Freeze and Frost Dates

The most important factor in determining when to plant a certain type of vegetable in your garden is the “Last Freeze Date” in the spring, and the “First Freeze Date” in the fall for your area. These dates for a given area are based on historical weather data from that area over a 30 year period compiled by the National Climatic Data Center.

The actual dates that the freezing temperatures occurred each year in a given area, during this 30 year period, are averaged together. Probabilities of a freeze occurring are then assigned to these average dates.

Let’s look at an example.
Last Freeze Date for Abilene, TX
This chart shows the Last Freeze/Frost dates for Abeline, TX.

The first column shows the City and State name.

The second column shows three temperatures. The first temperature, 36°F, is the Frost temperature. Temperature monitoring stations are typically mounted four to six feet above the ground. During clear, calm, and cold nights the temperature at ground level, where your garden is, can become much colder. The second temperature, 32°F, is the Freeze temperature. The third temperature is the Hard Freeze temperature.

The third column titled Spring Date has three sub-columns in it titled Probability Level 90, 50, and 10 with dates listed under them. The lower the probability level number, the less likely it is that a Frost, Freeze, or Hard Freeze will occur on that date.

The Last Freeze Date for this example is April 10. This means that there is only a 10 percent chance that it will freeze on this date. Remember, although statistically accurate, you are really just playing the odds with this date. Before planting you should ALWAYS check your local weather to see if a freeze is in the forecast.

In the table below, click on your state specific data then look for your city’s information in the next screen.

StateClick for Chart
AlabamaAL - Data Sheet
AlaskaAK - Data Sheet
ArizonaAZ - Data Sheet
ArkansasAR - Data Sheet
CaliforniaCA - Data Sheet
ColoradoCO - Data Sheet
ConnecticutCT - Data Sheet
DelawareDE - Data Sheet
FloridaFL - Data Sheet
GeorgiaGA - Data Sheet
HawaiiHI - Data Sheet
IdahoID - Data Sheet
IllinoisIL - Data Sheet
IndianaIN - Data Sheet
IowaIA - Data Sheet
KansasKS - Data Sheet
KentuckyKY - Data Sheet
LouisianaLA - Data Sheet
MaineME - Data Sheet
MarylandMD - Data Sheet
MassachusettsMA - Data Sheet
MichiganMI - Data Sheet
MinnesotaMN - Data Sheet
MississippiMS - Data Sheet
MissouriMO - Data Sheet
MontanaMT - Data Sheet
NebraskaNE - Data Sheet
NevadaNV - Data Sheet
New HampshireNH - Data Sheet
New JerseyNJ - Data Sheet
New MexicoNM - Data Sheet
New YorkNY - Data Sheet
North CarolinaNC - Data Sheet
North DakotaND - Data Sheet
OhioOH - Data Sheet
OklahomaOK - Data Sheet
OregonOR - Data Sheet
PennsylvaniaPA - Data Sheet
Rhode IslandRI - Data Sheet
South CarolinaSC - Data Sheet
South DakotaSD - Data Sheet
TennesseeTN - Data Sheet
TexasTX - Data Sheet
UtahUT - Data Sheet
VermontVT - Data Sheet
VirginiaVA - Data Sheet
WashingtonWA - Data Sheet
West VirginiaWV - Data Sheet
WisconsinWI - Data Sheet
WyomingWY - Data Sheet

I hope you find this information helpful and I wish you Happy (freeze damage free) Planting.

Data Source: National Climatic Data Center

8 thoughts on “Freeze and Frost Dates”

    1. Mike – I get my data from the National Climatic Data Center. It looks like the information that would be most applicable to Kansas City, Kansas would probably be found in the Missouri data sheet, listed under “KANSAS CITY DOWNTOWN AP.” Hope this helps.

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