UV Index
UV Index
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Today's UV index in San Ramon, United States 
will be up to 4.4, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 4.4 in San Ramon, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
San Ramon, California experiences a Mediterranean climate, characterized by mild winters and warm summers. The UV index is moderate, ranging from 3-7 throughout the year, with highest levels during summer months. This allows for comfortable outdoor activities year-round.
San Ramon has a distinct seasonal pattern, with cool and wet winters from December to March, and dry summers from June to September. Spring and autumn seasons are mild and pleasant, making them ideal for outdoor activities. The region's proximity to the Pacific Ocean moderates temperatures, preventing extreme heat or cold.
Compared to neighboring regions, San Ramon's weather is milder than the hot and dry deserts of Nevada and Arizona, but warmer than the foggy coasts of Oregon and Washington. The city's climate is also distinct from neighboring countries, with a drier and sunnier climate than Mexico's coastal regions, and a more temperate climate than British Columbia, Canada.