Frost dates for 16239Marienville, PA
The average last spring frost in Marienville is May 24 and the average first fall frost is September 28, giving a typical growing season of about 126 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 24
- Average first fall frost
- Sep 28
- Growing season
- 126 days
Safer after Jun 7 (1-in-10 risk)
Possible by Sep 11 (1-in-10 risk)
Last frost typically in 202 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) | May 22 · Jun 6 · Jun 26 | Aug 22 · Sep 14 · Sep 30 | 97 days | 100% |
| Frost / freeze (32°F) | May 6 · May 24 · Jun 7 | Sep 11 · Sep 28 · Oct 10 | 126 days | 100% |
| Hard freeze (28°F) | Apr 24 · May 11 · May 28 | Sep 24 · Oct 8 · Oct 26 | 152 days | 100% |
Planting calendar for Marienville
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 | Apr 23 – Jun 29 |
| Tomatoes | Transplant outdoors | Jun 9 – Jun 8 |
| Peppers | Start seeds indoors | Apr 23 – May 24 |
| Peppers | Transplant outdoors | Jun 23 – Jul 24 |
| Eggplant | Start seeds indoors | May 10 – Jun 8 |
| Eggplant | Transplant outdoors | Jun 23 – Jul 24 |
| Cucumbers | Sow outdoors | Jun 23 – Jun 18 |
| Summer squash | Sow outdoors | Jun 9 – Jul 24 |
| Winter squash & pumpkins | Sow outdoors | Jun 23 – Jul 24 |
| Snap beans | Sow outdoors | Jun 9 – Jul 11 |
| Sweet corn | Sow outdoors | Jun 9 – Jun 8 |
| Watermelon & cantaloupe | Sow outdoors | Jun 23 – Jul 24 |
| Okra | Sow outdoors | Jun 16 – Jul 9 |
| Peas | Sow outdoors (spring) | Apr 23 – Jun 8 |
| Potatoes | Plant outdoors (spring) | Apr 23 – Jun 23 |
| Onions | Start seeds indoors (spring) | Mar 12 – Apr 8 |
| Onions | Transplant outdoors (spring) | May 10 – Jun 8 |
| Broccoli | Start seeds indoors (spring) | Apr 5 – May 9 |
| Broccoli | Transplant outdoors (spring) | May 10 – Jun 8 |
| Broccoli | Start seeds indoors (fall) | May 29 – Jun 8 |
| Broccoli | Transplant outdoors (fall) | Jun 28 – Jul 9 |
| Cabbage | Start seeds indoors (spring) | Mar 26 – Apr 23 |
| Cabbage | Transplant outdoors (spring) | Apr 23 – May 24 |
| Cabbage | Start seeds indoors (fall) | May 19 – Jun 18 |
| Cabbage | Transplant outdoors (fall) | Jun 18 – Jul 19 |
| Leaf lettuce | Sow outdoors (spring) | Apr 23 – Jul 9 |
| Leaf lettuce | Sow outdoors (fall) | Jun 18 – Aug 4 |
| Spinach | Sow outdoors (spring) | Apr 16 – May 30 |
| Spinach | Sow outdoors (fall) | Jul 5 – Aug 9 |
| Radishes | Sow outdoors (spring) | Apr 23 – Jun 13 |
| Radishes | Sow outdoors (fall) | Jun 18 – Aug 19 |
| Kale | Sow outdoors (spring) | May 10 – May 30 |
| Kale | Sow outdoors (fall) | Jun 11 – Jul 19 |
| Carrots | Sow outdoors (spring) | May 24 – Jul 9 |
| Carrots | Sow outdoors (fall) | May 19 – Jul 4 |
| Garlic | Plant outdoors (fall) | Sep 18 – Oct 19 |
Where these dates come from
ZIP code 16239 is matched to the NOAA station Kane 1Nne, PA, 36.2 km away, at 1,750 ft elevation (44 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Kane 1Nne, PA (used) | 1,750 ft | May 24 | Sep 28 |
| Cooksburg 2 Nw, PA | 1,450 ft | May 13 | Oct 7 |
| Tionesta 2 Se Lake, PA | 1,200 ft | May 1 | Oct 25 |
| Ridgway, PA | 1,360 ft | May 13 | Oct 11 |
Frost dates near Marienville
- Vowinckel, PA 16260 · last May 13, first Oct 7
- Crown, PA 16220 · last May 13, first Oct 7
- Cooksburg, PA 16217 · last May 13, first Oct 7
- Clarington, PA 15828 · last May 13, first Oct 7
- Leeper, PA 16233 · last May 13, first Oct 7
- Sigel, PA 15860 · last May 6, first Oct 14
- Tylersburg, PA 16361 · last May 13, first Oct 7
- Tionesta, PA 16353 · last May 1, first Oct 25
Frequently asked questions
- When is the last frost in Marienville, PA?
- For ZIP code 16239, the average last spring frost (32°F) is May 24, based on NOAA 1991-2020 climate normals for the Kane 1Nne, PA weather station. There is a 1-in-10 chance of a frost after June 7.
- When is the first frost in Marienville, PA?
- The average first fall frost (32°F) is September 28. There is a 1-in-10 chance of frost by September 11, so tender plants are at risk from that point on.
- How long is the growing season in 16239?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 126 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.