UV Index
Flagstaff UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index9.8
- Avg Clouds65%
- Max Temp30.9 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Flagstaff, United States 
will reach a high of 9.8 today. This means a veryhigh level of sun exposure. See our tips below to stay safe!
Last checked: 2025-08-22
Hourly Forecast Chart
Today's Safety Tips
The risk is very high. It's best to stay out of the sun between 10 a.m. and 4 p.m. If you must be outside, wear protective clothing and apply sunscreen often.
Flagstaff's UV Index
The UV index in Flagstaff is moderate to high during summer months, often ranging between 5 and 8, but it tends to be lower in winter, around 1 to 3. Seasonal patterns in Flagstaff show cold snowy winters with temperatures often below freezing, mild springs, warm summers with occasional thunderstorms, and cool, dry autumns. Compared to the wider region, Flagstaff is cooler and wetter than much of Arizona, which is mostly desert, and its higher elevation gives it more snow than neighboring states like New Mexico and Nevada.
Hourly UV Index Trend
See the UV index hour by hour for Flagstaff. When the level is high, it's smart to find some shade.
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