Willow Grove has chilly winters and warm summers, with plenty of rain
A typical July afternoon reaches 87°, a January night drops to 24°, and about 20 inches of snow falls in a normal winter.
A year in Willow Grove at a glance
Each month’s typical high and low, and what it brings.
What stands out about Willow Grove’s climate
Read from where Willow Grove sits among Pennsylvania’s towns. The page puts what stands out first.
What a year in Willow Grove feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Warmer than it used to be
The last 30 years in Willow Grove averaged 2.2° warmer than the 1900s. The biggest change is in December (+3.8°).
A bigger shift than in 98% of U.S. towns.
Change by month
Living with Willow Grove’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
205 frost-free days. The last frost comes by Apr 11 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 1.
About 20" a winter over 5 days with an inch or more, most in January. Snow covers the ground about 18 days a year.
Months averaging under 55° run from November through April. Heating is 83% of the year’s heating-and-cooling load.
About 22 days a year reach 90°, and July afternoons average 87°.
The nicest months are April, May, June, September and October. 0.5 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →About 205 frost-free days a year
In half of years the last 32° night comes by April 11 and the first by November 1.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
20 inches of snow, 48 of rain and melt
July is the wettest month and February the driest. Rain or snow falls on about 120 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Willow Grove and its neighbors
Upper Dublin has the coldest January nights next door (23°) and Abington the hottest July afternoons (87°). Tap a town to see its climate.
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.
How Willow Grove compares
Against every U.S. town on TownTapestry, each counted once, with its place in Pennsylvania.
Willow Grove 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 | 40° | 24° | 3.5" | 7.0" | 11 | 6 | 24° – 39° |
| February | 43° | 25° | 2.8" | 5.7" | 10 | 6 | 23° – 41° |
| March | 51° | 32° | 4.1" | 3.5" | 11 | 3 | 37° – 50° |
| April | 64° | 41° | 3.8" | 0 | 11 | 0 | 49° – 57° |
| May | 73° | 51° | 4.0" | 0 | 11 | 0 | 57° – 68° |
| June | 82° | 61° | 4.3" | 0 | 11 | 0 | 68° – 75° |
| July | 87° | 66° | 4.8" | 0 | 10 | 0 | 72° – 80° |
| August | 84° | 64° | 4.5" | 0 | 9 | 0 | 70° – 78° |
| September | 78° | 57° | 4.5" | 0 | 9 | 0 | 65° – 71° |
| October | 66° | 45° | 4.1" | 0.1" | 9 | 0 | 51° – 62° |
| November | 55° | 36° | 3.4" | 0.2" | 9 | 0 | 40° – 50° |
| December | 45° | 29° | 4.3" | 3.4" | 11 | 3 | 29° – 49° |
| Year | 64° | 44° | 48.1" | 19.9" | 120 | 18 |
Heating and cooling a home in Willow Grove
83% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
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 49°. September is the most reliable, staying within 7°.
Common questions about Willow Grove’s climate
What is the coldest month in Willow Grove?
January, with a typical high of 40° and a low of 24°.
What is the hottest month in Willow Grove?
July, with a typical high of 87° and a low of 66°. About 22 days a year reach 90°.
How much snow does Willow Grove get?
About 20 inches in a normal winter, most of it in January.
When is the first frost in Willow Grove?
In half of years the first 32° night comes by November 1, and the last spring frost by April 11.
What is the rainiest month in Willow Grove?
July, with 4.8 inches of rain and melted snow. The year totals 48 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Willow Grove.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Willow Grove itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Neshaminy Falls, PA (9 mi, snow) and Willow Grove Nas, PA (4 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. Today’s forecast: National Weather Service.