Frost Dates: First and last frost dates for newberry correctional facility, mi

How to read these charts for the fall
As your growing season comes to an end, the nightly temperatures for newberry correctional facility, mi start to go down, and therefore every day that goes by increases the chance that you'll get frost. Your risk of frost really begins around September 6, and by October 5 you're almost certain to have received at least one frost event.

The charts on this page show the probabilities of receiving a certain temperature on a certain day. Some examples that might help:

  1. You have a small 20% chance of getting 32° by September 12.
  2. There is a 50% chance of being hit by a 32° frost starting around September 24
  3. You have a 80% chance of seeing 32° by October 5
  4. Said another way, you have a 1 in 5 chance at making it to that day without a 32° night.
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

How to read these charts for the spring
As the growing season approaches, the days get longer, the weather begins to warm up, and the nights start being less cold. You're still getting frost, but the chance of nightly frosts gets less and less with each passing day. Eventually, the frost stops, and this is when your tender plants are fully safe. So, how do you plan for this? The probabilities on this page help you assess your risk of frost on any given day.

What's a safe temperature for tender plants? When the nightly temperature falls, frost can form, even above 32°, because the air is colder high above the ground and the frost can form up there and then fall down onto your garden and do some damage, even if it's 36° on the ground. So many factors come into play, including wind, concrete, houses, trees and other structures, etc etc etc. Because of all this, you might want to consider 36° as "the danger zone".

In your average springtime, you have a 90% chance that there will be no 36° nights by July 10. In other words, you can pretty much count on being safe from frost by that day. But we want to get those tomatoes in the ground as soon as possible, right? We see that there's still an 80% chance of 36° on May 31, so we don't dare plant that early. We wait a few days and by June 16 we are at the 50/50 point. At this point, we are close and we can start watching the weather forecast. If the upcoming week's forecast doesn't show below 40°, then it's probably okay to risk planting out your plants.

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

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