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

90°F

32°C

Humidity 52%
Wind Speed NW 15 mph
Barometer 29.75 in (1005.7 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 27 Jul 2:53 pm CDT
Extended Forecast for

3 Miles W Sheffield IA

Heat Advisory July 27, 03:16pm until July 27, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 27, 03:16pm until July 27, 10:00pm

    NOW until 10:00pm Mon

    Heat Advisory

  • This Afternoon

    High: 95 °F

    Patchy Smoke

  • Tonight

    Tonight: Patchy smoke before 3am. Partly cloudy, with a low around 68. Northwest wind 5 to 8 mph becoming light and variable after midnight.

    Low: 68 °F

    Patchy Smoke

  • Tuesday

    Tuesday: Patchy smoke after 1pm. Mostly sunny, with a high near 85. Light east northeast wind.

    High: 85 °F

    Mostly Sunny
    then Patchy
    Smoke

  • Tuesday Night

    Tuesday Night: Patchy smoke. Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

This Afternoon
Patchy smoke. Mostly sunny, with a high near 95. Heat index values as high as 103. Northwest wind around 9 mph.
Tonight
Patchy smoke before 3am. Partly cloudy, with a low around 68. Northwest wind 5 to 8 mph becoming light and variable after midnight.
Tuesday
Patchy smoke after 1pm. Mostly sunny, with a high near 85. Light east northeast wind.
Tuesday Night
Patchy smoke. Partly cloudy, with a low around 64. Calm wind.
Wednesday
Sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Partly sunny, with a high near 86.
Thursday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 63.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 62.
Sunday
Sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Sheffield IA
 42.91°N 93.28°W
Last Update:
2:26 pm CDT Jul 27, 2026
Forecast Valid:
3pm CDT Jul 27, 2026-6pm CDT Aug 2, 2026
 
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