Frost Chart for United States

Source: Courtesy of National Climatic Center

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Find average frost dates for your last spring frost and first fall frost.

If you're a farmer or gardener, get planting dates by zip code, based on your average last spring frost date here.

Dates given are normal averages for a light freeze or frost (32°F); local weather and topography may cause considerable variations. The possibility of frost occurring after the spring dates and before the fall dates is 50 percent. The classification of freezing temperatures is usually based on their effect on plants, with the following commonly accepted categories:

Light freeze:

29°F to 32°F—tender plants killed, with little destructive effect on other vegetation.

Moderate freeze:

25°F to 28°F—widely destructive effect on most vegetation, with heavy damage to fruit blossoms and tender and semi-hardy plants.

Severe freeze:

24°F and colder—damage to most plants.

Frost Chart

Below are U.S. cities. Or, see Canadian cities.

City State

Growing
Season
(Days)

Last Frost
Spring
First Frost
Fall
Mobile AL 273 Feb. 28 Nov. 29
Juneau AK 148 May 8 Oct. 4
Phoenix AZ * * *
Tucson AZ 324 Jan. 19 Dec. 18
Pine Bluff AR 240 Mar. 16 Nov. 12
Eureka CA 323 Jan. 27 Dec. 16
Sacramento CA 296 Feb. 10 Dec. 4
San Francisco CA * * *
Denver CO 157 Apr. 30 Oct. 4
Hartford CT 166 Apr. 26 Oct. 9
Wilmington DE 202 Apr. 10 Oct. 30
Miami FL * * *
Tampa FL 338 Jan. 28 Jan. 3
Athens GA 227 Mar. 24 Nov. 7
Savannah GA 268 Mar. 1 Nov. 25
Boise ID 147 May 10 Oct. 6
Chicago IL 187 Apr. 20 Oct. 24
Springfield IL 182 Apr. 13 Oct. 13
Indianapolis IN 181 Apr. 17 Oct. 16
South Bend IN 175 Apr. 26 Oct. 19
Atlantic IA 148 May 2 Sept. 28
Cedar Rapids IA 163 Apr. 25 Oct. 6
Topeka KS 174 Apr. 19 Oct. 11
Lexington KY 192 Apr. 15 Oct. 25
Monroe LA 256 Mar. 3 Nov. 15
New Orleans LA 300 Feb. 12 Dec. 11
Portland ME 156 May 2 Oct. 6
Baltimore MD 200 Apr. 11 Oct. 29
Worcester MA 170 Apr. 26 Oct. 14
Lansing MI 145 May 10 Oct. 3
Marquette MI 154 May 11 Oct. 13
Duluth MN 124 May 21 Sept. 23
Willmar MN 154 Apr. 30 Oct. 1
Columbus MS 248 Mar. 13 Nov. 16
Vicksburg MS 240 Mar. 20 Nov. 16
Jefferson City MO 188 Apr. 13 Oct. 18
Fort Peck MT 141 May 8 Sept. 26
Helena MT 121 May 19 Sept. 18
Blair NE 167 Apr. 25 Oct. 10
North Platte NE 137 May 9 Sept. 24
Las Vegas NV 283 Feb. 16 Nov. 27
Concord NH 124 May 20 Sept. 21
Newark NJ 217 Apr. 3 Nov. 7
Carlsbad NM 215 Mar. 31 Nov. 2
Los Alamos NM 149 May 11 Oct. 8
Albany NY 153 May 2 Oct. 3
Syracuse NY 168 Apr. 28 Oct. 13
Fayetteville NC 222 Mar. 28 Nov. 5
Bismarck ND 129 May 14 Sept. 21
Akron OH 192 Apr. 18 Oct. 28
Cincinnati OH 192 Apr. 13 Oct. 23
Lawton OK 223 Mar. 29 Nov. 7
Tulsa OK 225 Mar. 27 Nov. 7
Pendleton OR 187 Apr. 13 Oct. 18
Portland OR 236 Mar. 23 Nov. 15
Franklin PA 164 May 6 Oct. 17
Williamsport PA 168 Apr. 30 Oct. 15
Kingston RI 147 May 8 Oct. 3
Charleston SC 260 Mar. 9 Nov. 25
Columbia SC 214 Apr. 1 Nov. 1
Rapid City SD 140 May 9 Sept. 27
Memphis TN 235 Mar. 22 Nov. 13
Nashville TN 204 Apr. 6 Oct. 28
Amarillo TX 185 Apr. 18 Oct. 20
Denton TX 243 Mar. 18 Nov. 16
San Antonio TX 270 Feb. 28 Nov. 25
Cedar City UT 133 May 21 Oct. 1
Spanish Fork UT 167 May 1 Oct. 16
Burlington VT 147 May 8 Oct. 3
Norfolk VA 247 Mar. 20 Nov. 23
Richmond VA 206 Apr. 6 Oct. 30
Seattle WA 251 Mar. 10 Nov. 17
Spokane WA 153 May 2 Oct. 3
Parkersburg WV 183 Apr. 21 Oct. 22
Green Bay WI 150 May 6 Oct. 4
Janesville WI 164 Apr. 28 Oct. 10
Casper WY 120 May 22 Sept. 19
* Frosts do not occur every year.

