Pottstown, PA climate
Pottstown has chilly winters and warm summers. A typical July afternoon reaches 87°, a January night drops to 22°, and about 4 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Pottstown feels like
Winter
Spring
Summer
Fall
Pottstown 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 | 40° | 22° | 3.2" | 1.4" | 8 | 22° – 39° |
| February | 43° | 24° | 2.7" | 1.9" | 5 | 22° – 40° |
| March | 51° | 31° | 3.9" | 0.6" | 9 | 35° – 50° |
| April | 64° | 40° | 3.7" | 0 | 9 | 47° – 57° |
| May | 74° | 50° | 3.8" | 0 | 9 | 57° – 68° |
| June | 82° | 60° | 4.4" | 0 | 8 | 68° – 75° |
| July | 87° | 65° | 4.9" | 0 | 8 | 72° – 80° |
| August | 85° | 63° | 4.3" | 0 | 8 | 70° – 78° |
| September | 78° | 56° | 4.8" | 0 | 7 | 64° – 71° |
| October | 66° | 44° | 4.1" | 0.1" | 7 | 50° – 62° |
| November | 54° | 34° | 3.2" | 0 | 7 | 39° – 49° |
| December | 45° | 27° | 3.9" | 0.2" | 8 | 28° – 48° |
| Year | 64° | 43° | 46.8" | 4.2" | 94 |
“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 Pottstown
Pottstown gets 47 inches of rain and melted snow a year. July is the wettest month and February the driest. Rain or snow falls on about 94 days a year.
About 186 frost-free days a year
In half of years the last 32° night comes by April 20 and the first one by October 23. That leaves about 186 frost-free days for gardens, longer than 59% of U.S. towns.
Heating and cooling a home in Pottstown
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Pottstown, 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.
Pottstown and its neighbors
Pottstown borders 4 towns with climate data. January nights across them vary by 0.1°. Upper Pottsgrove has the coldest January nights (22°) and Lower Pottsgrove the hottest July afternoons (87°). Pottstown’s January low is 22° and its July high 87°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Pottstown 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 Pottstown averaged 1.9° warmer than the 1900s. The biggest change is in December (+3.5°). The shift is larger than in 91% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Pottstown’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 28° to 48°. September is the most reliable, staying within 7°.
Common questions about Pottstown’s climate
What is the coldest month in Pottstown?
January, with a typical high of 40° and a low of 22°.
What is the hottest month in Pottstown?
July, with a typical high of 87° and a low of 65°. About 17 days a year reach 90°.
How much snow does Pottstown get?
About 4 inches in a normal winter, most of it in February.
When is the first frost in Pottstown?
In half of years the first 32° night comes by October 23, and the last spring frost by April 20.
What is the rainiest month in Pottstown?
July, with 4.9 inches of rain and melted snow. The year totals 47 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Pottstown itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bechtelsville 1ene, PA (9 mi, snow) and Pottstown Limerick Airport, 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.