Somerset, PA climate
Somerset has chilly, snowy winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 79°, a January night drops to 17°, and about 96 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Somerset feels like
Winter
Spring
Summer
Fall
Somerset 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 | 34° | 17° | 3.8" | 27.6" | 19 | 21 | 17° – 35° |
| February | 37° | 19° | 3.4" | 23.6" | 16 | 19 | 16° – 37° |
| March | 46° | 25° | 4.1" | 15.4" | 16 | 10 | 29° – 47° |
| April | 59° | 35° | 4.2" | 3.1" | 16 | 2 | 42° – 53° |
| May | 68° | 45° | 4.9" | 0 | 16 | 0 | 50° – 64° |
| June | 76° | 53° | 4.7" | 0 | 15 | 0 | 60° – 67° |
| July | 79° | 57° | 4.7" | 0 | 13 | 0 | 64° – 73° |
| August | 78° | 55° | 4.2" | 0 | 13 | 0 | 63° – 71° |
| September | 71° | 49° | 4.0" | 0 | 11 | 0 | 57° – 65° |
| October | 61° | 38° | 3.5" | 0.9" | 13 | 0 | 46° – 55° |
| November | 48° | 30° | 3.4" | 5.9" | 14 | 4 | 32° – 45° |
| December | 38° | 22° | 4.0" | 19.7" | 18 | 14 | 20° – 41° |
| Year | 58° | 37° | 48.9" | 96.2" | 179 | 70 |
“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 Somerset
Somerset gets 49 inches of rain and melted snow a year. May is the wettest month and November the driest. Rain or snow falls on about 179 days a year. Snow covers the ground about 70 days of the year.
About 168 frost-free days a year
In half of years the last 32° night comes by May 2 and the first one by October 17. That leaves about 168 frost-free days for gardens, shorter than 63% of U.S. towns.
Heating and cooling a home in Somerset
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Somerset, 96% of that work is heating and 4% 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 Somerset 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 Somerset averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.4°). The shift is smaller than in 63% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Somerset’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 20° to 41°. June is the most reliable, staying within 6°.
Common questions about Somerset’s climate
What is the coldest month in Somerset?
January, with a typical high of 34° and a low of 17°.
What is the hottest month in Somerset?
July, with a typical high of 79° and a low of 57°.
How much snow does Somerset get?
About 96 inches in a normal winter, most of it in January.
When is the first frost in Somerset?
In half of years the first 32° night comes by October 17, and the last spring frost by May 2.
What is the rainiest month in Somerset?
May, with 4.9 inches of rain and melted snow. The year totals 49 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Somerset itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Somerset, PA (1 mi, snow) and Hidden Valley, PA (10 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.