Checking current alerts… View NWS forecast and alerts.
Will it freeze in Helotes in the next 7 nights?
No overnight lows at or below 32°F are forecast in Helotes during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 55°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 55°F Above 36°F · Partly Cloudy
- Fri, Nov 6 55°F Above 36°F · Partly Cloudy
- Sat, Nov 7 53°F Above 36°F · Showers And Thunderstorms Likely
- Sun, Nov 8 50°F Above 36°F · Chance Rain Showers
- Mon, Nov 9 50°F Above 36°F · Slight Chance Rain Showers then Partly Cloudy
- Tue, Nov 10 52°F Above 36°F · Partly Cloudy
- Wed, Nov 11 54°F Above 36°F · Partly Cloudy
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Helotes
The median first fall hard-freeze date (28°F) is December 29, from NOAA’s 1991–2020 Climate Normals at San Antonio/seaworld. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Feb 11 · Mar 4 · Mar 31 | Nov 5 · Nov 25 · Dec 15 | 264 days |
| 32°F freeze | Jan 18 · Feb 18 · Mar 16 | Nov 17 · Dec 9 · Jan 13 | 296 days |
| 28°F hard freeze | Dec 17 · Jan 31 · Mar 3 | Nov 28 · Dec 29 · Feb 9 | 334 days |
Average high temperature by month
1991–2020 normals at San Antonio/seaworld
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Helotes, TX come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: San Antonio/seaworld (station USC00418169, elevation 940 ft), 8.9 mi from Helotes. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Helotes
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Leon Valley, TX | 6.8 mi | Feb 18 | Dec 9 |
| Fair Oaks Ranch, TX | 12 mi | Mar 15 | Nov 13 |
| San Antonio, TX | 12 mi | Feb 25 | Nov 28 |
| Alamo Heights, TX | 14 mi | Feb 25 | Nov 28 |
| Boerne, TX | 14 mi | Mar 15 | Nov 13 |
| Terrell Hills, TX | 16 mi | Feb 25 | Nov 28 |
| Windcrest, TX | 19 mi | Feb 25 | Nov 28 |
| Kirby, TX | 19 mi | Feb 25 | Nov 28 |
| Bulverde, TX | 20 mi | Mar 1 | Dec 1 |
| Live Oak, TX | 21 mi | Feb 21 | Dec 5 |
Frequently asked questions
When is the last frost in Helotes?
On average, the last spring frost (32°F) in Helotes is around February 18. In about 1 year in 10 it comes after March 16, and in 9 years in 10 it comes after January 18.
When is the first frost in Helotes?
The first fall frost (32°F) usually arrives around December 9. There’s a 10% chance of a freeze by November 17 and a 90% chance by January 13.
Can it frost in Helotes after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after March 4.
What growing zone is Helotes?
Helotes is in USDA Plant Hardiness Zone 9a (average annual extreme minimum temperature 20 to 25°F), based on the 2023 USDA map for ZIP code 78249. See growing zones in Texas.
More: all Texas frost dates · Texas growing zones · frost vs. freeze