Frost dates for 15219 — Pittsburgh, PA
How Pittsburgh compares
- In 8 years out of 10, the last spring frost in Pittsburgh falls between April 2 and May 6, a 34-day window. The first fall frost falls between October 14 and November 10.
- The median last frost is 9 days earlier than the Pennsylvania median of Apr 27.
- Its 193-day growing season is longer than 86% of the 1,787 Pennsylvania places with a regular frost season (state median 175 days).
- The last frost is 4 days earlier than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 106 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 2 |
| 50% (median) | April 18 |
| 10% (safe for tender plants) | May 6 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 14 |
| 50% (median) | October 28 |
| 90% (late) | November 10 |
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 15219 — Pittsburgh, PA — last frost Apr 18, first frost Oct 28, zone 6b. whenisthelastfrost.com
When to plant vegetables in Pittsburgh, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 24 – Feb 7 | Mar 21 – Apr 4 | — | — |
| Peppers | Feb 7 – Feb 21 | May 2 – May 16 | — | — |
| Eggplant | Feb 7 – Feb 21 | May 2 – May 16 | — | — |
| Tomatoes | Feb 21 – Mar 7 | Apr 25 – May 9 | — | — |
| Lettuce | Feb 21 – Mar 7 | Mar 28 – Apr 11 | Mar 21 – Apr 25 | Sep 2 – Sep 30 |
| Kale | Feb 21 – Mar 7 | Mar 21 – Apr 4 | Mar 21 – Apr 4 | Aug 19 – Sep 9 |
| Broccoli | Feb 21 – Mar 7 | Apr 4 – Apr 18 | — | Jul 22 – Aug 12 |
| Cabbage | Feb 21 – Mar 7 | Mar 28 – Apr 11 | — | Jul 22 – Aug 12 |
| Cauliflower | Feb 21 – Mar 7 | Apr 4 – Apr 18 | — | Jul 22 – Aug 12 |
| Okra | Mar 7 – Mar 21 | May 9 – May 23 | May 9 – May 23 | — |
| Basil | Mar 7 – Mar 21 | Apr 25 – May 9 | — | — |
| Peas | — | — | Mar 7 – Mar 28 | Aug 5 – Aug 26 |
| Spinach | — | — | Mar 7 – Mar 28 | Sep 2 – Sep 23 |
| Radishes | — | — | Mar 14 – Apr 25 | Sep 16 – Oct 7 |
| Cucumbers | Mar 21 – Mar 28 | May 2 – May 9 | Apr 25 – May 9 | Aug 12 – Aug 26 |
| Zucchini & Summer Squash | Mar 21 – Mar 28 | — | Apr 25 – May 9 | Aug 19 – Sep 2 |
| Winter Squash & Pumpkins | Mar 21 – Mar 28 | — | Apr 25 – May 9 | — |
| Melons & Watermelon | Mar 21 – Mar 28 | May 2 – May 16 | — | — |
| Carrots | — | — | Mar 28 – Apr 25 | Aug 5 – Aug 19 |
| Beets | — | — | Mar 28 – Apr 25 | Aug 19 – Sep 2 |
| Potatoes | — | — | Mar 28 – Apr 18 | — |
| Swiss Chard | — | — | Apr 4 – May 2 | Aug 19 – Sep 2 |
| Cilantro | — | — | Apr 4 – Apr 25 | Sep 2 – Sep 23 |
| Green Beans | — | — | Apr 25 – May 16 | Aug 12 – Aug 26 |
| Sweet Corn | — | — | Apr 25 – May 9 | — |
| Sweet Potatoes | — | May 2 – May 23 | — | — |
| Garlic | — | — | — | Oct 14 – Nov 18 |
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 Pittsburgh Allegheny Co Ap, PA weather station, 11 km away (elevation 1,247 ft (380 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
- Coulters Apr 24 · Oct 27
- West Mifflin Apr 18 · Oct 28
- Homestead Apr 5 · Nov 10
- Mc Kees Rocks Apr 24 · Oct 27
- Carnegie Apr 24 · Oct 27
- Glenshaw Apr 24 · Oct 27
- Braddock Apr 5 · Nov 10
- Dravosburg Apr 18 · Oct 28
Frequently asked questions
When is the last frost in Pittsburgh, PA?
The median last spring frost in Pittsburgh, PA is April 18. There is still about a 10% chance of frost after May 6, 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 28, with about a 10% chance of frost before October 14.
How long is the growing season in Pittsburgh, PA?
About 193 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.