Hartley, PA climate
Hartley has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 80°, a January night drops to 18°, and about 34 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Hartley feels like
Winter
Spring
Summer
Fall
Hartley 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 32° | 18° | 3.2" | 10.7" | 11 | 16° – 33° |
| February | 36° | 19° | 2.5" | 7.7" | 9 | 15° – 34° |
| March | 45° | 26° | 3.5" | 6.9" | 9 | 29° – 46° |
| April | 59° | 37° | 3.8" | 0.1" | 10 | 42° – 53° |
| May | 69° | 47° | 4.3" | 0 | 10 | 53° – 64° |
| June | 76° | 56° | 4.2" | 0 | 11 | 62° – 69° |
| July | 80° | 60° | 4.3" | 0 | 9 | 66° – 74° |
| August | 79° | 59° | 3.9" | 0 | 9 | 65° – 73° |
| September | 72° | 53° | 4.7" | 0 | 9 | 60° – 66° |
| October | 60° | 42° | 4.1" | 0.3" | 8 | 46° – 58° |
| November | 48° | 32° | 3.3" | 1.4" | 8 | 34° – 45° |
| December | 37° | 23° | 3.4" | 6.6" | 9 | 22° – 39° |
| Year | 58° | 39° | 45.3" | 33.7" | 111 |
“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 Hartley
Hartley gets 45 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 111 days a year.
About 175 frost-free days a year
In half of years the last 32° night comes by April 25 and the first one by October 19. That leaves about 175 frost-free days for gardens, shorter than 54% of U.S. towns.
Heating and cooling a home in Hartley
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Hartley, 87% of that work is heating and 13% 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.
Hartley and its neighbors
Hartley borders 4 towns with climate data. January nights across them vary by 2.2°. Haines has the coldest January nights (18°) and Hartleton the hottest July afternoons (85°). Hartley’s January low is 18° and its July high 80°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Hartley 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 Hartley averaged 1.0° warmer than the 1900s. The biggest change is in December (+2.5°). The shift is smaller than in 70% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Hartley’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 34°. June is the most reliable, staying within 6°.
Common questions about Hartley’s climate
What is the coldest month in Hartley?
January, with a typical high of 32° and a low of 18°.
What is the hottest month in Hartley?
July, with a typical high of 80° and a low of 60°. About 24 days a year reach 90°.
How much snow does Hartley get?
About 34 inches in a normal winter, most of it in January.
When is the first frost in Hartley?
In half of years the first 32° night comes by October 19, and the last spring frost by April 25.
What is the rainiest month in Hartley?
September, with 4.7 inches of rain and melted snow. The year totals 45 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Hartley itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Beavertown 1 Ne, PA (10 mi, snow) and Laurelton Ctr, PA (3 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.