Frost dates for Lafayette, Louisiana
Lafayette doesn't get a freezing night every winter: about 99 years in 100 have one. In those years, half have had their last frost by February 13 and half their first by December 4.
Frost dates for
Lafayette, Louisiana
Last spring frost
February 13
Not every winter has one: about 99 years in 100 have a freezing night here. In those years, half have their last frost by this date, and 1 in 10 still have one after March 10.
First fall frost
December 4
In years with a freeze, half have their first one by this date, and 1 in 10 by November 13.
Growing season
299 days
Frost-free days in a typical year. 9 years in 10 get at least 263.
Hardiness zone
9a
2023 USDA map: the coldest night of winter averages 20°F to 25°F. It was 9a on the 2012 map too. All 5 ZIP codes within about 6 miles of the city's center are in zone 9a.
Stations near you disagree. NOAA's Lafayette Regional Airport (2 miles away, at 40 feet above sea level), the one we used, gives a typical last frost of February 13 and a typical first frost of December 4. NOAA's Grand Coteau (15 miles away, at 60 feet above sea level) gives a typical last frost of February 28 and a typical first frost of November 23. So the typical last frost could fall anywhere from February 13 to 28 and the typical first frost from November 23 to December 4, depending on whether your garden is more like one or the other. Local terrain matters: hillsides, valley floors, water and city heat can change frost dates a lot over a few miles. Treat the dates here as a starting point, and compare with a nearby gardener or your county extension office.
Print a year planner for Lafayette
Frost risk through the year
How sure are these dates?
A frost date is a probability, not a promise. NOAA worked out, from 30 years of nightly lows, how often the last spring frost and the first fall frost fall on each date. The middle column is the typical year. The outer columns are the early and late years that come about once a decade.
| Early year 1 in 10 | Typical year 1 in 2 | Late year 1 in 10 | |
|---|---|---|---|
| Last frost in spring | January 13 | February 13 | March 10 |
| First frost in fall | November 13 | December 4 | January 5 |
The frost-free season between them runs 299 days in a typical year. In 1 year in 10 it is 335 days or longer, and in 1 year in 10 it is 263 days or shorter.
- Hard freeze (28°F): about 82 years in 100 have one. In those years the last typically comes on January 27 and the first on December 30. It is a harder freeze than the 32°F frost line, cold enough to damage many garden plants; how hardy a crop is decides whether it comes through. (The National Weather Service's own hard-freeze threshold varies from office to office.)
- Frost possible (36°F at the station): typically last on March 3 and first on November 20. On clear, still nights the ground can be several degrees colder than the thermometer, so frost can form on plants when the official reading is in the mid-30s.
Planting calendar for Lafayette
These dates count from the typical last and first frosts, using the planting rules published by Colorado State University Extension (spring), Virginia Cooperative Extension (fall crops) and University of Minnesota Extension (garlic, where winters are hard). Weather in any one year can run early or late, so check the forecast before you plant tender crops.
Frost doesn't come every year here: about 99 years in 100 have at least one freezing night. The calendar is built on the dates for the years that do.
We don't give a garlic date here. The rule we use, from the University of Minnesota Extension, counts from the first killing frost, and it works where a hard freeze comes every year before the ground freezes. Your county's extension office can tell you when to plant garlic in your climate.
Your typical last frost comes before mid-February. Where winters are this mild, summer heat limits the garden as much as frost does, and most planting happens in fall and late winter. Your county's extension office publishes a calendar made for your climate.
