Frost dates for 78605Bertram, TX
The average last spring frost in Bertram is March 15 and the average first fall frost is November 11, giving a typical growing season of about 243 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 15
- Average first fall frost
- Nov 11
- Growing season
- 243 days
Safer after Apr 6 (1-in-10 risk)
Possible by Oct 28 (1-in-10 risk)
First frost typically in 15 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 8 · Mar 31 · Apr 18 | Oct 21 · Nov 3 · Nov 18 | 215 days | 100% |
| Frost / freeze (32°F) | Feb 25 · Mar 15 · Apr 6 | Oct 28 · Nov 11 · Dec 2 | 243 days | 100% |
| Hard freeze (28°F) | Feb 6 · Mar 2 · Mar 19 | Nov 4 · Nov 25 · Dec 16 | 268 days | 100% |
Planting calendar for Bertram
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 12 – Apr 20 |
| Tomatoes | Transplant outdoors | Mar 31 – Jul 22 |
| Peppers | Start seeds indoors | Feb 12 – Mar 15 |
| Peppers | Transplant outdoors | Apr 14 – May 15 |
| Eggplant | Start seeds indoors | Mar 1 – Mar 30 |
| Eggplant | Transplant outdoors | Apr 14 – May 15 |
| Cucumbers | Sow outdoors | Apr 14 – Aug 1 |
| Summer squash | Sow outdoors | Mar 31 – May 15 |
| Winter squash & pumpkins | Sow outdoors | Apr 14 – May 15 |
| Snap beans | Sow outdoors | Mar 31 – Aug 24 |
| Sweet corn | Sow outdoors | Mar 31 – Jul 22 |
| Watermelon & cantaloupe | Sow outdoors | Apr 14 – May 15 |
| Okra | Sow outdoors | Apr 7 – Apr 30 |
| Peas | Sow outdoors (spring) | Feb 12 – Mar 30 |
| Potatoes | Plant outdoors (spring) | Feb 12 – Apr 14 |
| Onions | Start seeds indoors (spring) | Jan 1 – Jan 28 |
| Onions | Transplant outdoors (spring) | Mar 1 – Mar 30 |
| Broccoli | Start seeds indoors (spring) | Jan 25 – Feb 28 |
| Broccoli | Transplant outdoors (spring) | Mar 1 – Mar 30 |
| Broccoli | Start seeds indoors (fall) | Jul 12 – Jul 22 |
| Broccoli | Transplant outdoors (fall) | Aug 11 – Aug 22 |
| Cabbage | Start seeds indoors (spring) | Jan 15 – Feb 12 |
| Cabbage | Transplant outdoors (spring) | Feb 12 – Mar 15 |
| Cabbage | Start seeds indoors (fall) | Jul 2 – Aug 1 |
| Cabbage | Transplant outdoors (fall) | Aug 1 – Sep 1 |
| Leaf lettuce | Sow outdoors (spring) | Feb 12 – Apr 30 |
| Leaf lettuce | Sow outdoors (fall) | Aug 1 – Sep 17 |
| Spinach | Sow outdoors (spring) | Feb 5 – Mar 21 |
| Spinach | Sow outdoors (fall) | Aug 18 – Sep 22 |
| Radishes | Sow outdoors (spring) | Feb 12 – Apr 4 |
| Radishes | Sow outdoors (fall) | Aug 1 – Oct 2 |
| Kale | Sow outdoors (spring) | Mar 1 – Mar 21 |
| Kale | Sow outdoors (fall) | Jul 25 – Sep 1 |
| Carrots | Sow outdoors (spring) | Mar 15 – Apr 30 |
| Carrots | Sow outdoors (fall) | Jul 2 – Aug 17 |
| Garlic | Plant outdoors (fall) | Nov 1 – Dec 2 |
Where these dates come from
ZIP code 78605 is matched to the NOAA station Burnet, TX, 17.4 km away, at 1,285 ft elevation (25 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Burnet, TX (used) | 1,285 ft | Mar 15 | Nov 11 |
| Austin 33 Nw, TX | 1,361 ft | Mar 2 | Nov 29 |
| Burnet Muni Ap, TX | 1,288 ft | Mar 6 | Nov 23 |
| Georgetown Lake, TX | 874 ft | Mar 6 | Nov 24 |
Frost dates near Bertram
- Liberty Hill, TX 78642 · last Mar 6, first Nov 24
- Burnet, TX 78611 · last Mar 15, first Nov 11
- Briggs, TX 78608 · last Mar 22, first Nov 12
- Leander, TX 78641 · last Mar 6, first Nov 24
- Florence, TX 76527 · last Mar 6, first Nov 24
- Marble Falls, TX 78654 · last Mar 6, first Nov 23
- Georgetown, TX 78633 · last Mar 6, first Nov 24
- Cedar Park, TX 78613 · last Mar 6, first Nov 24
Frequently asked questions
- When is the last frost in Bertram, TX?
- For ZIP code 78605, the average last spring frost (32°F) is March 15, based on NOAA 1991-2020 climate normals for the Burnet, TX weather station. There is a 1-in-10 chance of a frost after April 6.
- When is the first frost in Bertram, TX?
- The average first fall frost (32°F) is November 11. There is a 1-in-10 chance of frost by October 28, so tender plants are at risk from that point on.
- How long is the growing season in 78605?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 243 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.