Palo Alto UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index7.3
- Avg Clouds39%
- Max Temp30.7 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Palo Alto, United States 
will reach a high of 7.3 today. This means a high level of sun exposure. See our tips below to stay safe!
Last checked: 2025-09-18
Hourly Forecast Chart
Today's Safety Tips
Be careful! The sun's rays are strong. Try to stay in the shade between 10 a.m. and 4 p.m. Wear a hat, sunglasses, and reapply SPF 30+ sunscreen every 2 hours.
Palo Alto's UV Index
Palo Alto's UV index is usually moderate, ranging from 3 to 7 depending on the season. It reaches higher levels in summer, often between 8 and 10 during peak midday hours. UV exposure is lower in winter months.
Weather Seasons
Palo Alto has warm, dry summers with temperatures around 75-85°F and mild, wet winters with temperatures between 45-60°F. Most rain falls from November to March, while summer months are mostly sunny and dry, typical of a Mediterranean climate.
Palo Alto's Climate
Compared to the wider California Bay Area, Palo Alto is slightly warmer and drier, especially in summer. Compared to neighboring states like Oregon or Nevada, it has milder winters and less snowfall, with less humidity than coastal areas to the west.
Hourly UV Index Trend
See the UV index hour by hour for Palo Alto. When the level is high, it's smart to find some shade.
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