Frost Dates: First and last frost dates for Brawley, CA
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 8, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
- Around February 15, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
- Before February 1, 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° | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Last 20° | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Last 24° | Dec 28 | -- | -- | -- | -- | -- | -- | -- | -- |
| Last 28° | Feb 7 | Jan 26 | Jan 17 | Jan 9 | Dec 29 | Dec 11 | -- | -- | -- |
| Last 32° | Feb 23 | Feb 13 | Feb 5 | Jan 30 | Jan 24 | Jan 18 | Jan 11 | Jan 4 | Dec 24 |
| Last 36° | Mar 8 | Mar 1 | Feb 24 | Feb 19 | Feb 15 | Feb 11 | Feb 6 | Feb 1 | Jan 25 |
ℹ️ How to read these charts for the fall
As summer ends in Brawley, CA, 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° | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| First 20° | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| First 24° | Dec 27 | -- | -- | -- | -- | -- | -- | -- | -- |
| First 28° | Dec 6 | Dec 16 | Dec 25 | Jan 3 | Jan 14 | -- | -- | -- | -- |
| First 32° | Nov 17 | Nov 24 | Nov 29 | Dec 3 | Dec 7 | Dec 11 | Dec 16 | Dec 21 | Dec 28 |
| First 36° | Nov 11 | Nov 16 | Nov 20 | Nov 23 | Nov 25 | Nov 28 | Dec 1 | Dec 4 | Dec 9 |
📍 Frost Dates for other nearby locations
- Imperial, CA 10.6 mi
- El Centro, CA 15.9 mi
- Hayfield Pumping Plt, CA 50.2 mi
- Mecca Fire Stn, CA 56.4 mi
- Eagle Mtn, CA 56.8 mi
- Thermal Fcwos, CA 63.3 mi
- Borrego Desert Park, CA 65.1 mi
- Yuma Citrus Stn, AZ 65.6 mi
- Blythe Asos, CA 69.9 mi
- Indio Fire Stn, CA 69.9 mi
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Data is provided by the NOAA National Centers for Environmental Information.