Milroy, PA frost dates
Last spring frostApr 21median date
First fall frostOct 24median date
Growing season186 daysfrost-free
Hardiness zone6bZone 6b
How Milroy compares
- In 8 years out of 10, the last spring frost in Milroy falls between April 6 and May 9, a 33-day window. The first fall frost falls between October 7 and November 7.
- The median last frost is 6 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 122 nights a year at or below 32°F.
- Compared with Harrisburg, PA, 77 km away, the last frost here is 6 days later than there and the growing season is 5 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 6 |
| 50% (median) | April 21 |
| 10% (safe for tender plants) | May 9 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 7 |
| 50% (median) | October 24 |
| 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 Milroy, PA
Milroy, PA frost dates — last frost Apr 21, first frost Oct 24, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Jan 27 to Feb 10Transplant outside: Mar 24 to Apr 7
Start indoors: Feb 10 to Feb 24Transplant outside: May 5 to May 19
Start indoors: Feb 10 to Feb 24Transplant outside: May 5 to May 19
Start indoors: Feb 24 to Mar 10Transplant outside: Apr 28 to May 12
Start indoors: Feb 24 to Mar 10Transplant outside: Mar 31 to Apr 14Sow outdoors: Mar 24 to Apr 28Plant for fall: Aug 29 to Sep 26
Start indoors: Feb 24 to Mar 10Transplant outside: Mar 24 to Apr 7Sow outdoors: Mar 24 to Apr 7Plant for fall: Aug 15 to Sep 5
Start indoors: Feb 24 to Mar 10Transplant outside: Apr 7 to Apr 21Plant for fall: Jul 18 to Aug 8
Start indoors: Feb 24 to Mar 10Transplant outside: Mar 31 to Apr 14Plant for fall: Jul 18 to Aug 8
Start indoors: Feb 24 to Mar 10Transplant outside: Apr 7 to Apr 21Plant for fall: Jul 18 to Aug 8
Start indoors: Mar 10 to Mar 24Transplant outside: May 12 to May 26Sow outdoors: May 12 to May 26
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 28 to May 12
Sow outdoors: Mar 10 to Mar 31Plant for fall: Aug 1 to Aug 22
Sow outdoors: Mar 10 to Mar 31Plant for fall: Aug 29 to Sep 19
Sow outdoors: Mar 17 to Apr 28Plant for fall: Sep 12 to Oct 3
Start indoors: Mar 24 to Mar 31Transplant outside: May 5 to May 12Sow outdoors: Apr 28 to May 12Plant for fall: Aug 8 to Aug 22
Start indoors: Mar 24 to Mar 31Sow outdoors: Apr 28 to May 12Plant for fall: Aug 15 to Aug 29
Start indoors: Mar 24 to Mar 31Sow outdoors: Apr 28 to May 12
Start indoors: Mar 24 to Mar 31Transplant outside: May 5 to May 19
Sow outdoors: Mar 31 to Apr 28Plant for fall: Aug 1 to Aug 15
Sow outdoors: Mar 31 to Apr 28Plant for fall: Aug 15 to Aug 29
Sow outdoors: Mar 31 to Apr 21
Sow outdoors: Apr 7 to May 5Plant for fall: Aug 15 to Aug 29
Sow outdoors: Apr 7 to Apr 28Plant for fall: Aug 29 to Sep 19
Sow outdoors: Apr 28 to May 19Plant for fall: Aug 8 to Aug 22
Sow outdoors: Apr 28 to May 12
Transplant outside: May 5 to May 26
Plant for fall: Oct 10 to Nov 14
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Milroy, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 27 – Feb 10 | Mar 24 – Apr 7 | — | — |
| Peppers | Feb 10 – Feb 24 | May 5 – May 19 | — | — |
| Eggplant | Feb 10 – Feb 24 | May 5 – May 19 | — | — |
| Tomatoes | Feb 24 – Mar 10 | Apr 28 – May 12 | — | — |
| Lettuce | Feb 24 – Mar 10 | Mar 31 – Apr 14 | Mar 24 – Apr 28 | Aug 29 – Sep 26 |
| Kale | Feb 24 – Mar 10 | Mar 24 – Apr 7 | Mar 24 – Apr 7 | Aug 15 – Sep 5 |
| Broccoli | Feb 24 – Mar 10 | Apr 7 – Apr 21 | — | Jul 18 – Aug 8 |
| Cabbage | Feb 24 – Mar 10 | Mar 31 – Apr 14 | — | Jul 18 – Aug 8 |
| Cauliflower | Feb 24 – Mar 10 | Apr 7 – Apr 21 | — | Jul 18 – Aug 8 |
| Okra | Mar 10 – Mar 24 | May 12 – May 26 | May 12 – May 26 | — |
| Basil | Mar 10 – Mar 24 | Apr 28 – May 12 | — | — |
| Peas | — | — | Mar 10 – Mar 31 | Aug 1 – Aug 22 |
| Spinach | — | — | Mar 10 – Mar 31 | Aug 29 – Sep 19 |
| Radishes | — | — | Mar 17 – Apr 28 | Sep 12 – Oct 3 |
| Cucumbers | Mar 24 – Mar 31 | May 5 – May 12 | Apr 28 – May 12 | Aug 8 – Aug 22 |
| Zucchini & Summer Squash | Mar 24 – Mar 31 | — | Apr 28 – May 12 | Aug 15 – Aug 29 |
| Winter Squash & Pumpkins | Mar 24 – Mar 31 | — | Apr 28 – May 12 | — |
| Melons & Watermelon | Mar 24 – Mar 31 | May 5 – May 19 | — | — |
| Carrots | — | — | Mar 31 – Apr 28 | Aug 1 – Aug 15 |
| Beets | — | — | Mar 31 – Apr 28 | Aug 15 – Aug 29 |
| Potatoes | — | — | Mar 31 – Apr 21 | — |
| Swiss Chard | — | — | Apr 7 – May 5 | Aug 15 – Aug 29 |
| Cilantro | — | — | Apr 7 – Apr 28 | Aug 29 – Sep 19 |
| Green Beans | — | — | Apr 28 – May 19 | Aug 8 – Aug 22 |
| Sweet Corn | — | — | Apr 28 – May 12 | — |
| Sweet Potatoes | — | May 5 – May 26 | — | — |
| Garlic | — | — | — | Oct 10 – Nov 14 |
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 Lewistown, PA weather station, 15 km away (elevation 459 ft (140 m)).
Frost dates near Milroy
- Reedsville Apr 21 · Oct 24
- Yeagertown Apr 21 · Oct 24
- Burnham Apr 21 · Oct 24
- Lewistown Apr 21 · Oct 24
- Centre Hall Apr 20 · Oct 26
- Spring Mills May 5 · Oct 6
- Mc Clure Apr 21 · Oct 24
- Coburn May 5 · Oct 6
- Granville Apr 21 · Oct 24
- Belleville Apr 21 · Oct 24
Frequently asked questions
When is the last frost in Milroy, PA?
The median last spring frost in Milroy, PA is April 21. There is still about a 10% chance of frost after May 9, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Milroy, PA?
The median first fall frost is October 24, with about a 10% chance of frost before October 7.
How long is the growing season in Milroy, PA?
About 186 days between the median last spring frost and first fall frost.
What planting zone is Milroy, PA?
Milroy, PA is in USDA hardiness zone 6b.