Frost dates for 15275 — Pittsburgh, PA
How Pittsburgh compares
- In 8 years out of 10, the last spring frost in Pittsburgh falls between April 9 and May 12, a 33-day window. The first fall frost falls between October 9 and November 6.
- The median last frost is 4 days earlier than the Pennsylvania median of Apr 27.
- Its 183-day growing season is longer than 67% 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 114 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 9 |
| 50% (median) | April 23 |
| 10% (safe for tender plants) | May 12 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 9 |
| 50% (median) | October 23 |
| 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 15275 — Pittsburgh, PA — last frost Apr 23, first frost Oct 23, zone 6b. whenisthelastfrost.com
When to plant vegetables in Pittsburgh, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 29 – Feb 12 | Mar 26 – Apr 9 | — | — |
| Peppers | Feb 12 – Feb 26 | May 7 – May 21 | — | — |
| Eggplant | Feb 12 – Feb 26 | May 7 – May 21 | — | — |
| Tomatoes | Feb 26 – Mar 12 | Apr 30 – May 14 | — | — |
| Lettuce | Feb 26 – Mar 12 | Apr 2 – Apr 16 | Mar 26 – Apr 30 | Aug 28 – Sep 25 |
| Kale | Feb 26 – Mar 12 | Mar 26 – Apr 9 | Mar 26 – Apr 9 | Aug 14 – Sep 4 |
| Broccoli | Feb 26 – Mar 12 | Apr 9 – Apr 23 | — | Jul 17 – Aug 7 |
| Cabbage | Feb 26 – Mar 12 | Apr 2 – Apr 16 | — | Jul 17 – Aug 7 |
| Cauliflower | Feb 26 – Mar 12 | Apr 9 – Apr 23 | — | Jul 17 – Aug 7 |
| Okra | Mar 12 – Mar 26 | May 14 – May 28 | May 14 – May 28 | — |
| Basil | Mar 12 – Mar 26 | Apr 30 – May 14 | — | — |
| Peas | — | — | Mar 12 – Apr 2 | Jul 31 – Aug 21 |
| Spinach | — | — | Mar 12 – Apr 2 | Aug 28 – Sep 18 |
| Radishes | — | — | Mar 19 – Apr 30 | Sep 11 – Oct 2 |
| Cucumbers | Mar 26 – Apr 2 | May 7 – May 14 | Apr 30 – May 14 | Aug 7 – Aug 21 |
| Zucchini & Summer Squash | Mar 26 – Apr 2 | — | Apr 30 – May 14 | Aug 14 – Aug 28 |
| Winter Squash & Pumpkins | Mar 26 – Apr 2 | — | Apr 30 – May 14 | — |
| Melons & Watermelon | Mar 26 – Apr 2 | May 7 – May 21 | — | — |
| Carrots | — | — | Apr 2 – Apr 30 | Jul 31 – Aug 14 |
| Beets | — | — | Apr 2 – Apr 30 | Aug 14 – Aug 28 |
| Potatoes | — | — | Apr 2 – Apr 23 | — |
| Swiss Chard | — | — | Apr 9 – May 7 | Aug 14 – Aug 28 |
| Cilantro | — | — | Apr 9 – Apr 30 | Aug 28 – Sep 18 |
| Green Beans | — | — | Apr 30 – May 21 | Aug 7 – Aug 21 |
| Sweet Corn | — | — | Apr 30 – May 14 | — |
| Sweet Potatoes | — | May 7 – May 28 | — | — |
| Garlic | — | — | — | Oct 9 – Nov 13 |
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 Intl Ap, PA weather station, 5 km away (elevation 1,204 ft (367 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
- Oakdale Apr 23 · Oct 23
- Coraopolis Apr 23 · Oct 23
- Imperial Apr 23 · Oct 23
- Sturgeon Apr 23 · Oct 23
- Mc Kees Rocks Apr 24 · Oct 27
- Presto Apr 24 · Oct 27
- Carnegie Apr 24 · Oct 27
- Cuddy Apr 23 · Oct 23
Frequently asked questions
When is the last frost in Pittsburgh, PA?
The median last spring frost in Pittsburgh, PA is April 23. 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 23, with about a 10% chance of frost before October 9.
How long is the growing season in Pittsburgh, PA?
About 183 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.