National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

Mostly Cloudy

84°F

29°C

Humidity 79%
Wind Speed S 7 mph
Barometer 29.98 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 12 Jun 8:52 am CDT
Extended Forecast for

Lewisville TX

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly before 4pm. Partly sunny, with a high near 92. Heat index values as high as 101. South southwest wind around 5 mph becoming east northeast in the afternoon.

    High: 92 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 79. Southeast wind 5 to 10 mph.

    Low: 79 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 96. Heat index values as high as 104. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 96 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 78. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 78 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 90. South wind 5 to 10 mph becoming northeast in the afternoon. Chance of precipitation is 70%.

    High: 90 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 70. North wind 5 to 10 mph. Chance of precipitation is 80%.

    Low: 70 °F

    Showers

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 82. North northeast wind around 10 mph.

    High: 82 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Northeast wind 5 to 10 mph becoming light in the evening.

    Low: 68 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 88. Northeast wind around 5 mph becoming southeast in the afternoon.

    High: 88 °F

    Slight Chance
    Showers

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly before 4pm. Partly sunny, with a high near 92. Heat index values as high as 101. South southwest wind around 5 mph becoming east northeast in the afternoon.
Tonight
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 79. Southeast wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 96. Heat index values as high as 104. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 78. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 90. South wind 5 to 10 mph becoming northeast in the afternoon. Chance of precipitation is 70%.
Sunday Night
Showers and possibly a thunderstorm. Low around 70. North wind 5 to 10 mph. Chance of precipitation is 80%.
Monday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 82. North northeast wind around 10 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Northeast wind 5 to 10 mph becoming light in the evening.
Tuesday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 88. Northeast wind around 5 mph becoming southeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Mostly sunny and hot, with a high near 100.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisville TX
 33.05°N 97°W (Elev. 531 ft)
Last Update:
6:06 am CDT Jun 12, 2026
Forecast Valid:
9am CDT Jun 12, 2026-6pm CDT Jun 18, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation