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.

Fair

74°F

23°C

Humidity 69%
Wind Speed S 7 mph
Barometer 29.88 in (1010.5 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 19 Jun 8:53 pm CDT
Extended Forecast for

Rock Falls IA

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

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 66. South wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Mostly Clear
    then T-storms

  • Friday

    Friday: Showers and thunderstorms, mainly before 9am. High near 91. Heat index values as high as 101. Breezy, with a south wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Breezy.
    T-storms then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. Windy, with a south wind 16 to 21 mph, with gusts as high as 32 mph.

    Low: 75 °F

    Mostly Clear
    and Windy

  • Saturday

    Saturday: Sunny, with a high near 95. Heat index values as high as 105. Windy, with a south southwest wind 20 to 23 mph, with gusts as high as 33 mph.

    High: 95 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Breezy, with a south southwest wind 18 to 20 mph, with gusts as high as 30 mph.

    Low: 76 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny, with a high near 94. Windy.

    High: 94 °F

    Sunny and
    Windy

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 72. Breezy.

    Low: 72 °F

    Chance
    T-storms and
    Breezy

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 87. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 90%.

    Low: 62 °F

    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 66. South wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers and thunderstorms, mainly before 9am. High near 91. Heat index values as high as 101. Breezy, with a south wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Mostly clear, with a low around 75. Windy, with a south wind 16 to 21 mph, with gusts as high as 32 mph.
Saturday
Sunny, with a high near 95. Heat index values as high as 105. Windy, with a south southwest wind 20 to 23 mph, with gusts as high as 33 mph.
Saturday Night
Mostly clear, with a low around 76. Breezy, with a south southwest wind 18 to 20 mph, with gusts as high as 30 mph.
Sunday
Sunny, with a high near 94. Windy.
Sunday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 72. Breezy.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 87. Chance of precipitation is 70%.
Monday Night
Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 90%.
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 82. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 65. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 79. Chance of precipitation is 60%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rock Falls IA
 43.21°N 93.1°W
Last Update:
9:23 pm CDT Jun 19, 2025
Forecast Valid:
9pm CDT Jun 19, 2025-6pm CDT Jun 26, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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