Plain Grove, PA climate
Plain Grove has chilly winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 19°, and about 28 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Plain Grove feels like
Winter
Spring
Summer
Fall
Plain 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 | 35° | 19° | 3.1" | 10.1" | 16 | 16 | 18° – 37° |
| February | 38° | 20° | 2.5" | 7.7" | 12 | 12 | 15° – 38° |
| March | 48° | 27° | 3.3" | 3.7" | 12 | 5 | 31° – 49° |
| April | 61° | 37° | 3.9" | 0.3" | 15 | 0 | 43° – 54° |
| May | 71° | 47° | 4.1" | 0 | 14 | 0 | 52° – 66° |
| June | 79° | 55° | 4.7" | 0 | 13 | 0 | 63° – 70° |
| July | 83° | 59° | 4.6" | 0 | 12 | 0 | 67° – 75° |
| August | 82° | 58° | 3.9" | 0 | 11 | 0 | 66° – 74° |
| September | 75° | 52° | 4.0" | 0 | 11 | 0 | 60° – 68° |
| October | 63° | 41° | 3.3" | 0 | 12 | 0 | 48° – 58° |
| November | 50° | 32° | 3.2" | 0.8" | 13 | 2 | 36° – 47° |
| December | 39° | 25° | 3.3" | 4.9" | 14 | 7 | 22° – 43° |
| Year | 60° | 39° | 44.0" | 27.5" | 156 | 42 |
“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 Plain Grove
Plain Grove gets 44 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 156 days a year. Snow covers the ground about 42 days of the year.
About 158 frost-free days a year
In half of years the last 32° night comes by May 7 and the first one by October 14. That leaves about 158 frost-free days for gardens, shorter than 73% of U.S. towns.
Heating and cooling a home in Plain Grove
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Plain Grove, 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.
Plain Grove and its neighbors
Plain Grove borders 3 towns with climate data. January nights across them vary by 0.6°. Liberty has the coldest January nights (18°) and Scott the hottest July afternoons (83°). Plain Grove’s January low is 19° and its July high 83°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Plain 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 Plain Grove averaged 1.5° warmer than the 1900s. The biggest change is in December (+2.7°). The shift is larger than in 71% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Plain Grove’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 15° to 38°. June is the most reliable, staying within 7°.
Common questions about Plain Grove’s climate
What is the coldest month in Plain Grove?
January, with a typical high of 35° and a low of 19°.
What is the hottest month in Plain Grove?
July, with a typical high of 83° and a low of 59°. About 13 days a year reach 90°.
How much snow does Plain Grove get?
About 28 inches in a normal winter, most of it in January.
When is the first frost in Plain Grove?
In half of years the first 32° night comes by October 14, and the last spring frost by May 7.
What is the rainiest month in Plain Grove?
June, with 4.7 inches of rain and melted snow. The year totals 44 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Plain Grove itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at New Castle 1 N, PA (12 mi, snow) and Slippery Rock 1 Ssw, PA (5 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.