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Weather & Climate in Round Rock, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Round Rock has a warm climate with an average annual temperature of 71°F (21°C). Winters average 55°F in January while summers reach 89°F in July. The area gets 296 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 37.8 inches. Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 738 feet.
Temperature
55°F Jan (13°C)
89°F Jul (32°C)
| Annual Average | 70.5°F |
| 31% above US avg | |
| January Average | 55°F (13°C) |
| July Average | 89°F (32°C) |
| Sunny Days | 296 days/yr |
Geography
| Elevation | 738 ft (225 m) |
| Area | 34.4 sq mi (89.1 km²) |
| Population Density | 3,259/sq mi |
| Coordinates | 30.5268°N, 97.6601°W |
| Timezone | America/Chicago |
| County | Williamson County County |
| Nearest Airport | Austin-Bergstrom International (AUS) 23 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 90.1 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 87.9 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
24 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.4.
| Apr 10, 2021 | 10 km SSE of Smiley, Texas | M3.4 | 150 km | 5 km |
| Feb 7, 2021 | 8 km ESE of Smiley, Texas | M3.2 | 144 km | 6 km |
| May 14, 2019 | 1 km SSE of Smiley, Texas | M3.1 | 141 km | 5 km |
| Feb 19, 2015 | 3 km N of Hallettsville, Texas | M3.1 | 136 km | 5 km |
| Jan 1, 2024 | 18 km S of Gonzales, Texas | M3.0 | 134 km | 3 km |
| Feb 3, 2019 | 13 km ESE of Smiley, Texas | M3.0 | 146 km | 5 km |
| May 17, 2019 | 12 km ESE of Smiley, Texas | M2.9 | 145 km | 7 km |
| Oct 20, 2017 | 5 km W of Flatonia, Texas | M2.9 | 106 km | 3 km |
| Sep 3, 2015 | 7 km NNE of Leander, Texas | M2.9 | 21 km | 5 km |
| Aug 19, 2022 | 11 km E of Smiley, Texas | M2.9 | 140 km | 7 km |
| Jun 16, 2022 | 17 km E of Smiley, Texas | M2.8 | 140 km | 7 km |
| Apr 8, 2021 | 9 km SSE of Smiley, Texas | M2.8 | 149 km | 8 km |
| Jan 4, 1995 | 1 km NW of Hallettsville, Texas | M2.7 | 138 km | 5 km |
| Jul 22, 2023 | 13 km ENE of Smiley, Texas | M2.6 | 138 km | 7 km |
| Aug 24, 2021 | 3 km NNW of Hallettsville, Texas | M2.6 | 136 km | 5 km |
| May 15, 2019 | 10 km SE of Smiley, Texas | M2.5 | 148 km | 5 km |
| May 15, 2019 | 12 km ESE of Smiley, Texas | M2.5 | 145 km | 7 km |
| May 5, 2019 | 14 km ESE of Smiley, Texas | M2.5 | 145 km | 7 km |
| Apr 2, 2024 | 4 km SSW of Round Top, Texas | M2.5 | 107 km | 17 km |
| May 19, 2019 | 7 km ESE of Smiley, Texas | M2.5 | 143 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
7 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Beryl | Category 1 | 92 mph | 210 km |
| 2021 | Nicholas | Category 1 | 75 mph | 270 km |
| 2017 | Harvey | Category 4 | 132 mph | 206 km |
| 2008 | Ike | Category 2 | 109 mph | 232 km |
