Iowa · NWS DMX office

Mason City, IA weather

It is 55°F and cloudy at Mason City Municipal Airport as of Oct 28, 7:00 AM CDT. Today: Slight Chance Rain Showers then Chance Showers And Thunderstorms, high near 74°F, 35% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 5:37 AM CDT.

Updated Oct 28, 7:28 AM CDT (snapshot)

Current conditions

Temperature

55°F

Cloudy

Wind

SSE 10 mph

Humidity 88% · dew point 52°F

Pressure · visibility

30.04 inHg

Visibility 10 mi

Observed at Mason City Municipal Airport (KMCW), Oct 28, 7:00 AM CDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Mason City forecast zone right now.

Around the NWS DMX forecast area

No active alerts in zones served by the DMX office near Mason City.

From the alert snapshot of Oct 28, 2026, 8:14 AM EDT. No alerts are active anywhere in Iowa.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Mason City (local time)
TimeTempForecastPrecip. chanceWind
Wed 7 AM54°FSlight Chance Rain Showers17%SSE 5 mph
Wed 8 AM54°FSlight Chance Rain Showers16%SSE 6 mph
Wed 9 AM57°FSlight Chance Rain Showers16%SSE 8 mph
Wed 10 AM61°FSlight Chance Rain Showers16%SSE 8 mph
Wed 11 AM65°FSlight Chance Rain Showers21%SSE 10 mph
Wed 12 PM68°FMostly Sunny6%S 12 mph
Wed 1 PM70°FSlight Chance Rain Showers19%S 13 mph
Wed 2 PM72°FSlight Chance Rain Showers16%S 14 mph
Wed 3 PM73°FMostly Sunny14%S 15 mph
Wed 4 PM73°FSunny12%S 14 mph
Wed 5 PM73°FChance Showers And Thunderstorms35%S 13 mph
Wed 6 PM71°FChance Showers And Thunderstorms47%S 12 mph
Wed 7 PM69°FShowers And Thunderstorms Likely73%S 9 mph
Wed 8 PM66°FShowers And Thunderstorms75%S 9 mph
Wed 9 PM62°FShowers And Thunderstorms81%SSW 8 mph
Wed 10 PM61°FShowers And Thunderstorms76%SW 7 mph
Wed 11 PM60°FChance Showers And Thunderstorms45%W 7 mph
Thu 12 AM59°FMostly Cloudy6%W 6 mph
Thu 1 AM59°FMostly Cloudy4%NW 5 mph
Thu 2 AM57°FPartly Cloudy3%NW 6 mph
Thu 3 AM55°FMostly Cloudy0%NNW 7 mph
Thu 4 AM53°FMostly Cloudy0%NNW 7 mph
Thu 5 AM50°FPartly Cloudy0%NNW 7 mph
Thu 6 AM48°FPartly Sunny0%NNW 6 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Mason City can differ.

7-day forecast

Today

High 74°F·Low 46°F

A slight chance of rain showers before 3pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 74. South southeast wind 6 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Tonight: A chance of showers and thunderstorms before 7pm, then showers and thunderstorms between 7pm and midnight. Mostly cloudy. Low around 46, with temperatures rising to around 50 overnight. West southwest wind 5 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.

Thursday

High 64°F·Low 38°F

Sunny. High near 64, with temperatures falling to around 61 in the afternoon. North wind around 6 mph.

Thursday Night: Mostly clear. Low around 38, with temperatures rising to around 41 overnight. East northeast wind around 2 mph.

Friday

High 59°F·Low 42°F

A chance of rain showers after 7am. Mostly cloudy, with a high near 59. East southeast wind 3 to 7 mph. Chance of precipitation is 40%.

Friday Night: A chance of rain showers. Mostly cloudy, with a low around 42. Chance of precipitation is 30%.

Saturday

High 63°F·Low 48°F

A chance of rain showers. Mostly cloudy, with a high near 63. Chance of precipitation is 50%.

Saturday Night: A chance of rain showers. Mostly cloudy, with a low around 48. Chance of precipitation is 30%.

Sunday

High 64°F·Low 49°F

A slight chance of rain showers before noon. Mostly cloudy, with a high near 64.

Sunday Night: Mostly cloudy, with a low around 49.

Monday

High 63°F·Low 48°F

Rain showers likely. Cloudy, with a high near 63. Chance of precipitation is 60%.

Monday Night: Rain showers likely. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.

Tuesday

High 61°F·Low 43°F

A chance of rain showers. Mostly cloudy, with a high near 61. Chance of precipitation is 50%.

Tuesday Night: A chance of rain showers. Mostly cloudy, with a low around 43.

Nearby cities

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About this forecast

Forecast office
Mason City is served by the National Weather Service DMX forecast office, forecast zone IAZ017, county zone IAC033.
Location used
The Census Bureau's internal point for Mason City (43.1478, -93.2004), in Cerro Gordo County. Population: 26,948 (2024 estimate), number 18 of the 27 Iowa cities on this site.
Radar
Nearest NWS radar: KDMX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/43.1478,-93.2004 (forecast issued Oct 28, 5:37 AM CDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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