UV index for Arequipa peaks at UV 17 at 11:00 local time. Data as of (America/Lima). Values update hourly — see this page for the current reading and hourly forecast.

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UV Index in Arequipa

Live UV index for Arequipa, Peru — current level, hourly UV forecast, peak times, WHO sun protection advice and a 5-day outlook. Now: UV 0 (Low). Peak today: UV 17 at 11:00.

Now · 18:00 · Arequipa
0
Low
0–2Low3–5Moderate6–7High8–10Very High11+Extreme

Sun protection needed today: 08:00–16:00

Protection guidelines:

Max tomorrow · 11:00 — UV 17 · Extreme · Clear sky: 17 at 11:00

  • Avoid being outside during midday hours
  • Make sure you seek shade
  • Shirt, broad-spectrum sunscreen and hat are a must
Values are forecasts from the European CAMS model (Copernicus), not measurements from a sensor in Arequipa. WHO · Methodology
Today's UV overview · Tue, Oct 13
2
7Clear sky18°12%1
6
8Clear sky23°7%1
10
9Clear sky23°10%4
14
10Clear sky24°16%3
17
11Clear sky23°28%4
16
12Clear sky23°32%4
14
13Clear sky23°31%5
9
14Clear sky22°35%4
5
15Clear sky20°46%4
2
16Mainly clear19°53%3
% HumidityWind m/s
Max today
17at 11:00
Max tomorrow
17at 11:00
Daylight today
12h 26m05:19–17:45
Solar noon
11:32

Sun & moon in Arequipa

Sun height-4°
Sun directionW 260°
Sky stateCivil twilight
-90°-60°-30°0°30°60°90°00:0006:0012:0018:0024:00Now -4°

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 98° / W 261°
Civil twilight04:57–05:20 / 17:44–18:07
Nautical twilight04:32–04:57 / 18:07–18:32
Astronomical twilight04:06–04:32 / 18:32–18:58
Moon phaseWaxing crescent · 11%
Moonrise / moonset07:08 / 20:34
Next moon quarterFirst quarter · Oct 18, 11:13

Detailed hourly UV index — Today, Oct 13

Peak UV 16.5 at 11:00 · Arequipa · Local time (GMT-5)

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.

051015Max: 17Now: 06:0014°9:0023°12:0023°15:0020°18:0015°21:0014°
ForecastClear sky

Detailed hourly UV index — Tomorrow, Oct 14

Peak UV 16.7 at 11:00 · Arequipa · Local time (GMT-5)

051015Max: 176:0011°9:0021°12:0024°15:0023°18:0017°21:0015°
ForecastClear sky
Hour-by-hour UV index for today & tomorrow

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

Today — Oct 13

HourUVClear skyWeather
05:000.0 – Low0.0Clear sky13°
06:000.4 – Low0.4Clear sky14°
07:002.1 – Low2.1Clear sky18°
08:005.7 – High5.7Clear sky23°
09:0010.2 – Very High10.3Clear sky23°
10:0014.3 – Extreme14.4Clear sky24°
11:0016.5 – Extreme16.6Clear sky23°
12:0016.3 – Extreme16.3Clear sky23°
13:0013.5 – Extreme13.5Clear sky23°
14:009.2 – Very High9.2Clear sky22°
15:004.8 – Moderate4.8Clear sky20°
16:001.6 – Low1.6Mainly clear19°
17:000.2 – Low0.2Mainly clear17°
18:000.0 – Low0.0Mainly clear15°
19:000.0 – Low0.0Mainly clear15°
20:000.0 – Low0.0Clear sky14°
21:000.0 – Low0.0Clear sky14°

Tomorrow — Oct 14

HourUVClear skyWeather
05:000.0 – Low0.0Clear sky11°
06:000.4 – Low0.4Clear sky11°
07:002.1 – Low2.1Clear sky14°
08:005.7 – High5.7Clear sky18°
09:0010.3 – Very High10.3Clear sky21°
10:0014.5 – Extreme14.5Clear sky23°
11:0016.7 – Extreme16.7Clear sky23°
12:0016.4 – Extreme16.4Clear sky24°
13:0013.6 – Extreme13.6Clear sky24°
14:009.2 – Very High9.2Clear sky23°
15:004.8 – Moderate4.8Clear sky23°
16:001.6 – Low1.6Clear sky21°
17:000.2 – Low0.2Clear sky19°
18:000.0 – Low0.0Clear sky17°
19:000.0 – Low0.0Clear sky16°
20:000.0 – Low0.0Clear sky15°
21:000.0 – Low0.0Clear sky15°

