Weather forecast for: Fountain Valley CA
Last Update: 5:56 pm PDT Oct 31, 2026
Tonight: Rain. Low around 58. South wind around 5 mph becoming calm. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday: Rain likely before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 72. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night: Mostly clear, with a low around 56. Calm wind becoming east around 5 mph.
Monday: Sunny, with a high near 75. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night: Partly cloudy, with a low around 57. West wind around 5 mph becoming calm in the evening.
Tuesday: Sunny, with a high near 76.
Tuesday Night: Mostly clear, with a low around 57.
Wednesday: Sunny, with a high near 75.
Wednesday Night: Mostly clear, with a low around 57.
Thursday: Mostly sunny, with a high near 76.
Thursday Night: Mostly clear, with a low around 58.
Friday: Sunny, with a high near 79.
Friday Night: Mostly clear, with a low around 60.
Saturday: Sunny, with a high near 83.