Frost dates for 03588Milan, NH
The average last spring frost in Milan is May 30 and the average first fall frost is September 19, giving a typical growing season of about 112 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 30
- Average first fall frost
- Sep 19
- Growing season
- 112 days
Safer after Jun 11 (1-in-10 risk)
Possible by Sep 5 (1-in-10 risk)
Last frost typically in 210 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 28 · Jun 11 · Jun 30 | Aug 25 · Sep 6 · Sep 21 | 87 days | 100% |
| Frost / freeze (32°F) | May 15 · May 30 · Jun 11 | Sep 5 · Sep 19 · Oct 3 | 112 days | 100% |
| Hard freeze (28°F) | May 1 · May 17 · Jun 1 | Sep 17 · Sep 30 · Oct 15 | 136 days | 100% |
Planting calendar for Milan
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 29 – Jul 5 |
| Tomatoes | Transplant outdoors | Jun 15 – May 30 |
| Peppers | Start seeds indoors | Apr 29 – May 30 |
| Peppers | Transplant outdoors | Jun 29 – Jul 30 |
| Eggplant | Start seeds indoors | May 16 – Jun 14 |
| Eggplant | Transplant outdoors | Jun 29 – Jul 30 |
| Cucumbers | Sow outdoors | Jun 29 – Jun 9 |
| Summer squash | Sow outdoors | Jun 15 – Jul 30 |
| Winter squash & pumpkins | Sow outdoors | Jun 29 – Jul 30 |
| Snap beans | Sow outdoors | Jun 15 – Jul 2 |
| Sweet corn | Sow outdoors | Jun 15 – May 30 |
| Watermelon & cantaloupe | Sow outdoors | Jun 29 – Jul 30 |
| Okra | Sow outdoors | Jun 22 – Jul 15 |
| Peas | Sow outdoors (spring) | Apr 29 – Jun 14 |
| Potatoes | Plant outdoors (spring) | Apr 29 – Jun 29 |
| Onions | Start seeds indoors (spring) | Mar 18 – Apr 14 |
| Onions | Transplant outdoors (spring) | May 16 – Jun 14 |
| Broccoli | Start seeds indoors (spring) | Apr 11 – May 15 |
| Broccoli | Transplant outdoors (spring) | May 16 – Jun 14 |
| Broccoli | Start seeds indoors (fall) | May 20 – May 30 |
| Broccoli | Transplant outdoors (fall) | Jun 19 – Jun 30 |
| Cabbage | Start seeds indoors (spring) | Apr 1 – Apr 29 |
| Cabbage | Transplant outdoors (spring) | Apr 29 – May 30 |
| Cabbage | Start seeds indoors (fall) | May 10 – Jun 9 |
| Cabbage | Transplant outdoors (fall) | Jun 9 – Jul 10 |
| Leaf lettuce | Sow outdoors (spring) | Apr 29 – Jul 15 |
| Leaf lettuce | Sow outdoors (fall) | Jun 9 – Jul 26 |
| Spinach | Sow outdoors (spring) | Apr 22 – Jun 5 |
| Spinach | Sow outdoors (fall) | Jun 26 – Jul 31 |
| Radishes | Sow outdoors (spring) | Apr 29 – Jun 19 |
| Radishes | Sow outdoors (fall) | Jun 9 – Aug 10 |
| Kale | Sow outdoors (spring) | May 16 – Jun 5 |
| Kale | Sow outdoors (fall) | Jun 2 – Jul 10 |
| Carrots | Sow outdoors (spring) | May 30 – Jul 15 |
| Carrots | Sow outdoors (fall) | May 10 – Jun 25 |
| Garlic | Plant outdoors (fall) | Sep 9 – Oct 10 |
Where these dates come from
ZIP code 03588 is matched to the NOAA station Berlin Muni Ap, NH, 1.2 km away, at 1,158 ft elevation (39 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Berlin Muni Ap, NH (used) | 1,158 ft | May 30 | Sep 19 |
| Berlin, NH | 920 ft | May 14 | Sep 30 |
| York Pond, NH | 1,519 ft | May 23 | Sep 22 |
| Gorham Ap, NH | 800 ft | May 14 | Sep 26 |
Frost dates near Milan
- Berlin, NH 03570 · last May 14, first Sep 30
- Newry, ME 04261 · last May 19, first Oct 1
- Mount Washington, NH 03589 · last May 23, first Sep 22
- West Stewartstown, NH 03597 · last May 23, first Sep 22
- Gorham, NH 03581 · last May 23, first Sep 22
- Errol, NH 03579 · last May 19, first Oct 1
- Randolph, NH 03593 · last May 23, first Sep 22
- Groveton, NH 03582 · last May 18, first Sep 30
Frequently asked questions
- When is the last frost in Milan, NH?
- For ZIP code 03588, the average last spring frost (32°F) is May 30, based on NOAA 1991-2020 climate normals for the Berlin Muni Ap, NH weather station. There is a 1-in-10 chance of a frost after June 11.
- When is the first frost in Milan, NH?
- The average first fall frost (32°F) is September 19. There is a 1-in-10 chance of frost by September 5, so tender plants are at risk from that point on.
- How long is the growing season in 03588?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 112 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.