Kennett Square, PA climate
Kennett Square has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 86°, a January night drops to 23°, and about 12 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Kennett Square feels like
Winter
Spring
Summer
Fall
Kennett Square 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° | 23° | 3.5" | 5.3" | 10 | 23° – 39° |
| February | 43° | 24° | 2.8" | 4.0" | 9 | 23° – 41° |
| March | 52° | 31° | 4.3" | 1.8" | 11 | 36° – 50° |
| April | 64° | 41° | 3.8" | 0 | 10 | 49° – 58° |
| May | 73° | 51° | 3.8" | 0 | 11 | 57° – 68° |
| June | 81° | 60° | 4.4" | 0 | 10 | 67° – 75° |
| July | 86° | 65° | 4.7" | 0 | 9 | 72° – 79° |
| August | 84° | 64° | 4.5" | 0 | 9 | 70° – 77° |
| September | 78° | 57° | 4.8" | 0 | 9 | 64° – 71° |
| October | 66° | 45° | 4.2" | 0 | 8 | 51° – 62° |
| November | 55° | 35° | 3.4" | 0.1" | 8 | 39° – 50° |
| December | 45° | 28° | 4.1" | 0.8" | 10 | 28° – 48° |
| Year | 64° | 44° | 48.3" | 12.0" | 113 |
“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 Kennett Square
Kennett Square gets 48 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 113 days a year.
About 189 frost-free days a year
In half of years the last 32° night comes by April 19 and the first one by October 26. That leaves about 189 frost-free days for gardens, longer than 63% of U.S. towns.
Heating and cooling a home in Kennett Square
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Kennett Square, 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.
How Kennett Square 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 Kennett Square averaged 1.8° warmer than the 1900s. The biggest change is in December (+3.4°). The shift is larger than in 89% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Kennett Square’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 Kennett Square’s climate
What is the coldest month in Kennett Square?
January, with a typical high of 40° and a low of 23°.
What is the hottest month in Kennett Square?
July, with a typical high of 86° and a low of 65°. About 8 days a year reach 90°.
How much snow does Kennett Square get?
About 12 inches in a normal winter, most of it in January.
When is the first frost in Kennett Square?
In half of years the first 32° night comes by October 26, and the last spring frost by April 19.
What is the rainiest month in Kennett Square?
September, with 4.8 inches of rain and melted snow. The year totals 48 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Kennett Square itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Wilmington Porter Rsch, DE (10 mi, snow) and Avondale 2 N, 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.