Frost Dates: First and last frost dates for Reserve, LA

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 March 27. 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 February 17, so we don't dare plant that early. We wait a few days and by March 4 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° Jan 8 -- -- -- -- -- -- -- --
Last 20° Jan 26 Jan 11 Dec 23 -- -- -- -- -- --
Last 24° Feb 13 Feb 1 Jan 23 Jan 14 Dec 31 -- -- -- --
Last 28° Mar 4 Feb 23 Feb 17 Feb 11 Feb 6 Jan 31 Jan 25 Jan 18 Jan 3
Last 32° Mar 18 Mar 9 Mar 3 Feb 26 Feb 21 Feb 16 Feb 11 Feb 5 Jan 27
Last 36° Mar 27 Mar 19 Mar 14 Mar 9 Mar 4 Feb 28 Feb 23 Feb 17 Feb 10

How to read these charts for the fall
As your growing season comes to an end, the nightly temperatures for Reserve, LA 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 November 21, and by December 20 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 November 27.
  2. There is a 50% chance of being hit by a 32° frost starting around December 9
  3. You have a 80% chance of seeing 32° by December 20
  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° Jan 15 -- -- -- -- -- -- -- --
First 20° Jan 3 Jan 18 Feb 7 -- -- -- -- -- --
First 24° Dec 19 Dec 28 Jan 5 Jan 13 Jan 25 -- -- -- --
First 28° Nov 26 Dec 6 Dec 13 Dec 20 Dec 26 Jan 1 Jan 7 Jan 16 Feb 1
First 32° Nov 21 Nov 27 Dec 1 Dec 5 Dec 9 Dec 12 Dec 16 Dec 20 Dec 27
First 36° Nov 2 Nov 9 Nov 14 Nov 19 Nov 23 Nov 27 Dec 1 Dec 6 Dec 13

Frost Dates for other nearby locations
  • New Orleans, LA
  • New Orleans Audubon, LA
  • Donaldsonville, LA
  • Houma, LA
  • Carville, LA
  • Galliano, LA
  • Covington, LA
  • Amite, LA
  • Lsu Ben-hur Farm, LA
  • Morgan City, LA

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