Frost Dates for Upper Sainte Clair, PA

Frost Dates

Upper Sainte Clair, PA

See the average dates of the last frost of spring and the first frost of fall for your location across the U.S. and Canada.

Nearest Climate Station	Altitude	Last Spring Frost	First Fall Frost	Growing Season
PITTSBURGH ALLEGHENY CO AP, PA	1246'	Apr 24	Oct 22	180 days

Last and first frost dates are 30% probability. Calculated using 1991-2020 Climate Normals from NOAA.

Our frost dates are based on 1991–2020 climate data from the National Oceanic and Atmospheric Administration (NOAA). We use a 30% probability threshold, meaning there’s about a 3 in 10 chance frost will occur before or after the given date. Because microclimates vary—your backyard might be warmer or cooler than nearby towns—use these dates as a flexible guide, not a guarantee.