If you're deciding on Sonoma for 2026-09-12 – 2026-09-13, start with the numbers, then the plan.
Should you plan around Sonoma's forecast this weekend?
Weather watch
Sonoma this weekend: about 77°F with 0.00" of rain on the outlook — use that as the go / wait call.
Sonoma, California
Weekend air in Sonoma sits near 77°F / 53°F, plus a dry outlook with little to no rain — enough to decide whether the trip is on.
Treat Sonoma as the whole trip: build the day around dry, mild course days, then fill gaps with the local picks below.
If the numbers still look good by Friday, lock the plan around 77°F — not a vague “nice weather somewhere.”
Things to do
- Sonoma Coast State Park (4.8): Rugged coastal park with sandy beaches & picturesque headlands plus swimming, camping & picnicking.
- Sonoma Plaza (4.7): Plaza
- Sonoma TrainTown Railroad (4.5): Amusement park
Before you leave
Before you leave1
- Evening temperatures can drop from about 77°F to 53°F after sunset — pack a layer.
Before you leave6
- Check the destination weather window
- Download airline app
- Download offline maps
- Confirm reservations (hotel, cars, tours)
- Review airline baggage rules
- Share itinerary with a trusted contact
Bottom line
Sonoma this weekend: treat 77°F as the planning anchor, then build the itinerary around what you actually want to do.
Keep planning
Updated September 9, 2026. Not a substitute for local advisories.