Vacaville Weather Forecast
Weather forecast for: Vacaville CA
Last Update: 11:31 am PDT Sep 26, 2026
Today: Partly sunny, with a high near 78. South southwest wind 3 to 7 mph.
Tonight: Mostly cloudy, with a low around 57. Southwest wind 3 to 6 mph.
Sunday: Cloudy through mid morning, then gradual clearing, with a high near 75. Light southwest wind increasing to 5 to 9 mph in the morning.
Sunday Night: Mostly clear, with a low around 55. Southwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Monday: Sunny, with a high near 86. Calm wind becoming northwest around 5 mph in the afternoon.
Monday Night: Clear, with a low around 63.
Tuesday: Sunny and hot, with a high near 96.
Tuesday Night: Clear, with a low around 63.
Wednesday: Sunny, with a high near 94.
Wednesday Night: Clear, with a low around 63.
Thursday: Sunny, with a high near 90.
Thursday Night: Mostly clear, with a low around 63.
Friday: Sunny, with a high near 91.