UV index for Jacksonville peaks at UV 6 at 12:00 local time. Data as of (America/New_York). Values update hourly — see this page for the current reading and hourly forecast.

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UV Index in Jacksonville

Live UV index for Jacksonville, United States — current level, hourly UV forecast, peak times, WHO sun protection advice and a 4-day outlook. Now: UV 0 (Low). Peak today: UV 6 at 12:00.

Now · 05:00 · Jacksonville
0
Low
0–2Low3–5Moderate6–7High8–10Very High11+Extreme

Sun protection needed today: 11:00–17:00

Protection guidelines:

Max today · 12:00 — UV 6 · High · Clear sky: 7 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 Jacksonville. WHO · Methodology
Today's UV overview · Fri, Oct 16
1
9Clear sky21°91%2
2
10Clear sky23°84%2
4
11Clear sky26°74%2
6
12Clear sky27°63%2
6
13Clear sky28°57%2
4
14Clear sky28°54%3
4
15Clear sky28°54%3
3
16Clear sky28°53%2
1
17Overcast27°57%2
% HumidityWind m/s
Max today
6at 12:00
Max tomorrow
4at 15:00
Daylight today
11h 25m07:29–18:54
Solar noon
13:12

Sun & moon in Jacksonville

Sun height-27°
Sun directionE 84°
Sky stateNight
-90°-60°-30°0°30°60°90°00:0006:0012:0018:0024:00Now -27°

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 260°
Civil twilight07:05–07:29 / 18:54–19:18
Nautical twilight06:37–07:05 / 19:18–19:46
Astronomical twilight06:09–06:37 / 19:46–20:14
Moon phaseWaxing crescent · 29%
Moonrise / moonset13:06 / 23:04
Next moon quarterFirst quarter · Oct 18, 12:13

Detailed hourly UV index — Today, Oct 16

Peak UV 6.1 at 12:00 · Jacksonville · Local time (EDT)

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: 06:0020°9:0021°12:0027°15:0028°18:0027°21:0024°
ForecastClear sky

Detailed hourly UV index — Tomorrow, Oct 17

Peak UV 3.6 at 15:00 · Jacksonville · Local time (EDT)

0246Max: 46:0022°9:0018°12:0019°15:0017°18:0017°21:0015°
ForecastClear sky
Hour-by-hour UV index for today & tomorrow

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

Today — Oct 16

HourUVClear skyWeather
05:000.0 – Low0.0Clear sky20°
06:000.0 – Low0.0Clear sky20°
07:000.0 – Low0.0Clear sky19°
08:000.2 – Low0.2Clear sky19°
09:000.9 – Low0.9Clear sky21°
10:002.5 – Low2.5Clear sky23°
11:004.5 – Moderate4.5Clear sky26°
12:006.1 – High6.1Clear sky27°
13:005.9 – High6.8Clear sky28°
14:003.9 – Moderate6.2Clear sky28°
15:004.3 – Moderate4.7Clear sky28°
16:002.6 – Moderate2.7Clear sky28°
17:001.0 – Low1.1Overcast27°
18:000.2 – Low0.2Overcast27°
19:000.0 – Low0.0Partly cloudy25°
20:000.0 – Low0.0Overcast25°
21:000.0 – Low0.0Partly cloudy24°

Tomorrow — Oct 17

HourUVClear skyWeather
05:000.0 – Low0.0Overcast22°
06:000.0 – Low0.0Overcast22°
07:000.0 – Low0.0Overcast20°
08:000.1 – Low0.2Overcast18°
09:000.3 – Low0.9Overcast18°
10:000.6 – Low2.3Overcast17°
11:000.9 – Low4.2Overcast17°
12:001.1 – Low5.9Overcast19°
13:001.3 – Low6.6Overcast18°
14:002.3 – Low6.0Overcast16°
15:003.6 – Moderate4.4Overcast17°
16:002.4 – Low2.5Mainly clear19°
17:001.0 – Low1.0Overcast18°
18:000.2 – Low0.2Mainly clear17°
19:000.0 – Low0.0Clear sky16°
20:000.0 – Low0.0Clear sky15°
21:000.0 – Low0.0Clear sky15°