| When | What to do | Why then |
|---|---|---|
| January | ||
| January 2 to 16 | Peppers Start seeds indoors | 6 to 8 weeks before planting out |
| January 9 to 23 | Tomatoes Start seeds indoors | 5 to 7 weeks before planting out |
| January 16 to 30 | Peas, spinach, lettuce, radishes, onion sets, turnips Sow outdoors, as early as | hardy crops: 2 to 4 weeks before the typical last frost |
| January 16 to 30 | Broccoli and cabbage Plant out, as early as | hardy crops: 2 to 4 weeks before the typical last frost |
| January 30 to February 13 | Beets, carrots, potatoes, Swiss chard Plant outdoors, as early as | semi-hardy crops: up to 2 weeks before the typical last frost |
| January 30 to February 13 | Cauliflower Plant out, as early as | semi-hardy: up to 2 weeks before the typical last frost |
| February | ||
| February 13 | Snap beans, sweet corn, cucumbers, summer squash Sow outdoors around | tender crops: around the typical last frost date |
| February 27 | Tomatoes, peppers, eggplant Plant out from | very tender: 2 weeks or more after the typical last frost |
| February 27 | Melons, winter squash, pumpkins, lima beans Sow outdoors from | very tender: 2 weeks or more after the typical last frost |
| July | ||
| July 9 to 23 | Cabbage for fall Start seeds | set the plants out by August 27 |
| July 29 to August 12 | Broccoli for fall Start seeds | set the plants out by September 16 |
| September | ||
| September 7 | Snap beans for fall Last date to sow | 60 days to harvest, plus 2 weeks for slower fall growth, plus 2 weeks because frost kills it |
| September 11 | Carrots for fall Last date to sow | 70 days to harvest, plus 2 weeks for slower fall growth |
| September 12 | Cucumbers for fall Last date to sow | 55 days to harvest, plus 2 weeks for slower fall growth, plus 2 weeks because frost kills it |
| September 16 | Peas for fall Last date to sow | 65 days to harvest, plus 2 weeks for slower fall growth |
| September 17 | Summer squash for fall Last date to sow | 50 days to harvest, plus 2 weeks for slower fall growth, plus 2 weeks because frost kills it |
| September 21 | Leaf lettuce and beets for fall Last date to sow | 60 days to harvest, plus 2 weeks for slower fall growth |
| October | ||
| October 1 | Turnips and kohlrabi for fall Last date to sow | 50 days to harvest, plus 2 weeks for slower fall growth |
| October 11 | Spinach for fall Last date to sow | 40 days to harvest, plus 2 weeks for slower fall growth |
| October 21 | Radishes for fall Last date to sow | 30 days to harvest, plus 2 weeks for slower fall growth |
| November | ||
| November 13 | Tomatoes, peppers, squash, melons, cucumbers Watch the forecast from | in 1 fall in 10 the first frost comes by this date; pick tender crops before a frost |
| November 28 to December 26 | Broccoli and cabbage Start seeds indoors | 5 to 7 weeks before planting them out |
| December | ||
| December 12 to January 9 | Cauliflower Start seeds indoors | 5 to 7 weeks before planting out |
| December 26 to January 16 | Eggplant Start seeds indoors | 6 to 9 weeks before planting out |
Want more insurance? Shift every spring date 25 days later. That plans around March 10, the date after which only 1 spring in 10 has a frost.
For spring bulbs such as tulips and daffodils, plant once the soil has cooled to about 50 to 55°F and keep going until a couple of weeks before the ground freezes. Our guide to fall planting explains how to tell.
Where these numbers come from
These dates come from NOAA's weather station Lafayette Regional Airport (station USW00013976), 2 miles from the center of Lafayette. It sits at about the same elevation, 40 feet above sea level. NOAA rates this station's record as standard: at least 24 of the 30 years, with gaps filled from nearby stations.
The same station also gives the frost dates for Broussard and Carencro.
Our ZIP code lookup matches these 3 ZIP codes to the same station, so they get the same dates: 70501, 70508, 70517. Hardiness zones are worked out separately for each ZIP code.
The nearest other places with pages
- Baton Rouge, Louisiana: last frost around February 25, first frost around November 26 (55 miles away)
- New Orleans, Louisiana: frost not every year (125 miles away)
- Beaumont, Texas: frost not every year (125 miles away)
See frost dates across Louisiana, or look up your own ZIP code for the station nearest you. Want the background? Read what a last frost date really means.