| National Weather Service Forecast for:
Mason City IA Issued by: National Weather Service Des Moines, IA |
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| Updated: 1:31 am CDT Aug 20, 2026 | ||||||||||||||||||
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| Overnight |
Clear, with a low around 56. Calm wind. |
| Thursday |
Increasing clouds, with a high near 81. Light south wind increasing to 5 to 10 mph in the morning. |
| Thursday Night |
A slight chance of showers and thunderstorms between 8pm and 1am. Partly cloudy, with a low around 63. South southwest wind around 8 mph. Chance of precipitation is 20%. |
| Friday |
Sunny, with a high near 81. West southwest wind 6 to 10 mph becoming northwest in the afternoon. |
| Friday Night |
Mostly clear, with a low around 60. Northwest wind around 6 mph becoming calm in the evening. |
| Saturday |
Sunny, with a high near 78. |
| Saturday Night |
Mostly clear, with a low around 55. |
| Sunday |
Mostly sunny, with a high near 77. |
| Sunday Night |
Partly cloudy, with a low around 57. |
| Monday |
Partly sunny, with a high near 77. |
| Monday Night |
A 30 percent chance of showers. Partly cloudy, with a low around 60. |
| Tuesday |
Mostly sunny, with a high near 81. |
| Tuesday Night |
Partly cloudy, with a low around 62. |
| Wednesday |
Mostly sunny, with a high near 81. |
Forecast from NOAA-NWS for Mason City IA.
