Frost dates for 15239 — Pittsburgh, PA
How Pittsburgh compares
- In 8 years out of 10, the last spring frost in Pittsburgh falls between April 7 and May 12, a 35-day window. The first fall frost falls between October 10 and November 6.
- The median last frost is 5 days earlier than the Pennsylvania median of Apr 27.
- Its 186-day growing season is longer than 69% of the 1,787 Pennsylvania places with a regular frost season (state median 175 days).
- The last frost is typical for zone 6b, where the median is Apr 22.
- The weather station records an average of 129 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 7 |
| 50% (median) | April 22 |
| 10% (safe for tender plants) | May 12 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 10 |
| 50% (median) | October 25 |
| 90% (late) | November 6 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Pittsburgh, PA
Frost dates for 15239 — Pittsburgh, PA — last frost Apr 22, first frost Oct 25, zone 6b. whenisthelastfrost.com
When to plant vegetables in Pittsburgh, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 28 – Feb 11 | Mar 25 – Apr 8 | — | — |
| Peppers | Feb 11 – Feb 25 | May 6 – May 20 | — | — |
| Eggplant | Feb 11 – Feb 25 | May 6 – May 20 | — | — |
| Tomatoes | Feb 25 – Mar 11 | Apr 29 – May 13 | — | — |
| Lettuce | Feb 25 – Mar 11 | Apr 1 – Apr 15 | Mar 25 – Apr 29 | Aug 30 – Sep 27 |
| Kale | Feb 25 – Mar 11 | Mar 25 – Apr 8 | Mar 25 – Apr 8 | Aug 16 – Sep 6 |
| Broccoli | Feb 25 – Mar 11 | Apr 8 – Apr 22 | — | Jul 19 – Aug 9 |
| Cabbage | Feb 25 – Mar 11 | Apr 1 – Apr 15 | — | Jul 19 – Aug 9 |
| Cauliflower | Feb 25 – Mar 11 | Apr 8 – Apr 22 | — | Jul 19 – Aug 9 |
| Okra | Mar 11 – Mar 25 | May 13 – May 27 | May 13 – May 27 | — |
| Basil | Mar 11 – Mar 25 | Apr 29 – May 13 | — | — |
| Peas | — | — | Mar 11 – Apr 1 | Aug 2 – Aug 23 |
| Spinach | — | — | Mar 11 – Apr 1 | Aug 30 – Sep 20 |
| Radishes | — | — | Mar 18 – Apr 29 | Sep 13 – Oct 4 |
| Cucumbers | Mar 25 – Apr 1 | May 6 – May 13 | Apr 29 – May 13 | Aug 9 – Aug 23 |
| Zucchini & Summer Squash | Mar 25 – Apr 1 | — | Apr 29 – May 13 | Aug 16 – Aug 30 |
| Winter Squash & Pumpkins | Mar 25 – Apr 1 | — | Apr 29 – May 13 | — |
| Melons & Watermelon | Mar 25 – Apr 1 | May 6 – May 20 | — | — |
| Carrots | — | — | Apr 1 – Apr 29 | Aug 2 – Aug 16 |
| Beets | — | — | Apr 1 – Apr 29 | Aug 16 – Aug 30 |
| Potatoes | — | — | Apr 1 – Apr 22 | — |
| Swiss Chard | — | — | Apr 8 – May 6 | Aug 16 – Aug 30 |
| Cilantro | — | — | Apr 8 – Apr 29 | Aug 30 – Sep 20 |
| Green Beans | — | — | Apr 29 – May 20 | Aug 9 – Aug 23 |
| Sweet Corn | — | — | Apr 29 – May 13 | — |
| Sweet Potatoes | — | May 6 – May 27 | — | — |
| Garlic | — | — | — | Oct 11 – Nov 15 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Murrysville 2 Sw, PA weather station, 8 km away (elevation 860 ft (262 m)).
ZIP codes in Pittsburgh: 15201 15202 15203 15204 15205 15206 15207 15208 15209 15210 15211 15212 15213 15214 15215 15216 15217 15218 15219 15220 15221 15222 15223 15224 15225 15226 15227 15228 15229 15230 15231 15232 15233 15234 15235 15236 15237 15238 15239 15240 15241 15242 15243 15244 15250 15251 15252 15253 15254 15255 15257 15258 15259 15260 15261 15262 15264 15265 15267 15268 …
Frost dates near Pittsburgh
- Murrysville Apr 22 · Oct 25
- Monroeville Apr 22 · Oct 25
- Springdale Apr 16 · Nov 1
- Verona Apr 16 · Nov 1
- New Kensington Apr 16 · Nov 2
- Oakmont Apr 16 · Nov 1
- Pitcairn Apr 22 · Oct 25
- Harwick Apr 16 · Nov 1
Frequently asked questions
When is the last frost in Pittsburgh, PA?
The median last spring frost in Pittsburgh, PA is April 22. There is still about a 10% chance of frost after May 12, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Pittsburgh, PA?
The median first fall frost is October 25, with about a 10% chance of frost before October 10.
How long is the growing season in Pittsburgh, PA?
About 186 days between the median last spring frost and first fall frost.
What planting zone is Pittsburgh, PA?
Pittsburgh, PA is in USDA hardiness zone 6b.