Frost dates for 05849Lyndon, VT
The average last spring frost in Lyndon is June 1 and the average first fall frost is September 13, giving a typical growing season of about 103 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 1
- Average first fall frost
- Sep 13
- Growing season
- 103 days
Safer after Jun 15 (1-in-10 risk)
Possible by Aug 30 (1-in-10 risk)
Last frost typically in 212 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 30 · Jun 12 · Jul 5 | Aug 13 · Sep 1 · Sep 14 | 78 days | 100% |
| Frost / freeze (32°F) | May 19 · Jun 1 · Jun 15 | Aug 30 · Sep 13 · Sep 28 | 103 days | 100% |
| Hard freeze (28°F) | May 5 · May 21 · Jun 4 | Sep 12 · Sep 27 · Oct 10 | 127 days | 100% |
Planting calendar for Lyndon
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 | May 1 – Jul 7 |
| Tomatoes | Transplant outdoors | Jun 17 – May 24 |
| Peppers | Start seeds indoors | May 1 – Jun 1 |
| Peppers | Transplant outdoors | Jul 1 – Aug 1 |
| Eggplant | Start seeds indoors | May 18 – Jun 16 |
| Eggplant | Transplant outdoors | Jul 1 – Aug 1 |
| Cucumbers | Sow outdoors | Jul 1 – Jun 3 |
| Summer squash | Sow outdoors | Jun 17 – Aug 1 |
| Winter squash & pumpkins | Sow outdoors | Jul 1 – Aug 1 |
| Snap beans | Sow outdoors | Jun 17 – Jun 26 |
| Sweet corn | Sow outdoors | Jun 17 – May 24 |
| Watermelon & cantaloupe | Sow outdoors | Jul 1 – Aug 1 |
| Okra | Sow outdoors | Jun 24 – Jul 17 |
| Peas | Sow outdoors (spring) | May 1 – Jun 16 |
| Potatoes | Plant outdoors (spring) | May 1 – Jul 1 |
| Onions | Start seeds indoors (spring) | Mar 20 – Apr 16 |
| Onions | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (spring) | Apr 13 – May 17 |
| Broccoli | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (fall) | May 14 – May 24 |
| Broccoli | Transplant outdoors (fall) | Jun 13 – Jun 24 |
| Cabbage | Start seeds indoors (spring) | Apr 3 – May 1 |
| Cabbage | Transplant outdoors (spring) | May 1 – Jun 1 |
| Cabbage | Start seeds indoors (fall) | May 4 – Jun 3 |
| Cabbage | Transplant outdoors (fall) | Jun 3 – Jul 4 |
| Leaf lettuce | Sow outdoors (spring) | May 1 – Jul 17 |
| Leaf lettuce | Sow outdoors (fall) | Jun 3 – Jul 20 |
| Spinach | Sow outdoors (spring) | Apr 24 – Jun 7 |
| Spinach | Sow outdoors (fall) | Jun 20 – Jul 25 |
| Radishes | Sow outdoors (spring) | May 1 – Jun 21 |
| Radishes | Sow outdoors (fall) | Jun 3 – Aug 4 |
| Kale | Sow outdoors (spring) | May 18 – Jun 7 |
| Kale | Sow outdoors (fall) | May 27 – Jul 4 |
| Carrots | Sow outdoors (spring) | Jun 1 – Jul 17 |
| Carrots | Sow outdoors (fall) | May 4 – Jun 19 |
| Garlic | Plant outdoors (fall) | Sep 3 – Oct 4 |
Where these dates come from
ZIP code 05849 is matched to the NOAA station Sutton 2Ne, VT, 19.5 km away, at 1,000 ft elevation (220 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Sutton 2Ne, VT (used) | 1,000 ft | Jun 1 | Sep 13 |
| Saint Johnsbury, VT | 700 ft | May 10 | Oct 3 |
| Saint Johnsbury, VT | 700 ft | May 13 | Oct 3 |
| Sutton, VT | 1,500 ft | May 9 | Oct 1 |
Frost dates near Lyndon
- East Saint Johnsbury, VT 05838 · last May 13, first Oct 3
- Saint Johnsbury Center, VT 05863 · last May 10, first Oct 3
- Lyndon Center, VT 05850 · last May 13, first Oct 3
- Concord, VT 05824 · last May 27, first Sep 19
- Saint Johnsbury, VT 05819 · last May 10, first Oct 3
- Lyndonville, VT 05851 · last Jun 1, first Sep 13
- East Burke, VT 05832 · last Jun 1, first Sep 13
- Lower Waterford, VT 05848 · last May 24, first Sep 18
Frequently asked questions
- When is the last frost in Lyndon, VT?
- For ZIP code 05849, the average last spring frost (32°F) is June 1, based on NOAA 1991-2020 climate normals for the Sutton 2Ne, VT weather station. There is a 1-in-10 chance of a frost after June 15.
- When is the first frost in Lyndon, VT?
- The average first fall frost (32°F) is September 13. There is a 1-in-10 chance of frost by August 30, so tender plants are at risk from that point on.
- How long is the growing season in 05849?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 103 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.