UV Index Tucson, AZ today
Hourly forecast for 1:00 AM MST, the current hour in Tucson (Tuesday, October 27)
No protection needed for most people.
UV is effectively zero at Tucson right now. Tomorrow is forecast to peak at 6.1 around 12:00 pm.
Sun protection times
Calculated from the clear-sky forecast, so it assumes no cloud. Cloud may reduce the UV level on the day, but it can clear at any time — treat these as the hours to be careful.
Today's forecast
Peak 5.8 at 12:00 pm, with cloud included.
Tomorrow
Forecast to peak at 6.1 High around 12:00 pm.
What to do today
UV is forecast to reach 5.8 High later today.
- Slip on clothing that covers your shoulders and back.
- Slop on SPF 50+ sunscreen 20 minutes before going out, and reapply every two hours.
- Slap on a broad-brimmed hat, and wrap on sunglasses.
- Stay in the shade between mid-morning and mid-afternoon where you can.
- Water, sand and concrete reflect UV and increase your exposure.
What the UV index numbers mean
Nearby
Forecast: US Environmental Protection Agency and the Copernicus Atmosphere Monitoring Service. About the EPA UV Index.
Forecast contains modified Copernicus Atmosphere Monitoring Service information 2026. Neither the European Commission nor ECMWF is responsible for any use of this information.