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📍 Weather Radar - San Francisco

San Francisco Weather Forecast – Complete Guide to Weather Conditions in United States

Looking for accurate San Francisco weather information? You’ve come to the right place! Our comprehensive San Francisco weather forecast provides real-time meteorological data updated every 15 minutes, including current conditions, extended 16-day forecasts, hourly predictions, air quality monitoring, and UV index tracking. Whether you’re planning a trip, preparing for outdoor activities, or simply curious about the weather in San Francisco, United States, this page delivers all the information you need.

Current Weather Conditions in San Francisco

Right now, San Francisco is experiencing Partly Cloudy conditions. The current temperature is 5°C (feels like 3°C), with today’s high reaching 13°C and a low of 5°C. Generally favorable conditions with some cloud coverage that may provide welcome shade during warmer periods.

Current atmospheric conditions show relative humidity at 67%, barometric pressure at 1032 hPa, and winds blowing at 4 km/h. These conditions are typical for San Francisco during the winter season.

San Francisco 16-Day Weather Forecast

Our extended forecast for San Francisco weather shows varied conditions over the next 16 days. Average high temperatures are expected around 16°C, with lows averaging 10°C. The forecast period anticipates approximately 0mm of precipitation across 0 days with measurable rainfall.

Here’s a quick overview of the upcoming weather in San Francisco:

  • Saturday, Jan 10: Overcast, High 13°C / Low 5°C
  • Sunday, Jan 11: Overcast, High 14°C / Low 6°C
  • Monday, Jan 12: Overcast, High 17°C / Low 9°C
  • Tuesday, Jan 13: Clear Sky, High 18°C / Low 10°C
  • Wednesday, Jan 14: Clear Sky, High 19°C / Low 11°C
  • Thursday, Jan 15: Clear Sky, High 19°C / Low 12°C
  • Friday, Jan 16: Clear Sky, High 19°C / Low 12°C

San Francisco Air Quality Index (AQI)

The current San Francisco air quality index stands at 40, classified as Good. Air quality is satisfactory, and air pollution poses little or no risk. Ideal conditions for all outdoor activities.

Key pollutant readings for San Francisco include:

  • PM2.5 (Fine Particulate Matter): 9.9 µg/m³
  • PM10 (Coarse Particulate Matter): 10.2 µg/m³
  • O₃ (Ozone): 1 µg/m³

UV Index and Sun Protection in San Francisco

Today’s maximum San Francisco UV index is expected to reach 3, considered Moderate. Moderate UV exposure risk. Wear sunscreen SPF 30+, sunglasses, and seek shade during midday hours.

Sunrise in San Francisco occurs at 7:24 AM, with sunset at 5:09 PM, providing approximately 9.7 hours of daylight. Plan outdoor activities during these hours while taking appropriate sun protection measures based on the UV forecast.

Geographic Information for San Francisco

San Francisco is located in United States at coordinates 37.7749° N, 122.4194° W, in the Northern Hemisphere. The city sits at an elevation of approximately 18 meters above sea level.

This geographic position influences San Francisco’s climate patterns, contributing to its characteristic weather throughout the year. The latitude of 37.7749° affects day length variations and solar intensity across seasons, while the longitude of -122.4194° determines the local timezone and weather pattern timing.

San Francisco Climate Overview

Understanding San Francisco climate patterns helps visitors and residents plan activities throughout the year. The current winter season brings its typical weather characteristics to the region.

Weather patterns in San Francisco are influenced by its geographic location in United States, altitude, proximity to bodies of water, and prevailing wind patterns. These factors combine to create the distinctive climate that residents and visitors experience.

Best Time to Visit San Francisco

Planning a trip to San Francisco? The best time to visit San Francisco depends on your preferences and planned activities. Current conditions show 5°C with Partly Cloudy skies, which is suitable for prepared travelers.

Consider these factors when planning your visit:

  • Temperature preferences: Current highs around 13°C and lows near 5°C
  • Precipitation: 0 days with expected rainfall in the forecast period
  • UV exposure: UV index reaching 3 – Moderate level protection recommended
  • Air quality: Currently Good for outdoor activities

Weather-Based Activity Recommendations for San Francisco

Current Partly Cloudy conditions in San Francisco offer various activity options. Check hourly forecasts below to plan the best timing for your outdoor plans.

Frequently Asked Questions About San Francisco Weather

What is the weather like in San Francisco today?

Today in San Francisco, expect Partly Cloudy conditions with a high of 13°C and a low of 5°C. The current temperature is 5°C with 67% humidity.

What is the UV index in San Francisco?

The current UV index in San Francisco is 3, classified as Moderate. Moderate UV exposure risk. Wear sunscreen SPF 30+, sunglasses, and seek shade during midday hours.

Is the air quality good in San Francisco?

The current air quality index (AQI) in San Francisco is 40, rated as Good. Air quality is satisfactory, and air pollution poses little or no risk. Ideal conditions for all outdoor activities.

What is the weather forecast for San Francisco this week?

The 7-day forecast for San Francisco shows average highs of 16°C and lows of 10°C, with 0 days of expected precipitation totaling 0mm.

Additional San Francisco Weather Resources

This page provides comprehensive San Francisco weather data sourced from multiple meteorological services and updated in real-time. For the most accurate forecasts, we utilize:

  • Open-Meteo API – High-resolution weather forecasting
  • Air Quality API – Real-time pollution monitoring
  • UV Index API – Solar radiation measurements
  • Precipitation Radar – Live weather tracking

Bookmark this page for instant access to San Francisco weather forecast information whenever you need it. Data is refreshed every 15 minutes to ensure you always have the latest conditions.

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