Frost dates for 15225 — Pittsburgh, PA
How Pittsburgh compares
- In 8 years out of 10, the last spring frost in Pittsburgh falls between April 9 and May 11, a 32-day window. The first fall frost falls between October 13 and November 7.
- The median last frost is 3 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 8 days later than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 107 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 9 |
| 50% (median) | April 24 |
| 10% (safe for tender plants) | May 11 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 13 |
| 50% (median) | October 27 |
| 90% (late) | November 7 |
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 15225 — Pittsburgh, PA — last frost Apr 24, first frost Oct 27, zone 7a. whenisthelastfrost.com
When to plant vegetables in Pittsburgh, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 30 – Feb 13 | Mar 27 – Apr 10 | — | — |
| Peppers | Feb 13 – Feb 27 | May 8 – May 22 | — | — |
| Eggplant | Feb 13 – Feb 27 | May 8 – May 22 | — | — |
| Tomatoes | Feb 27 – Mar 13 | May 1 – May 15 | — | — |
| Lettuce | Feb 27 – Mar 13 | Apr 3 – Apr 17 | Mar 27 – May 1 | Sep 1 – Sep 29 |
| Kale | Feb 27 – Mar 13 | Mar 27 – Apr 10 | Mar 27 – Apr 10 | Aug 18 – Sep 8 |
| Broccoli | Feb 27 – Mar 13 | Apr 10 – Apr 24 | — | Jul 21 – Aug 11 |
| Cabbage | Feb 27 – Mar 13 | Apr 3 – Apr 17 | — | Jul 21 – Aug 11 |
| Cauliflower | Feb 27 – Mar 13 | Apr 10 – Apr 24 | — | Jul 21 – Aug 11 |
| Okra | Mar 13 – Mar 27 | May 15 – May 29 | May 15 – May 29 | — |
| Basil | Mar 13 – Mar 27 | May 1 – May 15 | — | — |
| Peas | — | — | Mar 13 – Apr 3 | Aug 4 – Aug 25 |
| Spinach | — | — | Mar 13 – Apr 3 | Sep 1 – Sep 22 |
| Radishes | — | — | Mar 20 – May 1 | Sep 15 – Oct 6 |
| Cucumbers | Mar 27 – Apr 3 | May 8 – May 15 | May 1 – May 15 | Aug 11 – Aug 25 |
| Zucchini & Summer Squash | Mar 27 – Apr 3 | — | May 1 – May 15 | Aug 18 – Sep 1 |
| Winter Squash & Pumpkins | Mar 27 – Apr 3 | — | May 1 – May 15 | — |
| Melons & Watermelon | Mar 27 – Apr 3 | May 8 – May 22 | — | — |
| Carrots | — | — | Apr 3 – May 1 | Aug 4 – Aug 18 |
| Beets | — | — | Apr 3 – May 1 | Aug 18 – Sep 1 |
| Potatoes | — | — | Apr 3 – Apr 24 | — |
| Swiss Chard | — | — | Apr 10 – May 8 | Aug 18 – Sep 1 |
| Cilantro | — | — | Apr 10 – May 1 | Sep 1 – Sep 22 |
| Green Beans | — | — | May 1 – May 22 | Aug 11 – Aug 25 |
| Sweet Corn | — | — | May 1 – May 15 | — |
| Sweet Potatoes | — | May 8 – May 29 | — | — |
| Garlic | — | — | — | Oct 13 – Nov 17 |
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 Emsworth L/D Ohio Rvr, PA weather station, 2 km away (elevation 719 ft (219 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
- Mc Kees Rocks Apr 24 · Oct 27
- Sewickley Apr 8 · Nov 8
- Coraopolis Apr 23 · Oct 23
- Ingomar Apr 24 · Oct 27
- Leetsdale Apr 8 · Nov 8
- Coulters Apr 24 · Oct 27
- Crescent Apr 8 · Nov 8
- Carnegie Apr 24 · Oct 27
Frequently asked questions
When is the last frost in Pittsburgh, PA?
The median last spring frost in Pittsburgh, PA is April 24. There is still about a 10% chance of frost after May 11, 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 27, with about a 10% chance of frost before October 13.
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 7a.