Chalfont, PA climate
Chalfont has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 86°, a January night drops to 22°, and about 22 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Chalfont feels like
Winter
Spring
Summer
Fall
Chalfont 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 | 39° | 22° | 3.5" | 5.9" | 11 | 22° – 38° |
| February | 43° | 24° | 2.8" | 6.1" | 10 | 22° – 40° |
| March | 51° | 31° | 4.0" | 5.0" | 11 | 35° – 49° |
| April | 63° | 40° | 3.8" | 1.1" | 12 | 48° – 57° |
| May | 73° | 50° | 4.0" | 0 | 13 | 57° – 67° |
| June | 81° | 60° | 4.3" | 0 | 12 | 67° – 74° |
| July | 86° | 65° | 5.0" | 0 | 10 | 71° – 79° |
| August | 84° | 63° | 4.7" | 0 | 10 | 70° – 77° |
| September | 77° | 56° | 4.6" | 0 | 9 | 64° – 70° |
| October | 66° | 44° | 4.2" | 0 | 11 | 50° – 62° |
| November | 54° | 35° | 3.3" | 0.4" | 9 | 38° – 49° |
| December | 44° | 27° | 4.4" | 3.2" | 11 | 29° – 47° |
| Year | 63° | 43° | 48.5" | 21.7" | 129 |
“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 Chalfont
Chalfont gets 49 inches of rain and melted snow a year. July is the wettest month and February the driest. Rain or snow falls on about 129 days a year.
About 198 frost-free days a year
In half of years the last 32° night comes by April 13 and the first one by October 30. That leaves about 198 frost-free days for gardens, longer than 71% of U.S. towns.
Heating and cooling a home in Chalfont
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Chalfont, 84% of that work is heating and 16% 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.
Chalfont and its neighbors
Chalfont borders 2 towns with climate data. January nights across them vary by 0.4°. New Britain has both the coldest January nights (22°) and the hottest July afternoons (86°). Chalfont’s January low is 22° and its July high 86°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Chalfont 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 Chalfont averaged 2.1° warmer than the 1900s. The biggest change is in December (+3.7°). The shift is larger than in 95% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Chalfont’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 29° to 47°. June is the most reliable, staying within 7°.
Common questions about Chalfont’s climate
What is the coldest month in Chalfont?
January, with a typical high of 39° and a low of 22°.
What is the hottest month in Chalfont?
July, with a typical high of 86° and a low of 65°. About 20 days a year reach 90°.
How much snow does Chalfont get?
About 22 inches in a normal winter, most of it in February.
When is the first frost in Chalfont?
In half of years the first 32° night comes by October 30, and the last spring frost by April 13.
What is the rainiest month in Chalfont?
July, with 5.0 inches of rain and melted snow. The year totals 49 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Chalfont itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Sellersville, PA (7 mi, snow) and Doylestown 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.