| 2003 | Claudette | Category 1 | 92 mph | 227 km |
| 1989 | Jerry | Category 1 | 86 mph | 296 km |
| 1983 | Alicia | Category 3 | 115 mph | 227 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
448 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 38 fatalities, 317 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 27, 1997 | EF5 | 33 km | 5.1 mi | 27 |
| May 27, 1997 | EF4 | 39 km | 5.6 mi | 1 |
| Apr 12, 2022 | EF3 | 42 km | 16.6 mi | 0 |
| Apr 13, 2019 | EF3 | 100 km | 32.5 mi | 0 |
| Mar 10, 2000 | EF3 | 95 km | 21.0 mi | 0 |
| May 27, 1997 | EF3 | 94 km | 3.7 mi | 0 |
| May 27, 1997 | EF3 | 16 km | 9.2 mi | 0 |
| May 27, 1997 | EF3 | 74 km | 1.4 mi | 0 |
| May 13, 1994 | EF3 | 59 km | 3.5 mi | 0 |
| Mar 14, 1990 | EF3 | 62 km | 9.0 mi | 0 |
| May 17, 1989 | EF3 | 27 km | 3.0 mi | 1 |
| Apr 7, 1980 | EF3 | 4 km | 31.7 mi | 1 |
| May 26, 1976 | EF3 | 68 km | 2.0 mi | 2 |
| Mar 10, 1973 | EF3 | 59 km | 7.8 mi | 0 |
| May 10, 1959 | EF3 | 28 km | 11.0 mi | 0 |
| Apr 24, 1957 | EF3 | 40 km | 14.7 mi | 0 |
| Mar 20, 1957 | EF3 | 75 km | 16.9 mi | 0 |
| Mar 20, 1957 | EF3 | 85 km | 7.2 mi | 0 |
| Apr 30, 1954 | EF3 | 23 km | 139.9 mi | 0 |
| Dec 2, 1953 | EF3 | 66 km | 3.3 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: BASTROP COUNTY COMPLEX (31,838 acres, 2011).
| Year | Name | Acres Burned | Distance |
| 2011 | BASTROP COUNTY COMPLEX | 31,838 | 60 km |
| 2022 | CRITTENBERG COMPLEX | 21,391 | 83 km |
| 2011 | ROBINETTE | 6,039 | 79 km |
| 2011 | UNNAMED | 5,706 | 78 km |
| 2011 | DELHI | 4,735 | 83 km |
| 2011 | SPICEWOOD | 4,239 | 45 km |
| 2015 | HIDDEN PINES | 3,807 | 68 km |
| 1984 | STEWAIT | 3,696 | 74 km |
| 2018 | HARMAN ROAD | 3,094 | 95 km |
| 2009 | OWL CREEK | 2,376 | 86 km |
| 2011 | UNNAMED | 2,236 | 74 km |
| 2002 | UNNAMED | 2,234 | 58 km |
| 2011 | LUTHERHILL | 2,215 | 100 km |
| 2006 | BROWNS CREEK RANGE | 1,889 | 85 km |
| 2000 | CHEROKEE FIRE | 1,597 | 98 km |
| 2011 | UNNAMED | 1,581 | 75 km |
| 2008 | BERTRAM | 1,567 | 42 km |
| 2008 | HWY 195 FIRE | 1,523 | 31 km |
| 2022 | BUDDY | 1,521 | 87 km |
| 2008 | CR 208 | 1,483 | 61 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 55°F (13°C) | 2.0 in | |
| February | 53°F (11°C) | 2.4 in | |
| March | 60°F (15°C) | 2.1 in | |
| April | 67°F (19°C) | 2.9 in | |
| May | 74°F (23°C) | 4.5 in | Wettest |
| June | 80°F (27°C) | 3.6 in | |
| July | 89°F (32°C) | 1.8 in | Warmest, Driest |
| August | 84°F (29°C) | 2.0 in | |
| September | 78°F (26°C) | 3.9 in | |
| October | 69°F (21°C) | 3.5 in | |
| November | 58°F (15°C) | 2.7 in | |
| December | 50°F (10°C) | 2.1 in | Coldest |
Round Rock has a seasonal temperature swing of 38°F / from 50°F in December to 89°F in July. Total annual precipitation is 33.6 inches, with May being the wettest month (4.5") and July the driest (1.8").