Frost dates for 12170Stillwater, NY
The average last spring frost in Stillwater is May 2 and the average first fall frost is October 7, giving a typical growing season of about 158 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 2
- Average first fall frost
- Oct 7
- Growing season
- 158 days
Safer after May 17 (1-in-10 risk)
Possible by Sep 27 (1-in-10 risk)
Last frost typically in 180 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 30 · May 15 · May 29 | Sep 17 · Sep 29 · Oct 10 | 138 days | 100% |
| Frost / freeze (32°F) | Apr 21 · May 2 · May 17 | Sep 27 · Oct 7 · Oct 25 | 158 days | 100% |
| Hard freeze (28°F) | Apr 8 · Apr 20 · May 4 | Oct 5 · Oct 21 · Nov 5 | 183 days | 100% |
Planting calendar for Stillwater
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 1 – Jun 7 |
| Tomatoes | Transplant outdoors | May 18 – Jun 17 |
| Peppers | Start seeds indoors | Apr 1 – May 2 |
| Peppers | Transplant outdoors | Jun 1 – Jul 2 |
| Eggplant | Start seeds indoors | Apr 18 – May 17 |
| Eggplant | Transplant outdoors | Jun 1 – Jul 2 |
| Cucumbers | Sow outdoors | Jun 1 – Jun 27 |
| Summer squash | Sow outdoors | May 18 – Jul 2 |
| Winter squash & pumpkins | Sow outdoors | Jun 1 – Jul 2 |
| Snap beans | Sow outdoors | May 18 – Jul 20 |
| Sweet corn | Sow outdoors | May 18 – Jun 17 |
| Watermelon & cantaloupe | Sow outdoors | Jun 1 – Jul 2 |
| Okra | Sow outdoors | May 25 – Jun 17 |
| Peas | Sow outdoors (spring) | Apr 1 – May 17 |
| Potatoes | Plant outdoors (spring) | Apr 1 – Jun 1 |
| Onions | Start seeds indoors (spring) | Feb 18 – Mar 17 |
| Onions | Transplant outdoors (spring) | Apr 18 – May 17 |
| Broccoli | Start seeds indoors (spring) | Mar 14 – Apr 17 |
| Broccoli | Transplant outdoors (spring) | Apr 18 – May 17 |
| Broccoli | Start seeds indoors (fall) | Jun 7 – Jun 17 |
| Broccoli | Transplant outdoors (fall) | Jul 7 – Jul 18 |
| Cabbage | Start seeds indoors (spring) | Mar 4 – Apr 1 |
| Cabbage | Transplant outdoors (spring) | Apr 1 – May 2 |
| Cabbage | Start seeds indoors (fall) | May 28 – Jun 27 |
| Cabbage | Transplant outdoors (fall) | Jun 27 – Jul 28 |
| Leaf lettuce | Sow outdoors (spring) | Apr 1 – Jun 17 |
| Leaf lettuce | Sow outdoors (fall) | Jun 27 – Aug 13 |
| Spinach | Sow outdoors (spring) | Mar 25 – May 8 |
| Spinach | Sow outdoors (fall) | Jul 14 – Aug 18 |
| Radishes | Sow outdoors (spring) | Apr 1 – May 22 |
| Radishes | Sow outdoors (fall) | Jun 27 – Aug 28 |
| Kale | Sow outdoors (spring) | Apr 18 – May 8 |
| Kale | Sow outdoors (fall) | Jun 20 – Jul 28 |
| Carrots | Sow outdoors (spring) | May 2 – Jun 17 |
| Carrots | Sow outdoors (fall) | May 28 – Jul 13 |
| Garlic | Plant outdoors (fall) | Sep 27 – Oct 28 |
Where these dates come from
ZIP code 12170 is matched to the NOAA station Saratoga Springs 4 Sw, NY, 13.7 km away, at 326 ft elevation (77 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Saratoga Springs 4 Sw, NY (used) | 326 ft | May 2 | Oct 7 |
| Buskirk, NY | 499 ft | May 6 | Oct 6 |
| Troy L&D, NY | 15 ft | Apr 19 | Oct 26 |
| Grafton, NY | 1,560 ft | May 1 | Oct 11 |
Frost dates near Stillwater
- Saratoga Springs, NY 12866 · last May 2, first Oct 7
- Schaghticoke, NY 12154 · last May 2, first Oct 7
- Mechanicville, NY 12118 · last Apr 19, first Oct 26
- Schuylerville, NY 12871 · last May 2, first Oct 7
- Victory Mills, NY 12884 · last May 2, first Oct 7
- Round Lake, NY 12151 · last May 2, first Oct 7
- Ballston Spa, NY 12020 · last May 2, first Oct 7
- Middle Falls, NY 12848 · last May 2, first Oct 7
Frequently asked questions
- When is the last frost in Stillwater, NY?
- For ZIP code 12170, the average last spring frost (32°F) is May 2, based on NOAA 1991-2020 climate normals for the Saratoga Springs 4 Sw, NY weather station. There is a 1-in-10 chance of a frost after May 17.
- When is the first frost in Stillwater, NY?
- The average first fall frost (32°F) is October 7. There is a 1-in-10 chance of frost by September 27, so tender plants are at risk from that point on.
- How long is the growing season in 12170?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 158 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.