UV index for Lima peaks at UV 12 at 12:00 local time. Data as of (America/Lima). Values update hourly — see this page for the current reading and hourly forecast.

uvi·today

UV Index in Lima

Live UV index for Lima, Peru — current level, hourly UV forecast, peak times, WHO sun protection advice and a 4-day outlook. Now: UV 0 (Low). Peak today: UV 12 at 12:00.

Now · 03:00 · Lima
0
Low
0–2Low3–5Moderate6–7High8–10Very High11+Extreme

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

Protection guidelines:

Max today · 12:00 — UV 12 · Extreme · Clear sky: 14 at 12:00

  • 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 Lima. WHO · Methodology
Today's UV overview · Fri, Oct 16
1
7Overcast21°89%1
3
8Overcast22°81%1
5
9Overcast24°70%2
9
10Partly cloudy26°63%3
11
11Partly cloudy27°58%4
12
12Mainly clear27°56%4
11
13Mainly clear27°57%4
8
14Partly cloudy27°59%4
5
15Partly cloudy26°61%3
2
16Partly cloudy26°63%3
% HumidityWind m/s
Max today
12at 12:00
Max tomorrow
9at 11:00
Daylight today
12h 23m05:42–18:05
Solar noon
11:54

Sun & moon in Lima

Sun height-34°
Sun directionE 110°
Sky stateNight
-90°-60°-30°0°30°60°90°00:0006:0012:0018:0024:00Now -34°

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 99° / W 260°
Civil twilight05:21–05:42 / 18:04–18:26
Nautical twilight04:56–05:21 / 18:26–18:51
Astronomical twilight04:30–04:56 / 18:51–19:16
Moon phaseWaxing crescent · 29%
Moonrise / moonset10:07 / 23:24
Next moon quarterFirst quarter · Oct 18, 11:13

Detailed hourly UV index — Today, Oct 16

Peak UV 12.4 at 12:00 · Lima · 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.

04812Max: 126:0020°9:0024°12:0027°15:0026°18:0023°21:0022°
ForecastClear sky

Detailed hourly UV index — Tomorrow, Oct 17

Peak UV 9.1 at 11:00 · Lima · Local time (GMT-5)

04812Max: 96:0021°9:0024°12:0027°15:0027°18:0024°21:0022°
ForecastClear sky
Hour-by-hour UV index for today & tomorrow

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

Today — Oct 16

HourUVClear skyWeather
05:000.0 – Low0.0Overcast20°
06:000.1 – Low0.1Overcast20°
07:000.8 – Low1.0Overcast21°
08:002.5 – Moderate3.3Overcast22°
09:005.1 – Moderate6.9Overcast24°
10:008.5 – Very High10.7Partly cloudy26°
11:0011.4 – Extreme13.4Partly cloudy27°
12:0012.4 – Extreme14.0Mainly clear27°
13:0011.1 – Extreme12.3Mainly clear27°
14:008.2 – Very High9.0Partly cloudy27°
15:004.8 – Moderate5.1Partly cloudy26°
16:002.0 – Low2.0Partly cloudy26°
17:000.4 – Low0.4Partly cloudy24°
18:000.0 – Low0.0Overcast23°
19:000.0 – Low0.0Overcast22°
20:000.0 – Low0.0Overcast22°
21:000.0 – Low0.0Overcast22°

Tomorrow — Oct 17

HourUVClear skyWeather
05:000.0 – Low0.0Overcast21°
06:000.1 – Low0.1Overcast21°
07:000.6 – Low0.9Overcast21°
08:002.1 – Low3.2Overcast23°
09:004.4 – Moderate6.6Overcast24°
10:007.2 – High10.1Partly cloudy26°
11:009.1 – Very High12.7Mainly clear27°
12:008.9 – Very High13.4Mainly clear27°
13:008.9 – Very High11.8Partly cloudy27°
14:007.6 – Very High8.6Mainly clear27°
15:004.3 – Moderate4.9Mainly clear27°
16:001.8 – Low2.0Mainly clear26°
17:000.4 – Low0.4Mainly clear25°
18:000.0 – Low0.0Partly cloudy24°
19:000.0 – Low0.0Partly cloudy23°
20:000.0 – Low0.0Partly cloudy22°
21:000.0 – Low0.0Mainly clear22°

4-Day UV Forecast for Lima

The 4-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 16Peak UV 12 at 12:00Sun protection: 08:00–16:0027° / 20°
6Overcast20°9Overcast24°12Mainly clear27°15Partly cloudy26°18Overcast23°
Saturday, Oct 17Peak UV 9 at 11:00Sun protection: 09:00–16:0027° / 21°
6Overcast21°9Overcast24°12Mainly clear27°15Mainly clear27°18Partly cloudy24°
Sunday, Oct 18Peak UV 12 at 12:00Sun protection: 08:00–16:0028° / 20°
6Overcast21°9Overcast24°12Mainly clear28°15Partly cloudy28°18Overcast24°
Monday, Oct 19Peak UV 6 at 10:00Sun protection: 08:00–15:0028° / 21°
6Overcast21°9Partly cloudy26°12Mainly clear28°15Partly cloudy27°18Overcast24°

Peak midday UV by month in Lima

It's October: on clear days, the midday sun here usually peaks around UV 14–16. 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.

