Rumely, MI frost dates
Last spring frostMay 30median date
First fall frostSep 27median date
Growing season120 daysfrost-free
Hardiness zone5aZone 5a
How Rumely compares
- In 8 years out of 10, the last spring frost in Rumely falls between May 14 and June 21, a 38-day window. The first fall frost falls between September 6 and October 11.
- The median last frost is 25 days later than the Michigan median of May 5.
- Its 120-day growing season is longer than 3% of the 878 Michigan places with a regular frost season (state median 162 days).
- The last frost is 27 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 193 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 14 |
| 50% (median) | May 30 |
| 10% (safe for tender plants) | June 21 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 6 |
| 50% (median) | September 27 |
| 90% (late) | October 11 |
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 Rumely, MI
Rumely, MI frost dates — last frost May 30, first frost Sep 27, zone 5a. whenisthelastfrost.com
Crop
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Start indoors: Mar 7 to Mar 21Transplant outside: May 2 to May 16
Start indoors: Mar 21 to Apr 4Transplant outside: Jun 13 to Jun 27
Start indoors: Mar 21 to Apr 4Transplant outside: Jun 13 to Jun 27
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 6 to Jun 20
Start indoors: Apr 4 to Apr 18Transplant outside: May 9 to May 23Sow outdoors: May 2 to Jun 6Plant for fall: Aug 2 to Aug 30
Start indoors: Apr 4 to Apr 18Transplant outside: May 2 to May 16Sow outdoors: May 2 to May 16Plant for fall: Jul 19 to Aug 9
Start indoors: Apr 4 to Apr 18Transplant outside: May 16 to May 30Plant for fall: Jun 21 to Jul 12
Start indoors: Apr 4 to Apr 18Transplant outside: May 9 to May 23Plant for fall: Jun 21 to Jul 12
Start indoors: Apr 4 to Apr 18Transplant outside: May 16 to May 30Plant for fall: Jun 21 to Jul 12
Start indoors: Apr 18 to May 2Transplant outside: Jun 20 to Jul 4Sow outdoors: Jun 20 to Jul 4
Start indoors: Apr 18 to May 2Transplant outside: Jun 6 to Jun 20
Sow outdoors: Apr 18 to May 9Plant for fall: Jul 5 to Jul 26
Sow outdoors: Apr 18 to May 9Plant for fall: Aug 2 to Aug 23
Sow outdoors: Apr 25 to Jun 6Plant for fall: Aug 16 to Sep 6
Start indoors: May 2 to May 9Transplant outside: Jun 13 to Jun 20Sow outdoors: Jun 6 to Jun 20Plant for fall: Jul 12 to Jul 26
Start indoors: May 2 to May 9Sow outdoors: Jun 6 to Jun 20Plant for fall: Jul 19 to Aug 2
Start indoors: May 2 to May 9Sow outdoors: Jun 6 to Jun 20
Start indoors: May 2 to May 9Transplant outside: Jun 13 to Jun 27
Sow outdoors: May 9 to Jun 6Plant for fall: Jul 5 to Jul 19
Sow outdoors: May 9 to Jun 6Plant for fall: Jul 19 to Aug 2
Sow outdoors: May 9 to May 30
Sow outdoors: May 16 to Jun 13Plant for fall: Jul 19 to Aug 2
Sow outdoors: May 16 to Jun 6Plant for fall: Aug 2 to Aug 23
Sow outdoors: Jun 6 to Jun 27Plant for fall: Jul 12 to Jul 26
Sow outdoors: Jun 6 to Jun 20
Transplant outside: Jun 13 to Jul 4
Plant for fall: Sep 13 to Oct 18
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Rumely, MI
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 7 – Mar 21 | May 2 – May 16 | — | — |
| Peppers | Mar 21 – Apr 4 | Jun 13 – Jun 27 | — | — |
| Eggplant | Mar 21 – Apr 4 | Jun 13 – Jun 27 | — | — |
| Tomatoes | Apr 4 – Apr 18 | Jun 6 – Jun 20 | — | — |
| Lettuce | Apr 4 – Apr 18 | May 9 – May 23 | May 2 – Jun 6 | Aug 2 – Aug 30 |
| Kale | Apr 4 – Apr 18 | May 2 – May 16 | May 2 – May 16 | Jul 19 – Aug 9 |
| Broccoli | Apr 4 – Apr 18 | May 16 – May 30 | — | Jun 21 – Jul 12 |
| Cabbage | Apr 4 – Apr 18 | May 9 – May 23 | — | Jun 21 – Jul 12 |
| Cauliflower | Apr 4 – Apr 18 | May 16 – May 30 | — | Jun 21 – Jul 12 |
| Okra | Apr 18 – May 2 | Jun 20 – Jul 4 | Jun 20 – Jul 4 | — |
| Basil | Apr 18 – May 2 | Jun 6 – Jun 20 | — | — |
| Peas | — | — | Apr 18 – May 9 | Jul 5 – Jul 26 |
| Spinach | — | — | Apr 18 – May 9 | Aug 2 – Aug 23 |
| Radishes | — | — | Apr 25 – Jun 6 | Aug 16 – Sep 6 |
| Cucumbers | May 2 – May 9 | Jun 13 – Jun 20 | Jun 6 – Jun 20 | Jul 12 – Jul 26 |
| Zucchini & Summer Squash | May 2 – May 9 | — | Jun 6 – Jun 20 | Jul 19 – Aug 2 |
| Winter Squash & Pumpkins | May 2 – May 9 | — | Jun 6 – Jun 20 | — |
| Melons & Watermelon | May 2 – May 9 | Jun 13 – Jun 27 | — | — |
| Carrots | — | — | May 9 – Jun 6 | Jul 5 – Jul 19 |
| Beets | — | — | May 9 – Jun 6 | Jul 19 – Aug 2 |
| Potatoes | — | — | May 9 – May 30 | — |
| Swiss Chard | — | — | May 16 – Jun 13 | Jul 19 – Aug 2 |
| Cilantro | — | — | May 16 – Jun 6 | Aug 2 – Aug 23 |
| Green Beans | — | — | Jun 6 – Jun 27 | Jul 12 – Jul 26 |
| Sweet Corn | — | — | Jun 6 – Jun 20 | — |
| Sweet Potatoes | — | Jun 13 – Jul 4 | — | — |
| Garlic | — | — | — | Sep 13 – Oct 18 |
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 Chatham Exp Farm, MI weather station, 8 km away (elevation 869 ft (265 m)).
Frost dates near Rumely
- Eben Junction May 30 · Sep 27
- Chatham May 30 · Sep 27
- Deerton May 30 · Sep 27
- Au Train May 30 · Sep 27
- Skandia May 13 · Oct 2
- Trenary May 27 · Sep 28
- Little Lake May 13 · Oct 2
- Munising May 16 · Oct 14
- Wetmore May 16 · Oct 14
- Gwinn May 13 · Oct 2
Frequently asked questions
When is the last frost in Rumely, MI?
The median last spring frost in Rumely, MI is May 30. There is still about a 10% chance of frost after June 21, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Rumely, MI?
The median first fall frost is September 27, with about a 10% chance of frost before September 6.
How long is the growing season in Rumely, MI?
About 120 days between the median last spring frost and first fall frost.
What planting zone is Rumely, MI?
Rumely, MI is in USDA hardiness zone 5a.