Frost dates for 95387Westley, CA
The average last spring frost in Westley is February 25 and the average first fall frost is November 26, giving a typical growing season of about 272 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Feb 25
- Average first fall frost
- Nov 26
- Growing season
- 272 days
Safer after Apr 6 (1-in-10 risk)
Possible by Nov 8 (1-in-10 risk)
First frost typically in 30 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Feb 28 · Apr 3 · Apr 23 | Oct 26 · Nov 12 · Nov 26 | 222 days | 100% |
| Frost / freeze (32°F) | Jan 24 · Feb 25 · Apr 6 | Nov 8 · Nov 26 · Dec 12 | 272 days | 100% |
| Hard freeze (28°F) | Dec 26 · Jan 18 · Feb 21 | Nov 25 · Dec 11 · Jan 4 | 327 days | 95% |
Planting calendar for Westley
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Jan 25 – Apr 2 |
| Tomatoes | Transplant outdoors | Mar 13 – Aug 6 |
| Peppers | Start seeds indoors | Jan 25 – Feb 25 |
| Peppers | Transplant outdoors | Mar 27 – Apr 27 |
| Eggplant | Start seeds indoors | Feb 11 – Mar 12 |
| Eggplant | Transplant outdoors | Mar 27 – Apr 27 |
| Cucumbers | Sow outdoors | Mar 27 – Aug 16 |
| Summer squash | Sow outdoors | Mar 13 – Apr 27 |
| Winter squash & pumpkins | Sow outdoors | Mar 27 – Apr 27 |
| Snap beans | Sow outdoors | Mar 13 – Sep 8 |
| Sweet corn | Sow outdoors | Mar 13 – Aug 6 |
| Watermelon & cantaloupe | Sow outdoors | Mar 27 – Apr 27 |
| Okra | Sow outdoors | Mar 20 – Apr 12 |
| Peas | Sow outdoors (spring) | Jan 25 – Mar 12 |
| Potatoes | Plant outdoors (spring) | Jan 25 – Mar 27 |
| Onions | Start seeds indoors (spring) | Dec 14 – Jan 10 |
| Onions | Transplant outdoors (spring) | Feb 11 – Mar 12 |
| Broccoli | Start seeds indoors (spring) | Jan 7 – Feb 10 |
| Broccoli | Transplant outdoors (spring) | Feb 11 – Mar 12 |
| Broccoli | Start seeds indoors (fall) | Jul 27 – Aug 6 |
| Broccoli | Transplant outdoors (fall) | Aug 26 – Sep 6 |
| Cabbage | Start seeds indoors (spring) | Dec 28 – Jan 25 |
| Cabbage | Transplant outdoors (spring) | Jan 25 – Feb 25 |
| Cabbage | Start seeds indoors (fall) | Jul 17 – Aug 16 |
| Cabbage | Transplant outdoors (fall) | Aug 16 – Sep 16 |
| Leaf lettuce | Sow outdoors (spring) | Jan 25 – Apr 12 |
| Leaf lettuce | Sow outdoors (fall) | Aug 16 – Oct 2 |
| Spinach | Sow outdoors (spring) | Jan 18 – Mar 3 |
| Spinach | Sow outdoors (fall) | Sep 2 – Oct 7 |
| Radishes | Sow outdoors (spring) | Jan 25 – Mar 17 |
| Radishes | Sow outdoors (fall) | Aug 16 – Oct 17 |
| Kale | Sow outdoors (spring) | Feb 11 – Mar 3 |
| Kale | Sow outdoors (fall) | Aug 9 – Sep 16 |
| Carrots | Sow outdoors (spring) | Feb 25 – Apr 12 |
| Carrots | Sow outdoors (fall) | Jul 17 – Sep 1 |
| Garlic | Plant outdoors (fall) | Nov 16 – Dec 17 |
Where these dates come from
ZIP code 95387 is matched to the NOAA station Tracy Carbona, CA, 18.6 km away, at 135 ft elevation (4 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Tracy Carbona, CA (used) | 135 ft | Feb 25 | Nov 26 |
| Modesto City Co Ap, CA | 73 ft | Jan 31 | Dec 5 |
| Turlock #2, CA | 103 ft | Jan 6 | Dec 20 |
| Newman, CA | 90 ft | Feb 26 | Nov 29 |
Frost dates near Westley
- Vernalis, CA 95385 · last Feb 25, first Nov 26
- Patterson, CA 95363 · last Jan 31, first Dec 5
- Modesto, CA 95358 · last Jan 31, first Dec 5
- Crows Landing, CA 95313 · last Feb 26, first Nov 29
- Salida, CA 95368 · last Jan 31, first Dec 5
- Tracy, CA 95378 · last Feb 25, first Nov 26
- Ripon, CA 95366 · last Feb 6, first Dec 1
- Ceres, CA 95307 · last Jan 31, first Dec 5
Frequently asked questions
- When is the last frost in Westley, CA?
- For ZIP code 95387, the average last spring frost (32°F) is February 25, based on NOAA 1991-2020 climate normals for the Tracy Carbona, CA weather station. There is a 1-in-10 chance of a frost after April 6.
- When is the first frost in Westley, CA?
- The average first fall frost (32°F) is November 26. There is a 1-in-10 chance of frost by November 8, so tender plants are at risk from that point on.
- How long is the growing season in 95387?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 272 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.