Frost dates for 03273South Sutton, NH
The average last spring frost in South Sutton is May 15 and the average first fall frost is September 27, giving a typical growing season of about 135 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 15
- Average first fall frost
- Sep 27
- Growing season
- 135 days
Safer after May 29 (1-in-10 risk)
Possible by Sep 15 (1-in-10 risk)
Last frost typically in 193 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 14 · May 29 · Jun 11 | Sep 6 · Sep 17 · Oct 1 | 111 days | 100% |
| Frost / freeze (32°F) | Apr 30 · May 15 · May 29 | Sep 15 · Sep 27 · Oct 9 | 135 days | 100% |
| Hard freeze (28°F) | Apr 19 · May 1 · May 17 | Sep 25 · Oct 8 · Oct 27 | 158 days | 100% |
Planting calendar for South Sutton
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 14 – Jun 20 |
| Tomatoes | Transplant outdoors | May 31 – Jun 7 |
| Peppers | Start seeds indoors | Apr 14 – May 15 |
| Peppers | Transplant outdoors | Jun 14 – Jul 15 |
| Eggplant | Start seeds indoors | May 1 – May 30 |
| Eggplant | Transplant outdoors | Jun 14 – Jul 15 |
| Cucumbers | Sow outdoors | Jun 14 – Jun 17 |
| Summer squash | Sow outdoors | May 31 – Jul 15 |
| Winter squash & pumpkins | Sow outdoors | Jun 14 – Jul 15 |
| Snap beans | Sow outdoors | May 31 – Jul 10 |
| Sweet corn | Sow outdoors | May 31 – Jun 7 |
| Watermelon & cantaloupe | Sow outdoors | Jun 14 – Jul 15 |
| Okra | Sow outdoors | Jun 7 – Jun 30 |
| Peas | Sow outdoors (spring) | Apr 14 – May 30 |
| Potatoes | Plant outdoors (spring) | Apr 14 – Jun 14 |
| Onions | Start seeds indoors (spring) | Mar 3 – Mar 30 |
| Onions | Transplant outdoors (spring) | May 1 – May 30 |
| Broccoli | Start seeds indoors (spring) | Mar 27 – Apr 30 |
| Broccoli | Transplant outdoors (spring) | May 1 – May 30 |
| Broccoli | Start seeds indoors (fall) | May 28 – Jun 7 |
| Broccoli | Transplant outdoors (fall) | Jun 27 – Jul 8 |
| Cabbage | Start seeds indoors (spring) | Mar 17 – Apr 14 |
| Cabbage | Transplant outdoors (spring) | Apr 14 – May 15 |
| Cabbage | Start seeds indoors (fall) | May 18 – Jun 17 |
| Cabbage | Transplant outdoors (fall) | Jun 17 – Jul 18 |
| Leaf lettuce | Sow outdoors (spring) | Apr 14 – Jun 30 |
| Leaf lettuce | Sow outdoors (fall) | Jun 17 – Aug 3 |
| Spinach | Sow outdoors (spring) | Apr 7 – May 21 |
| Spinach | Sow outdoors (fall) | Jul 4 – Aug 8 |
| Radishes | Sow outdoors (spring) | Apr 14 – Jun 4 |
| Radishes | Sow outdoors (fall) | Jun 17 – Aug 18 |
| Kale | Sow outdoors (spring) | May 1 – May 21 |
| Kale | Sow outdoors (fall) | Jun 10 – Jul 18 |
| Carrots | Sow outdoors (spring) | May 15 – Jun 30 |
| Carrots | Sow outdoors (fall) | May 18 – Jul 3 |
| Garlic | Plant outdoors (fall) | Sep 17 – Oct 18 |
Where these dates come from
ZIP code 03273 is matched to the NOAA station Bradford 2, NH, 7.8 km away, at 815 ft elevation (74 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Bradford 2, NH (used) | 815 ft | May 15 | Sep 27 |
| Mt Sunapee, NH | 1,275 ft | May 2 | Oct 9 |
| Salisbury, NH | 550 ft | May 14 | Sep 29 |
| Hopkinton Lake, NH | 430 ft | May 6 | Oct 1 |
Frost dates near South Sutton
- South Newbury, NH 03272 · last May 14, first Oct 1
- Bradford, NH 03221 · last May 15, first Sep 27
- North Sutton, NH 03260 · last May 2, first Oct 9
- Newbury, NH 03255 · last May 2, first Oct 9
- Warner, NH 03278 · last May 14, first Sep 29
- Elkins, NH 03233 · last May 14, first Oct 1
- New London, NH 03257 · last May 2, first Oct 9
- Goshen, NH 03752 · last May 2, first Oct 9
Frequently asked questions
- When is the last frost in South Sutton, NH?
- For ZIP code 03273, the average last spring frost (32°F) is May 15, based on NOAA 1991-2020 climate normals for the Bradford 2, NH weather station. There is a 1-in-10 chance of a frost after May 29.
- When is the first frost in South Sutton, NH?
- The average first fall frost (32°F) is September 27. There is a 1-in-10 chance of frost by September 15, so tender plants are at risk from that point on.
- How long is the growing season in 03273?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 135 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.