Frost Dates: First and last frost dates for Morgan City, LA
ℹ️ How to read these charts for the spring
As spring unfolds, the risk of frost gradually decreases each day until your tender plants are finally safe. The probabilities shown in the chart help you make smart decisions about when to plant.
While frost typically forms at 32°F, tender plants can be damaged even when temperatures are slightly higher. Air temperatures are often measured several feet above the ground, but temperatures at plant level can be several degrees colder. Protected areas like porches help by blocking radiational cooling. Given these variables, we consider 36°F the "caution zone" for frost-sensitive plants.
Key dates for your spring planting:
- By March 24, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
- Around February 27, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
- Before February 10, there's still an 80% risk of frost — too early for tomatoes and other tender plants unless you're prepared to protect them
If the 10-day forecast shows no temperatures below 40°F, you might safely plant earlier than the above dates suggest. Many gardeners watch for this weather window to get a head start on the growing season.
| Temperature | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| Last 16° | Dec 28 | -- | -- | -- | -- | -- | -- | -- | -- |
| Last 20° | Jan 22 | Dec 22 | -- | -- | -- | -- | -- | -- | -- |
| Last 24° | Feb 9 | Jan 21 | Dec 26 | -- | -- | -- | -- | -- | -- |
| Last 28° | Feb 22 | Feb 11 | Feb 2 | Jan 24 | Jan 15 | Jan 2 | -- | -- | -- |
| Last 32° | Mar 3 | Feb 21 | Feb 14 | Feb 7 | Feb 1 | Jan 25 | Jan 17 | Jan 4 | -- |
| Last 36° | Mar 24 | Mar 16 | Mar 9 | Mar 4 | Feb 27 | Feb 22 | Feb 17 | Feb 10 | Feb 1 |
ℹ️ How to read these charts for the fall
As summer ends in Morgan City, LA, nighttime temperatures begin to drop, and your risk of frost increases with each passing day. Knowing when to expect frost helps you harvest sensitive crops and extend your growing season with protection methods.
The chart below shows the probability of experiencing specific temperatures on various dates. Here's what this means for your garden:
These probabilities help you time your end-of-season harvests and know when to apply protective measures like row covers, cloches, or cold frames to extend your harvest.
| Temperature | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| First 16° | Jan 14 | -- | -- | -- | -- | -- | -- | -- | -- |
| First 20° | Jan 2 | Jan 17 | -- | -- | -- | -- | -- | -- | -- |
| First 24° | Dec 29 | Jan 9 | Jan 24 | -- | -- | -- | -- | -- | -- |
| First 28° | Dec 10 | Dec 21 | Dec 30 | Jan 7 | Jan 16 | Jan 27 | -- | -- | -- |
| First 32° | Nov 28 | Dec 5 | Dec 10 | Dec 15 | Dec 19 | Dec 23 | Dec 29 | Jan 6 | -- |
| First 36° | Nov 17 | Nov 23 | Nov 28 | Dec 2 | Dec 6 | Dec 9 | Dec 13 | Dec 18 | Dec 25 |
📍 Frost Dates for other nearby locations
- Houma, LA 25.6 mi
- Franklin, LA 26.6 mi
- Donaldsonville, LA 28.2 mi
- Carville, LA 35.0 mi
- Jeanerette, LA 40.9 mi
- Lsu Ben-hur Farm, LA 46.3 mi
- Reserve, LA 48.6 mi
- New Iberia Acadiana, LA 54.0 mi
- Baton Rouge Metro, LA 58.3 mi
- Galliano, LA 62.7 mi
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Data is provided by the NOAA National Centers for Environmental Information.