Frost dates · Pennsylvania
When is the first frost in Pittsburgh?
Pittsburgh right now
39°FOvercast skies
- Today40°F / 39°FRain
- Tomorrow43°F / 39°FClouds
- Monday46°F / 39°FClouds
Grey. Shocking, I know.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical year, Pittsburgh’s first frost comes around October 23 and its last around April 23.
One year in ten the first frost comes as early as October 9, and nine years in ten it has arrived by November 6. One year in ten the last frost is over as early as April 9, and nine years in ten it is over by May 12. Pittsburgh averages about 114 nights a year at 32°F or colder, with about 181 frost-free days in between in a typical year. It’s frost season here, and the last frost usually comes around April 23. That makes it the 48th earliest first frost of the 117 cities we track where it freezes most years.
Last updated
No freeze in the forecast for the next 48 hours.
Pittsburgh’s last frost comes in late April, right about when the city stops arguing that spring is a myth.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Frost dates, early, typical and late years
| Early year (1 in 10) | Typical | Late year (1 in 10) | |
|---|---|---|---|
| First frost | October 9 | October 23 | November 6 |
| Last frost | April 9 | April 23 | May 12 |
A frost date here is a night when the official thermometer reads 32°F or colder. Frost on the ground can show up on clear, calm nights a few degrees milder.
Cities with about the same first frost
- Eugene, Oregon: first frost around October 23
- Peoria, Illinois: first frost around October 23
- Reno, Nevada: first frost around October 23
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00094823.