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

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

A Few Clouds

84°F

29°C

Humidity 74%
Wind Speed S 16 G 26 mph
Barometer 29.68 in (1003.7 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 20 Jun 5:53 pm CDT
Extended Forecast for

3 Miles NNE Rock Falls IA

Heat Advisory June 21, 12:00pm until June 22, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 75. Breezy, with a south wind 16 to 20 mph, with gusts as high as 31 mph.

    Low: 75 °F

    Mostly Clear
    and Breezy

  • Saturday

    Saturday: Sunny, with a high near 95. Heat index values as high as 106. Windy, with a south southwest wind 20 to 23 mph, with gusts as high as 34 mph.

    High: 95 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 29 mph.

    Low: 76 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny, with a high near 95. Heat index values as high as 102. Windy, with a south wind 17 to 23 mph, with gusts as high as 34 mph.

    High: 95 °F

    Sunny and
    Windy

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74. Windy, with a south wind 16 to 21 mph, with gusts as high as 31 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    Mostly Clear
    and Windy
    then Chance
    T-storms and
    Breezy

  • Monday

    Monday: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 88. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 80%.

    Low: 62 °F

    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.

    High: 77 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 64. Chance of precipitation is 90%.

    Low: 64 °F

    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 75. Breezy, with a south wind 16 to 20 mph, with gusts as high as 31 mph.
Saturday
Sunny, with a high near 95. Heat index values as high as 106. Windy, with a south southwest wind 20 to 23 mph, with gusts as high as 34 mph.
Saturday Night
Mostly clear, with a low around 76. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 29 mph.
Sunday
Sunny, with a high near 95. Heat index values as high as 102. Windy, with a south wind 17 to 23 mph, with gusts as high as 34 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74. Windy, with a south wind 16 to 21 mph, with gusts as high as 31 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 88. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 80%.
Tuesday
Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 64. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. High near 83. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 65. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Friday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Rock Falls IA
 43.23°N 93.07°W
Last Update:
4:41 pm CDT Jun 20, 2025
Forecast Valid:
6pm CDT Jun 20, 2025-6pm CDT Jun 27, 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