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

McAllen, Miller International Airport (KMFE)

Lat: 26.18°NLon: 98.24°WElev: 105ft.

81°F

27°C

Humidity 85%
Wind Speed SE 7 mph
Barometer 29.93 in (1013.3 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 Aug 2:53 am CDT
Extended Forecast for

San Juan TX

  • Overnight

    Overnight: Mostly clear, with a low around 78. South southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Heat index values as high as 108. Light east southeast wind becoming east 5 to 10 mph in the morning.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. East wind 6 to 11 mph becoming light south southeast after midnight. Winds could gust as high as 21 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 99. Calm wind becoming east 5 to 8 mph in the afternoon.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. East wind 5 to 10 mph becoming light and variable after midnight.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Sunny, with a high near 98. Calm wind becoming east northeast 5 to 8 mph in the afternoon. Chance of precipitation is 40%.

    High: 98 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly clear, with a low around 77. East wind 5 to 9 mph becoming calm after midnight.

    Low: 77 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 99. Calm wind becoming east 5 to 7 mph in the afternoon.

    High: 99 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. East wind 5 to 9 mph becoming calm after midnight.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Monday
Sunny and hot, with a high near 100. Heat index values as high as 108. Light east southeast wind becoming east 5 to 10 mph in the morning.
Monday Night
Mostly clear, with a low around 77. East wind 6 to 11 mph becoming light south southeast after midnight. Winds could gust as high as 21 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 99. Calm wind becoming east 5 to 8 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 77. East wind 5 to 10 mph becoming light and variable after midnight.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Sunny, with a high near 98. Calm wind becoming east northeast 5 to 8 mph in the afternoon. Chance of precipitation is 40%.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly clear, with a low around 77. East wind 5 to 9 mph becoming calm after midnight.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 99. Calm wind becoming east 5 to 7 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 77. East wind 5 to 9 mph becoming calm after midnight.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 98. Calm wind becoming east 5 to 7 mph in the afternoon.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 78. East wind 5 to 10 mph becoming light south southeast after midnight.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
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ABOUT THIS FORECAST

 
Point Forecast:
San Juan TX
 26.18°N 98.16°W
Last Update:
3:30 am CDT Aug 18, 2025
Forecast Valid:
3am CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
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Additional Resources

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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