Weather forecast for: Cottage Grove OR
Last Update: 12:41 am PDT Sep 6, 2026
Overnight: A 20 percent chance of showers after 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 47. Calm wind.
Sunday: Showers and thunderstorms likely before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Areas of fog before 9am. Otherwise, partly sunny, with a high near 68. Calm wind. Chance of precipitation is 60%.
Sunday Night: A 30 percent chance of showers, mainly before 7pm. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 46. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Labor Day: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 72. Light and variable wind.
Monday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 45. Light northeast wind.
Tuesday: Patchy fog before 8am. Otherwise, sunny, with a high near 77.
Tuesday Night: Mostly clear, with a low around 49.
Wednesday: Sunny, with a high near 87.
Wednesday Night: Clear, with a low around 55.
Thursday: Sunny, with a high near 86.
Thursday Night: Mostly clear, with a low around 54.
Friday: Mostly sunny, with a high near 78.
Friday Night: A slight chance of rain. Partly cloudy, with a low around 50.
Saturday: A slight chance of rain. Mostly sunny, with a high near 75.