Frost dates for ZIP 78657 (Horseshoe Bay, TX)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Johnson City 2N, TX (16 miles away).
- Average last spring frostMar 2250% chance of a 32°F freeze after this date
- Average first fall frostNov 950% chance of a 32°F freeze by this date
- Growing season (frost-free)235 daysmedian, 32°F threshold
- USDA hardiness zone8b15 to 20°F avg. coldest night
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Feb 27 |
| 50% (the "average" last frost) | Mar 22 |
| 10% (safe-side: only 1 year in 10 freezes later) | Apr 11 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Oct 25 |
| 50% (the "average" first frost) | Nov 9 |
| 90% (late: most years have frozen by now) | Nov 30 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 4 | Nov 1 |
| 32°F (freeze) | Mar 22 | Nov 9 |
| 28°F (hard freeze) | Mar 6 | Nov 22 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
This week in Horseshoe Bay
Soil temperature now
2-inch depth
69°F 55°F or warmer
24-hour average · latest 71°F, as of Oct 17, 7:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Austin 33 NW (19 mi), Altwein Rd (28 mi), Blanco Middle School (30 mi).
4-inch depth
72°F 55°F or warmer
24-hour average · latest 73°F, as of Oct 17, 7:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Austin 33 NW (19 mi), Altwein Rd (28 mi), Blanco Middle School (30 mi).
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
No frost in the 7-day forecast.
| Period | High | Low | Forecast |
|---|---|---|---|
| Tonight | 43° | Mostly Clear | |
| Sunday | 72° | 47° | Sunny |
| Monday | 76° | 53° | Mostly Sunny |
| Tuesday | 81° | 55° | Sunny |
| Wednesday | 84° | 57° | Sunny |
| Thursday | 86° | 58° | Sunny |
| Friday | 86° | 60° | Mostly Sunny |
National Weather Service forecast, issued Oct 17, 6:53 PM CDT. Frost can form above 32°F on clear, calm nights. Full NWS forecast.
Free frost alerts for 78657
An email when the National Weather Service forecasts a freeze for this ZIP, plus the spring soil-temperature heads-up. At most a few a month.
Alerts open soon. This form is a preview and doesn't send anything yet.
Where these numbers come from
Station: Johnson City 2N, TX (NOAA GHCN-Daily ID USC00414605), elevation 1,137 ft, 16.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Burnet Muni AP, TX | 17 mi | Mar 6 | Nov 23 |
| Burnet, TX | 18 mi | Mar 15 | Nov 11 |
| Austin 33 NW, TX | 19 mi | Mar 2 | Nov 29 |
The average last-frost dates of these stations span 20 days, a rough guide to local variation. See data sources & methods.
Questions
When is the last frost in 78657?
The average (50% chance) last spring freeze of 32°F for ZIP 78657 is March 22. For a safer planting date, use April 11, when only 1 year in 10 still sees a later freeze.
When is the first frost in 78657?
The average first fall freeze is November 9. In 1 year in 10 it comes by October 25.
What hardiness zone is 78657?
ZIP 78657 is in USDA zone 8b (15 to 20°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
Other ZIP codes in Llano County
76831 76885 78607 78609 78639 78643 78672 All Llano County ZIPs