4-Day UV Forecast for Jacksonville

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 6 at 12:00Sun protection: 11:00–17:0028° / 19°
6Clear sky20°9Clear sky21°12Clear sky27°15Clear sky28°18Overcast27°
Saturday, Oct 17Peak UV 4 at 15:00Sun protection: 15:00–16:0023° / 13°
6Overcast22°9Overcast18°12Overcast19°15Overcast17°18Mainly clear17°
Sunday, Oct 18Peak UV 3 at 13:00Sun protection: 13:00–16:0020° / 15°
6Overcast16°9Overcast15°12Overcast20°15Mainly clear20°18Clear sky18°
Monday, Oct 19Peak UV 5 at 14:00Sun protection: 11:00–16:0022° / 13°
6Overcast14°9Mainly clear14°12Mainly clear19°15Clear sky22°18Clear sky20°

Peak midday UV by month in Jacksonville

It's October: on clear days, the midday sun here usually peaks around UV 5–8. 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 4, 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.

368113–5Jan4–7Feb6–9Mar8–11Apr9–11May10–12Jun10–12Jul9–11Aug7–10Sep5–8Oct3–6Nov3–4Dec

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 12
Weakest sunDec · up to 4
Protection needed (UV 3+)all year
Extra protection (UV 8+)Mar–Oct

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

See also: Jacksonville temperature and rainfall by month →

UV in Jacksonville: today, tomorrow and through the year

In Jacksonville, the UV index reads 0 (low) right now, and the day tops out at 6 (high) around 12:00, so it's worth covering up between 11:00 and 17:00. The sky is clear today, with little cloud to soften the sun.Tomorrow eases off, with the peak down to UV 4 (moderate) around 15:00, though protection still matters from 15:00 to 16:00.Across the year, October comes after the UV high in Jacksonville, and levels are easing back towards the quietest months.

Location, daylight and sky in Jacksonville

Key facts

CountryUnited States, Florida
TimezoneAmerica/New York (UTC-4)
Coordinates30.33° N, 81.66° W
Elevation12 m
Population≈ 1.01M
Air pressurebarometer.today

Sun & Daylight Hours in Jacksonville

Sunrise / sunset07:29 / 18:54
Daylight today11h 25m
Daylight tomorrow11h 23m (-2 min)
Solar noon (sun highest)13:12
Golden hour18:21–19:09
Low UV hours (UV < 3)07:00–11:00
17:00–18:00
High UV window (UV ≥ 3)11:00–17:00

Seasonal daylight range at this latitude

Longest day14h 06m (Jun 21)
Shortest day10h 11m (Dec 21)

Similar daylight hours as Cairo, Egypt — on the same parallel

UV index map for Jacksonville and nearby cities

This map shows the current UV forecast for Jacksonville 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: Brandon · Port Saint Lucie · Pompano Beach · Orlando · Palm Bay

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

What is the UV index in Jacksonville right now?

As of 05:00 local time, the UV index in Jacksonville 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 Jacksonville today?

On 2026-10-16, the peak UV index forecast for Jacksonville is 6, 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 Jacksonville tomorrow?

On 2026-10-17, the UV index in Jacksonville is forecast to peak at 4 around 15:00 local time. Plan outdoor activities and sun protection around that peak.

What are typical maximum UV levels in Jacksonville by month?

Peak midday UV index in Jacksonville, month by month
MonthPeak midday UV
January3–5
February4–7
March6–9
April8–11
May9–11
June10–12
July10–12
August9–11
September7–10
October5–8
November3–6
December3–4
The weakest sun is in December, when midday UV stays around 3–4. From there it climbs: January (3–5), February (4–7), March (6–9), April (8–11), and May (9–11). The strongest sun is in June and July, reaching 10–12 on clear days. It eases back through August (9–11), September (7–10), October (5–8), and November (3–6).Clear-sky range, 17 years of satellite data (2004–2020). On cloudy days values are typically lower.

How strong is UV in Jacksonville in October?

In a typical October, the midday UV index in Jacksonville reaches 5–8 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 Jacksonville?

UV in Jacksonville is highest in June–July, when the midday index reaches up to 12 on clear days. The weakest sun is in December, around 3–4 at midday.

When do you need sun protection in Jacksonville?

All year round: midday UV in Jacksonville reaches 3 or higher (the WHO protection level) in every month. In March–October 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 6.1 · 12:00
Max tomorrow
UV 3.6 · 15:00
Clear sky
UV 6.8
Sunrise / Sunset
07:29 / 18:54
High UV window (UV ≥ 3)
11:00–17:00
4-Day UV Forecast
Fri 6.1 · Sat 3.6 · Sun 2.6 · Mon 4.7

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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