Frost dates for 14711Belfast, NY
The average last spring frost in Belfast is May 21 and the average first fall frost is September 30, giving a typical growing season of about 130 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 21
- Average first fall frost
- Sep 30
- Growing season
- 130 days
Safer after Jun 6 (1-in-10 risk)
Possible by Sep 14 (1-in-10 risk)
Last frost typically in 199 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 19 · Jun 3 · Jun 20 | Sep 1 · Sep 17 · Sep 30 | 103 days | 100% |
| Frost / freeze (32°F) | May 2 · May 21 · Jun 6 | Sep 14 · Sep 30 · Oct 11 | 130 days | 100% |
| Hard freeze (28°F) | Apr 23 · May 8 · May 25 | Sep 26 · Oct 9 · Oct 25 | 153 days | 100% |
Planting calendar for Belfast
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 20 – Jun 26 |
| Tomatoes | Transplant outdoors | Jun 6 – Jun 10 |
| Peppers | Start seeds indoors | Apr 20 – May 21 |
| Peppers | Transplant outdoors | Jun 20 – Jul 21 |
| Eggplant | Start seeds indoors | May 7 – Jun 5 |
| Eggplant | Transplant outdoors | Jun 20 – Jul 21 |
| Cucumbers | Sow outdoors | Jun 20 – Jun 20 |
| Summer squash | Sow outdoors | Jun 6 – Jul 21 |
| Winter squash & pumpkins | Sow outdoors | Jun 20 – Jul 21 |
| Snap beans | Sow outdoors | Jun 6 – Jul 13 |
| Sweet corn | Sow outdoors | Jun 6 – Jun 10 |
| Watermelon & cantaloupe | Sow outdoors | Jun 20 – Jul 21 |
| Okra | Sow outdoors | Jun 13 – Jul 6 |
| Peas | Sow outdoors (spring) | Apr 20 – Jun 5 |
| Potatoes | Plant outdoors (spring) | Apr 20 – Jun 20 |
| Onions | Start seeds indoors (spring) | Mar 9 – Apr 5 |
| Onions | Transplant outdoors (spring) | May 7 – Jun 5 |
| Broccoli | Start seeds indoors (spring) | Apr 2 – May 6 |
| Broccoli | Transplant outdoors (spring) | May 7 – Jun 5 |
| Broccoli | Start seeds indoors (fall) | May 31 – Jun 10 |
| Broccoli | Transplant outdoors (fall) | Jun 30 – Jul 11 |
| Cabbage | Start seeds indoors (spring) | Mar 23 – Apr 20 |
| Cabbage | Transplant outdoors (spring) | Apr 20 – May 21 |
| Cabbage | Start seeds indoors (fall) | May 21 – Jun 20 |
| Cabbage | Transplant outdoors (fall) | Jun 20 – Jul 21 |
| Leaf lettuce | Sow outdoors (spring) | Apr 20 – Jul 6 |
| Leaf lettuce | Sow outdoors (fall) | Jun 20 – Aug 6 |
| Spinach | Sow outdoors (spring) | Apr 13 – May 27 |
| Spinach | Sow outdoors (fall) | Jul 7 – Aug 11 |
| Radishes | Sow outdoors (spring) | Apr 20 – Jun 10 |
| Radishes | Sow outdoors (fall) | Jun 20 – Aug 21 |
| Kale | Sow outdoors (spring) | May 7 – May 27 |
| Kale | Sow outdoors (fall) | Jun 13 – Jul 21 |
| Carrots | Sow outdoors (spring) | May 21 – Jul 6 |
| Carrots | Sow outdoors (fall) | May 21 – Jul 6 |
| Garlic | Plant outdoors (fall) | Sep 20 – Oct 21 |
Where these dates come from
ZIP code 14711 is matched to the NOAA station Angelica, NY, 5.9 km away, at 1,475 ft elevation (189 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Angelica, NY (used) | 1,475 ft | May 21 | Sep 30 |
| Wellsville Muni Ap, NY | 2,124 ft | May 4 | Oct 14 |
| Wellsville, NY | 1,510 ft | May 15 | Oct 2 |
| Alfred, NY | 1,924 ft | May 18 | Oct 1 |
Frost dates near Belfast
- Angelica, NY 14709 · last May 21, first Sep 30
- Caneadea, NY 14717 · last May 21, first Sep 30
- Belmont, NY 14813 · last May 21, first Sep 30
- Black Creek, NY 14714 · last May 14, first Oct 6
- Fillmore, NY 14735 · last May 21, first Sep 30
- Houghton, NY 14744 · last May 14, first Oct 6
- Friendship, NY 14739 · last May 15, first Oct 2
- Rushford, NY 14777 · last May 21, first Sep 30
Frequently asked questions
- When is the last frost in Belfast, NY?
- For ZIP code 14711, the average last spring frost (32°F) is May 21, based on NOAA 1991-2020 climate normals for the Angelica, NY weather station. There is a 1-in-10 chance of a frost after June 6.
- When is the first frost in Belfast, NY?
- The average first fall frost (32°F) is September 30. There is a 1-in-10 chance of frost by September 14, so tender plants are at risk from that point on.
- How long is the growing season in 14711?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 130 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.