UV index for Salt Lake City peaks at UV 6 at 13:00 local time. Data as of (America/Denver). Values update hourly — see this page for the current reading and hourly forecast.

uvi·today

UV Index in Salt Lake City

Live UV index for Salt Lake City, United States — current level, hourly UV forecast, peak times, WHO sun protection advice and a 5-day outlook. Now: UV 0 (Low). Peak today: UV 6 at 13:00.

Now · 06:00 · Salt Lake City
0
Low
0–2Low3–5Moderate6–7High8–10Very High11+Extreme

Sun protection needed today: 11:00–16:00

Protection guidelines:

Max today · 13:00 — UV 6 · High · Clear sky: 6 at 13:00

  • Seek shade during midday hours
  • Wear a shirt, apply broad-spectrum sunscreen, and put on a hat
  • Wear UV-blocking sunglasses
Values are forecasts from the European CAMS model (Copernicus), not measurements from a sensor in Salt Lake City. WHO · Methodology
Today's UV overview · Thu, Oct 8
1
9Clear sky16°59%1
2
10Clear sky19°51%1
4
11Clear sky23°37%1
5
12Clear sky26°29%1
6
13Clear sky28°23%1
5
14Clear sky29°21%2
4
15Clear sky29°20%3
2
16Overcast29°23%5
1
17Partly cloudy28°22%4
% HumidityWind m/s
Max today
6at 13:00
Max tomorrow
5at 13:00
Daylight today
11h 27m07:31–18:58
Solar noon
13:15

Sun & moon in Salt Lake City

Sun height-8°
Sun directionE 91°
Sky stateNautical twilight
-90°-60°-30°0°30°60°90°00:0006:0012:0018:0024:00Now -8°

The curve traces the sun's height above the horizon through the day: 0° is the horizon, 90° is straight overhead. The higher the sun climbs, the shorter the path its rays take through the atmosphere — and the stronger the UV. The part below 0° is night.

Sunrise / sunset directionE 97° / W 262°
Civil twilight07:04–07:31 / 18:57–19:25
Nautical twilight06:32–07:04 / 19:25–19:56
Astronomical twilight06:00–06:32 / 19:56–20:28
Moon phaseWaning crescent · 5%
Moonrise / moonset05:24 / 17:54
Next moon quarterNew moon · Oct 10, 09:50

Detailed hourly UV index — Today, Oct 8

Peak UV 5.7 at 13:00 · Salt Lake City · Local time (MDT)

The solid line is the hourly UV forecast: the UV index expected each hour, with cloud cover taken into account. The dashed line is the clear-sky UV, the level it would reach under a cloudless sky. The gap between the two lines shows how much the clouds are lowering the UV.

0246Max: 6Now: 06:0017°9:0016°12:0026°15:0029°18:0027°21:0022°
ForecastClear sky

Detailed hourly UV index — Tomorrow, Oct 9

Peak UV 5.3 at 13:00 · Salt Lake City · Local time (MDT)

0246Max: 56:0018°9:0019°12:0028°15:0028°18:0027°21:0023°
ForecastClear sky
Hour-by-hour UV index for today & tomorrow

Detailed hour-by-hour UV index forecast for Salt Lake City — today and tomorrow. Includes UV level, clear-sky UV, weather conditions, and temperature for each hour.

Today — Oct 8

HourUVClear skyWeather
05:000.0 – Low0.0Overcast20°
06:000.0 – Low0.0Overcast17°
07:000.0 – Low0.0Mainly clear18°
08:000.1 – Low0.1Clear sky16°
09:000.8 – Low0.8Clear sky16°
10:002.0 – Low2.0Clear sky19°
11:003.7 – Moderate3.7Clear sky23°
12:005.1 – Moderate5.1Clear sky26°
13:005.7 – High5.7Clear sky28°
14:005.2 – Moderate5.3Clear sky29°
15:004.0 – Moderate4.0Clear sky29°
16:002.4 – Low2.4Overcast29°
17:001.0 – Low1.0Partly cloudy28°
18:000.2 – Low0.2Clear sky27°
19:000.0 – Low0.0Clear sky24°
20:000.0 – Low0.0Clear sky22°
21:000.0 – Low0.0Clear sky22°

