Frost dates for 49826Rumely, MI
The average last spring frost in Rumely is May 30 and the average first fall frost is September 27, giving a typical growing season of about 119 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 30
- Average first fall frost
- Sep 27
- Growing season
- 119 days
Safer after Jun 21 (1-in-10 risk)
Possible by Sep 6 (1-in-10 risk)
Last frost typically in 216 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) | — | — | 87 days | 100% |
| Frost / freeze (32°F) | May 14 · May 30 · Jun 21 | Sep 6 · Sep 27 · Oct 11 | 119 days | 100% |
| Hard freeze (28°F) | Apr 29 · May 16 · Jun 3 | Sep 20 · Oct 9 · Oct 27 | 146 days | 100% |
Planting calendar for Rumely
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 – Jun 7 |
| 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 17 |
| Summer squash | Sow outdoors | Jun 15 – Jul 30 |
| Winter squash & pumpkins | Sow outdoors | Jun 29 – Jul 30 |
| Snap beans | Sow outdoors | Jun 15 – Jul 10 |
| Sweet corn | Sow outdoors | Jun 15 – Jun 7 |
| 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 28 – Jun 7 |
| Broccoli | Transplant outdoors (fall) | Jun 27 – Jul 8 |
| Cabbage | Start seeds indoors (spring) | Apr 1 – Apr 29 |
| Cabbage | Transplant outdoors (spring) | Apr 29 – May 30 |
| Cabbage | Start seeds indoors (fall) | May 18 – Jun 17 |
| Cabbage | Transplant outdoors (fall) | Jun 17 – Jul 18 |
| Leaf lettuce | Sow outdoors (spring) | Apr 29 – Jul 15 |
| Leaf lettuce | Sow outdoors (fall) | Jun 17 – Aug 3 |
| Spinach | Sow outdoors (spring) | Apr 22 – Jun 5 |
| Spinach | Sow outdoors (fall) | Jul 4 – Aug 8 |
| Radishes | Sow outdoors (spring) | Apr 29 – Jun 19 |
| Radishes | Sow outdoors (fall) | Jun 17 – Aug 18 |
| Kale | Sow outdoors (spring) | May 16 – Jun 5 |
| Kale | Sow outdoors (fall) | Jun 10 – Jul 18 |
| Carrots | Sow outdoors (spring) | May 30 – Jul 15 |
| Carrots | Sow outdoors (fall) | May 18 – Jul 3 |
| Garlic | Plant outdoors (fall) | Sep 17 – Oct 18 |
Where these dates come from
ZIP code 49826 is matched to the NOAA station Chatham Exp Farm 2, MI, 8.4 km away, at 870 ft elevation (183 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Chatham Exp Farm 2, MI (used) | 870 ft | May 30 | Sep 27 |
| Chatham 1 Se, MI | 875 ft | May 27 | Sep 28 |
| Ki Sawyer Wwtp, MI | 1,116 ft | May 13 | Oct 2 |
| Munising, MI | 680 ft | May 16 | Oct 14 |
Frost dates near Rumely
- Eben Junction, MI 49825 · last May 30, first Sep 27
- Chatham, MI 49816 · last May 30, first Sep 27
- Deerton, MI 49822 · last May 30, first Sep 27
- Au Train, MI 49806 · last May 16, first Oct 14
- Skandia, MI 49885 · last May 13, first Oct 2
- Trenary, MI 49891 · last May 27, first Sep 28
- Little Lake, MI 49833 · last May 13, first Oct 2
- Munising, MI 49862 · last May 16, first Oct 14
Frequently asked questions
- When is the last frost in Rumely, MI?
- For ZIP code 49826, the average last spring frost (32°F) is May 30, based on NOAA 1991-2020 climate normals for the Chatham Exp Farm 2, MI weather station. There is a 1-in-10 chance of a frost after June 21.
- When is the first frost in Rumely, MI?
- The average first fall frost (32°F) is September 27. There is a 1-in-10 chance of frost by September 6, so tender plants are at risk from that point on.
- How long is the growing season in 49826?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 119 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.