Frost dates for 49712Boyne City, MI
The average last spring frost in Boyne City is May 23 and the average first fall frost is October 3, giving a typical growing season of about 133 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 23
- Average first fall frost
- Oct 3
- Growing season
- 133 days
Safer after Jun 6 (1-in-10 risk)
Possible by Sep 16 (1-in-10 risk)
Last frost typically in 202 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 21 · Jun 2 · Jun 21 | Sep 1 · Sep 19 · Oct 5 | 110 days | 100% |
| Frost / freeze (32°F) | May 4 · May 23 · Jun 6 | Sep 16 · Oct 3 · Oct 19 | 133 days | 100% |
| Hard freeze (28°F) | Apr 24 · May 10 · May 27 | Sep 28 · Oct 16 · Nov 2 | 160 days | 100% |
Planting calendar for Boyne City
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 22 – Jun 28 |
| Tomatoes | Transplant outdoors | Jun 8 – Jun 13 |
| Peppers | Start seeds indoors | Apr 22 – May 23 |
| Peppers | Transplant outdoors | Jun 22 – Jul 23 |
| Eggplant | Start seeds indoors | May 9 – Jun 7 |
| Eggplant | Transplant outdoors | Jun 22 – Jul 23 |
| Cucumbers | Sow outdoors | Jun 22 – Jun 23 |
| Summer squash | Sow outdoors | Jun 8 – Jul 23 |
| Winter squash & pumpkins | Sow outdoors | Jun 22 – Jul 23 |
| Snap beans | Sow outdoors | Jun 8 – Jul 16 |
| Sweet corn | Sow outdoors | Jun 8 – Jun 13 |
| Watermelon & cantaloupe | Sow outdoors | Jun 22 – Jul 23 |
| Okra | Sow outdoors | Jun 15 – Jul 8 |
| Peas | Sow outdoors (spring) | Apr 22 – Jun 7 |
| Potatoes | Plant outdoors (spring) | Apr 22 – Jun 22 |
| Onions | Start seeds indoors (spring) | Mar 11 – Apr 7 |
| Onions | Transplant outdoors (spring) | May 9 – Jun 7 |
| Broccoli | Start seeds indoors (spring) | Apr 4 – May 8 |
| Broccoli | Transplant outdoors (spring) | May 9 – Jun 7 |
| Broccoli | Start seeds indoors (fall) | Jun 3 – Jun 13 |
| Broccoli | Transplant outdoors (fall) | Jul 3 – Jul 14 |
| Cabbage | Start seeds indoors (spring) | Mar 25 – Apr 22 |
| Cabbage | Transplant outdoors (spring) | Apr 22 – May 23 |
| Cabbage | Start seeds indoors (fall) | May 24 – Jun 23 |
| Cabbage | Transplant outdoors (fall) | Jun 23 – Jul 24 |
| Leaf lettuce | Sow outdoors (spring) | Apr 22 – Jul 8 |
| Leaf lettuce | Sow outdoors (fall) | Jun 23 – Aug 9 |
| Spinach | Sow outdoors (spring) | Apr 15 – May 29 |
| Spinach | Sow outdoors (fall) | Jul 10 – Aug 14 |
| Radishes | Sow outdoors (spring) | Apr 22 – Jun 12 |
| Radishes | Sow outdoors (fall) | Jun 23 – Aug 24 |
| Kale | Sow outdoors (spring) | May 9 – May 29 |
| Kale | Sow outdoors (fall) | Jun 16 – Jul 24 |
| Carrots | Sow outdoors (spring) | May 23 – Jul 8 |
| Carrots | Sow outdoors (fall) | May 24 – Jul 9 |
| Garlic | Plant outdoors (fall) | Sep 23 – Oct 24 |
Where these dates come from
ZIP code 49712 is matched to the NOAA station Boyne Falls, MI, 9.2 km away, at 728 ft elevation (85 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Boyne Falls, MI (used) | 728 ft | May 23 | Oct 3 |
| E Jordan 2Nw, MI | 646 ft | May 16 | Oct 6 |
| E Jordan, MI | 587 ft | May 23 | Oct 2 |
| Petoskey Ncmc, MI | 748 ft | May 16 | Oct 9 |
Frost dates near Boyne City
- Walloon Lake, MI 49796 · last May 23, first Oct 3
- Boyne Falls, MI 49713 · last May 23, first Oct 3
- East Jordan, MI 49727 · last May 23, first Oct 2
- Charlevoix, MI 49720 · last May 1, first Oct 28
- Bay Shore, MI 49711 · last May 6, first Oct 20
- Petoskey, MI 49770 · last May 6, first Oct 20
- Ellsworth, MI 49729 · last May 23, first Oct 2
- Elmira, MI 49730 · last May 25, first Sep 26
Frequently asked questions
- When is the last frost in Boyne City, MI?
- For ZIP code 49712, the average last spring frost (32°F) is May 23, based on NOAA 1991-2020 climate normals for the Boyne Falls, MI weather station. There is a 1-in-10 chance of a frost after June 6.
- When is the first frost in Boyne City, MI?
- The average first fall frost (32°F) is October 3. There is a 1-in-10 chance of frost by September 16, so tender plants are at risk from that point on.
- How long is the growing season in 49712?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 133 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.