Tomorrow — Oct 9

HourUVClear skyWeather
05:000.0 – Low0.0Clear sky19°
06:000.0 – Low0.0Clear sky18°
07:000.0 – Low0.0Clear sky19°
08:000.1 – Low0.1Clear sky18°
09:000.7 – Low0.7Clear sky19°
10:001.9 – Low1.9Clear sky22°
11:003.5 – Moderate3.5Clear sky26°
12:004.7 – Moderate4.8Partly cloudy28°
13:005.3 – Moderate5.4Overcast28°
14:004.5 – Moderate5.0Mainly clear29°
15:003.2 – Moderate3.7Overcast28°
16:001.9 – Low2.1Overcast28°
17:000.7 – Low0.8Overcast28°
18:000.2 – Low0.2Overcast27°
19:000.0 – Low0.0Partly cloudy24°
20:000.0 – Low0.0Overcast23°
21:000.0 – Low0.0Overcast23°

5-Day UV Forecast for Salt Lake City

The 5-day UV index forecast shows each day's peak UV and the time it's reached, plus daily high and low temperatures and an hourly UV curve, so you can plan sun protection for the days ahead.

Today, Oct 8Peak UV 6 at 13:00Sun protection: 11:00–16:0029° / 16°
6Overcast17°9Clear sky16°12Clear sky26°15Clear sky29°18Clear sky27°
Friday, Oct 9Peak UV 5 at 13:00Sun protection: 11:00–16:0029° / 18°
6Clear sky18°9Clear sky19°12Partly cloudy28°15Overcast28°18Overcast27°
Saturday, Oct 10Peak UV 5 at 13:00Sun protection: 11:00–15:0029° / 20°
6Light drizzle20°9Light drizzle21°12Light drizzle25°15Overcast28°18Clear sky27°
Sunday, Oct 11Peak UV 2 at 13:0025° / 16°
6Overcast20°9Light rain16°12Overcast21°15Light drizzle21°18Dense drizzle19°
Monday, Oct 12Peak UV 5 at 13:0022° / 15°
6Clear sky16°9Clear sky16°12Clear sky20°15Overcast22°18Overcast20°

Peak midday UV by month in Salt Lake City

It's October: on clear days, the midday sun here usually peaks around UV 3–6. That's strong enough that your skin needs protection in the middle of the day.

Over the year, the sun is strongest in June–July (up to UV 11 on clear days) and weakest in December (around 1–2 at midday). Treat these numbers as the most sun you should expect around noon: clouds typically lower the real value, while reflections from snow, sand or water can add to the UV your skin actually receives. Today's actual UV is in the forecast above.

368112–3Jan2–4Feb3–7Mar5–9Apr7–10May8–11Jun9–11Jul7–10Aug5–9Sep3–6Oct2–3Nov1–2Dec

Each bar shows the range the midday UV index moves through on clear days in that month, from the gentlest days up to what the strongest days typically reach, based on 17 years of satellite data (2004–2020). The small light line inside a bar is an ordinary day's midday level.

Based on TEMIS data. Copyright © KNMI/ESA — https://www.temis.nl/

In October the strong sun is in the southern hemisphere: UV reaches high levels across most of it, while the northern hemisphere outside the tropics has its mild season.

See the world map for October →

The UV year at a glance

Strongest sunJun–Jul · up to 11
Weakest sunDec · up to 2
Protection needed (UV 3+)Jan–Nov
Extra protection (UV 8+)Apr–Sep

Months when the midday sun gets strong enough to need protection. Based on clear days; clouds typically lower UV.

See also: Salt Lake City temperature and rainfall by month →

UV in Salt Lake City: today, tomorrow and through the year

In Salt Lake City, the UV index reads 0 (low) right now, and the day tops out at 6 (high) around 13:00, so it's worth covering up between 11:00 and 16:00. Clear conditions leave the sun barely filtered today.Tomorrow looks much the same, with the peak near UV 5 (moderate) around 13:00 and the same protection hours as today. It turns cloudier later in the week, which should ease the UV.The strongest months in Salt Lake City are behind it by October, and UV eases further over the months that follow.

