Frost dates for Algonac, MI
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
May 3
typical year
Safe to plant
May 23
frost is over in 9 of 10 years
First fall frost
October 18
typical year
Growing season
167 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Apr 5 – 19 | – |
| Spinach | – | Mar 22 – Apr 12 | Aug 23 – Sep 6 |
| Lettuce | – | Apr 5 – 26 | Aug 23 – Sep 6 |
| Radishes | – | Apr 5 – May 17 | Sep 6 – 20 |
| Onions | – | Apr 5 – 19 | – |
| Potatoes | – | Apr 12 – 26 | – |
| Carrots | – | Apr 12 – May 3 | Jul 26 – Aug 9 |
| Beets | – | Apr 5 – 19 | Aug 9 – 23 |
| Kale | Feb 22 – Mar 8 | Apr 5 – 19 | Aug 9 – 23 |
| Broccoli | Feb 22 – Mar 8 | Apr 19 – May 3 | Aug 9 – 23 |
| Cabbage | Feb 8 – 22 | Apr 5 – 19 | Aug 9 – 23 |
| Garlic | – | – | Sep 6 – 27 |
| Warm-season crops | |||
| Tomatoes | Mar 28 – Apr 11 | May 23 – Jun 6 | – |
| Peppers | Mar 21 – Apr 4 | May 30 – Jun 13 | – |
| Cucumbers | – | May 23 – Jun 13 | – |
| Zucchini | – | May 23 – Jun 20 | – |
| Pumpkins | – | May 23 – Jun 13 | – |
| Green beans | – | May 23 – Aug 9 | – |
| Sweet corn | – | May 23 – Jun 20 | – |
| Basil | Apr 18 – May 2 | May 30 – Jun 6 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | May 23 | May 3 | April 20 |
| Fall frost before | October 4 | October 18 | November 1 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around April 22 (May 8 in a late year), and the first one in fall around October 31.
Towns that use these dates
This is the nearest NOAA station with frost records for 2 towns.
Algonac, Marine City
Where these dates come from
NOAA weather station ALGONAC WWTP, MI US (USC00200106), 1991–2020 climate normals. It's the nearest station for 5 zip codes, all within 11 miles:
48001, 48023, 48028, 48039, 48054
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.