Frost dates for 03886Tamworth, NH
The average last spring frost in Tamworth is May 16 and the average first fall frost is September 26, giving a typical growing season of about 129 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 16
- Average first fall frost
- Sep 26
- Growing season
- 129 days
Safer after May 30 (1-in-10 risk)
Possible by Sep 10 (1-in-10 risk)
Last frost typically in 196 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 15 · May 29 · Jun 11 | Sep 1 · Sep 14 · Sep 28 | 106 days | 100% |
| Frost / freeze (32°F) | May 3 · May 16 · May 30 | Sep 10 · Sep 26 · Oct 7 | 129 days | 100% |
| Hard freeze (28°F) | Apr 24 · May 4 · May 19 | Sep 21 · Oct 4 · Oct 20 | 151 days | 100% |
Planting calendar for Tamworth
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 15 – Jun 21 |
| Tomatoes | Transplant outdoors | Jun 1 – Jun 6 |
| Peppers | Start seeds indoors | Apr 15 – May 16 |
| Peppers | Transplant outdoors | Jun 15 – Jul 16 |
| Eggplant | Start seeds indoors | May 2 – May 31 |
| Eggplant | Transplant outdoors | Jun 15 – Jul 16 |
| Cucumbers | Sow outdoors | Jun 15 – Jun 16 |
| Summer squash | Sow outdoors | Jun 1 – Jul 16 |
| Winter squash & pumpkins | Sow outdoors | Jun 15 – Jul 16 |
| Snap beans | Sow outdoors | Jun 1 – Jul 9 |
| Sweet corn | Sow outdoors | Jun 1 – Jun 6 |
| Watermelon & cantaloupe | Sow outdoors | Jun 15 – Jul 16 |
| Okra | Sow outdoors | Jun 8 – Jul 1 |
| Peas | Sow outdoors (spring) | Apr 15 – May 31 |
| Potatoes | Plant outdoors (spring) | Apr 15 – Jun 15 |
| Onions | Start seeds indoors (spring) | Mar 4 – Mar 31 |
| Onions | Transplant outdoors (spring) | May 2 – May 31 |
| Broccoli | Start seeds indoors (spring) | Mar 28 – May 1 |
| Broccoli | Transplant outdoors (spring) | May 2 – May 31 |
| Broccoli | Start seeds indoors (fall) | May 27 – Jun 6 |
| Broccoli | Transplant outdoors (fall) | Jun 26 – Jul 7 |
| Cabbage | Start seeds indoors (spring) | Mar 18 – Apr 15 |
| Cabbage | Transplant outdoors (spring) | Apr 15 – May 16 |
| Cabbage | Start seeds indoors (fall) | May 17 – Jun 16 |
| Cabbage | Transplant outdoors (fall) | Jun 16 – Jul 17 |
| Leaf lettuce | Sow outdoors (spring) | Apr 15 – Jul 1 |
| Leaf lettuce | Sow outdoors (fall) | Jun 16 – Aug 2 |
| Spinach | Sow outdoors (spring) | Apr 8 – May 22 |
| Spinach | Sow outdoors (fall) | Jul 3 – Aug 7 |
| Radishes | Sow outdoors (spring) | Apr 15 – Jun 5 |
| Radishes | Sow outdoors (fall) | Jun 16 – Aug 17 |
| Kale | Sow outdoors (spring) | May 2 – May 22 |
| Kale | Sow outdoors (fall) | Jun 9 – Jul 17 |
| Carrots | Sow outdoors (spring) | May 16 – Jul 1 |
| Carrots | Sow outdoors (fall) | May 17 – Jul 2 |
| Garlic | Plant outdoors (fall) | Sep 16 – Oct 17 |
Where these dates come from
ZIP code 03886 is matched to the NOAA station Tamworth 4, NH, 0.3 km away, at 541 ft elevation (32 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Tamworth 4, NH (used) | 541 ft | May 16 | Sep 26 |
| E Sandwich, NH | 692 ft | May 6 | Oct 6 |
| Waterville Valley Nepp, NH | 1,429 ft | May 15 | Sep 28 |
| N Conway, NH | 522 ft | May 7 | Oct 5 |
Frost dates near Tamworth
- Chocorua, NH 03817 · last May 16, first Sep 26
- Silver Lake, NH 03875 · last May 16, first Sep 26
- South Tamworth, NH 03883 · last May 16, first Sep 26
- West Ossipee, NH 03890 · last May 16, first Sep 26
- Wonalancet, NH 03897 · last May 16, first Sep 26
- North Sandwich, NH 03259 · last May 16, first Sep 26
- Madison, NH 03849 · last May 16, first Sep 26
- Center Ossipee, NH 03814 · last May 16, first Sep 26
Frequently asked questions
- When is the last frost in Tamworth, NH?
- For ZIP code 03886, the average last spring frost (32°F) is May 16, based on NOAA 1991-2020 climate normals for the Tamworth 4, NH weather station. There is a 1-in-10 chance of a frost after May 30.
- When is the first frost in Tamworth, NH?
- The average first fall frost (32°F) is September 26. There is a 1-in-10 chance of frost by September 10, so tender plants are at risk from that point on.
- How long is the growing season in 03886?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 129 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.