| NWS Forecast for: Ottawa IL Issued by: National Weather Service Chicago, IL Last Update: 6:56 pm CDT Jul 15, 2025 | |
Tonight: A 20 percent chance of showers before 10pm. Partly cloudy, with a low around 72. South southeast wind around 5 mph becoming calm in the evening. Wednesday: Showers and thunderstorms likely, mainly after 4pm. Partly sunny, with a high near 90. Heat index values as high as 100. Southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Wednesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 69. West wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible. Thursday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 76. West wind around 10 mph becoming north in the afternoon. Winds could gust as high as 15 mph. Thursday Night: Mostly cloudy, with a low around 59. Northeast wind 5 to 10 mph, with gusts as high as 15 mph. Friday: Mostly sunny, with a high near 80. Friday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. Saturday: Showers and thunderstorms likely. Mostly cloudy, with a high near 84. Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Sunday: A chance of showers and thunderstorms. Partly sunny, with a high near 84. Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Monday: A chance of showers and thunderstorms. Partly sunny, with a high near 84. Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Tuesday: Mostly sunny, with a high near 87. | |
| Ottawa IL 41.35°N 88.85°W | |
Visit your local NWS office at: https://www.weather.gov/lot |