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Will it freeze in Round Rock in the next 7 nights?
No overnight lows at or below 32°F are forecast in Round Rock during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 54°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 54°F Above 36°F · Partly Cloudy
- Fri, Nov 6 53°F Above 36°F · Partly Cloudy
- Sat, Nov 7 51°F Above 36°F · Showers And Thunderstorms Likely
- Sun, Nov 8 48°F Above 36°F · Slight Chance Rain Showers
- Mon, Nov 9 48°F Above 36°F · Slight Chance Rain Showers
- Tue, Nov 10 50°F Above 36°F · Mostly Clear
- Wed, Nov 11 52°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 Round Rock
The median first fall hard-freeze date (28°F) is December 3, from NOAA’s 1991–2020 Climate Normals at Austin Great Hills. 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 | Mar 6 · Mar 25 · Apr 11 | Oct 27 · Nov 10 · Nov 27 | 231 days |
| 32°F freeze | Feb 22 · Mar 11 · Mar 29 | Nov 3 · Nov 20 · Dec 9 | 254 days |
| 28°F hard freeze | Jan 31 · Mar 1 · Mar 19 | Nov 12 · Dec 3 · Dec 29 | 278 days |
Average high temperature by month
1991–2020 normals at Austin Great Hills
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 Round Rock, TX come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Austin Great Hills (station USC00410433, elevation 880 ft), 9.9 mi from Round Rock. 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 Round Rock
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Pflugerville, TX | 6.8 mi | Mar 11 | Nov 20 |
| Hutto, TX | 7.5 mi | Mar 8 | Nov 21 |
| Cedar Park, TX | 9.3 mi | Mar 11 | Nov 20 |
| Georgetown, TX | 9.9 mi | Mar 6 | Nov 24 |
| Leander, TX | 12 mi | Mar 6 | Nov 24 |
| Manor, TX | 14 mi | Mar 4 | Nov 24 |
| Taylor, TX | 14 mi | Mar 8 | Nov 21 |
| Austin, TX | 17 mi | Feb 20 | Dec 3 |
| Liberty Hill, TX | 17 mi | Mar 6 | Nov 24 |
| Jarrell, TX | 20 mi | Mar 6 | Nov 24 |
Frequently asked questions
When is the last frost in Round Rock?
On average, the last spring frost (32°F) in Round Rock is around March 11. In about 1 year in 10 it comes after March 29, and in 9 years in 10 it comes after February 22.
When is the first frost in Round Rock?
The first fall frost (32°F) usually arrives around November 20. There’s a 10% chance of a freeze by November 3 and a 90% chance by December 9.
Can it frost in Round Rock 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 25.
What growing zone is Round Rock?
Round Rock 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 78664. See growing zones in Texas.
More: all Texas frost dates · Texas growing zones · UV index today in Round Rock · frost vs. freeze