UV Index Portland, OR today
Hourly forecast for 1:00 AM PDT, the current hour in Portland (Tuesday, October 27)
No protection needed for most people.
UV is effectively zero at Portland right now. Tomorrow is forecast to peak at 1.3 around 12:00 pm.
Today's forecast
Peak 0.7 at 3:00 pm, with cloud included. Cloud is forecast to keep UV below the level at which sun protection is usually advised, but it can clear at any time.
Tomorrow
Forecast to peak at 1.3 Low around 12:00 pm.
This time of year
In October, NOAA's noon forecasts for Portland typically put the UV around 2.0 Low.
Across 2015–2024, NOAA forecast UV of:
- 3 or more, when sun protection is needed, on 44% of October days
- 8 or more, Very High or worse, on no October days
- 11 or more, Extreme, on no October days
From the NOAA/EPA UV Index bulletins archived by NOAA's Climate Prediction Center: forecasts for solar noon, cloud included, not measurements; 310 October days.
What to do tomorrow
Tomorrow is forecast to reach 1.3 Low.
- No protection needed for most people during normal outdoor activity.
- If you burn easily or will be out for hours, a hat and sunscreen still help.
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.