BreatheCheck LIVE Get alerts

Anaheim, CA UV Index Today

Modelled for · GMT-7

What is the UV index in Anaheim right now?

5.5 High

EPA suggests shade between 10am and 4pm, plus a shirt and sunscreen.

Today's peak is 8.8 (Very High) at about 1pm local time.

When is UV strongest in Anaheim today?

UV in Anaheim peaks at 8.8 (Very High) around 1pm local time (GMT-7). It stays at 6 or above — the high band — for 4 hours, roughly 11am to 3pm. UV is 3 or above for 7 hours.

Local time, midnight to midnight. Bar colour is the EPA UV band, never restyled.

Anaheim today, in numbers

Latitude
33.8°N — 95 of 121 from the north
Today's peak
8.8 (Very High) — 10 of 121 nationally
Peak arrives
1pm local (GMT-7)
At or above 6
4 hours, 11am to 3pm
At or above 3
7 hours, 10am to 5pm

The window from 11am to 3pm is the practical answer for Anaheim today. Nationally today the spread runs 11.4 in Hilo (20°N) to 1.3 in Fargo (47°N). Why latitude and the clock decide this →

Morning gloom that clears before the peak

The May and June stratus that forms over the cold California Current and pushes ashore overnight does reach Anaheim, roughly a dozen miles inland on the Orange County plain. It does not usually stay as long as it does at the beach. Inland heating drives it back toward the coast through the late morning, so this version of June gloom costs the early hours and leaves the middle of the day intact, while Huntington Beach can stay capped another hour or two. On the days it does not clear at all the loss is real, which is what makes late spring the season worth checking here rather than assuming.

The floor matters more in this part of California than the ceiling does. At 33.8 degrees north the December noon sun still stands about 33 degrees above the horizon, higher than Seattle’s noon sun manages at any point between late October and mid-February. Winter in Anaheim is a reduced version of summer rather than a different regime.

The timing is what sets this stretch of coast apart. The cloudiest mornings of the year fall in May and June, sitting on top of the strongest sun of the year, where across much of the country the cloudiest months are the ones the sun is weakest in anyway. Which of the two governs a given late-spring day gets settled morning by morning rather than by the calendar.

Nearest metros we model

UV changes with latitude, not with a city boundary, so a neighbour a hundred miles north reads differently for a reason.

Irvine, CA 12 mi · 33.7°N peak 8.8 Long Beach, CA 17 mi · 33.8°N peak 8.8 Los Angeles, CA 24 mi · 34.0°N peak 8.5

What does Anaheim’s UV index mean today?

5.5 is High. EPA suggests shade between 10am and 4pm, plus a shirt and sunscreen. Today Anaheim also reaches Very High at its peak — a different band from the one it is in right now, which is why the hour matters as much as the day.

The scale is open-ended: 11 is where the named bands stop, not the maximum. All five bands, with the EPA guidance for each →

Modelled, not measured

The UV figures for Anaheim are computed by the Copernicus atmosphere model, not read off an instrument here — unlike the AQI on our air-quality pages, which comes from a regulatory monitor. Cloud is where a UV model is weakest. What that means in practice →

Questions about UV in Anaheim

What is the UV index in Anaheim today?

5.5 right now (High), peaking at 8.8 around 1pm local time. UV stays at 6 or above for 4 hours, from about 11am to 3pm. This is a modelled value, not a ground measurement.

When is UV strongest in Anaheim today?

Around 1pm local time (GMT-7), not at noon — solar noon drifts across a timezone and daylight saving moves it later on the clock.

Is this measured or modelled?

Modelled. The figures come from the Copernicus atmosphere model via Open-Meteo, unlike the AQI on our air-quality pages, which is read from an EPA regulatory monitor. Cloud cover is where a UV model is weakest.

Anaheim air qualityThe AQI, from a regulatory monitor rather than a model UV across the USWhere Anaheim sits against every metro we track

Updated