Location, daylight and sky in Salt Lake City

Key facts

CountryUnited States, Utah
TimezoneAmerica/Denver (UTC-6)
Coordinates40.76° N, 111.89° W
Elevation1302 m
Population≈ 216K
Air pressurebarometer.today

Sun & Daylight Hours in Salt Lake City

Sunrise / sunset07:31 / 18:58
Daylight today11h 27m
Daylight tomorrow11h 24m (-3 min)
Solar noon (sun highest)13:15
Golden hour18:21–19:14
Low UV hours (UV < 3)07:00–11:00
16:00–18:00
High UV window (UV ≥ 3)11:00–16:00

Seasonal daylight range at this latitude

Longest day15h 06m (Jun 21)
Shortest day9h 15m (Dec 21)

Similar daylight hours as New York, United States — on the same parallel

UV index map for Salt Lake City and nearby cities

This map shows the current UV forecast for Salt Lake City and the area around it. One forecast value covers a region of roughly 40 km, so it is a good guide for the area as a whole rather than an exact reading for one spot. In places with big height differences, or where the ground is covered by snow, the real UV can differ from what the map shows.

Check UV in: Provo · Spring Valley · Paradise · North Las Vegas · Las Vegas

Air quality concerns? Check air quality in Salt Lake City on AirIndex.Today

What is the UV index in Salt Lake City right now?

As of 06:00 local time, the UV index in Salt Lake City is 0 (Low). UV changes hour by hour. See the hourly chart above for how it rises and falls today.

What is the UV index in Salt Lake City today?

On 2026-10-08, the peak UV index forecast for Salt Lake City is 6, expected around 13:00 local time. Check back daily: UV levels change with cloud cover, ozone, and sun angle. Salt Lake City sits at 1302 m elevation, where UV radiation is stronger than at sea level (roughly +10% per 1,000 m).

What is the UV index in Salt Lake City tomorrow?

On 2026-10-09, the UV index in Salt Lake City is forecast to peak at 5 around 13:00 local time. Plan outdoor activities and sun protection around that peak.

What are typical maximum UV levels in Salt Lake City by month?

Peak midday UV index in Salt Lake City, month by month
MonthPeak midday UV
January2–3
February2–4
March3–7
April5–9
May7–10
June8–11
July9–11
August7–10
September5–9
October3–6
November2–3
December1–2
The weakest sun is in December, when midday UV stays around 1–2. From there it climbs: January (2–3), February (2–4), March (3–7), April (5–9), and May (7–10). The strongest sun is in June and July, reaching 8–11 on clear days. It eases back through August (7–10), September (5–9), October (3–6), and November (2–3).Clear-sky range, 17 years of satellite data (2004–2020). On cloudy days values are typically lower.

How strong is UV in Salt Lake City in October?

In a typical October, the midday UV index in Salt Lake City reaches 3–6 on clear days, based on 17 years of satellite data (2004–2020). Cloudy days typically run lower. Check the live forecast for today's value.

Which months have the highest UV in Salt Lake City?

UV in Salt Lake City is highest in June–July, when the midday index reaches up to 11 on clear days. The weakest sun is in December, around 1–2 at midday.

When do you need sun protection in Salt Lake City?

In January–November, the midday sun in Salt Lake City regularly reaches UV 3 or higher, the level at which the WHO recommends protection (shade, clothing, sunscreen). In April–September it can reach UV 8 or more, when the WHO advises extra protection: avoid the midday sun and cover up.

Forecast · UV Index

Now
UV 0 (Low)
Max today
UV 5.7 · 13:00
Max tomorrow
UV 5.3 · 13:00
Clear sky
UV 5.7
Sunrise / Sunset
07:31 / 18:58
High UV window (UV ≥ 3)
11:00–16:00
5-Day UV Forecast
Thu 5.7 · Fri 5.3 · Sat 4.9 · Sun 1.9 · Mon 4.8

UV guides

Read all guides →
About the UV Index

What is the UV index?

