Photo: Dough4872 · CC BY-SA 4.0For weather, Pottstown is about as ordinary as U.S. towns get
The depth of winter brings overnight lows near 22°. Precipitation is plentiful here, more than falls on 69% of U.S. towns. Decade by decade the climate has edged up, 1.9° above 1901–2000. Keep the boiler serviced for the months from November to March, which average under 50°.
A year in Pottstown at a glance
Each month’s typical high and low, and what it brings.
What stands out about Pottstown’s climate
Compared with towns across the U.S., with Pottstown’s place in Pennsylvania beside it.
What a year in Pottstown feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 186 frost-free days a year
In half of years the last 32° night comes by April 20 and the first by October 23. Frost and day counts come from NOAA’s station at Pottstown Limerick Airport, 5 miles from the town’s center, 100 ft higher.
The 2023 USDA map puts Pottstown’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 3°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 4 inches of snow a winter
Snow, measured at Bechtelsville 1ene, PA, falls mostly in February. Precipitation (rain plus melted snow) adds up to 47 inches a year; July is the wettest month and February the driest. Rain or snow falls on about 94 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Pottstown
87% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Pottstown Limerick Airport.
Living with Pottstown’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
186 frost-free days in zone 7a. The last frost comes by Apr 20 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 23.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October. 1.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Pottstown from natural hazards, river flooding is the largest share (74%); heat waves, cold waves, winter storms and ice storms together are 14%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Pottstown and its neighbors
Every town next door is within a degree of Pottstown in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Pottstown’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Pottstown, PA | 22° | 87° | 47" | 4.2" |
| Marshfield, MO | 23° | 87° | 46" | 5.2" |
| Centralia, IL | 23° | 87° | 45" | 6.5" |
| Ashland, KY | 24° | 87° | 45" | 6.2" |
| Vincennes, IN | 23° | 88° | 47" | 8.5" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
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°).
A bigger shift than in 84% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Pottstown compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Pottstown’s place among Pennsylvania’s.
Pottstown weather by month
Highs, lows and precipitation from NOAA’s grid at Pottstown’s center; snow, wet days and snow on the ground from Bechtelsville 1ene, PA. 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" | 0.0" | 9 | 47° – 57° |
| May | 74° | 50° | 3.8" | 0.0" | 9 | 57° – 68° |
| June | 82° | 60° | 4.4" | 0.0" | 8 | 68° – 75° |
| July | 87° | 65° | 4.9" | 0.0" | 8 | 72° – 80° |
| August | 85° | 63° | 4.3" | 0.0" | 8 | 70° – 78° |
| September | 78° | 56° | 4.8" | 0.0" | 7 | 64° – 71° |
| October | 66° | 44° | 4.1" | 0.1" | 7 | 50° – 62° |
| November | 54° | 34° | 3.2" | 0.0" | 7 | 39° – 49° |
| December | 45° | 27° | 3.9" | 0.2" | 8 | 28° – 48° |
| Year | 64° | 43° | 46.8" | 4.2" | 94 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 28° to 48°. September is the most reliable, staying within 7°.
Where Pottstown’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Pottstown’s center.
- Snow: Bechtelsville 1ene, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Pottstown Limerick Airport, 5 miles from the town’s center, 100 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Pottstown’s climate
What is the weather like in Pottstown?
A typical July afternoon reaches 87°, a January night drops to 22°, and about 4 inches of snow falls in a normal winter. Milder January nights than 51% of U.S. towns; hotter July afternoons than 64% of U.S. towns.
How cold does it get in Pottstown in winter?
January nights average 22°. About 111 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 22°.
How much snow does Pottstown get?
About 4.2 inches in a normal winter at Bechtelsville 1ene, PA, most of it in February.
How hot does it get in Pottstown?
July, with a typical high of 87° and a low of 65°. About 17 days a year reach 90° (Pottstown Limerick Airport).
When is the first and last frost in Pottstown?
In half of years the last spring frost (32°) comes by April 20 and the first fall frost by October 23, about 186 frost-free days, at Pottstown Limerick Airport.
What growing zone is Pottstown in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 3°.
What is the best time of year to visit Pottstown?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Pottstown getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 84% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Pottstown.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.