UV index for Asunción peaks at UV 11 at 12:00 local time. Data as of (America/Asuncion). Values update hourly — see this page for the current reading and hourly forecast.

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UV Index in Asunción

Live UV index for Asunción, Paraguay — current level, hourly UV forecast, peak times, WHO sun protection advice and a 4-day outlook. Now: UV 0 (Low). Peak today: UV 11 at 12:00.

Now · 04:00 · Asunción
0
Low
0–2Low3–5Moderate6–7High8–10Very High11+Extreme

Sun protection needed today: 09:00–17:00

Protection guidelines:

Max today · 12:00 — UV 11 · Extreme · Clear sky: 11 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 Asunción. WHO · Methodology
Today's UV overview · Fri, Oct 16
1
8Overcast17°86%3
4
9Partly cloudy19°81%3
7
10Partly cloudy20°77%3
9
11Partly cloudy22°68%4
11
12Partly cloudy23°60%4
10
13Mainly clear24°54%4
8
14Partly cloudy25°48%4
5
15Partly cloudy25°47%4
3
16Partly cloudy25°46%4
1
17Mainly clear24°47%4
% HumidityWind m/s
Max today
11at 12:00
Max tomorrow
4at 13:00
Daylight today
12h 42m06:15–18:57
Solar noon
12:36

Sun & moon in Asunción

Sun height-20°
Sun directionE 111°
Sky stateNight
-90°-60°-30°0°30°60°90°00:0006:0012:0018:0024:00Now -20°

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 100° / W 259°
Civil twilight05:52–06:15 / 18:57–19:20
Nautical twilight05:24–05:52 / 19:20–19:48
Astronomical twilight04:56–05:24 / 19:48–20:15
Moon phaseWaxing crescent · 29%
Moonrise / moonset10:13 / —
Next moon quarterFirst quarter · Oct 18, 13:13

Detailed hourly UV index — Today, Oct 16

Peak UV 10.7 at 12:00 · Asunción · Local time (GMT-3)

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.

048Max: 116:0016°9:0019°12:0023°15:0025°18:0023°21:0018°
ForecastClear sky

Detailed hourly UV index — Tomorrow, Oct 17

Peak UV 4.2 at 13:00 · Asunción · Local time (GMT-3)

04812Max: 46:0015°9:0018°12:0022°15:0023°18:0021°21:0016°
ForecastClear sky
Hour-by-hour UV index for today & tomorrow

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

Today — Oct 16

HourUVClear skyWeather
05:000.0 – Low0.0Overcast17°
06:000.0 – Low0.0Overcast16°
07:000.3 – Low0.3Overcast16°
08:001.3 – Low1.4Overcast17°
09:003.6 – Moderate3.7Partly cloudy19°
10:006.6 – High6.6Partly cloudy20°
11:009.3 – Very High9.3Partly cloudy22°
12:0010.7 – Extreme11.0Partly cloudy23°
13:0010.0 – Very High10.9Mainly clear24°
14:007.7 – Very High9.2Partly cloudy25°
15:005.2 – Moderate6.4Partly cloudy25°
16:003.0 – Moderate3.5Partly cloudy25°
17:001.2 – Low1.3Mainly clear24°
18:000.3 – Low0.3Partly cloudy23°
19:000.0 – Low0.0Mainly clear21°
20:000.0 – Low0.0Clear sky19°
21:000.0 – Low0.0Clear sky18°

Tomorrow — Oct 17

HourUVClear skyWeather
05:000.0 – Low0.0Partly cloudy16°
06:000.0 – Low0.0Overcast15°
07:000.2 – Low0.3Partly cloudy15°
08:000.5 – Low1.5Partly cloudy17°
09:001.5 – Low3.7Partly cloudy18°
10:002.7 – Moderate6.7Partly cloudy19°
11:002.3 – Low9.5Partly cloudy21°
12:004.0 – Moderate11.1Partly cloudy22°
13:004.2 – Moderate11.0Partly cloudy23°
14:004.0 – Moderate9.3Partly cloudy23°
15:003.4 – Moderate6.4Partly cloudy23°
16:002.3 – Low3.5Overcast23°
17:001.0 – Low1.3Partly cloudy22°
18:000.2 – Low0.3Overcast21°
19:000.0 – Low0.0Partly cloudy19°
20:000.0 – Low0.0Mainly clear18°
21:000.0 – Low0.0Mainly clear16°

