🌷 2026 Last Frost Dates for Sunnyvale, California 94087
The last 36°F Spring frost date is 30% likely to be on Feb 19. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on Jan 18. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Sunnyvale, CA are based on historical climate data.
Always check your local forecast for the most up-to-date frost warnings.
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What is a Last Frost Date?
The last spring frost signals when your area is safe from freezing temperatures. Tender plants can now grow outdoors without cold damage! This marks the beginning of the growing season. Last spring frost serves as your essential starting point for planting warm-season crops. It's also time to remove winter protection from your perennials. Enjoy the longer days and warmer weather!
How to use the Last Frost Date?
Start seeds indoors several weeks before your last frost date. This gives plants time to reach transplanting size when weather permits. Plan your outdoor planting schedule around your area's average last frost date. Plant some crops before and some after this date to protect against weather changes. Look for spots in your yard where frost stays longer or disappears earlier. Create your own frost map to use all available growing space and extend your season. Keep watching your local weather forecast to catch any surprise late frosts.
Last Frost Date Probabilities
| Probability of frost (36°F) on or after… | |
|---|---|
| 10% chance | Mar 6 |
| 20% chance | Feb 27 |
| 30% chance | Feb 19 |
| 40% chance | Feb 12 |
| 50% chance | Feb 6 |
| 60% chance | Jan 31 |
| 70% chance | Jan 26 |
| 80% chance | Jan 15 |
| 90% chance | Jan 3 |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | Feb 4 |
| 20% chance | Jan 26 |
| 30% chance | Jan 18 |
| 40% chance | Jan 11 |
| 50% chance | Jan 6 |
| 60% chance | Jan 1 |
| 70% chance | Dec 29 |
| 80% chance | Dec 24 |
| 90% chance | Dec 16 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | Jan 22 |
| 20% chance | Jan 14 |
| 30% chance | Jan 8 |
| 40% chance | Jan 5 |
| 50% chance | Jan 1 |
| 60% chance | Dec 31 |
| 70% chance | Dec 27 |
| 80% chance | Dec 22 |
| 90% chance | Dec 16 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | rarely |
| 20% chance | rarely |
| 30% chance | rarely |
| 40% chance | rarely |
| 50% chance | rarely |
| 60% chance | rarely |
| 70% chance | rarely |
| 80% chance | rarely |
| 90% chance | rarely |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | rarely |
| 20% chance | rarely |
| 30% chance | rarely |
| 40% chance | rarely |
| 50% chance | rarely |
| 60% chance | rarely |
| 70% chance | rarely |
| 80% chance | rarely |
| 90% chance | rarely |
| Probability of severe hard freeze (16°F) on or after… | |
|---|---|
| 10% chance | rarely |
| 20% chance | rarely |
| 30% chance | rarely |
| 40% chance | rarely |
| 50% chance | rarely |
| 60% chance | rarely |
| 70% chance | rarely |
| 80% chance | rarely |
| 90% chance | rarely |
Agricultural climatic data from weather station: MOFFETT FEDERAL AIRFIELD (USW00023244:frost)