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Weather in Upper St. Clair Township, PA · National Weather Service + NOAA

Upper St. Clair Township has the mildest winters around

Upper St. Clair Township has chilly, snowy winters and warm summers. A typical July afternoon reaches 84°, a January night drops to 22°, and about 44 inches of snow falls in a normal winter. A typical November afternoon reaches 53°, and nights fall to 34°.

Winter 40°/24°Spring 62°/40°Summer 83°/61°Fall 65°/44°
Right now
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Sunrise 6:51 am · sunset 5:16 pm

Getting the latest forecast from the National Weather Service…

What stands out about Upper St. Clair Township’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
The mildest winters aroundMilder January nights than all 6 towns around it.A long growing season193 frost-free days, from Apr 18 to Oct 28.Drier than most of Pennsylvania40 inches of rain and melted snow a year, less than 3,350 of 3,547 Pennsylvania towns.
A normal year

Where today sits in Upper St. Clair Township’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
40° / 24°
15 days with an inch or more of snow
Spring
62° / 40°
Last frost around Apr 18
Summer
83° / 61°
8 days reach 90° in a normal year
Fall now
65° / 44°
First frost around Oct 28
Pastthe usual first frost (Oct 28). Last frost next spring: Apr 18
Best months to be outside
MayJunAugSepOct
Highs of 62–84° and lows of 40° or more
How much snow does Upper St. Clair Township get?About 44 inches a winter.When is it wettest?June, with 4.2 inches.Is it warmer than it used to be?+1.2° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Upper St. Clair Township.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Upper St. Clair Township itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Pittsburgh Intl Airport, PA (12 mi, snow) and Pittsburgh Allegheny Co Airport, PA (9 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.