Frost dates for 04613Birch Harbor, ME
The average last spring frost in Birch Harbor is April 27 and the average first fall frost is October 22, giving a typical growing season of about 177 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 27
- Average first fall frost
- Oct 22
- Growing season
- 177 days
Safer after May 8 (1-in-10 risk)
Possible by Oct 6 (1-in-10 risk)
Last frost typically in 177 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) | Apr 27 · May 8 · May 23 | Sep 26 · Oct 8 · Oct 25 | 151 days | 100% |
| Frost / freeze (32°F) | Apr 15 · Apr 27 · May 8 | Oct 6 · Oct 22 · Nov 5 | 177 days | 100% |
| Hard freeze (28°F) | Apr 4 · Apr 15 · Apr 27 | Oct 18 · Nov 2 · Nov 16 | 201 days | 100% |
Planting calendar for Birch Harbor
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 | Mar 27 – Jun 2 |
| Tomatoes | Transplant outdoors | May 13 – Jul 2 |
| Peppers | Start seeds indoors | Mar 27 – Apr 27 |
| Peppers | Transplant outdoors | May 27 – Jun 27 |
| Eggplant | Start seeds indoors | Apr 13 – May 12 |
| Eggplant | Transplant outdoors | May 27 – Jun 27 |
| Cucumbers | Sow outdoors | May 27 – Jul 12 |
| Summer squash | Sow outdoors | May 13 – Jun 27 |
| Winter squash & pumpkins | Sow outdoors | May 27 – Jun 27 |
| Snap beans | Sow outdoors | May 13 – Aug 4 |
| Sweet corn | Sow outdoors | May 13 – Jul 2 |
| Watermelon & cantaloupe | Sow outdoors | May 27 – Jun 27 |
| Okra | Sow outdoors | May 20 – Jun 12 |
| Peas | Sow outdoors (spring) | Mar 27 – May 12 |
| Potatoes | Plant outdoors (spring) | Mar 27 – May 27 |
| Onions | Start seeds indoors (spring) | Feb 13 – Mar 12 |
| Onions | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (spring) | Mar 9 – Apr 12 |
| Broccoli | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (fall) | Jun 22 – Jul 2 |
| Broccoli | Transplant outdoors (fall) | Jul 22 – Aug 2 |
| Cabbage | Start seeds indoors (spring) | Feb 27 – Mar 27 |
| Cabbage | Transplant outdoors (spring) | Mar 27 – Apr 27 |
| Cabbage | Start seeds indoors (fall) | Jun 12 – Jul 12 |
| Cabbage | Transplant outdoors (fall) | Jul 12 – Aug 12 |
| Leaf lettuce | Sow outdoors (spring) | Mar 27 – Jun 12 |
| Leaf lettuce | Sow outdoors (fall) | Jul 12 – Aug 28 |
| Spinach | Sow outdoors (spring) | Mar 20 – May 3 |
| Spinach | Sow outdoors (fall) | Jul 29 – Sep 2 |
| Radishes | Sow outdoors (spring) | Mar 27 – May 17 |
| Radishes | Sow outdoors (fall) | Jul 12 – Sep 12 |
| Kale | Sow outdoors (spring) | Apr 13 – May 3 |
| Kale | Sow outdoors (fall) | Jul 5 – Aug 12 |
| Carrots | Sow outdoors (spring) | Apr 27 – Jun 12 |
| Carrots | Sow outdoors (fall) | Jun 12 – Jul 28 |
| Garlic | Plant outdoors (fall) | Oct 12 – Nov 12 |
Where these dates come from
ZIP code 04613 is matched to the NOAA station Acadia Np, ME, 18.1 km away, at 470 ft elevation (467 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Acadia Np, ME (used) | 470 ft | Apr 27 | Oct 22 |
| E Surry, ME | 105 ft | May 8 | Oct 9 |
| Jonesboro, ME | 194 ft | May 3 | Oct 9 |
| Wesley, ME | 410 ft | May 2 | Oct 15 |
Frost dates near Birch Harbor
- Prospect Harbor, ME 04669 · last Apr 27, first Oct 22
- Winter Harbor, ME 04693 · last Apr 27, first Oct 22
- Corea, ME 04624 · last Apr 27, first Oct 22
- Gouldsboro, ME 04607 · last Apr 27, first Oct 22
- Steuben, ME 04680 · last Apr 27, first Oct 22
- Sorrento, ME 04677 · last Apr 27, first Oct 22
- Bar Harbor, ME 04609 · last Apr 27, first Oct 22
- Hulls Cove, ME 04644 · last Apr 27, first Oct 22
Frequently asked questions
- When is the last frost in Birch Harbor, ME?
- For ZIP code 04613, the average last spring frost (32°F) is April 27, based on NOAA 1991-2020 climate normals for the Acadia Np, ME weather station. There is a 1-in-10 chance of a frost after May 8.
- When is the first frost in Birch Harbor, ME?
- The average first fall frost (32°F) is October 22. There is a 1-in-10 chance of frost by October 6, so tender plants are at risk from that point on.
- How long is the growing season in 04613?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 177 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.