For more locations click here.

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Comments

I just won't to know when God

I just won't to know when God is going to tern on the AC. And get rid of thes 100+ days. It's hot in TX and my Hubby is a roofer so it wold be nice just being in the 90's.

Thank you for this

Thank you for this information I am a gardener and this information will really help me to start my vegetation period as you know "Little things make a big difference - some you can change your landscaping". After knowing this data I can now start my work in a appropriate time from my grains. I recently came to know about wholesale flower pots where we can plant flowers and even some light vegetables. I have no experience using this before have anyone of you used this before?

We are in a "90" year droute

We are in a "90" year droute down hear in TX. Didn't do one this year wish I was able but not allowed to us h2o out side.

so it frosts last nite, temp

so it frosts last nite, temp was 32 when I got up.... my tomatoes look very sad. what are the odds of them surviving this frost? It is supposed to get cold again tonite and I plan on covering them. Do you think they may survive??? It should not frost this late where I live, rural area south of KCMO. Tks Kat

Tomatoes are very sensitive

Tomatoes are very sensitive to frost; it will kill them. Even cold weather is harmful to their health, although it is not as deadly as frost. When you say that your plants "look sad" do you mean that they are limp and floppy or do sections of the leaves look very dark green and mushy like lettuce that's been in the fridge for too long? if that's the case... severe damage has occurred. It's a good idea to cover them with plastic sheeting or individually with inverted clear plastic jugs at night and uncover them during the day until all threat of frost has passed. As for survival...you will know for sure within the next week or two. Also, keep the plants and soil wet as the moisture raises the temp needed for frost to form.

Thank you for the

Thank you for the information. Now, we can grow our vegetables according to the table given above. I didn't know about much things. I am happy that this blog is providing many informative knowledge. Hope in the coming days also you will provide this kinds of knowledge. :D

Thanks. Now I known around

Thanks. Now I known around when I should start my vegetable garden. P.S. Does anybody know how to keep birds from eating the corn in your garden?

This answer depends on the

This answer depends on the size of your garden. In my garden, I tie 8 inch strips of thick tinfoil to poles and distribute them through out my garden. The wind causes a slight sound and the sun glinting off the tinfoil simulates movement, and this seems to keep the birds away from my plants. This would not be practical for large gardens.

When is the last frost date

When is the last frost date for Spring 2011 in Zachary Louisiana 70791

Catherine Boeckmann's picture

Hi--if you see the link at

Hi--if you see the link at the bottom, you can find your frost date by state. Then pick closest weather station. If you live near Baton Rouge, you can see that that the 50% probability of frost date (32 degrees) is February 26. Of course, this is based on 30 years of history--every year is different!