Frost Dates: First and last frost dates for Canyon Dam, 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 April 2, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
- Around March 17, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
- Before March 7, 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° | Feb 1 | Jan 12 | -- | -- | -- | -- | -- | -- | -- |
| Last 20° | Feb 13 | Feb 3 | Jan 25 | Jan 17 | Jan 7 | Dec 21 | -- | -- | -- |
| Last 24° | Feb 25 | Feb 15 | Feb 8 | Feb 1 | Jan 26 | Jan 20 | Jan 13 | Jan 4 | Dec 19 |
| Last 28° | Mar 10 | Feb 28 | Feb 21 | Feb 15 | Feb 9 | Feb 3 | Jan 27 | Jan 19 | Jan 7 |
| Last 32° | Mar 21 | Mar 12 | Mar 6 | Mar 1 | Feb 24 | Feb 19 | Feb 14 | Feb 7 | Jan 30 |
| Last 36° | Apr 2 | Mar 28 | Mar 24 | Mar 20 | Mar 17 | Mar 14 | Mar 11 | Mar 7 | Mar 1 |
ℹ️ How to read these charts for the fall
As summer ends in Canyon Dam, 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 4 | Jan 27 | -- | -- | -- | -- | -- | -- | -- |
| First 20° | Dec 20 | Dec 31 | Jan 8 | Jan 17 | Jan 26 | Feb 12 | -- | -- | -- |
| First 24° | Dec 3 | Dec 13 | Dec 21 | Dec 27 | Jan 3 | Jan 9 | Jan 17 | Jan 28 | -- |
| First 28° | Nov 16 | Nov 25 | Dec 1 | Dec 7 | Dec 12 | Dec 17 | Dec 23 | Dec 30 | Jan 10 |
| First 32° | Nov 11 | Nov 18 | Nov 23 | Nov 27 | Dec 1 | Dec 5 | Dec 9 | Dec 14 | Dec 21 |
| First 36° | Oct 31 | Nov 7 | Nov 11 | Nov 15 | Nov 19 | Nov 23 | Nov 27 | Dec 2 | Dec 8 |
📍 Frost Dates for other nearby locations
- New Braunfels, TX 11.7 mi
- San Marcos, TX 17.4 mi
- Blanco, TX 22.9 mi
- San Antonio, TX 29.7 mi
- Johnson City, TX 32.5 mi
- Boerne, TX 37.3 mi
- Luling, TX 39.8 mi
- Austin-camp Mabry, TX 43.7 mi
- Floresville, TX 50.9 mi
- Red Rock, TX 52.4 mi
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Data is provided by the NOAA National Centers for Environmental Information.