Last spring frost
May 10
Frost Dates for Rogers City, MI
First fall frost
Oct 14
Growing season
154 days
Hardiness zone
6a
In an average year around Rogers City, MI, the last spring frost (32°F) is about May 10 and the first fall frost is about Oct 14, giving roughly a 154-day growing season. To be safe most years, wait until Apr 28 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Jun 5 | May 24 | May 10 |
| Freeze (32°F) | May 24 | May 10 | Apr 28 |
| Hard (28°F) | May 15 | Apr 29 | Apr 15 |
| Severe (24°F) | May 1 | Apr 17 | Apr 2 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 5 | Jun 1 | May 30 | May 27 | May 24 | May 21 | May 18 | May 15 | May 10 |
| 32°F | May 24 | May 21 | May 16 | May 14 | May 10 | May 8 | May 5 | May 1 | Apr 28 |
| 28°F | May 15 | May 10 | May 5 | May 1 | Apr 29 | Apr 27 | Apr 24 | Apr 20 | Apr 15 |
| 24°F | May 1 | Apr 26 | Apr 23 | Apr 20 | Apr 17 | Apr 14 | Apr 10 | Apr 7 | Apr 2 |
| 20°F | Apr 20 | Apr 15 | Apr 10 | Apr 8 | Apr 5 | Apr 3 | Apr 1 | Mar 29 | Mar 24 |
| 16°F | Apr 11 | Apr 6 | Apr 4 | Apr 2 | Mar 31 | Mar 28 | Mar 24 | Mar 20 | Mar 15 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Sep 17 | Oct 1 | Oct 15 |
| Freeze (32°F) | Sep 30 | Oct 14 | Oct 31 |
| Hard (28°F) | Oct 11 | Oct 28 | Nov 12 |
| Severe (24°F) | Oct 27 | Nov 11 | Nov 25 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 17 | Sep 22 | Sep 26 | Sep 29 | Oct 1 | Oct 3 | Oct 6 | Oct 10 | Oct 15 |
| 32°F | Sep 30 | Oct 3 | Oct 6 | Oct 10 | Oct 14 | Oct 17 | Oct 20 | Oct 24 | Oct 31 |
| 28°F | Oct 11 | Oct 17 | Oct 21 | Oct 25 | Oct 28 | Oct 31 | Nov 3 | Nov 7 | Nov 12 |
| 24°F | Oct 27 | Nov 1 | Nov 4 | Nov 8 | Nov 11 | Nov 14 | Nov 17 | Nov 21 | Nov 25 |
| 20°F | Nov 8 | Nov 12 | Nov 16 | Nov 19 | Nov 22 | Nov 25 | Nov 29 | Dec 2 | Dec 7 |
| 16°F | Nov 15 | Nov 22 | Nov 27 | Nov 30 | Dec 2 | Dec 5 | Dec 10 | Dec 15 | Dec 20 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Rogers City, Mi, about 2.1 miles away@if(!empty($station['elevation_ft'])), at 615 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Rogers City, MI?
On average, the last spring frost (32°F) around Rogers City, MI is about May 10. In cooler years it can run later, so for a safer bet many gardeners wait until Apr 28.
When is the first frost in the fall?
The first fall frost around Rogers City, MI typically arrives about Oct 14. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around May 10 on average, or Apr 28 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 154 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 49779 Planting calendar → Michigan frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026