Frost Dates: First and last frost dates for Hesperia, MI
The charts on this page show the probabilities of receiving a certain temperature on a certain day. Some examples that might help:
- You have a small 20% chance of getting 32° by September 14.
- There is a 50% chance of being hit by a 32° frost starting around September 25
- You have a 80% chance of seeing 32° by October 5
- Said another way, you have a 1 in 5 chance at making it to that day without a 32° night.
Temperature | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
---|---|---|---|---|---|---|---|---|---|
First 16° | Oct 31 | Nov 7 | Nov 12 | Nov 16 | Nov 20 | Nov 23 | Nov 27 | Dec 2 | Dec 9 |
First 20° | Oct 21 | Oct 26 | Oct 30 | Nov 3 | Nov 6 | Nov 9 | Nov 12 | Nov 16 | Nov 21 |
First 24° | Oct 4 | Oct 11 | Oct 15 | Oct 19 | Oct 23 | Oct 26 | Oct 30 | Nov 4 | Nov 10 |
First 28° | Sep 23 | Sep 28 | Oct 2 | Oct 5 | Oct 8 | Oct 11 | Oct 14 | Oct 18 | Oct 23 |
First 32° | Sep 9 | Sep 14 | Sep 18 | Sep 22 | Sep 25 | Sep 28 | Oct 1 | Oct 5 | Oct 10 |
First 36° | Aug 21 | Aug 28 | Sep 1 | Sep 5 | Sep 9 | Sep 13 | Sep 17 | Sep 21 | Sep 28 |
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 2. 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 24, so we don't dare plant that early. We wait a few days and by June 9 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.
Temperature | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
---|---|---|---|---|---|---|---|---|---|
Last 16° | Apr 17 | Apr 13 | Apr 10 | Apr 8 | Apr 5 | Apr 3 | Mar 31 | Mar 28 | Mar 24 |
Last 20° | Apr 28 | Apr 23 | Apr 19 | Apr 16 | Apr 13 | Apr 10 | Apr 7 | Apr 3 | Mar 29 |
Last 24° | May 10 | May 5 | May 1 | Apr 28 | Apr 26 | Apr 23 | Apr 20 | Apr 16 | Apr 12 |
Last 28° | May 18 | May 13 | May 10 | May 7 | May 4 | May 2 | Apr 29 | Apr 25 | Apr 21 |
Last 32° | Jun 11 | Jun 4 | May 30 | May 26 | May 23 | May 19 | May 15 | May 10 | May 3 |
Last 36° | Jul 2 | Jun 24 | Jun 18 | Jun 13 | Jun 9 | Jun 4 | May 30 | May 24 | May 16 |
Data is provided by the NOAA National Centers for Environmental Information.