53066 Weather (Oconomowoc, WI)

Weather forecast for: Oconomowoc WI

Last Update: 12:41 am CDT Sep 19, 2026

Overnight: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 60. East wind 5 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Saturday: Showers and possibly a thunderstorm before 1pm, then scattered showers and thunderstorms between 1pm and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 69. Southeast wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Saturday Night: Showers and possibly a thunderstorm before 10pm, then showers likely. Low around 58. Southeast wind 5 to 10 mph becoming north in the evening. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.

Sunday: Isolated showers before 1pm. Mostly cloudy, with a high near 65. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

Sunday Night: Mostly cloudy, with a low around 52. Northeast wind 10 to 15 mph.

Monday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 63. East wind 10 to 15 mph.

Monday Night: Mostly cloudy, with a low around 48. Northeast wind 5 to 10 mph.

Tuesday: Partly sunny, with a high near 61. Northeast wind 10 to 15 mph.

Tuesday Night: Partly cloudy, with a low around 47.

Wednesday: Partly sunny, with a high near 64.

Wednesday Night: Partly cloudy, with a low around 48.

Thursday: Partly sunny, with a high near 67.

Thursday Night: Partly cloudy, with a low around 49.

Friday: Mostly sunny, with a high near 70.