Current Meteorological Analysis for San Francisco
Right now in San Francisco, United States, atmospheric conditions are registering a surface temperature of 18°C, with an apparent "feels like" temperature of 18°C. Temperatures holding at 18°C (feeling like 18°C) create a cool, brisk atmosphere across San Francisco, where light layering is recommended for outdoor comfort. Thermal sensation is governed by a relative humidity reading of 69% alongside sustained winds of 4 km/h arriving from the SE. A balanced ambient humidity of 69% (dew point 12°C) provides stable atmospheric moisture without oppressive mugginess.
Atmospheric pressure currently reads at 1011 hPa. Pressure levels near standard baseline (1013 hPa) indicate balanced conditions, whereas rising barometric pressure typically denotes stable anticyclonic air that suppresses heavy cloud formation. Conversely, drops in pressure indicate incoming atmospheric disturbances or localized convective systems. Horizontal visibility across San Francisco stands at 22 km, ensuring standard conditions for local roadway commutes and regional transit.
Rainfall & Precipitation Forecast: Is It Raining in San Francisco Today?
No, significant rainfall is not expected in San Francisco today. Current radar sweeps show dry atmospheric conditions with today's maximum probability of precipitation remaining low at 5% and expected rainfall accumulation around 0.4 mm. Residents, commuters, and travelers planning outdoor itineraries can consult the high-resolution radar loop and hourly precipitation forecast above to monitor storm track vectors, cloud thickness, and expected start times for any passing showers.
Regional rainfall patterns in San Francisco frequently fluctuate depending on seasonal winds, terrain, and atmospheric humidity fronts. Even when clear conditions prevail, convective afternoon heating can trigger brief localized showers. Keeping an umbrella accessible and monitoring updates ensures you stay prepared throughout the day.
Climate Profile & Weekly Outlook for San Francisco, United States
Located within North America, San Francisco experiences distinct seasonal patterns shaped by regional geographical coordinates and continental air masses. Over the upcoming 7 days, local temperatures are projected to range between comfortable or brisk lows of 11°C and peak afternoon highs reaching 20°C.
Tracking multi-day forecast trajectories provides essential foresight for agriculture, construction, sports, and weekend excursions. By comparing day-to-day temperature variations, expected precipitation percentages, and dominant wind directions in our 7-day outlook above, you can plan meetings, outdoor work, or travel with confidence.
Air Quality Index (AQI) & Outdoor Health Advisory for San Francisco
The air quality in San Francisco currently records a US AQI index of 58, placing local air conditions in the "Moderate" category. With an AQI score of 58, air quality is acceptable for the general public, though individuals exceptionally sensitive to particulate matter should monitor prolonged intense exertion outdoors. Major monitored pollutants include fine particulate matter PM2.5 at 10 µg/m³, coarse particulate PM10 at 13.7 µg/m³, ground-level ozone at 65 µg/m³, and nitrogen dioxide at 15 µg/m³.
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Individuals sensitive to air pollution—including young children, the elderly, and those managing asthma or cardiovascular sensitivities—should plan high-intensity outdoor exercises during hours of optimal atmospheric dispersion, and keep living spaces ventilated when ambient pollution indexes remain favorable.