5-Day UV Forecast for Arequipa

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 13Peak UV 17 at 11:00Sun protection: 08:00–16:0024° / 12°
6Clear sky14°9Clear sky23°12Clear sky23°15Clear sky20°18Mainly clear15°
Wednesday, Oct 14Peak UV 17 at 11:00Sun protection: 08:00–16:0024° / 11°
6Clear sky11°9Clear sky21°12Clear sky24°15Clear sky23°18Clear sky17°
Thursday, Oct 15Peak UV 16 at 11:00Sun protection: 08:00–16:0025° / 13°
6Clear sky13°9Clear sky22°12Clear sky25°15Clear sky23°18Clear sky17°
Friday, Oct 16Peak UV 17 at 11:00Sun protection: 08:00–16:0025° / 10°
6Clear sky10°9Clear sky22°12Clear sky25°15Clear sky23°18Clear sky18°
Saturday, Oct 17Peak UV 17 at 11:00Sun protection: 08:00–16:0025° / 11°
6Clear sky14°9Clear sky21°12Clear sky25°15Clear sky23°18Clear sky18°

Peak midday UV by month in Arequipa

It's October: on clear days, the midday sun here usually peaks around UV 14–17. That's very intense: around midday you need shade, covering clothes and sunscreen.

The sun is strong here all year round: even in the mildest months, midday UV reaches about 9, so protection is needed in every season. 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.

36811141716–19Jan16–19Feb14–18Mar11–15Apr8–12May7–9Jun8–10Jul9–13Aug12–15Sep14–17Oct15–18Nov16–18Dec

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 sunJan–Feb · up to 19
Weakest sunJun · up to 9
Protection needed (UV 3+)all year
Extra protection (UV 8+)all year

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

UV in Arequipa: today, tomorrow and through the year

After a daytime high of 17 (extreme) near 11:00, UV in Arequipa has dropped away for the day. It was a clear day, with little cloud to soften the sun. Up at 2,326 m, the thinner air at this altitude lets through more UV than at sea level.Tomorrow looks much the same, with the peak near UV 17 (extreme) around 11:00 and protection needed from 08:00 to 16:00.Across the year, October sits near the top of the UV range in Arequipa: its strongest days reach about UV 17, and even the quietest months stay around UV 9.

Location, daylight and sky in Arequipa

Key facts

CountryPeru, Arequipa
TimezoneAmerica/Lima (UTC-5)
Coordinates16.40° S, 71.54° W
Elevation2326 m
Population≈ 1.2M
Air pressurebarometer.today

Sun & Daylight Hours in Arequipa

Sunrise / sunset05:19 / 17:45
Daylight today12h 26m
Daylight tomorrow12h 27m (+1 min)
Solar noon (sun highest)11:32
Golden hour17:16–17:58
Low UV hours (UV < 3)05:00–08:00
16:00–17:00
High UV window (UV ≥ 3)08:00–16:00

Seasonal daylight range at this latitude

Longest day13h 06m (Dec 21)
Shortest day11h 09m (Jun 21)

Similar daylight hours as Brasília, Brazil — on the same parallel

UV index map for Arequipa and nearby cities

This map shows the current UV forecast for Arequipa 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: Huancayo · Iquique · Cusco · Puno · Chincha Alta

Air quality concerns? Check air quality in Arequipa on AirIndex.Today

What is the UV index in Arequipa right now?

As of 18:00 local time, the UV index in Arequipa 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 Arequipa today?

On 2026-10-13, the peak UV index forecast for Arequipa is 17, expected around 11:00 local time. Check back daily: UV levels change with cloud cover, ozone, and sun angle. Arequipa sits at 2326 m elevation, where UV radiation is stronger than at sea level (roughly +10% per 1,000 m).

What is the UV index in Arequipa tomorrow?

On 2026-10-14, the UV index in Arequipa is forecast to peak at 17 around 11:00 local time. Plan outdoor activities and sun protection around that peak.

What are typical maximum UV levels in Arequipa by month?

Peak midday UV index in Arequipa, month by month
MonthPeak midday UV
January16–19
February16–19
March14–18
April11–15
May8–12
June7–9
July8–10
August9–13
September12–15
October14–17
November15–18
December16–18
The weakest sun is in June, when midday UV stays around 7–9. From there it climbs: July (8–10), August (9–13), September (12–15), October (14–17), November (15–18), and December (16–18). The strongest sun is in January and February, reaching 16–19 on clear days. It eases back through March (14–18), April (11–15), and May (8–12).Clear-sky range, 17 years of satellite data (2004–2020). On cloudy days values are typically lower.

How strong is UV in Arequipa in October?

In a typical October, the midday UV index in Arequipa reaches 14–17 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 Arequipa?

UV in Arequipa is highest in January–February, when the midday index reaches up to 19 on clear days. The weakest sun is in June, around 7–9 at midday.

When do you need sun protection in Arequipa?

All year round: midday UV in Arequipa reaches 3 or higher (the WHO protection level) in every month. In every month it can reach UV 8 or more. The WHO then advises extra protection: avoid the midday sun and cover up.

Forecast · UV Index

Now
UV 0 (Low)
Max today
UV 16.5 · 11:00
Max tomorrow
UV 16.7 · 11:00
Clear sky
UV 16.6
Sunrise / Sunset
05:19 / 17:45
High UV window (UV ≥ 3)
08:00–16:00
5-Day UV Forecast
Tue 16.5 · Wed 16.7 · Thu 16.3 · Fri 17.1 · Sat 16.7

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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