grove?
July, with 4.8 inches of rain and melted snow. The year totals 45 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Oak Grove itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bristol Tri City Airport, TN (4 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.