East St. Clair, PA climate
East St. Clair has chilly, snowy winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 20°, and about 38 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decade12° warmer than normal today. The forecast high is 82°, and a typical Oct 1 in East St. Clair peaks around 70°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in East St. Clair feels like
Winter
Spring
Summer
Fall
East St. Clair 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 | 38° | 20° | 2.6" | 10.3" | 12 | 13 | 20° – 38° |
| February | 41° | 21° | 2.3" | 10.3" | 11 | 12 | 20° – 40° |
| March | 50° | 28° | 3.3" | 8.0" | 12 | 7 | 33° – 50° |
| April | 63° | 37° | 3.5" | 0.5" | 13 | 0 | 45° – 56° |
| May | 73° | 47° | 4.0" | 0 | 15 | 0 | 55° – 67° |
| June | 81° | 56° | 3.8" | 0 | 13 | 0 | 65° – 71° |
| July | 85° | 60° | 3.7" | 0 | 12 | 0 | 68° – 77° |
| August | 84° | 58° | 3.5" | 0 | 12 | 0 | 67° – 75° |
| September | 77° | 51° | 3.7" | 0 | 11 | 0 | 61° – 69° |
| October | 65° | 40° | 3.1" | 0.1" | 11 | 0 | 49° – 58° |
| November | 52° | 31° | 2.8" | 1.7" | 10 | 1 | 36° – 47° |
| December | 42° | 25° | 3.0" | 6.7" | 11 | 7 | 23° – 44° |
| Year | 63° | 40° | 39.1" | 37.6" | 142 | 40 |
“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 East St. Clair
East St. Clair gets 39 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 142 days a year. Snow covers the ground about 40 days of the year.
About 167 frost-free days a year
In half of years the last 32° night comes by April 29 and the first one by October 13. That leaves about 167 frost-free days for gardens, shorter than 64% of U.S. towns.
Heating and cooling a home in East St. Clair
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In East St. Clair, 90% of that work is heating and 10% 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.
East St. Clair and its neighbors
East St. Clair borders 5 towns with climate data. January nights across them vary by 1.4°. West St. Clair has the coldest January nights (19°) and Bedford the hottest July afternoons (85°). East St. Clair’s January low is 20° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How East St. Clair 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 East St. Clair averaged 1.1° warmer than the 1900s. The biggest change is in February (+2.2°). The shift is smaller than in 64% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at East St. Clair’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 23° to 44°. June is the most reliable, staying within 7°.
Common questions about East St. Clair’s climate
What is the coldest month in East St. Clair?
January, with a typical high of 38° and a low of 20°.
What is the hottest month in East St. Clair?
July, with a typical high of 85° and a low of 60°. About 20 days a year reach 90°.
How much snow does East St. Clair get?
About 38 inches in a normal winter, most of it in January.
When is the first frost in East St. Clair?
In half of years the first 32° night comes by October 13, and the last spring frost by April 29.
What is the rainiest month in East St. Clair?
May, with 4.0 inches of rain and melted snow. The year totals 39 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for East St. Clair itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Wolfsburg, PA (6 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.