Mc Millan, MI frost dates
Last spring frostMay 21median date
First fall frostOct 5median date
Growing season137 daysfrost-free
Hardiness zone5aZone 5a
How Mc Millan compares
- In 8 years out of 10, the last spring frost in Mc Millan falls between May 4 and June 4, a 31-day window. The first fall frost falls between September 20 and October 21.
- The median last frost is 16 days later than the Michigan median of May 5.
- Its 137-day growing season is longer than 18% of the 878 Michigan places with a regular frost season (state median 162 days).
- The last frost is 18 days later than the zone 5a median of May 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5a chart.
- The weather station records an average of 178 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 4 |
| 50% (median) | May 21 |
| 10% (safe for tender plants) | June 4 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 20 |
| 50% (median) | October 5 |
| 90% (late) | October 21 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Mc Millan, MI
Mc Millan, MI frost dates — last frost May 21, first frost Oct 5, zone 5a. whenisthelastfrost.com
Crop
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Start indoors: Feb 26 to Mar 12Transplant outside: Apr 23 to May 7
Start indoors: Mar 12 to Mar 26Transplant outside: Jun 4 to Jun 18
Start indoors: Mar 12 to Mar 26Transplant outside: Jun 4 to Jun 18
Start indoors: Mar 26 to Apr 9Transplant outside: May 28 to Jun 11
Start indoors: Mar 26 to Apr 9Transplant outside: Apr 30 to May 14Sow outdoors: Apr 23 to May 28Plant for fall: Aug 10 to Sep 7
Start indoors: Mar 26 to Apr 9Transplant outside: Apr 23 to May 7Sow outdoors: Apr 23 to May 7Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 26 to Apr 9Transplant outside: May 7 to May 21Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 26 to Apr 9Transplant outside: Apr 30 to May 14Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 26 to Apr 9Transplant outside: May 7 to May 21Plant for fall: Jun 29 to Jul 20
Start indoors: Apr 9 to Apr 23Transplant outside: Jun 11 to Jun 25Sow outdoors: Jun 11 to Jun 25
Start indoors: Apr 9 to Apr 23Transplant outside: May 28 to Jun 11
Sow outdoors: Apr 9 to Apr 30Plant for fall: Jul 13 to Aug 3
Sow outdoors: Apr 9 to Apr 30Plant for fall: Aug 10 to Aug 31
Sow outdoors: Apr 16 to May 28Plant for fall: Aug 24 to Sep 14
Start indoors: Apr 23 to Apr 30Transplant outside: Jun 4 to Jun 11Sow outdoors: May 28 to Jun 11Plant for fall: Jul 20 to Aug 3
Start indoors: Apr 23 to Apr 30Sow outdoors: May 28 to Jun 11Plant for fall: Jul 27 to Aug 10
Start indoors: Apr 23 to Apr 30Sow outdoors: May 28 to Jun 11
Start indoors: Apr 23 to Apr 30Transplant outside: Jun 4 to Jun 18
Sow outdoors: Apr 30 to May 28Plant for fall: Jul 13 to Jul 27
Sow outdoors: Apr 30 to May 28Plant for fall: Jul 27 to Aug 10
Sow outdoors: Apr 30 to May 21
Sow outdoors: May 7 to Jun 4Plant for fall: Jul 27 to Aug 10
Sow outdoors: May 7 to May 28Plant for fall: Aug 10 to Aug 31
Sow outdoors: May 28 to Jun 18Plant for fall: Jul 20 to Aug 3
Sow outdoors: May 28 to Jun 11
Transplant outside: Jun 4 to Jun 25
Plant for fall: Sep 21 to Oct 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Mc Millan, MI
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 26 – Mar 12 | Apr 23 – May 7 | — | — |
| Peppers | Mar 12 – Mar 26 | Jun 4 – Jun 18 | — | — |
| Eggplant | Mar 12 – Mar 26 | Jun 4 – Jun 18 | — | — |
| Tomatoes | Mar 26 – Apr 9 | May 28 – Jun 11 | — | — |
| Lettuce | Mar 26 – Apr 9 | Apr 30 – May 14 | Apr 23 – May 28 | Aug 10 – Sep 7 |
| Kale | Mar 26 – Apr 9 | Apr 23 – May 7 | Apr 23 – May 7 | Jul 27 – Aug 17 |
| Broccoli | Mar 26 – Apr 9 | May 7 – May 21 | — | Jun 29 – Jul 20 |
| Cabbage | Mar 26 – Apr 9 | Apr 30 – May 14 | — | Jun 29 – Jul 20 |
| Cauliflower | Mar 26 – Apr 9 | May 7 – May 21 | — | Jun 29 – Jul 20 |
| Okra | Apr 9 – Apr 23 | Jun 11 – Jun 25 | Jun 11 – Jun 25 | — |
| Basil | Apr 9 – Apr 23 | May 28 – Jun 11 | — | — |
| Peas | — | — | Apr 9 – Apr 30 | Jul 13 – Aug 3 |
| Spinach | — | — | Apr 9 – Apr 30 | Aug 10 – Aug 31 |
| Radishes | — | — | Apr 16 – May 28 | Aug 24 – Sep 14 |
| Cucumbers | Apr 23 – Apr 30 | Jun 4 – Jun 11 | May 28 – Jun 11 | Jul 20 – Aug 3 |
| Zucchini & Summer Squash | Apr 23 – Apr 30 | — | May 28 – Jun 11 | Jul 27 – Aug 10 |
| Winter Squash & Pumpkins | Apr 23 – Apr 30 | — | May 28 – Jun 11 | — |
| Melons & Watermelon | Apr 23 – Apr 30 | Jun 4 – Jun 18 | — | — |
| Carrots | — | — | Apr 30 – May 28 | Jul 13 – Jul 27 |
| Beets | — | — | Apr 30 – May 28 | Jul 27 – Aug 10 |
| Potatoes | — | — | Apr 30 – May 21 | — |
| Swiss Chard | — | — | May 7 – Jun 4 | Jul 27 – Aug 10 |
| Cilantro | — | — | May 7 – May 28 | Aug 10 – Aug 31 |
| Green Beans | — | — | May 28 – Jun 18 | Jul 20 – Aug 3 |
| Sweet Corn | — | — | May 28 – Jun 11 | — |
| Sweet Potatoes | — | Jun 4 – Jun 25 | — | — |
| Garlic | — | — | — | Sep 21 – Oct 26 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Newberry Correctional Facility, MI weather station, 18 km away (elevation 886 ft (270 m)).
Frost dates near Mc Millan
- Curtis May 26 · Sep 30
- Engadine May 26 · Sep 30
- Germfask May 26 · Sep 30
- Newberry May 21 · Oct 5
- Seney May 27 · Oct 10
- Gould City May 26 · Sep 30
- Naubinway May 26 · Sep 30
- Gulliver May 9 · Oct 10
- Hulbert frost any month
- Grand Marais May 27 · Oct 10
Frequently asked questions
When is the last frost in Mc Millan, MI?
The median last spring frost in Mc Millan, MI is May 21. There is still about a 10% chance of frost after June 4, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Mc Millan, MI?
The median first fall frost is October 5, with about a 10% chance of frost before September 20.
How long is the growing season in Mc Millan, MI?
About 137 days between the median last spring frost and first fall frost.
What planting zone is Mc Millan, MI?
Mc Millan, MI is in USDA hardiness zone 5a.