Frost Dates: First and last frost dates for crivitz high falls, wi
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 10.
- There is a 50% chance of being hit by a 32° frost starting around September 19
- You have a 80% chance of seeing 32° by September 28
- 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 23 | Oct 28 | Nov 1 | Nov 4 | Nov 7 | Nov 9 | Nov 12 | Nov 16 | Nov 21 |
First 20° | Oct 10 | Oct 15 | Oct 19 | Oct 22 | Oct 26 | Oct 29 | Nov 1 | Nov 5 | Nov 10 |
First 24° | Sep 27 | Oct 3 | Oct 7 | Oct 11 | Oct 15 | Oct 18 | Oct 22 | Oct 26 | Nov 1 |
First 28° | Sep 21 | Sep 26 | Sep 29 | Oct 2 | Oct 5 | Oct 8 | Oct 10 | Oct 14 | Oct 18 |
First 32° | Sep 5 | Sep 10 | Sep 13 | Sep 16 | Sep 19 | Sep 21 | Sep 24 | Sep 28 | Oct 2 |
First 36° | Aug 25 | Aug 30 | Sep 3 | Sep 6 | Sep 9 | Sep 12 | Sep 15 | Sep 19 | Sep 24 |
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 June 29. 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 28, so we don't dare plant that early. We wait a few days and by June 10 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 18 | Apr 14 | Apr 11 | Apr 8 | Apr 6 | Apr 4 | Apr 1 | Mar 29 | Mar 25 |
Last 20° | May 2 | Apr 28 | Apr 25 | Apr 22 | Apr 20 | Apr 17 | Apr 15 | Apr 12 | Apr 8 |
Last 24° | May 12 | May 7 | May 4 | May 1 | Apr 29 | Apr 26 | Apr 23 | Apr 20 | Apr 15 |
Last 28° | May 27 | May 22 | May 18 | May 15 | May 12 | May 9 | May 6 | May 2 | Apr 27 |
Last 32° | Jun 7 | Jun 3 | May 30 | May 27 | May 25 | May 22 | May 19 | May 16 | May 12 |
Last 36° | Jun 29 | Jun 22 | Jun 18 | Jun 14 | Jun 10 | Jun 6 | Jun 2 | May 28 | May 22 |
Data is provided by the NOAA National Centers for Environmental Information.