Last spring frost
May 26
Frost Dates for Naubinway, MI
First fall frost
Sep 30
Growing season
127 days
Hardiness zone
5a
In an average year around Naubinway, MI, the last spring frost (32°F) is about May 26 and the first fall frost is about Sep 30, giving roughly a 127-day growing season. To be safe most years, wait until May 12 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 28 | Jun 7 | May 24 |
| Freeze (32°F) | Jun 10 | May 26 | May 12 |
| Hard (28°F) | May 26 | May 11 | Apr 28 |
| Severe (24°F) | May 10 | Apr 28 | Apr 15 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 28 | Jun 19 | Jun 14 | Jun 10 | Jun 7 | Jun 4 | Jun 1 | May 29 | May 24 |
| 32°F | Jun 10 | Jun 4 | May 31 | May 28 | May 26 | May 23 | May 21 | May 17 | May 12 |
| 28°F | May 26 | May 20 | May 17 | May 14 | May 11 | May 8 | May 5 | May 1 | Apr 28 |
| 24°F | May 10 | May 5 | May 2 | Apr 30 | Apr 28 | Apr 25 | Apr 23 | Apr 20 | Apr 15 |
| 20°F | Apr 29 | Apr 24 | Apr 21 | Apr 18 | Apr 16 | Apr 14 | Apr 11 | Apr 9 | Apr 5 |
| 16°F | Apr 19 | Apr 15 | Apr 12 | Apr 9 | Apr 7 | Apr 4 | Apr 2 | Apr 1 | Mar 28 |
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) | Aug 28 | Sep 15 | Oct 2 |
| Freeze (32°F) | Sep 13 | Sep 30 | Oct 13 |
| Hard (28°F) | Sep 26 | Oct 12 | Oct 30 |
| Severe (24°F) | Oct 9 | Oct 28 | Nov 12 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Aug 28 | Sep 2 | Sep 7 | Sep 11 | Sep 15 | Sep 19 | Sep 23 | Sep 28 | Oct 2 |
| 32°F | Sep 13 | Sep 20 | Sep 24 | Sep 27 | Sep 30 | Oct 3 | Oct 5 | Oct 9 | Oct 13 |
| 28°F | Sep 26 | Oct 1 | Oct 5 | Oct 8 | Oct 12 | Oct 15 | Oct 18 | Oct 23 | Oct 30 |
| 24°F | Oct 9 | Oct 15 | Oct 19 | Oct 23 | Oct 28 | Oct 31 | Nov 2 | Nov 7 | Nov 12 |
| 20°F | Oct 24 | Oct 30 | Nov 2 | Nov 5 | Nov 8 | Nov 12 | Nov 15 | Nov 19 | Nov 23 |
| 16°F | Nov 5 | Nov 11 | Nov 15 | Nov 18 | Nov 20 | Nov 23 | Nov 26 | Nov 30 | Dec 5 |
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: Engadine Mdot, Mi, about 5.9 miles away@if(!empty($station['elevation_ft'])), at 685 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 Naubinway, MI?
On average, the last spring frost (32°F) around Naubinway, MI is about May 26. In cooler years it can run later, so for a safer bet many gardeners wait until May 12.
When is the first frost in the fall?
The first fall frost around Naubinway, MI typically arrives about Sep 30. 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 26 on average, or May 12 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 127 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 49820 Planting calendar → Michigan frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026