Weather forecast for: Harper IA
Last Update: 9:46 pm CDT Sep 18, 2026
Tonight: A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a steady temperature around 71. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday: A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 9am, then a chance of showers and thunderstorms after 9am. Mostly cloudy, with a high near 82. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 60%.
Saturday Night: Showers and thunderstorms likely before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 63. West wind 5 to 10 mph becoming northeast in the evening. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday: Showers likely, with thunderstorms also possible after 7am. Cloudy, with a high near 69. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night: Showers likely, mainly after 1am. Cloudy, with a low around 57. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Monday: Showers likely, mainly after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.
Monday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 52.
Tuesday: Mostly cloudy, with a high near 60.
Tuesday Night: Partly cloudy, with a low around 48.
Wednesday: Mostly sunny, with a high near 65.
Wednesday Night: Partly cloudy, with a low around 51.
Thursday: Partly sunny, with a high near 67.
Thursday Night: Partly cloudy, with a low around 54.
Friday: Mostly sunny, with a high near 68.
WeatherWorld.com
