Knoxville, PA climate
Knoxville has cold, snowy winters and pleasant summers. A typical July afternoon reaches 80°, a January night drops to 15°, and about 49 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Knoxville feels like
Winter
Spring
Summer
Fall
Knoxville 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 | 32° | 15° | 2.4" | 10.6" | 13 | 21 | 13° – 32° |
| February | 35° | 16° | 1.9" | 10.5" | 10 | 17 | 11° – 33° |
| March | 43° | 22° | 2.7" | 10.6" | 10 | 16 | 26° – 45° |
| April | 57° | 32° | 3.2" | 2.4" | 10 | 2 | 39° – 50° |
| May | 69° | 42° | 3.4" | 0 | 11 | 0 | 49° – 62° |
| June | 77° | 51° | 3.9" | 0 | 11 | 0 | 61° – 67° |
| July | 80° | 56° | 3.8" | 0 | 10 | 0 | 63° – 72° |
| August | 79° | 54° | 3.6" | 0 | 10 | 0 | 63° – 70° |
| September | 72° | 48° | 4.1" | 0 | 9 | 0 | 56° – 64° |
| October | 60° | 37° | 3.6" | 0.6" | 10 | 0 | 44° – 55° |
| November | 47° | 29° | 2.8" | 3.3" | 10 | 4 | 33° – 43° |
| December | 36° | 21° | 2.7" | 10.7" | 12 | 15 | 20° – 40° |
| Year | 57° | 35° | 38.0" | 48.7" | 126 | 75 |
“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 Knoxville
Knoxville gets 38 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 126 days a year. Snow covers the ground about 75 days of the year.
About 155 frost-free days a year
In half of years the last 32° night comes by May 9 and the first one by October 12. That leaves about 155 frost-free days for gardens, shorter than 76% of U.S. towns.
Heating and cooling a home in Knoxville
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Knoxville, 94% of that work is heating and 6% 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 Knoxville 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 Knoxville averaged 0.9° warmer than the 1900s. The biggest change is in December (+2.7°). The shift is smaller than in 74% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Knoxville’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 11° to 33°. June is the most reliable, staying within 7°.
Common questions about Knoxville’s climate
What is the coldest month in Knoxville?
January, with a typical high of 32° and a low of 15°.
What is the hottest month in Knoxville?
July, with a typical high of 80° and a low of 56°. About 8 days a year reach 90°.
How much snow does Knoxville get?
About 49 inches in a normal winter, most of it in December.
When is the first frost in Knoxville?
In half of years the first 32° night comes by October 12, and the last spring frost by May 9.
What is the rainiest month in Knoxville?
September, with 4.1 inches of rain and melted snow. The year totals 38 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Knoxville itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Sabinsville 3 Se, PA (8 mi, snow) and Cowanesque Dam, PA (15 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.