Photo: Dough4872 · CC BY-SA 4.0Summers, winters and rain in Royersford all run close to those of most U.S. towns
Sunny July days climb to about 88°. By precipitation alone, it ranks wetter than 72% of U.S. towns. Since 1901–2000, the year has warmed by 2.0°, most of all in December. Garden chairs stay out from April to June and September to October, the months with highs of 64–83°.
A year in Royersford at a glance
Each month’s typical high and low, and what it brings.
What stands out about Royersford’s climate
Compared with towns across the U.S., with Royersford’s place in Pennsylvania beside it.
What a year in Royersford 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, 4 miles from the town’s center, at about the same height.
The 2023 USDA map puts Royersford’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 13 inches of snow a winter
Snow, measured at Graterford 1 E, 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 104 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Royersford
87% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from November 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 Royersford’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. 0.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Royersford from natural hazards, river flooding is the largest share (75%); heat waves, cold waves, winter storms and ice storms together are 14%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Royersford and its neighbors
Every town next door is within a degree of Royersford in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Royersford’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 |
|---|---|---|---|---|
| Royersford, PA | 23° | 88° | 47" | 13" |
| Scottsburg, IN | 23° | 87° | 48" | 12" |
| Du Quoin, IL | 24° | 88° | 46" | 12" |
| Aurora, MO | 24° | 89° | 47" | 12" |
| Henderson, KY | 25° | 88° | 48" | 12" |
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 Royersford averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.6°).
A bigger shift than in 89% 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 Royersford compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Royersford’s place among Pennsylvania’s.
Royersford weather by month
Highs, lows and precipitation from NOAA’s grid at Royersford’s center; snow, wet days and snow on the ground from Graterford 1 E, PA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 40° | 23° | 3.2" | 3.9" | 8 | 23° – 39° |
| February | 43° | 24° | 2.8" | 5.4" | 6 | 22° – 41° |
| March | 51° | 31° | 4.0" | 1.3" | 9 | 35° – 50° |
| April | 64° | 41° | 3.8" | 0.1" | 10 | 48° – 57° |
| May | 74° | 51° | 3.8" | 0.0" | 10 | 58° – 69° |
| June | 83° | 60° | 4.4" | 0.0" | 9 | 68° – 75° |
| July | 88° | 66° | 4.9" | 0.0" | 10 | 72° – 80° |
| August | 86° | 64° | 4.4" | 0.0" | 9 | 70° – 78° |
| September | 78° | 56° | 4.8" | 0.0" | 8 | 64° – 71° |
| October | 66° | 44° | 4.1" | 0.0" | 9 | 51° – 63° |
| November | 55° | 35° | 3.2" | 0.0" | 8 | 39° – 50° |
| December | 45° | 28° | 4.1" | 2.2" | 9 | 29° – 48° |
| Year | 64° | 43° | 47.3" | 12.9" | 104 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 29° to 48°. September is the most reliable, staying within 7°.
Where Royersford’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 Royersford’s center.
- Snow: Graterford 1 E, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Pottstown Limerick Airport, 4 miles from the town’s center, at about the same height; 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 Royersford’s climate
What is the weather like in Royersford?
A typical July afternoon reaches 88°, a January night drops to 23°, and about 13 inches of snow falls in a normal winter. Milder January nights than 54% of U.S. towns; hotter July afternoons than 65% of U.S. towns.
How cold does it get in Royersford in winter?
January nights average 23°. About 111 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 23°.
How much snow does Royersford get?
About 13 inches in a normal winter at Graterford 1 E, PA, most of it in February.
How hot does it get in Royersford?
July, with a typical high of 88° and a low of 66°. About 17 days a year reach 90° (Pottstown Limerick Airport).
When is the first and last frost in Royersford?
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 Royersford 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 Royersford?
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 Royersford getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 89% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Royersford.
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.