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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Hazardous Weather Conditions

Current conditions at

Monticello Regional Airport (KMXO)

Lat: 42.22°NLon: 91.16°WElev: 827ft.

Fair

86°F

30°C

Humidity 70%
Wind Speed S 8 mph
Barometer 30.05 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 15 Aug 12:35 pm CDT
Extended Forecast for

Viola IA

Heat Advisory August 16, 12:00pm until August 16, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 89. South wind 5 to 10 mph.

    High: 89 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 72. Southwest wind around 5 mph becoming east in the evening. Chance of precipitation is 60%.

    Low: 72 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Saturday

    Saturday: A 10 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 93. Heat index values as high as 103. South wind 5 to 10 mph.

    High: 93 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 72. South wind around 5 mph.

    Low: 72 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 89. South wind 5 to 10 mph.
Tonight
Showers and thunderstorms likely before 1am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 72. Southwest wind around 5 mph becoming east in the evening. Chance of precipitation is 60%.
Saturday
A 10 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 93. Heat index values as high as 103. South wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 72. South wind around 5 mph.
Sunday
Sunny, with a high near 92.
Sunday Night
Partly cloudy, with a low around 71.
Monday
A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 91.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Viola IA
 42.1°N 91.39°W (Elev. 899 ft)
Last Update:
12:32 pm CDT Aug 15, 2025
Forecast Valid:
12pm CDT Aug 15, 2025-6pm CDT Aug 21, 2025
 
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