Mahaffey, PA climate
Mahaffey has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 81°, a January night drops to 17°, and about 63 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Mahaffey feels like
Winter
Spring
Summer
Fall
Mahaffey 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° | 3.3" | 18.8" | 18 | 21 | 17° – 34° |
| February | 37° | 18° | 2.7" | 18.0" | 14 | 21 | 15° – 35° |
| March | 46° | 25° | 3.6" | 8.2" | 14 | 12 | 30° – 47° |
| April | 60° | 35° | 3.8" | 2.4" | 15 | 1 | 41° – 52° |
| May | 70° | 45° | 4.1" | 0.1" | 16 | 0 | 51° – 65° |
| June | 78° | 54° | 4.4" | 0 | 15 | 0 | 61° – 68° |
| July | 81° | 58° | 4.4" | 0 | 13 | 0 | 65° – 73° |
| August | 80° | 56° | 3.9" | 0 | 13 | 0 | 64° – 73° |
| September | 73° | 50° | 4.2" | 0 | 11 | 0 | 58° – 66° |
| October | 61° | 39° | 3.4" | 0.8" | 16 | 1 | 45° – 56° |
| November | 49° | 30° | 3.3" | 2.9" | 14 | 3 | 34° – 45° |
| December | 38° | 23° | 3.5" | 11.8" | 18 | 16 | 21° – 41° |
| Year | 59° | 37° | 44.6" | 63.0" | 176 | 76 |
“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 Mahaffey
Mahaffey gets 45 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 176 days a year. Snow covers the ground about 76 days of the year.
About 160 frost-free days a year
In half of years the last 32° night comes by May 4 and the first one by October 13. That leaves about 160 frost-free days for gardens, shorter than 71% of U.S. towns.
Heating and cooling a home in Mahaffey
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mahaffey, 95% of that work is heating and 5% 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 Mahaffey 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 Mahaffey averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.4°). The shift is smaller than in 53% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mahaffey’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 21° to 41°. June is the most reliable, staying within 7°.
Common questions about Mahaffey’s climate
What is the coldest month in Mahaffey?
January, with a typical high of 34° and a low of 17°.
What is the hottest month in Mahaffey?
July, with a typical high of 81° and a low of 58°. About 3 days a year reach 90°.
How much snow does Mahaffey get?
About 63 inches in a normal winter, most of it in January.
When is the first frost in Mahaffey?
In half of years the first 32° night comes by October 13, and the last spring frost by May 4.
What is the rainiest month in Mahaffey?
June, with 4.4 inches of rain and melted snow. The year totals 45 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mahaffey itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Grampian 1e, PA (10 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.