Mill Hall, PA frost dates
Last spring frostApr 30median date
First fall frostOct 20median date
Growing season173 daysfrost-free
Hardiness zone6bZone 6b
How Mill Hall compares
- In 8 years out of 10, the last spring frost in Mill Hall falls between April 16 and May 15, a 29-day window. The first fall frost falls between October 5 and November 1.
- The median last frost is 3 days later than the Pennsylvania median of Apr 27.
- Its 173-day growing season is longer than 41% 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 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 138 nights a year at or below 32°F.
- Compared with Harrisburg, PA, 104 km away, the last frost here is 15 days later than there and the growing season is 18 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 16 |
| 50% (median) | April 30 |
| 10% (safe for tender plants) | May 15 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 5 |
| 50% (median) | October 20 |
| 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 Mill Hall, PA
Mill Hall, PA frost dates — last frost Apr 30, first frost Oct 20, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Feb 5 to Feb 19Transplant outside: Apr 2 to Apr 16
Start indoors: Feb 19 to Mar 5Transplant outside: May 14 to May 28
Start indoors: Feb 19 to Mar 5Transplant outside: May 14 to May 28
Start indoors: Mar 5 to Mar 19Transplant outside: May 7 to May 21
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 9 to Apr 23Sow outdoors: Apr 2 to May 7Plant for fall: Aug 25 to Sep 22
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 2 to Apr 16Sow outdoors: Apr 2 to Apr 16Plant for fall: Aug 11 to Sep 1
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 16 to Apr 30Plant for fall: Jul 14 to Aug 4
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 9 to Apr 23Plant for fall: Jul 14 to Aug 4
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 16 to Apr 30Plant for fall: Jul 14 to Aug 4
Start indoors: Mar 19 to Apr 2Transplant outside: May 21 to Jun 4Sow outdoors: May 21 to Jun 4
Start indoors: Mar 19 to Apr 2Transplant outside: May 7 to May 21
Sow outdoors: Mar 19 to Apr 9Plant for fall: Jul 28 to Aug 18
Sow outdoors: Mar 19 to Apr 9Plant for fall: Aug 25 to Sep 15
Sow outdoors: Mar 26 to May 7Plant for fall: Sep 8 to Sep 29
Start indoors: Apr 2 to Apr 9Transplant outside: May 14 to May 21Sow outdoors: May 7 to May 21Plant for fall: Aug 4 to Aug 18
Start indoors: Apr 2 to Apr 9Sow outdoors: May 7 to May 21Plant for fall: Aug 11 to Aug 25
Start indoors: Apr 2 to Apr 9Sow outdoors: May 7 to May 21
Start indoors: Apr 2 to Apr 9Transplant outside: May 14 to May 28
Sow outdoors: Apr 9 to May 7Plant for fall: Jul 28 to Aug 11
Sow outdoors: Apr 9 to May 7Plant for fall: Aug 11 to Aug 25
Sow outdoors: Apr 9 to Apr 30
Sow outdoors: Apr 16 to May 14Plant for fall: Aug 11 to Aug 25
Sow outdoors: Apr 16 to May 7Plant for fall: Aug 25 to Sep 15
Sow outdoors: May 7 to May 28Plant for fall: Aug 4 to Aug 18
Sow outdoors: May 7 to May 21
Transplant outside: May 14 to Jun 4
Plant for fall: Oct 6 to Nov 10
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Mill Hall, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 5 – Feb 19 | Apr 2 – Apr 16 | — | — |
| Peppers | Feb 19 – Mar 5 | May 14 – May 28 | — | — |
| Eggplant | Feb 19 – Mar 5 | May 14 – May 28 | — | — |
| Tomatoes | Mar 5 – Mar 19 | May 7 – May 21 | — | — |
| Lettuce | Mar 5 – Mar 19 | Apr 9 – Apr 23 | Apr 2 – May 7 | Aug 25 – Sep 22 |
| Kale | Mar 5 – Mar 19 | Apr 2 – Apr 16 | Apr 2 – Apr 16 | Aug 11 – Sep 1 |
| Broccoli | Mar 5 – Mar 19 | Apr 16 – Apr 30 | — | Jul 14 – Aug 4 |
| Cabbage | Mar 5 – Mar 19 | Apr 9 – Apr 23 | — | Jul 14 – Aug 4 |
| Cauliflower | Mar 5 – Mar 19 | Apr 16 – Apr 30 | — | Jul 14 – Aug 4 |
| Okra | Mar 19 – Apr 2 | May 21 – Jun 4 | May 21 – Jun 4 | — |
| Basil | Mar 19 – Apr 2 | May 7 – May 21 | — | — |
| Peas | — | — | Mar 19 – Apr 9 | Jul 28 – Aug 18 |
| Spinach | — | — | Mar 19 – Apr 9 | Aug 25 – Sep 15 |
| Radishes | — | — | Mar 26 – May 7 | Sep 8 – Sep 29 |
| Cucumbers | Apr 2 – Apr 9 | May 14 – May 21 | May 7 – May 21 | Aug 4 – Aug 18 |
| Zucchini & Summer Squash | Apr 2 – Apr 9 | — | May 7 – May 21 | Aug 11 – Aug 25 |
| Winter Squash & Pumpkins | Apr 2 – Apr 9 | — | May 7 – May 21 | — |
| Melons & Watermelon | Apr 2 – Apr 9 | May 14 – May 28 | — | — |
| Carrots | — | — | Apr 9 – May 7 | Jul 28 – Aug 11 |
| Beets | — | — | Apr 9 – May 7 | Aug 11 – Aug 25 |
| Potatoes | — | — | Apr 9 – Apr 30 | — |
| Swiss Chard | — | — | Apr 16 – May 14 | Aug 11 – Aug 25 |
| Cilantro | — | — | Apr 16 – May 7 | Aug 25 – Sep 15 |
| Green Beans | — | — | May 7 – May 28 | Aug 4 – Aug 18 |
| Sweet Corn | — | — | May 7 – May 21 | — |
| Sweet Potatoes | — | May 14 – Jun 4 | — | — |
| Garlic | — | — | — | Oct 6 – Nov 10 |
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 Lock Haven Sewage Plt, PA weather station, 6 km away (elevation 568 ft (173 m)).
Frost dates near Mill Hall
- Mackeyville Apr 30 · Oct 20
- Castanea Apr 30 · Oct 20
- Lock Haven Apr 30 · Oct 20
- Beech Creek Apr 30 · Oct 20
- Lamar Apr 30 · Oct 20
- Blanchard Apr 30 · Oct 20
- Mc Elhattan Apr 30 · Oct 20
- Woolrich Apr 30 · Oct 20
- Loganton Apr 30 · Oct 20
- Rebersburg May 5 · Oct 6
Frequently asked questions
When is the last frost in Mill Hall, PA?
The median last spring frost in Mill Hall, PA is April 30. There is still about a 10% chance of frost after May 15, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Mill Hall, PA?
The median first fall frost is October 20, with about a 10% chance of frost before October 5.
How long is the growing season in Mill Hall, PA?
About 173 days between the median last spring frost and first fall frost.
What planting zone is Mill Hall, PA?
Mill Hall, PA is in USDA hardiness zone 6b.