Frost Dates: First and last frost dates for Sealy, TX
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 30, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
- Around March 8, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
- Before February 21, 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° | Jan 3 | -- | -- | -- | -- | -- | -- | -- | -- |
| Last 20° | Jan 25 | Jan 14 | Jan 3 | Dec 18 | -- | -- | -- | -- | -- |
| Last 24° | Feb 18 | Feb 7 | Jan 30 | Jan 23 | Jan 15 | Jan 7 | Dec 27 | -- | -- |
| Last 28° | Mar 9 | Feb 25 | Feb 15 | Feb 8 | Jan 31 | Jan 24 | Jan 16 | Jan 6 | Dec 21 |
| Last 32° | Mar 17 | Mar 8 | Mar 1 | Feb 23 | Feb 18 | Feb 12 | Feb 6 | Jan 31 | Jan 21 |
| Last 36° | Mar 30 | Mar 22 | Mar 17 | Mar 12 | Mar 8 | Mar 3 | Feb 26 | Feb 21 | Feb 13 |
ℹ️ How to read these charts for the fall
As summer ends in Sealy, TX, 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 6 | -- | -- | -- | -- | -- | -- | -- | -- |
| First 20° | Dec 21 | Jan 1 | Jan 12 | Jan 28 | -- | -- | -- | -- | -- |
| First 24° | Dec 2 | Dec 13 | Dec 21 | Dec 28 | Jan 4 | Jan 13 | Jan 26 | -- | -- |
| First 28° | Nov 20 | Nov 29 | Dec 5 | Dec 11 | Dec 16 | Dec 21 | Dec 27 | Jan 3 | Jan 14 |
| First 32° | Nov 7 | Nov 17 | Nov 25 | Dec 2 | Dec 8 | Dec 14 | Dec 21 | Dec 29 | Jan 9 |
| First 36° | Oct 27 | Nov 3 | Nov 7 | Nov 12 | Nov 15 | Nov 19 | Nov 23 | Nov 28 | Dec 5 |
📍 Frost Dates for other nearby locations
- Columbus, TX 28.8 mi
- Brenham, TX 31.0 mi
- Pierce, TX 37.5 mi
- Washington Sp, TX 37.9 mi
- Sugar Land, TX 38.2 mi
- Thompsons, TX 42.1 mi
- Somerville Dam, TX 46.7 mi
- Danevang, TX 50.0 mi
- La Grange, TX 50.2 mi
- Bay City Wtr Wks, TX 56.7 mi
Or enter a new zipcode:
Data is provided by the NOAA National Centers for Environmental Information.