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

Southwest Monsoon Flooding

Monsoonal conditions in the Southwest will lead to threats of flash flooding through the weekend. Severe thunderstorms will be possible through Friday night in the northern tier of the country and Saturday afternoon in the vicinity of the Southern Great Lakes. Warm conditions have prompted Heat Advisories for portions of the Midwest and ArkLaMiss this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Sioux County Regional Airport (KSXK)

Lat: 42.99°NLon: 96.16°WElev: 1409ft.

Mostly Cloudy

77°F

25°C

Humidity 100%
Wind Speed S 10 mph
Barometer 29.89 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 24 Jul 12:55 am CDT
Extended Forecast for

Alton IA

  • Overnight

    Overnight: A slight chance of showers, with thunderstorms also possible after 2am. Mostly cloudy, with a low around 70. South southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    Slight Chance
    T-storms

    Low: 70 °F

  • Saturday

    Saturday: Sunny, with a high near 93. Southwest wind 5 to 10 mph becoming north in the afternoon.

    Sunny

    High: 93 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 62. North wind around 5 mph becoming calm in the evening.

    Partly Cloudy

    Low: 62 °F

  • Sunday

    Sunday: Mostly sunny, with a high near 92. Calm wind becoming south southwest around 5 mph in the morning.

    Mostly Sunny

    High: 92 °F

  • Sunday
    Night

    Sunday Night: A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. South wind around 5 mph. Chance of precipitation is 20%.

    Partly Cloudy
    then Slight
    Chance
    T-storms

    Low: 66 °F

  • Monday

    Monday: Sunny, with a high near 92. South wind 5 to 10 mph.

    Sunny

    High: 92 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 68.

    Mostly Clear

    Low: 68 °F

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97.

    Hot

    High: 97 °F

  • Tuesday
    Night

    Tuesday Night: Mostly clear, with a low around 71.

    Mostly Clear

    Low: 71 °F

Detailed Forecast

Overnight
A slight chance of showers, with thunderstorms also possible after 2am. Mostly cloudy, with a low around 70. South southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 93. Southwest wind 5 to 10 mph becoming north in the afternoon.
Saturday Night
Partly cloudy, with a low around 62. North wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 92. Calm wind becoming south southwest around 5 mph in the morning.
Sunday Night
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. South wind around 5 mph. Chance of precipitation is 20%.
Monday
Sunny, with a high near 92. South wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 71.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 87.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Alton IA
 42.99°N 96.01°W (Elev. 1299 ft)
Last Update:
10:44 pm CDT Jul 23, 2021
Forecast Valid:
1am CDT Jul 24, 2021-6pm CDT Jul 30, 2021
 
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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