Big Run, PA frost dates
Last spring frostMay 6median date
First fall frostOct 14median date
Growing season161 daysfrost-free
Hardiness zone6aZone 6a
How Big Run compares
- In 8 years out of 10, the last spring frost in Big Run falls between April 19 and May 23, a 34-day window. The first fall frost falls between September 29 and November 1.
- The median last frost is 9 days later than the Pennsylvania median of Apr 27.
- Its 161-day growing season is longer than 26% of the 1,787 Pennsylvania places with a regular frost season (state median 175 days).
- The last frost is 7 days later than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 138 nights a year at or below 32°F.
- Compared with Pittsburgh, PA, 112 km away, the last frost here is 12 days later than there and the growing season is 25 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 19 |
| 50% (median) | May 6 |
| 10% (safe for tender plants) | May 23 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 29 |
| 50% (median) | October 14 |
| 90% (late) | November 1 |
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 Big Run, PA
Big Run, PA frost dates — last frost May 6, first frost Oct 14, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Feb 11 to Feb 25Transplant outside: Apr 8 to Apr 22
Start indoors: Feb 25 to Mar 11Transplant outside: May 20 to Jun 3
Start indoors: Feb 25 to Mar 11Transplant outside: May 20 to Jun 3
Start indoors: Mar 11 to Mar 25Transplant outside: May 13 to May 27
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 15 to Apr 29Sow outdoors: Apr 8 to May 13Plant for fall: Aug 19 to Sep 16
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 8 to Apr 22Sow outdoors: Apr 8 to Apr 22Plant for fall: Aug 5 to Aug 26
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 15 to Apr 29Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 25 to Apr 8Transplant outside: May 27 to Jun 10Sow outdoors: May 27 to Jun 10
Start indoors: Mar 25 to Apr 8Transplant outside: May 13 to May 27
Sow outdoors: Mar 25 to Apr 15Plant for fall: Jul 22 to Aug 12
Sow outdoors: Mar 25 to Apr 15Plant for fall: Aug 19 to Sep 9
Sow outdoors: Apr 1 to May 13Plant for fall: Sep 2 to Sep 23
Start indoors: Apr 8 to Apr 15Transplant outside: May 20 to May 27Sow outdoors: May 13 to May 27Plant for fall: Jul 29 to Aug 12
Start indoors: Apr 8 to Apr 15Sow outdoors: May 13 to May 27Plant for fall: Aug 5 to Aug 19
Start indoors: Apr 8 to Apr 15Sow outdoors: May 13 to May 27
Start indoors: Apr 8 to Apr 15Transplant outside: May 20 to Jun 3
Sow outdoors: Apr 15 to May 13Plant for fall: Jul 22 to Aug 5
Sow outdoors: Apr 15 to May 13Plant for fall: Aug 5 to Aug 19
Sow outdoors: Apr 15 to May 6
Sow outdoors: Apr 22 to May 20Plant for fall: Aug 5 to Aug 19
Sow outdoors: Apr 22 to May 13Plant for fall: Aug 19 to Sep 9
Sow outdoors: May 13 to Jun 3Plant for fall: Jul 29 to Aug 12
Sow outdoors: May 13 to May 27
Transplant outside: May 20 to Jun 10
Plant for fall: Sep 30 to Nov 4
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Big Run, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 11 – Feb 25 | Apr 8 – Apr 22 | — | — |
| Peppers | Feb 25 – Mar 11 | May 20 – Jun 3 | — | — |
| Eggplant | Feb 25 – Mar 11 | May 20 – Jun 3 | — | — |
| Tomatoes | Mar 11 – Mar 25 | May 13 – May 27 | — | — |
| Lettuce | Mar 11 – Mar 25 | Apr 15 – Apr 29 | Apr 8 – May 13 | Aug 19 – Sep 16 |
| Kale | Mar 11 – Mar 25 | Apr 8 – Apr 22 | Apr 8 – Apr 22 | Aug 5 – Aug 26 |
| Broccoli | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jul 8 – Jul 29 |
| Cabbage | Mar 11 – Mar 25 | Apr 15 – Apr 29 | — | Jul 8 – Jul 29 |
| Cauliflower | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jul 8 – Jul 29 |
| Okra | Mar 25 – Apr 8 | May 27 – Jun 10 | May 27 – Jun 10 | — |
| Basil | Mar 25 – Apr 8 | May 13 – May 27 | — | — |
| Peas | — | — | Mar 25 – Apr 15 | Jul 22 – Aug 12 |
| Spinach | — | — | Mar 25 – Apr 15 | Aug 19 – Sep 9 |
| Radishes | — | — | Apr 1 – May 13 | Sep 2 – Sep 23 |
| Cucumbers | Apr 8 – Apr 15 | May 20 – May 27 | May 13 – May 27 | Jul 29 – Aug 12 |
| Zucchini & Summer Squash | Apr 8 – Apr 15 | — | May 13 – May 27 | Aug 5 – Aug 19 |
| Winter Squash & Pumpkins | Apr 8 – Apr 15 | — | May 13 – May 27 | — |
| Melons & Watermelon | Apr 8 – Apr 15 | May 20 – Jun 3 | — | — |
| Carrots | — | — | Apr 15 – May 13 | Jul 22 – Aug 5 |
| Beets | — | — | Apr 15 – May 13 | Aug 5 – Aug 19 |
| Potatoes | — | — | Apr 15 – May 6 | — |
| Swiss Chard | — | — | Apr 22 – May 20 | Aug 5 – Aug 19 |
| Cilantro | — | — | Apr 22 – May 13 | Aug 19 – Sep 9 |
| Green Beans | — | — | May 13 – Jun 3 | Jul 29 – Aug 12 |
| Sweet Corn | — | — | May 13 – May 27 | — |
| Sweet Potatoes | — | May 20 – Jun 10 | — | — |
| Garlic | — | — | — | Sep 30 – Nov 4 |
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 Dubois Jefferson Co Ap, PA weather station, 23 km away (elevation 1,814 ft (553 m)).
Frost dates near Big Run
- Stump Creek May 6 · Oct 14
- Punxsutawney May 6 · Oct 14
- Anita May 6 · Oct 14
- Troutville May 4 · Oct 13
- Walston May 10 · Oct 12
- Sykesville May 6 · Oct 14
- Rossiter May 10 · Oct 12
- Oliveburg May 10 · Oct 12
- Glen Campbell May 4 · Oct 13
- Reynoldsville May 6 · Oct 14
Frequently asked questions
When is the last frost in Big Run, PA?
The median last spring frost in Big Run, PA is May 6. There is still about a 10% chance of frost after May 23, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Big Run, PA?
The median first fall frost is October 14, with about a 10% chance of frost before September 29.
How long is the growing season in Big Run, PA?
About 161 days between the median last spring frost and first fall frost.
What planting zone is Big Run, PA?
Big Run, PA is in USDA hardiness zone 6a.