The UV index (UVI) is an international standard measure of the strength of ultraviolet radiation from the sun at a particular place and time. It ranges from 0 (nighttime) to 11+ (extreme). Higher values mean greater risk of sunburn, skin damage, and eye injury. The UV index was developed by the World Health Organization (WHO) to help people protect themselves from harmful UV radiation.

How do I check the UV index today?

This page shows the live UV index for your location using data from the Copernicus Atmosphere Monitoring Service (CAMS). You get the current UV level, an hourly UV forecast chart for today and tomorrow, and the exact peak UV time — so you always know when sun protection is most important.

When is UV radiation strongest?

UV radiation is typically strongest between 10:00 and 16:00, when the sun is highest in the sky. However, the exact peak time and intensity depend on your latitude, the season, altitude, cloud cover, and ozone levels. Check the UV forecast chart above to see today's exact peak time for your location.

How can I protect myself from UV radiation?

Apply broad-spectrum sunscreen, wear protective clothing and a wide-brimmed hat, seek shade during peak UV hours, and wear UV-blocking sunglasses. The WHO recommends sun protection when the UV index is 3 or above.

Where does the UV data come from?

The hourly UV index on this site comes from the Copernicus Atmosphere Monitoring Service (CAMS), operated by ECMWF on behalf of the European Union. CAMS calculates the UV biologically effective dose using total column ozone, aerosol optical depth, and cloud cover. The global forecast has a spatial resolution of approximately 40 km and provides hourly UV index values for up to 5 days ahead.

What does "clear-sky UV index" mean?

The clear-sky UV index shows how strong ultraviolet radiation would be if there were no clouds at all. It is calculated using the same atmospheric data — ozone column thickness, aerosol concentrations, and solar angle — but assumes completely cloudless conditions. Comparing the actual UV index with the clear-sky value shows how much clouds are reducing UV exposure at any given time. On overcast days, actual UV can be significantly lower than the clear-sky value.

How often is the UV forecast updated?

The CAMS global UV forecast is updated twice daily, based on model runs initialized at 00:00 and 12:00 UTC. Weather data such as temperature, cloud cover, and sunrise/sunset times is updated every 1–6 hours depending on the region, using weather models from national meteorological services via Open-Meteo. The first 1–2 days of the forecast are typically the most accurate.

What does the WHO recommend for each UV level?

Low (0–2) — No protection needed. You can safely enjoy being outside
Moderate (3–5) — Seek shade during midday hours. Wear a shirt, apply broad-spectrum sunscreen, and put on a hat. Wear UV-blocking sunglasses
High (6–7) — Seek shade during midday hours. Wear a shirt, apply broad-spectrum sunscreen, and put on a hat. Wear UV-blocking sunglasses
Very High (8–10) — Avoid being outside during midday hours. Make sure you seek shade. Shirt, broad-spectrum sunscreen and hat are a must
Extreme (11+) — Avoid being outside during midday hours. Make sure you seek shade. Shirt, broad-spectrum sunscreen and hat are a must

Source: WHO Global Solar UV Index, 2002

uvi·today

Disclaimer: This website is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. UV index data and sun protection guidance are approximate and should not replace professional advice. UV index data is not applicable to infants under 12 months. The WHO recommends keeping them out of direct sunlight at all times. WHO. UV forecasts are based on satellite and atmospheric models. Actual UV levels may vary due to local cloud cover, surface reflection, altitude, and other environmental factors. When in doubt, consult a healthcare provider for personalized sun protection advice. UV and weather data is sourced from third-party APIs (Open-Meteo/CAMS). We do not guarantee accuracy or availability. Data may be delayed or temporarily unavailable.

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UV & weather data: Open-Meteo (CAMS/Copernicus) · Protection guidelines: WHO Global Solar UV Index, 2002 · Location data: GeoNames (CC BY 4.0) · IP2Location LITE · Yr / NRK (CC BY 4.0) · Twemoji (CC BY 4.0)

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