Frost Dates: First and last frost dates for Newberry Correctional Facility, MI

ℹ️ How to read these charts for the spring

As spring unfolds, the risk of frost gradually decreases each day until your tender plants are finally safe. The probabilities shown in the chart help you make smart decisions about when to plant.

While frost typically forms at 32°F, tender plants can be damaged even when temperatures are slightly higher. Air temperatures are often measured several feet above the ground, but temperatures at plant level can be several degrees colder. Protected areas like porches help by blocking radiational cooling. Given these variables, we consider 36°F the "caution zone" for frost-sensitive plants.

Key dates for your spring planting:

  • By July 10, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
  • Around June 16, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
  • Before May 31, there's still an 80% risk of frost — too early for tomatoes and other tender plants unless you're prepared to protect them

If the 10-day forecast shows no temperatures below 40°F, you might safely plant earlier than the above dates suggest. Many gardeners watch for this weather window to get a head start on the growing season.

In the Spring
Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
Last 16° Apr 17 Apr 13 Apr 10 Apr 7 Apr 5 Apr 2 Mar 31 Mar 28 Mar 23
Last 20° Apr 25 Apr 21 Apr 18 Apr 16 Apr 14 Apr 12 Apr 10 Apr 7 Apr 4
Last 24° May 10 May 5 May 2 Apr 29 Apr 26 Apr 23 Apr 20 Apr 17 Apr 12
Last 28° May 28 May 22 May 18 May 15 May 12 May 9 May 6 May 2 Apr 26
Last 32° Jun 19 Jun 13 Jun 8 Jun 4 Jun 1 May 28 May 24 May 19 May 13
Last 36° Jul 10 Jul 2 Jun 26 Jun 21 Jun 16 Jun 11 Jun 6 May 31 May 23

ℹ️ How to read these charts for the fall

As summer ends in Newberry Correctional Facility, MI, nighttime temperatures begin to drop, and your risk of frost increases with each passing day. Knowing when to expect frost helps you harvest sensitive crops and extend your growing season with protection methods.

The chart below shows the probability of experiencing specific temperatures on various dates. Here's what this means for your garden:

1
Early warning: Around September 12, there's a 20% chance of 32°F — start monitoring forecasts and have plant covers ready
2
Decision time: By September 24, there's a 50% chance of frost — harvest tomatoes, peppers, and other tender crops or prepare protection
3
Last chance: By October 5, there's an 80% chance of seeing 32°F — most tender plants will be damaged without protection
4
Another perspective: You have only a 1 in 5 chance of making it past October 5 without a freezing night

These probabilities help you time your end-of-season harvests and know when to apply protective measures like row covers, cloches, or cold frames to extend your harvest.

In the Fall
Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
First 16° Nov 1 Nov 6 Nov 9 Nov 12 Nov 15 Nov 18 Nov 21 Nov 24 Nov 29
First 20° Oct 24 Oct 29 Nov 2 Nov 5 Nov 8 Nov 11 Nov 14 Nov 18 Nov 23
First 24° Oct 9 Oct 14 Oct 18 Oct 22 Oct 25 Oct 29 Nov 1 Nov 5 Nov 11
First 28° Sep 23 Sep 28 Oct 2 Oct 6 Oct 9 Oct 12 Oct 15 Oct 19 Oct 24
First 32° Sep 6 Sep 12 Sep 17 Sep 20 Sep 24 Sep 27 Oct 1 Oct 5 Oct 11
First 36° Aug 22 Aug 27 Aug 31 Sep 4 Sep 7 Sep 10 Sep 14 Sep 18 Sep 23

📍 Frost Dates for other nearby locations

Or enter a new zipcode:

Data is provided by the NOAA National Centers for Environmental Information.