Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Discover the weather conditions in San Francisco & see if there is a chance of rain, snow, or sunshine. Plan your activities, travel, or work with confidence by checking out our detailed hourly forecast for San Francisco. Check hourly and daily rain probability for any city. Find out if you need an umbrella today with live weather data. Yes, there is a 21% chance of rain in City and County of San Francisco tomorrow. We recommend carrying an umbrella or rain gear to stay dry. The wind in City and County of San Francisco is expected to blow at 13.7 mph. This could affect outdoor activities, so plan accordingly. Today's and tonight's professional weather forecast for San Francisco. Precipitation radar, HD satellite images, and current weather warnings, hourly temperature, chance of rain, and sunshine hours. See the links below the 12-day San Francisco weather forecast table for other cities and towns nearby along with weather conditions for local outdoor activities. Hazardous Weather Conditions Beach Hazards Statement until August 1, 05:00 PM PDT Current conditions at SAN FRANCISCO DOWNTOWN (SFOC1) Lat: 37.77056°N Lon: 122.42694°W Elev: 150.0ft. Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Dangerous and extreme heat will remain across portions of the southern U.S. this week. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. NBC Bay Area meteorologists use microclimate weather to bring you local weather forecasts and radar from San Francisco, Oakland and San Jose.