Frost dates for 17754Montoursville, PA
The average last spring frost in Montoursville is April 24 and the average first fall frost is October 23, giving a typical growing season of about 180 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 24
- Average first fall frost
- Oct 23
- Growing season
- 180 days
Safer after May 11 (1-in-10 risk)
Possible by Oct 6 (1-in-10 risk)
Last frost typically in 172 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 22 · May 6 · May 23 | Sep 28 · Oct 10 · Oct 25 | 156 days | 100% |
| Frost / freeze (32°F) | Apr 12 · Apr 24 · May 11 | Oct 6 · Oct 23 · Nov 5 | 180 days | 100% |
| Hard freeze (28°F) | Mar 29 · Apr 12 · Apr 29 | Oct 20 · Nov 3 · Nov 17 | 205 days | 100% |
Planting calendar for Montoursville
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Mar 24 – May 30 |
| Tomatoes | Transplant outdoors | May 10 – Jul 3 |
| Peppers | Start seeds indoors | Mar 24 – Apr 24 |
| Peppers | Transplant outdoors | May 24 – Jun 24 |
| Eggplant | Start seeds indoors | Apr 10 – May 9 |
| Eggplant | Transplant outdoors | May 24 – Jun 24 |
| Cucumbers | Sow outdoors | May 24 – Jul 13 |
| Summer squash | Sow outdoors | May 10 – Jun 24 |
| Winter squash & pumpkins | Sow outdoors | May 24 – Jun 24 |
| Snap beans | Sow outdoors | May 10 – Aug 5 |
| Sweet corn | Sow outdoors | May 10 – Jul 3 |
| Watermelon & cantaloupe | Sow outdoors | May 24 – Jun 24 |
| Okra | Sow outdoors | May 17 – Jun 9 |
| Peas | Sow outdoors (spring) | Mar 24 – May 9 |
| Potatoes | Plant outdoors (spring) | Mar 24 – May 24 |
| Onions | Start seeds indoors (spring) | Feb 10 – Mar 9 |
| Onions | Transplant outdoors (spring) | Apr 10 – May 9 |
| Broccoli | Start seeds indoors (spring) | Mar 6 – Apr 9 |
| Broccoli | Transplant outdoors (spring) | Apr 10 – May 9 |
| Broccoli | Start seeds indoors (fall) | Jun 23 – Jul 3 |
| Broccoli | Transplant outdoors (fall) | Jul 23 – Aug 3 |
| Cabbage | Start seeds indoors (spring) | Feb 24 – Mar 24 |
| Cabbage | Transplant outdoors (spring) | Mar 24 – Apr 24 |
| Cabbage | Start seeds indoors (fall) | Jun 13 – Jul 13 |
| Cabbage | Transplant outdoors (fall) | Jul 13 – Aug 13 |
| Leaf lettuce | Sow outdoors (spring) | Mar 24 – Jun 9 |
| Leaf lettuce | Sow outdoors (fall) | Jul 13 – Aug 29 |
| Spinach | Sow outdoors (spring) | Mar 17 – Apr 30 |
| Spinach | Sow outdoors (fall) | Jul 30 – Sep 3 |
| Radishes | Sow outdoors (spring) | Mar 24 – May 14 |
| Radishes | Sow outdoors (fall) | Jul 13 – Sep 13 |
| Kale | Sow outdoors (spring) | Apr 10 – Apr 30 |
| Kale | Sow outdoors (fall) | Jul 6 – Aug 13 |
| Carrots | Sow outdoors (spring) | Apr 24 – Jun 9 |
| Carrots | Sow outdoors (fall) | Jun 13 – Jul 29 |
| Garlic | Plant outdoors (fall) | Oct 13 – Nov 13 |
Where these dates come from
ZIP code 17754 is matched to the NOAA station Williamsport, PA, 3 km away, at 520 ft elevation (461 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Williamsport, PA (used) | 520 ft | Apr 24 | Oct 23 |
| Williamsport 2, PA | 525 ft | Apr 25 | Oct 24 |
| Lewisburg, PA | 500 ft | Apr 26 | Oct 20 |
| Laporte, PA | 1,966 ft | May 6 | Oct 7 |
Frost dates near Montoursville
- Williamsport, PA 17701 · last Apr 25, first Oct 24
- Montgomery, PA 17752 · last Apr 24, first Oct 23
- Muncy, PA 17756 · last Apr 24, first Oct 23
- Cogan Station, PA 17728 · last Apr 25, first Oct 24
- Hughesville, PA 17737 · last Apr 24, first Oct 23
- Picture Rocks, PA 17762 · last Apr 24, first Oct 23
- Allenwood, PA 17810 · last Apr 24, first Oct 23
- Dewart, PA 17730 · last Apr 24, first Oct 23
Frequently asked questions
- When is the last frost in Montoursville, PA?
- For ZIP code 17754, the average last spring frost (32°F) is April 24, based on NOAA 1991-2020 climate normals for the Williamsport, PA weather station. There is a 1-in-10 chance of a frost after May 11.
- When is the first frost in Montoursville, PA?
- The average first fall frost (32°F) is October 23. There is a 1-in-10 chance of frost by October 6, so tender plants are at risk from that point on.
- How long is the growing season in 17754?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 180 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.