Frost dates for 76943Ozona, TX
The average last spring frost in Ozona is March 21 and the average first fall frost is November 6, giving a typical growing season of about 227 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 21
- Average first fall frost
- Nov 6
- Growing season
- 227 days
Safer after Apr 12 (1-in-10 risk)
Possible by Oct 24 (1-in-10 risk)
First frost typically in 3 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) | Mar 18 · Apr 7 · Apr 25 | Oct 17 · Oct 31 · Nov 11 | 204 days | 100% |
| Frost / freeze (32°F) | Mar 3 · Mar 21 · Apr 12 | Oct 24 · Nov 6 · Nov 21 | 227 days | 100% |
| Hard freeze (28°F) | Feb 20 · Mar 8 · Mar 29 | Nov 1 · Nov 16 · Dec 2 | 251 days | 100% |
Planting calendar for Ozona
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 | Feb 18 – Apr 26 |
| Tomatoes | Transplant outdoors | Apr 6 – Jul 17 |
| Peppers | Start seeds indoors | Feb 18 – Mar 21 |
| Peppers | Transplant outdoors | Apr 20 – May 21 |
| Eggplant | Start seeds indoors | Mar 7 – Apr 5 |
| Eggplant | Transplant outdoors | Apr 20 – May 21 |
| Cucumbers | Sow outdoors | Apr 20 – Jul 27 |
| Summer squash | Sow outdoors | Apr 6 – May 21 |
| Winter squash & pumpkins | Sow outdoors | Apr 20 – May 21 |
| Snap beans | Sow outdoors | Apr 6 – Aug 19 |
| Sweet corn | Sow outdoors | Apr 6 – Jul 17 |
| Watermelon & cantaloupe | Sow outdoors | Apr 20 – May 21 |
| Okra | Sow outdoors | Apr 13 – May 6 |
| Peas | Sow outdoors (spring) | Feb 18 – Apr 5 |
| Potatoes | Plant outdoors (spring) | Feb 18 – Apr 20 |
| Onions | Start seeds indoors (spring) | Jan 7 – Feb 3 |
| Onions | Transplant outdoors (spring) | Mar 7 – Apr 5 |
| Broccoli | Start seeds indoors (spring) | Jan 31 – Mar 6 |
| Broccoli | Transplant outdoors (spring) | Mar 7 – Apr 5 |
| Broccoli | Start seeds indoors (fall) | Jul 7 – Jul 17 |
| Broccoli | Transplant outdoors (fall) | Aug 6 – Aug 17 |
| Cabbage | Start seeds indoors (spring) | Jan 21 – Feb 18 |
| Cabbage | Transplant outdoors (spring) | Feb 18 – Mar 21 |
| Cabbage | Start seeds indoors (fall) | Jun 27 – Jul 27 |
| Cabbage | Transplant outdoors (fall) | Jul 27 – Aug 27 |
| Leaf lettuce | Sow outdoors (spring) | Feb 18 – May 6 |
| Leaf lettuce | Sow outdoors (fall) | Jul 27 – Sep 12 |
| Spinach | Sow outdoors (spring) | Feb 11 – Mar 27 |
| Spinach | Sow outdoors (fall) | Aug 13 – Sep 17 |
| Radishes | Sow outdoors (spring) | Feb 18 – Apr 10 |
| Radishes | Sow outdoors (fall) | Jul 27 – Sep 27 |
| Kale | Sow outdoors (spring) | Mar 7 – Mar 27 |
| Kale | Sow outdoors (fall) | Jul 20 – Aug 27 |
| Carrots | Sow outdoors (spring) | Mar 21 – May 6 |
| Carrots | Sow outdoors (fall) | Jun 27 – Aug 12 |
| Garlic | Plant outdoors (fall) | Oct 27 – Nov 27 |
Where these dates come from
ZIP code 76943 is matched to the NOAA station Ozona, TX, 3.1 km away, at 2,345 ft elevation (50 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Ozona, TX (used) | 2,345 ft | Mar 21 | Nov 6 |
| Ozona 22Se, TX | 2,120 ft | Apr 1 | Nov 6 |
| Acton Rch, TX | 2,010 ft | Mar 27 | Nov 7 |
| Pandale 11 Ne, TX | 1,665 ft | Mar 10 | Nov 18 |
Frost dates near Ozona
- Barnhart, TX 76930 · last Mar 20, first Nov 14
- Sheffield, TX 79781 · last Mar 31, first Nov 3
- Sonora, TX 76950 · last Apr 1, first Nov 6
- Eldorado, TX 76936 · last Mar 22, first Nov 10
- Iraan, TX 79744 · last Mar 12, first Nov 16
- Mertzon, TX 76941 · last Apr 1, first Nov 4
- Big Lake, TX 76932 · last Apr 9, first Oct 31
- Knickerbocker, TX 76939 · last Mar 22, first Nov 10
Frequently asked questions
- When is the last frost in Ozona, TX?
- For ZIP code 76943, the average last spring frost (32°F) is March 21, based on NOAA 1991-2020 climate normals for the Ozona, TX weather station. There is a 1-in-10 chance of a frost after April 12.
- When is the first frost in Ozona, TX?
- The average first fall frost (32°F) is November 6. There is a 1-in-10 chance of frost by October 24, so tender plants are at risk from that point on.
- How long is the growing season in 76943?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 227 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.