UV Index
UV Index
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Today's UV index in Simi Valley, United States 
will be up to 4.9, 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 4.9 in Simi Valley, 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.
Simi Valley, California experiences a Mediterranean climate, characterized by mild, wet winters and hot, dry summers. The city's UV index is typically high, averaging 9-10 during the summer months, making it essential to take precautions.
The region has four distinct seasons, with winter temperatures ranging from 45°F to 63°F (7°C to 17°C), and summer temperatures between 73°F to 95°F (23°C to 35°C). Spring and autumn are mild, with temperatures between 64°F to 82°F (18°C to 28°C).
Compared to other regions in Southern California, Simi Valley's climate is slightly cooler than coastal areas due to its inland location. It is similar to neighboring cities like Thousand Oaks and Moorpark, but drier than countries like Mexico to the south, which experience a more humid climate.