Frost Dates: First and last frost dates for Jennings, 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 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 February 19, so we don't dare plant that early. We wait a few days and by March 6 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° Dec 28 -- -- -- -- -- -- -- --
Last 20° Jan 15 Dec 31 -- -- -- -- -- -- --
Last 24° Feb 20 Feb 9 Jan 31 Jan 23 Jan 14 Jan 2 -- -- --
Last 28° Mar 6 Feb 23 Feb 15 Feb 8 Feb 2 Jan 26 Jan 18 Jan 7 --
Last 32° Mar 22 Mar 11 Mar 3 Feb 25 Feb 19 Feb 13 Feb 6 Jan 29 Jan 19
Last 36° Mar 29 Mar 21 Mar 15 Mar 10 Mar 6 Mar 1 Feb 24 Feb 19 Feb 11

How to read these charts for the fall
As your growing season comes to an end, the nightly temperatures for Jennings, 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 10, and by December 18 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 18.
  2. There is a 50% chance of being hit by a 32° frost starting around December 3
  3. You have a 80% chance of seeing 32° by December 18
  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 14 -- -- -- -- -- -- -- --
First 20° Jan 2 Jan 17 -- -- -- -- -- -- --
First 24° Dec 10 Dec 22 Jan 1 Jan 10 Jan 19 Feb 3 -- -- --
First 28° Nov 23 Dec 4 Dec 12 Dec 20 Dec 26 Jan 2 Jan 11 Jan 22 --
First 32° Nov 10 Nov 18 Nov 24 Nov 29 Dec 3 Dec 8 Dec 12 Dec 18 Dec 26
First 36° Oct 30 Nov 5 Nov 10 Nov 14 Nov 17 Nov 21 Nov 25 Nov 29 Dec 5

Frost Dates for other nearby locations
  • Lake Arthur, LA
  • Crowley, LA
  • Oberlin Fire Twr, LA
  • Rockefeller Wl Refuge, LA
  • Lake Charles, LA
  • Elizabeth, LA
  • Grand Coteau, LA
  • Lafayette Fcwos, LA
  • New Iberia Acadiana, LA
  • Hackberry, LA

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