Frost dates for 49721Cheboygan, MI
The average last spring frost in Cheboygan is May 11 and the average first fall frost is October 11, giving a typical growing season of about 152 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 11
- Average first fall frost
- Oct 11
- Growing season
- 152 days
Safer after May 25 (1-in-10 risk)
Possible by Sep 24 (1-in-10 risk)
Last frost typically in 190 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 10 · May 24 · Jun 7 | Sep 17 · Oct 1 · Oct 14 | 128 days | 100% |
| Frost / freeze (32°F) | Apr 29 · May 11 · May 25 | Sep 24 · Oct 11 · Oct 27 | 152 days | 100% |
| Hard freeze (28°F) | Apr 15 · Apr 30 · May 15 | Oct 3 · Oct 22 · Nov 8 | 175 days | 100% |
Planting calendar for Cheboygan
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 10 – Jun 16 |
| Tomatoes | Transplant outdoors | May 27 – Jun 21 |
| Peppers | Start seeds indoors | Apr 10 – May 11 |
| Peppers | Transplant outdoors | Jun 10 – Jul 11 |
| Eggplant | Start seeds indoors | Apr 27 – May 26 |
| Eggplant | Transplant outdoors | Jun 10 – Jul 11 |
| Cucumbers | Sow outdoors | Jun 10 – Jul 1 |
| Summer squash | Sow outdoors | May 27 – Jul 11 |
| Winter squash & pumpkins | Sow outdoors | Jun 10 – Jul 11 |
| Snap beans | Sow outdoors | May 27 – Jul 24 |
| Sweet corn | Sow outdoors | May 27 – Jun 21 |
| Watermelon & cantaloupe | Sow outdoors | Jun 10 – Jul 11 |
| Okra | Sow outdoors | Jun 3 – Jun 26 |
| Peas | Sow outdoors (spring) | Apr 10 – May 26 |
| Potatoes | Plant outdoors (spring) | Apr 10 – Jun 10 |
| Onions | Start seeds indoors (spring) | Feb 27 – Mar 26 |
| Onions | Transplant outdoors (spring) | Apr 27 – May 26 |
| Broccoli | Start seeds indoors (spring) | Mar 23 – Apr 26 |
| Broccoli | Transplant outdoors (spring) | Apr 27 – May 26 |
| Broccoli | Start seeds indoors (fall) | Jun 11 – Jun 21 |
| Broccoli | Transplant outdoors (fall) | Jul 11 – Jul 22 |
| Cabbage | Start seeds indoors (spring) | Mar 13 – Apr 10 |
| Cabbage | Transplant outdoors (spring) | Apr 10 – May 11 |
| Cabbage | Start seeds indoors (fall) | Jun 1 – Jul 1 |
| Cabbage | Transplant outdoors (fall) | Jul 1 – Aug 1 |
| Leaf lettuce | Sow outdoors (spring) | Apr 10 – Jun 26 |
| Leaf lettuce | Sow outdoors (fall) | Jul 1 – Aug 17 |
| Spinach | Sow outdoors (spring) | Apr 3 – May 17 |
| Spinach | Sow outdoors (fall) | Jul 18 – Aug 22 |
| Radishes | Sow outdoors (spring) | Apr 10 – May 31 |
| Radishes | Sow outdoors (fall) | Jul 1 – Sep 1 |
| Kale | Sow outdoors (spring) | Apr 27 – May 17 |
| Kale | Sow outdoors (fall) | Jun 24 – Aug 1 |
| Carrots | Sow outdoors (spring) | May 11 – Jun 26 |
| Carrots | Sow outdoors (fall) | Jun 1 – Jul 17 |
| Garlic | Plant outdoors (fall) | Oct 1 – Nov 1 |
Where these dates come from
ZIP code 49721 is matched to the NOAA station Cheboygan, MI, 5.1 km away, at 588 ft elevation (49 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Cheboygan, MI (used) | 588 ft | May 11 | Oct 11 |
| Pellston Ap #2, MI | 712 ft | May 21 | Sep 27 |
| Pellston Rgnl Ap, MI | 705 ft | May 31 | Sep 18 |
| Onaway 4N, MI | 745 ft | May 22 | Oct 2 |
Frost dates near Cheboygan
- Mullett Lake, MI 49761 · last May 11, first Oct 11
- Topinabee, MI 49791 · last May 31, first Sep 18
- Pointe Aux Pins, MI 49775 · last May 11, first Oct 11
- Indian River, MI 49749 · last May 31, first Sep 18
- Brutus, MI 49716 · last May 31, first Sep 18
- Levering, MI 49755 · last May 31, first Sep 18
- Burt Lake, MI 49717 · last May 31, first Sep 18
- Mackinaw City, MI 49701 · last May 7, first Oct 23
Frequently asked questions
- When is the last frost in Cheboygan, MI?
- For ZIP code 49721, the average last spring frost (32°F) is May 11, based on NOAA 1991-2020 climate normals for the Cheboygan, MI weather station. There is a 1-in-10 chance of a frost after May 25.
- When is the first frost in Cheboygan, MI?
- The average first fall frost (32°F) is October 11. There is a 1-in-10 chance of frost by September 24, so tender plants are at risk from that point on.
- How long is the growing season in 49721?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 152 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.