4-Day UV Forecast for Asunción

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 11 at 12:00Sun protection: 09:00–17:0025° / 16°
6Overcast16°9Partly cloudy19°12Partly cloudy23°15Partly cloudy25°18Partly cloudy23°
Saturday, Oct 17Peak UV 4 at 13:00Sun protection: 10:00–16:0023° / 15°
6Overcast15°9Partly cloudy18°12Partly cloudy22°15Partly cloudy23°18Overcast21°
Sunday, Oct 18Peak UV 11 at 12:00Sun protection: 09:00–17:0022° / 12°
6Partly cloudy12°9Partly cloudy16°12Mainly clear21°15Mainly clear22°18Mainly clear21°
Monday, Oct 19Peak UV 11 at 12:00Sun protection: 09:00–17:0022° / 14°
6Overcast14°9Overcast16°12Overcast19°15Partly cloudy22°18Mainly clear21°

Peak midday UV by month in Asunción

It's October: on clear days, the midday sun here usually peaks around UV 10–13. 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 5, 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.

368111413–16Jan12–15Feb9–14Mar6–10Apr4–7May4–5Jun4–6Jul5–8Aug7–11Sep10–13Oct12–15Nov13–16Dec

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 sunDec–Jan · up to 16
Weakest sunJun · up to 5
Protection needed (UV 3+)all year
Extra protection (UV 8+)Aug–Apr

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

See also: Asunción temperature and rainfall by month →

UV in Asunción: today, tomorrow and through the year

In Asunción, the UV index reads 0 (low) right now, and the day tops out at 11 (extreme) around 12:00, so it's worth covering up between 09:00 and 17:00. Under clear skies, UV climbs close to its full strength.Tomorrow eases off, with the peak down to UV 4 (moderate) around 13:00, though protection still matters from 10:00 to 16:00. Sunnier days with stronger UV are on the way later in the week.Across the year, UV in Asunción is on the way up in October, with the strongest months still ahead.

Location, daylight and sky in Asunción

Key facts

CountryParaguay, Asuncion
TimezoneAmerica/Asuncion (UTC-3)
Coordinates25.29° S, 57.65° W
Elevation116 m
Population≈ 1.48M
Air pressurebarometer.today

Sun & Daylight Hours in Asunción

Sunrise / sunset06:15 / 18:57
Daylight today12h 42m
Daylight tomorrow12h 43m (+1 min)
Solar noon (sun highest)12:36
Golden hour18:26–19:11
Low UV hours (UV < 3)06:00–09:00
17:00–18:00
High UV window (UV ≥ 3)09:00–17:00

Seasonal daylight range at this latitude

Longest day13h 43m (Dec 21)
Shortest day10h 34m (Jun 21)

Similar daylight hours as Johannesburg, South Africa — on the same parallel

UV index map for Asunción and nearby cities

This map shows the current UV forecast for Asunción 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: Ciudad del Este · Foz do Iguaçu · Posadas · Umuarama · Campo Grande

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

What is the UV index in Asunción right now?

As of 04:00 local time, the UV index in Asunción 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 Asunción today?

On 2026-10-16, the peak UV index forecast for Asunción is 11, 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 Asunción tomorrow?

On 2026-10-17, the UV index in Asunción is forecast to peak at 4 around 13:00 local time. Plan outdoor activities and sun protection around that peak.

What are typical maximum UV levels in Asunción by month?

Peak midday UV index in Asunción, month by month
MonthPeak midday UV
January13–16
February12–15
March9–14
April6–10
May4–7
June4–5
July4–6
August5–8
September7–11
October10–13
November12–15
December13–16
The weakest sun is in June, when midday UV stays around 4–5. From there it climbs: July (4–6), August (5–8), September (7–11), October (10–13), and November (12–15). The strongest sun is in December and January, reaching 13–16 on clear days. It eases back through February (12–15), March (9–14), April (6–10), and May (4–7).Clear-sky range, 17 years of satellite data (2004–2020). On cloudy days values are typically lower.

How strong is UV in Asunción in October?

In a typical October, the midday UV index in Asunción reaches 10–13 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 Asunción?

UV in Asunción is highest in December–January, when the midday index reaches up to 16 on clear days. The weakest sun is in June, around 4–5 at midday.

When do you need sun protection in Asunción?

All year round: midday UV in Asunción reaches 3 or higher (the WHO protection level) in every month. In August–April 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 10.7 · 12:00
Max tomorrow
UV 4.2 · 13:00
Clear sky
UV 11
Sunrise / Sunset
06:15 / 18:57
High UV window (UV ≥ 3)
09:00–17:00
4-Day UV Forecast
Fri 10.7 · Sat 4.2 · Sun 10.9 · Mon 11.4

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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