Round Rock, TX 78683 Weather

Williamson County9:35 PM CDT30.66°N, 97.60°W
Air Quality Alert until 7:00 PM Wed

Current conditions

Clear
70°
Clear
Feels like 70°
High 84° Wednesday·Low 52° tonight
WindCalm
Humidity38%
Dew point43°
Pressure30.20 inHg
Visibility10 mi
Cloud cover1%
UV index0 Low
Sunrise7:37 AM
Sunset6:55 PM

Observed at Georgetown, Georgetown Municipal Airport · 25 min ago

Forecast

10-day

  • Tonight

    Mostly clear, with a low around 52. Northeast wind 0 to 5 mph.

  • Wednesday

    Sunny, with a high near 84. North northeast wind 0 to 5 mph.

  • Wednesday Night

    Clear, with a low around 56. North northeast wind 0 to 5 mph.

National Weather Service forecast updated 2 hrs ago.

Hourly

Hourly forecast
  1. Now Clear 67°
  2. 10 PM Clear 64°
  3. 11 PM Clear 62°
  4. Wed12 AM Clear 61°
  5. 1 AM Mostly Clear 59°
  6. 2 AM Mostly Clear 58°
  7. 3 AM Mostly Clear 57°
  8. 4 AM Mostly Clear 54°
  9. 5 AM Mostly Clear 54°
  10. 6 AM Sunny 53°
  11. 7 AM Sunny 52°
  12. 8 AM Sunny 53°
  13. 9 AM Sunny 59°
  14. 10 AM Sunny 68°
  15. 11 AM Sunny 73°
  16. 12 PM Sunny 77°
  17. 1 PM Sunny 80°
  18. 2 PM Sunny 82°
  19. 3 PM Sunny 83°
  20. 4 PM Sunny 84°
  21. 5 PM Sunny 83°
  22. 6 PM Clear 82°
  23. 7 PM Clear 78°
  24. 8 PM Clear 71°

10-day forecast

Details
  1. TonightOct 20 Mostly Clear Mostly Clear52°
  2. WedOct 21 Sunny Sunny56°84°
  3. ThuOct 22 Sunny Sunny57°85°
  4. FriOct 23 Sunny Sunny57°85°
  5. SatOct 24 Sunny Sunny59°85°
  6. SunOct 25 Partly Sunny Partly Sunny56°82°
  7. MonOct 26 Mostly Sunny Mostly Sunny15%58°82°
  8. TueOct 27 Slight Chance Rain Showers Slight Chance Rain Showers15%77°
  9. WedOct 28 Sunny Sunny50°65°
  10. ThuOct 29 Sunny Sunny45°62°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news near Round Rock

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Air quality

49
Good
Ozone

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • TueModerate
  • WedUnhealthy for Sensitive Groups Action day
  • ThuUnhealthy for Sensitive Groups

Austin, TX reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:37 AM
Sunset 6:55 PM
Daylight 11 h 18 min (−1 min 46 s tomorrow)
Waxing Gibbous · 73% lit
Moonrise 3:45 PM Moonset 2:07 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low80° / 55°
Record high93° (2004)
Record low37° (1989)
Wettest2.60 in (1993)
Yesterday66° / 45°
Month to date2.33 in (normal 2.35 in)

Georgetown Lake, records since 1980. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in EWX, issued 3 hrs ago

Key Messages

Updated at 604 PM CDT Tue Oct 20 2026

- Warm and rain-free conditions persist through Saturday

- Low rain chances (20-30%) return early next week, mainly over the Rio Grande Plains and Southern Edwards Plateau

Discussion

A ridge over Mexico will be the main driver in our weather through this week, amplifying and elongating its axis over Texas through Saturday, leading to warm, rain-free, and mostly clear to partly cloudy conditions. High temperatures will generally stay in the 80s with low temperatures well into the 50s tonight, creeping back into the lower 60s by this weekend.

Shortwave disturbances from a mid-level low over the Four Corners region moving northeast will bring our next low rain chances (20- 30%) early next week, mainly over the Rio Grande Plains and Southern Edwards Plateau. We'll also see an increase in our cloud cover, reducing our high temperatures across South-Central Texas by a couple degrees.

Aviation

(00Z TAFS) Issued at 604 PM CDT Tue Oct 20 2026

VFR conditions are expected through the period. Light and variable wind persists overnight across all of South Central Texas, increasing only slightly in the afternoon from the northeast at I-35 terminals and from the southeast along the Rio Grande.

Preliminary Point Temps

Austin Camp Mabry 56 85 58 86 / 0 0 0 0 Austin Bergstrom Intl Airport 55 85 58 86 / 0 0 0 0 New Braunfels Muni Airport 56 84 59 85 / 0 0 0 0 Burnet Muni Airport 53 82 56 82 / 0 0 0 0 Del Rio Intl Airport 57 85 61 84 / 0 0 0 10 Georgetown Muni Airport 53 83 56 84 / 0 0 0 0 Hondo Muni Airport 55 86 60 85 / 0 0 0 10 San Marcos Muni Airport 54 85 58 86 / 0 0 0 0 La Grange - Fayette Regional 58 85 59 86 / 0 0 0 0 San Antonio Intl Airport 57 84 61 84 / 0 0 0 0 Stinson Muni Airport 59 85 63 85 / 0 0 0 0

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.