Frost dates for 13630De Kalb Junction, NY
The average last spring frost in De Kalb Junction is May 9 and the average first fall frost is September 30, giving a typical growing season of about 142 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 9
- Average first fall frost
- Sep 30
- Growing season
- 142 days
Safer after May 25 (1-in-10 risk)
Possible by Sep 16 (1-in-10 risk)
Last frost typically in 187 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 7 · May 22 · Jun 7 | Sep 2 · Sep 19 · Oct 3 | 118 days | 100% |
| Frost / freeze (32°F) | Apr 27 · May 9 · May 25 | Sep 16 · Sep 30 · Oct 14 | 142 days | 100% |
| Hard freeze (28°F) | Apr 18 · Apr 30 · May 14 | Sep 25 · Oct 11 · Oct 31 | 165 days | 100% |
Planting calendar for De Kalb Junction
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 8 – Jun 14 |
| Tomatoes | Transplant outdoors | May 25 – Jun 10 |
| Peppers | Start seeds indoors | Apr 8 – May 9 |
| Peppers | Transplant outdoors | Jun 8 – Jul 9 |
| Eggplant | Start seeds indoors | Apr 25 – May 24 |
| Eggplant | Transplant outdoors | Jun 8 – Jul 9 |
| Cucumbers | Sow outdoors | Jun 8 – Jun 20 |
| Summer squash | Sow outdoors | May 25 – Jul 9 |
| Winter squash & pumpkins | Sow outdoors | Jun 8 – Jul 9 |
| Snap beans | Sow outdoors | May 25 – Jul 13 |
| Sweet corn | Sow outdoors | May 25 – Jun 10 |
| Watermelon & cantaloupe | Sow outdoors | Jun 8 – Jul 9 |
| Okra | Sow outdoors | Jun 1 – Jun 24 |
| Peas | Sow outdoors (spring) | Apr 8 – May 24 |
| Potatoes | Plant outdoors (spring) | Apr 8 – Jun 8 |
| Onions | Start seeds indoors (spring) | Feb 25 – Mar 24 |
| Onions | Transplant outdoors (spring) | Apr 25 – May 24 |
| Broccoli | Start seeds indoors (spring) | Mar 21 – Apr 24 |
| Broccoli | Transplant outdoors (spring) | Apr 25 – May 24 |
| Broccoli | Start seeds indoors (fall) | May 31 – Jun 10 |
| Broccoli | Transplant outdoors (fall) | Jun 30 – Jul 11 |
| Cabbage | Start seeds indoors (spring) | Mar 11 – Apr 8 |
| Cabbage | Transplant outdoors (spring) | Apr 8 – May 9 |
| Cabbage | Start seeds indoors (fall) | May 21 – Jun 20 |
| Cabbage | Transplant outdoors (fall) | Jun 20 – Jul 21 |
| Leaf lettuce | Sow outdoors (spring) | Apr 8 – Jun 24 |
| Leaf lettuce | Sow outdoors (fall) | Jun 20 – Aug 6 |
| Spinach | Sow outdoors (spring) | Apr 1 – May 15 |
| Spinach | Sow outdoors (fall) | Jul 7 – Aug 11 |
| Radishes | Sow outdoors (spring) | Apr 8 – May 29 |
| Radishes | Sow outdoors (fall) | Jun 20 – Aug 21 |
| Kale | Sow outdoors (spring) | Apr 25 – May 15 |
| Kale | Sow outdoors (fall) | Jun 13 – Jul 21 |
| Carrots | Sow outdoors (spring) | May 9 – Jun 24 |
| Carrots | Sow outdoors (fall) | May 21 – Jul 6 |
| Garlic | Plant outdoors (fall) | Sep 20 – Oct 21 |
Where these dates come from
ZIP code 13630 is matched to the NOAA station Canton 4 Se, NY, 17.1 km away, at 448 ft elevation (41 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Canton 4 Se, NY (used) | 448 ft | May 9 | Sep 30 |
| Gouverneur 3 Nw, NY | 420 ft | May 14 | Sep 26 |
| Colton 2 N, NY | 580 ft | May 5 | Oct 8 |
| Ogdensburg 4 Ne, NY | 280 ft | Apr 29 | Oct 10 |
Frost dates near De Kalb Junction
- Pyrites, NY 13677 · last May 9, first Sep 30
- Hermon, NY 13652 · last May 9, first Sep 30
- Richville, NY 13681 · last May 14, first Sep 26
- Rensselaer Falls, NY 13680 · last Apr 29, first Oct 10
- Canton, NY 13617 · last May 9, first Sep 30
- De Peyster, NY 13633 · last May 14, first Sep 26
- Heuvelton, NY 13654 · last Apr 29, first Oct 10
- Russell, NY 13684 · last May 9, first Sep 30
Frequently asked questions
- When is the last frost in De Kalb Junction, NY?
- For ZIP code 13630, the average last spring frost (32°F) is May 9, based on NOAA 1991-2020 climate normals for the Canton 4 Se, NY weather station. There is a 1-in-10 chance of a frost after May 25.
- When is the first frost in De Kalb Junction, NY?
- The average first fall frost (32°F) is September 30. There is a 1-in-10 chance of frost by September 16, so tender plants are at risk from that point on.
- How long is the growing season in 13630?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 142 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.