Bay Area event weather
What the weather actually does during the event.
A city forecast does not tell you what conditions will be like during the hours you are outside. These guides follow the event schedule and its most important weather sensitivities, then switch to a detailed forecast as the event approaches.
Flower Piano Weather 2026
September 10–20, 2026 · San Francisco Botanical Garden
With eleven possible days, wait for the seven-day comparison and choose for the combination of clearing, low wind, and no rain rather than temperature alone.
Mountain View Art & Wine Festival Weather 2026
September 12–13, 2026 · Downtown Mountain View
Compare Saturday and Sunday for the 1–5 p.m. heat peak, AQI, and the timing of the afternoon breeze. Sunday’s earlier opening may offer the cooler arrival.
Dreamforce Weather 2026
September 15–17, 2026 · Moscone Center
The early Moscone signal points to a normal September: cool arrival, mild afternoon, and dry crossings between buildings. The bigger question is whether a heat spike lands on conference week.
Portola Music Festival Weather 2026
September 26–27, 2026 · Pier 80
Pointing toward a normal Portola weekend: mild afternoons, steady wind off the Bay, and a cold walk out. The after-dark number matters more than the daytime high.
Folsom Street Fair Weather 2026
September 27, 2026 · Folsom Street in SoMa
Late September is when SoMa gets its best weather, low 70s and bright. If you came in from a foggy neighborhood expecting the same, you will be overdressed. Sun exposure is the real issue.
San Francisco Fleet Week Weather 2026
October 4–12, 2026 · San Francisco waterfront
Crissy Field sits near 60°F on a show afternoon, which is the least interesting number on this page. What decides the day is the cloud ceiling over the Golden Gate: it determines whether the Blue Angels fly the high show, the low show, or the flat show.
Half Moon Bay Pumpkin Festival Weather 2026
October 17–18, 2026 · Main Street, Half Moon Bay
A gray 60°F at nine in the morning, upper 60s once the marine layer lifts. The weather that will actually affect your day is on Highway 1 and Highway 92, not on Main Street.
Cal–Stanford Big Game Weather 2026
November 21, 2026 · kickoff TBA · California Memorial Stadium
Everything here depends on kickoff, which is still unannounced. A noon game is mild and bright at 63°F. A night game finishes near 55°F on an exposed hillside, and November brings a real chance of rain.
Silicon Valley Turkey Trot Weather 2026
November 26, 2026 · Downtown San Jose
Cold at the start line and mild by the time you finish. Around 46°F when gear check opens, close to 64°F by noon. Dress for the corral wait, not the race.
Christmas in the Park San Jose Weather 2026
November 27, 2026–January 1, 2027 · Plaza de Cesar Chavez
December evenings downtown run in the low 50s, with rain on roughly a quarter of nights. The display runs for five weeks, so the useful question is which evening to pick, not what to pack.
San Francisco New Year’s Eve Fireworks Weather 2026
December 31, 2026 · official confirmation pending · Ferry Building and Embarcadero waterfront
Around 53°F on the waterfront and colder in the wind, with rain on about a third of December nights. The number that decides your night is not temperature, it is whether a low cloud deck sits over the Bay at midnight.
Outside Lands Weather 2026
August 7–9, 2026 · Golden Gate Park
This Outside Lands weekend has ended. The evergreen guide remains active and will roll forward when the next official dates are published.
Oakland Pride Weather 2026
August 16, 2026 · Frank Ogawa Plaza and downtown Oakland
This Oakland Pride occurrence has ended. The guide remains available and will update when the next official parade and festival schedule is announced.
Silicon Valley Pride Weather 2026
August 29–30, 2026 · Plaza de César Chávez and downtown San Jose
This Silicon Valley Pride weekend has ended. The weather guide remains available and will roll forward when the next dates are official.
Pleasanton Scottish Highland Games Weather 2026
September 5–6, 2026 · Alameda County Fairgrounds
The 2026 Scottish Games have ended. The evergreen Pleasanton weather guide remains available for the next official occurrence.
Millbrae Art & Wine Festival Weather 2026
September 5–6, 2026 · Downtown Millbrae
The 2026 Millbrae Art & Wine Festival has ended. The guide remains active for the next announced Labor Day weekend.