Wetmore, MI frost dates
Last spring frostMay 16median date
First fall frostOct 14median date
Growing season151 daysfrost-free
Hardiness zone4bZone 4b
How Wetmore compares
- In 8 years out of 10, the last spring frost in Wetmore falls between May 1 and June 2, a 32-day window. The first fall frost falls between September 30 and October 30.
- The median last frost is 11 days later than the Michigan median of May 5.
- Its 151-day growing season is longer than 34% of the 878 Michigan places with a regular frost season (state median 162 days).
- The last frost is 8 days later than the zone 4b median of May 8. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 4b chart.
- The weather station records an average of 169 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 1 |
| 50% (median) | May 16 |
| 10% (safe for tender plants) | June 2 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 30 |
| 50% (median) | October 14 |
| 90% (late) | October 30 |
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 Wetmore, MI
Wetmore, MI frost dates — last frost May 16, first frost Oct 14, zone 4b. whenisthelastfrost.com
Crop
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Start indoors: Feb 21 to Mar 7Transplant outside: Apr 18 to May 2
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 21 to Apr 4Transplant outside: May 23 to Jun 6
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Sow outdoors: Apr 18 to May 23Plant for fall: Aug 19 to Sep 16
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 18 to May 2Sow outdoors: Apr 18 to May 2Plant for fall: Aug 5 to Aug 26
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jul 8 to Jul 29
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 6 to Jun 20Sow outdoors: Jun 6 to Jun 20
Start indoors: Apr 4 to Apr 18Transplant outside: May 23 to Jun 6
Sow outdoors: Apr 4 to Apr 25Plant for fall: Jul 22 to Aug 12
Sow outdoors: Apr 4 to Apr 25Plant for fall: Aug 19 to Sep 9
Sow outdoors: Apr 11 to May 23Plant for fall: Sep 2 to Sep 23
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 6Sow outdoors: May 23 to Jun 6Plant for fall: Jul 29 to Aug 12
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6Plant for fall: Aug 5 to Aug 19
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 13
Sow outdoors: Apr 25 to May 23Plant for fall: Jul 22 to Aug 5
Sow outdoors: Apr 25 to May 23Plant for fall: Aug 5 to Aug 19
Sow outdoors: Apr 25 to May 16
Sow outdoors: May 2 to May 30Plant for fall: Aug 5 to Aug 19
Sow outdoors: May 2 to May 23Plant for fall: Aug 19 to Sep 9
Sow outdoors: May 23 to Jun 13Plant for fall: Jul 29 to Aug 12
Sow outdoors: May 23 to Jun 6
Transplant outside: May 30 to Jun 20
Plant for fall: Sep 30 to Nov 4
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Wetmore, MI
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 21 – Mar 7 | Apr 18 – May 2 | — | — |
| Peppers | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Eggplant | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Tomatoes | Mar 21 – Apr 4 | May 23 – Jun 6 | — | — |
| Lettuce | Mar 21 – Apr 4 | Apr 25 – May 9 | Apr 18 – May 23 | Aug 19 – Sep 16 |
| Kale | Mar 21 – Apr 4 | Apr 18 – May 2 | Apr 18 – May 2 | Aug 5 – Aug 26 |
| Broccoli | Mar 21 – Apr 4 | May 2 – May 16 | — | Jul 8 – Jul 29 |
| Cabbage | Mar 21 – Apr 4 | Apr 25 – May 9 | — | Jul 8 – Jul 29 |
| Cauliflower | Mar 21 – Apr 4 | May 2 – May 16 | — | Jul 8 – Jul 29 |
| Okra | Apr 4 – Apr 18 | Jun 6 – Jun 20 | Jun 6 – Jun 20 | — |
| Basil | Apr 4 – Apr 18 | May 23 – Jun 6 | — | — |
| Peas | — | — | Apr 4 – Apr 25 | Jul 22 – Aug 12 |
| Spinach | — | — | Apr 4 – Apr 25 | Aug 19 – Sep 9 |
| Radishes | — | — | Apr 11 – May 23 | Sep 2 – Sep 23 |
| Cucumbers | Apr 18 – Apr 25 | May 30 – Jun 6 | May 23 – Jun 6 | Jul 29 – Aug 12 |
| Zucchini & Summer Squash | Apr 18 – Apr 25 | — | May 23 – Jun 6 | Aug 5 – Aug 19 |
| Winter Squash & Pumpkins | Apr 18 – Apr 25 | — | May 23 – Jun 6 | — |
| Melons & Watermelon | Apr 18 – Apr 25 | May 30 – Jun 13 | — | — |
| Carrots | — | — | Apr 25 – May 23 | Jul 22 – Aug 5 |
| Beets | — | — | Apr 25 – May 23 | Aug 5 – Aug 19 |
| Potatoes | — | — | Apr 25 – May 16 | — |
| Swiss Chard | — | — | May 2 – May 30 | Aug 5 – Aug 19 |
| Cilantro | — | — | May 2 – May 23 | Aug 19 – Sep 9 |
| Green Beans | — | — | May 23 – Jun 13 | Jul 29 – Aug 12 |
| Sweet Corn | — | — | May 23 – Jun 6 | — |
| Sweet Potatoes | — | May 30 – Jun 20 | — | — |
| Garlic | — | — | — | Sep 30 – Nov 4 |
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 Munising, MI weather station, 7 km away (elevation 679 ft (207 m)).
Frost dates near Wetmore
- Munising May 16 · Oct 14
- Shingleton May 23 · Oct 10
- Chatham May 30 · Sep 27
- Au Train May 30 · Sep 27
- Eben Junction May 30 · Sep 27
- Trenary May 27 · Sep 28
- Rumely May 30 · Sep 27
- Deerton May 30 · Sep 27
- Skandia May 13 · Oct 2
- Manistique May 9 · Oct 10
Frequently asked questions
When is the last frost in Wetmore, MI?
The median last spring frost in Wetmore, MI is May 16. There is still about a 10% chance of frost after June 2, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Wetmore, MI?
The median first fall frost is October 14, with about a 10% chance of frost before September 30.
How long is the growing season in Wetmore, MI?
About 151 days between the median last spring frost and first fall frost.
What planting zone is Wetmore, MI?
Wetmore, MI is in USDA hardiness zone 4b.