36811141714–16Jan14–16Feb13–16Mar11–14Apr9–11May8–9Jun8–10Jul10–13Aug12–15Sep14–16Oct14–16Nov13–15Dec

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–Mar, Oct–Nov · up to 16
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.

See also: Lima temperature and rainfall by month →

UV in Lima: today, tomorrow and through the year

In Lima, the UV index reads 0 (low) right now, and the day tops out at 12 (extreme) around 12:00, so it's worth covering up between 08:00 and 16:00. The sky is clear today, with little cloud to soften the sun.UV backs down tomorrow, peaking near UV 9 (very high) around 11:00, but the hours from 09:00 to 16:00 still call for protection.Across the year, October sits near the top of the UV range in Lima: its strongest days reach about UV 16, and even the quietest months stay around UV 9.

About Lima

Lima is Peru's sprawling capital, spread across a coastal desert where the Rímac, Chillón and Lurín rivers run down to the Pacific. Despite its tropical latitude, the city stays cloudy for much of the year, since the cold Humboldt Current sustains a persistent low overcast. When that cloud clears the tropical sun is fierce: clear-sky readings reach 16 in October and November and again from January to March, and stay at 11 or above from August to May.

Sources:Wikipedia: LimaRadiation: The ultraviolet (UV) indexTEMIS UV index climatology, 2004–2020 (satellite-derived clear-sky)

Location, daylight and sky in Lima

Key facts

CountryPeru, Lima Province
TimezoneAmerica/Lima (UTC-5)
Coordinates12.04° S, 77.03° W
Elevation152 m
Population≈ 7.74M
Air pressurebarometer.today

Sun & Daylight Hours in Lima

Sunrise / sunset05:42 / 18:05
Daylight today12h 23m
Daylight tomorrow12h 24m (+1 min)
Solar noon (sun highest)11:54
Golden hour17:36–18:18
Low UV hours (UV < 3)05:00–08:00
16:00–18:00
High UV window (UV ≥ 3)08:00–16:00

Seasonal daylight range at this latitude

Longest day12h 50m (Dec 21)
Shortest day11h 25m (Jun 21)

UV index map for Lima and nearby cities

This map shows the current UV forecast for Lima 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: La Paz · Huancayo · Rio Branco · Guayaquil · Callao

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

What is the UV index in Lima right now?

As of 03:00 local time, the UV index in Lima 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 Lima today?

On 2026-10-16, the peak UV index forecast for Lima is 12, expected around 12:00 local time. Check back daily: UV levels change with cloud cover, ozone, and sun angle.

What is the UV index in Lima tomorrow?

On 2026-10-17, the UV index in Lima is forecast to peak at 9 around 11:00 local time. Plan outdoor activities and sun protection around that peak.

What are typical maximum UV levels in Lima by month?

Peak midday UV index in Lima, month by month
MonthPeak midday UV
January14–16
February14–16
March13–16
April11–14
May9–11
June8–9
July8–10
August10–13
September12–15
October14–16
November14–16
December13–15
Over the year, midday UV in Lima runs from about 9 in June up to about 16 in February. Month by month: January (14–16), February (14–16), March (13–16), April (11–14), May (9–11), June (8–9), July (8–10), August (10–13), September (12–15), October (14–16), November (14–16), and December (13–15).Clear-sky range, 17 years of satellite data (2004–2020). On cloudy days values are typically lower.

How strong is UV in Lima in October?

In a typical October, the midday UV index in Lima reaches 14–16 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 Lima?

UV in Lima is highest in January–March, October–November, when the midday index reaches up to 16 on clear days. The weakest sun is in June, around 8–9 at midday.

When do you need sun protection in Lima?

All year round: midday UV in Lima 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 12.4 · 12:00
Max tomorrow
UV 9.1 · 11:00
Clear sky
UV 14
Sunrise / Sunset
05:42 / 18:05
High UV window (UV ≥ 3)
08:00–16:00
4-Day UV Forecast
Fri 12.4 · Sat 9.1 · Sun 12.2 · Mon 6.2

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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