Round Rock, TX 78680 Weather

Williamson County5:55 PM CDT30.66°N, 97.60°W
Air Quality Alert until 7:00 PM Wed

Current conditions

Sunny
84°
Sunny
Feels like 84°
High 84°·Low 55°
WindE 3 mph
Humidity26%
Dew point45°
Pressure30.14 inHg
Visibility10 mi
Cloud cover2%
UV index1 Low
Sunrise7:38 AM
Sunset6:54 PM

Observed at Georgetown, Georgetown Municipal Airport · 25 min ago

Forecast

10-day

  • This Afternoon

    Sunny, with a high near 84. East northeast wind around 5 mph.

  • Tonight

    Mostly clear, with a low around 55. Northeast wind 0 to 5 mph.

  • Thursday

    Sunny, with a high near 86. Northeast wind 0 to 5 mph.

National Weather Service forecast updated 23 min ago.

Hourly

Hourly forecast
  1. Now Sunny 83°
  2. 6 PM Clear 81°
  3. 7 PM Clear 77°
  4. 8 PM Clear 70°
  5. 9 PM Clear 68°
  6. 10 PM Clear 65°
  7. 11 PM Mostly Clear 64°
  8. Thu12 AM Clear 62°
  9. 1 AM Mostly Clear 61°
  10. 2 AM Mostly Clear 59°
  11. 3 AM Mostly Clear 58°
  12. 4 AM Mostly Clear 57°
  13. 5 AM Mostly Clear 56°
  14. 6 AM Sunny 55°
  15. 7 AM Sunny 55°
  16. 8 AM Sunny 55°
  17. 9 AM Sunny 60°
  18. 10 AM Sunny 69°
  19. 11 AM Sunny 75°
  20. 12 PM Sunny 79°
  21. 1 PM Sunny 81°
  22. 2 PM Sunny 83°
  23. 3 PM Mostly Sunny 84°
  24. 4 PM Sunny 85°

10-day forecast

Details
  1. TodayOct 21 Sunny Sunny55°84°
  2. ThuOct 22 Sunny Sunny56°86°
  3. FriOct 23 Sunny Sunny57°85°
  4. SatOct 24 Mostly Sunny Mostly Sunny59°85°
  5. SunOct 25 Partly Sunny Partly Sunny55°82°
  6. MonOct 26 Partly Sunny Partly Sunny10%58°82°
  7. TueOct 27 Slight Chance Rain Showers Slight Chance Rain Showers22%56°79°
  8. WedOct 28 Cloudy Cloudy65°82°
  9. ThuOct 29 Showers Showers0.15 in64°83°
  10. FriOct 30 Heavy rain Heavy rain0.24 in66°73°

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

Radar

Full map
Open the National Weather Service radar (the map here needs JavaScript).

Weather news near Round Rock

More weather news

Air quality

74
Moderate
Ozone

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • WedUnhealthy for Sensitive Groups Action day
  • ThuModerate
  • FriModerate

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 7:38 AM
Sunset 6:54 PM
Daylight 11 h 16 min (−1 min 45 s tomorrow)
Waxing Gibbous · 80% lit
Moonrise 4:14 PM Moonset 3:05 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low80° / 55°
Record high93° (2025)
Record low42° (1989)
Wettest3.50 in (1984)
Yesterday71° / 49°
Month to date2.33 in (normal 2.50 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 5 hrs ago

Key Messages

Updated at 1215 PM CDT Wed Oct 21 2026

- Warm and rain-free conditions to persist into the weekend

- Modest Rain chances (15-30%) to return early next week

Short Term

(Tonight through Thursday night) Issued at 1215 PM CDT Wed Oct 21 2026

A mid level ridge axis that has been responsible for our continued dry and warm weather will not move much in the coming days. This ridge will eventually set up a strong Omega block pattern across the CONUS. This will continue to keep our area under mostly sunny to partly sunny skies with highs in the low to mid 80s and lows in the low to mid 50s each day in the short term. Chances of precipitation look slim to non nonexistent with the one exception being over the Rio Grande Plains. A decent amount of moisture may advance far enough northward into our area that may produce also a sprinkle or shower over the Rio Grande. Otherwise expect dry weather to persist areawide.

Long Term

(Friday through next Wednesday) Issued at 1215 PM CDT Wed Oct 21 2026

The omega block pattern remains through the end of the week before eventually showing signs of breaking down as a decent trough tries to dislodge it over the southwestern CONUS. As this happens we should have a few more days of warm and dry weather (highs in the 80s lows in the 50s) before we get into low chances for precip as moisture and humidity return on the back of southeasterly flow. This should allow temperatures to cool slightly as this trough begins to eject northeastward into the panhandles and thus possibly bringing with it a front southward into our area. Long range models are still having quite a difficult time handling this feature and the ensuing pattern change. For now have kept pops low, in the 15-30% range, starting Sunday and continuing into early next week. Continue to stay tuned as details become more refined as we get closer to the weekend.

Aviation

(18Z TAFS) Issued at 1208 PM CDT Wed Oct 21 2026

Winds have been rather light so far this morning, and should remain less than 10 kts at all sites through the period. A slight shift to more east-northeasterly winds is expected at AUS, SAT, and SSF shortly if it hasn't occurred yet. Light winds, and even calm at times are expected shortly after sunset this evening at AUS, SAT, and SSF followed by a switch to more easterly winds by late Thursday morning. Return flow is expected by Friday which may bring low clouds and MVFR ceilings back into the picture just beyond this forecast. Meanwhile, at DRT, MVFR stratus may briefly develop tomorrow morning after sunrise and persist through mid to late morning before lifting to VFR and ESE winds at around 10 kts.

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.