Last spring frost
May 23
Frost Dates for East Jordan, MI
First fall frost
Oct 2
Growing season
131 days
Hardiness zone
5b
In an average year around East Jordan, MI, the last spring frost (32°F) is about May 23 and the first fall frost is about Oct 2, giving roughly a 131-day growing season. To be safe most years, wait until May 5 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 25 | Jun 4 | May 21 |
| Freeze (32°F) | Jun 6 | May 23 | May 5 |
| Hard (28°F) | May 23 | May 8 | Apr 23 |
| Severe (24°F) | May 11 | Apr 25 | Apr 10 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 25 | Jun 16 | Jun 11 | Jun 8 | Jun 4 | Jun 1 | May 29 | May 26 | May 21 |
| 32°F | Jun 6 | May 31 | May 28 | May 26 | May 23 | May 20 | May 16 | May 12 | May 5 |
| 28°F | May 23 | May 19 | May 15 | May 12 | May 8 | May 4 | May 1 | Apr 28 | Apr 23 |
| 24°F | May 11 | May 5 | May 1 | Apr 28 | Apr 25 | Apr 22 | Apr 19 | Apr 15 | Apr 10 |
| 20°F | Apr 26 | Apr 22 | Apr 18 | Apr 15 | Apr 12 | Apr 9 | Apr 6 | Apr 4 | Mar 30 |
| 16°F | Apr 17 | Apr 12 | Apr 9 | Apr 6 | Apr 3 | Apr 1 | Mar 30 | Mar 26 | Mar 20 |
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 29 | Sep 18 | Oct 3 |
| Freeze (32°F) | Sep 17 | Oct 2 | Oct 17 |
| Hard (28°F) | Sep 30 | Oct 16 | Nov 3 |
| Severe (24°F) | Oct 13 | Nov 2 | Nov 15 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Aug 29 | Sep 4 | Sep 10 | Sep 15 | Sep 18 | Sep 21 | Sep 24 | Sep 29 | Oct 3 |
| 32°F | Sep 17 | Sep 21 | Sep 25 | Sep 29 | Oct 2 | Oct 5 | Oct 8 | Oct 11 | Oct 17 |
| 28°F | Sep 30 | Oct 5 | Oct 10 | Oct 13 | Oct 16 | Oct 21 | Oct 25 | Oct 30 | Nov 3 |
| 24°F | Oct 13 | Oct 21 | Oct 26 | Oct 30 | Nov 2 | Nov 4 | Nov 7 | Nov 11 | Nov 15 |
| 20°F | Oct 29 | Nov 3 | Nov 7 | Nov 10 | Nov 14 | Nov 17 | Nov 21 | Nov 25 | Dec 1 |
| 16°F | Nov 8 | Nov 14 | Nov 19 | Nov 23 | Nov 28 | Dec 1 | Dec 5 | Dec 10 | Dec 16 |
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: E Jordan, Mi, about 1.5 miles away@if(!empty($station['elevation_ft'])), at 587 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 East Jordan, MI?
On average, the last spring frost (32°F) around East Jordan, MI is about May 23. In cooler years it can run later, so for a safer bet many gardeners wait until May 5.
When is the first frost in the fall?
The first fall frost around East Jordan, MI typically arrives about Oct 2. 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 23 on average, or May 5 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 131 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 49727 Planting calendar → Michigan frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026