Grugan, PA climate
Grugan has chilly, snowy winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 18°, and about 33 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Grugan feels like
Winter
Spring
Summer
Fall
Grugan 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° | 18° | 2.9" | 9.0" | 14 | 15 | 18° – 35° |
| February | 39° | 19° | 2.3" | 9.5" | 12 | 13 | 16° – 37° |
| March | 48° | 26° | 3.2" | 5.2" | 12 | 7 | 30° – 48° |
| April | 62° | 36° | 3.6" | 0.7" | 14 | 0 | 43° – 54° |
| May | 73° | 46° | 4.1" | 0 | 14 | 0 | 53° – 65° |
| June | 81° | 55° | 3.9" | 0 | 13 | 0 | 64° – 71° |
| July | 85° | 59° | 4.2" | 0 | 12 | 0 | 67° – 76° |
| August | 83° | 58° | 3.7" | 0 | 11 | 0 | 66° – 75° |
| September | 76° | 51° | 4.3" | 0 | 11 | 0 | 61° – 67° |
| October | 63° | 40° | 3.7" | 0.1" | 13 | 0 | 47° – 58° |
| November | 50° | 31° | 3.2" | 1.5" | 12 | 1 | 36° – 45° |
| December | 39° | 24° | 3.2" | 6.7" | 14 | 8 | 23° – 41° |
| Year | 61° | 38° | 42.1" | 32.7" | 150 | 43 |
“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 Grugan
Grugan gets 42 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 150 days a year. Snow covers the ground about 43 days of the year.
About 173 frost-free days a year
In half of years the last 32° night comes by April 30 and the first one by October 22. That leaves about 173 frost-free days for gardens, shorter than 57% of U.S. towns.
Heating and cooling a home in Grugan
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Grugan, 91% of that work is heating and 9% 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.
Grugan and its neighbors
Grugan borders 6 towns with climate data. January nights across them vary by 2.9°. McHenry has the coldest January nights (16°) and Bald Eagle the hottest July afternoons (84°). Grugan’s January low is 18° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Grugan 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 Grugan averaged 0.9° warmer than the 1900s. The biggest change is in December (+2.3°). The shift is smaller than in 81% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Grugan’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 16° to 37°. September is the most reliable, staying within 6°.
Common questions about Grugan’s climate
What is the coldest month in Grugan?
January, with a typical high of 35° and a low of 18°.
What is the hottest month in Grugan?
July, with a typical high of 85° and a low of 59°. About 13 days a year reach 90°.
How much snow does Grugan get?
About 33 inches in a normal winter, most of it in February.
When is the first frost in Grugan?
In half of years the first 32° night comes by October 22, and the last spring frost by April 30.
What is the rainiest month in Grugan?
September, with 4.3 inches of rain and melted snow. The year totals 42 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Grugan itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Renovo, PA (7 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.