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What is the UV Index for Denver Colorado today?

What is the UV Index for Denver Colorado today?

The peak UV intensity in Denver over the next five days will be 7.4 on Friday, September 16th at 1:00 pm.

Tuesday, September 13th (Today) – Denver UV Index Forecast.

Time UV Index Risk
10am 3.4 Moderate
11am 5.4 Moderate
12pm 7 High
1pm 7.3 High

At what hour is the UV Index highest?

solar noon

The maximum UV level on any given day occurs during the four-hour period between 10 a.m. and 2 p.m., a timeframe scientists refer to as ‘solar noon. ‘ When the UV Index is featured in news and/or weather reports, it’s typically used to forecast the maximum UV levels for the following day for a specific region.

Why is the UV Index so high in Colorado?

Beyond the sunny days, we also see higher UV indexes due to our altitude. According to the EPA, altitude affects radiation through increasing about 2% every 1,00-foot increase. This is due to thinner air.

What time of day is UV Index lowest?

UV radiation is usually strongest for a few hours around noon and less strong during the early morning and the late afternoon/evening (see Figure 1).

Where on earth would you go for the highest possible UV index and why would the UV index be so high?

Peak UV should occur within the tropics (high sun, low ozone), at a high altitude site, in the Southern Hemisphere. Near the Tropic of Capricorn, overhead Sun occurs during the period when the Earth- Sun separation is a minimum.

How is UV calculated?

The strength of UV radiation is calculated for several wavelengths between 280 and 400 nm, the full spectrum of UVB (280-314 nm) and UVA (315-400 nm) radiation. Ozone in the atmosphere absorbs (attenuates) shorter UV wavelengths more strongly than longer wavelengths.
Calculating the UV Index.

Wavelength Strength
320nm 26
400nm 30

How long should I tan in UV 5?

Example of UV Index Forecast

UV Index Number Exposure Level Time to Burn
5 Moderate 45 minutes
6 High 30 minutes
8 Very High 15-25 minutes

How fast do you tan in UV 4?


3-5 6-7
Skin type III: Occasionally burn, slowly tan 20-30 min. 15-20 min.
Skin type IV: Rarely burn, rapidly tan 30-40 min. 20-30 min.
Skin type V & VI: Very rarely burn, always dark 40-60 min. 30-40 min.

Is the sun stronger in Denver?

So some people have asked, “Well, is the sun really stronger in Colorado than it is in Los Angeles?” And the answer is absolutely! The higher up in altitude that you get, the stronger the sun becomes.

Do you tan faster in Colorado?

This makes a big difference when you consider that for every 1,000′ you gain in elevation, the sun’s rays can intensify by around 4%. This means that compared to sea level, Colorado’s UV exposure can be around 20% higher on average–and more if you are on a 14er. Protect your skin: Wear SPF every day.

How fast do you tan in UV 5?

Example of UV Index Forecast

UV Index Number Exposure Level Time to Burn
4 Moderate 45 minutes
6 High 30 minutes

Do you need sunscreen after 5pm?

Early Morning and Evening Sun
However, the sun still emits UV rays outside of peak daylight hours, even as early as 6-8 a.m. and as late as 4-6 p.m. That means you still need to wear sunscreen in the early morning and evening hours to protect your skin from the damaging effects of the sun.

What city has the highest UV index?

Los Angeles is the most polluted city with one of the highest UV ray levels. Jackson, Mississippi; Phoenix, Arizona; and Houston, Despite New York City making the cut as the third healthiest location for skin, it tanks when it comes to stress levels.

Can you get Vitamin D from the sun after 4pm?

As an example, someone who burns easily in the sun (skin type 1 or 2) may only need 5 minutes of sun exposure each day before 11am and after 4pm (to the face, hands and forearms) to achieve adequate vitamin D levels whereas someone who tans more easily or has darker skin (skin type 5 or 6) will need more time e.g., up …

Which city has the highest UV index?

Is UV index 10 good for tanning?

It is important to remember that, in practice, no UV index is truly good for tanning. The NHS warns that a “healthy tan” does not really exist, spending long periods of time in direct sunlight is not recommended, no matter the UV index value, as any tan can increase the risk of developing skin cancer.

Can I tan in UV 5?

Can you tan with UV index of 5? The extent to which you tan in any weather or UV exposure is dependent on your skin type, and this varies from person to person. However, for the average person, it is possible to tan whilst exposed to moderate UV levels (index 3-5), and these are the safest conditions to tan in.

Why is sun so strong in Denver?

The higher up in altitude that you get, the stronger the sun becomes. And so Colorado, you know we’re probably somewhere around 20 to maybe 35 percent stronger sun, or stronger UV radiation than what you have at sea-level. Also the air is more dry here. We tend not to have as many clouds.

Is the sun brighter in Denver?

So when you land in Denver at just over 5,000 feet, the sun is already 30% stronger than it is at sea level. But by the time you’re on the mountain skiing at altitudes of over 10,000 feet, the sun’s intensity increases by 60%.

What is the lowest UV for tanning?

Can you tan with a UV index of 1? The lowest UV index possible during daylight hours is 1. In fact, both UV ratings of 1 and 2 are considered ‘low’ exposure. The US Environmental Protection Agency tells us at this strength of UV light there is ‘No protection needed.

Can you get sunburn at 7pm?

A common misconception about sunscreen is that you should only be applying and reapplying it when the sun is out and high in the sky. If you’re wondering whether you can get sunburn into the late afternoon or evening hours, the simple answer is yes.

What time of day is worst for sunburn?

The signs of a sunburn may not appear for a few hours. It is typically at its worst at 24 to 36 hours after sun exposure and resolves in 3 to 5 days. Ultraviolet rays can also initially cause invisible damage to the skin. Excessive and/or multiple sunburns cause premature aging of the skin and lead to skin cancer.

What city has lowest UV index?

Manchester, New Hampshire comes out on top with the lowest pollution level and UV ray index, rendering it the healthiest city to live in for your skin. Manchester is followed by Burlington, Vermont; New York City, New York; Anchorage, Alaska; and Fargo, North Dakota.

What state has the lowest UV index?

Alaska and the District of Columbia had the lowest, with 88% of all cases.

Can you get vitamin D through clothes?

This is not true, as the only way to trigger the chemical reaction that results in vitamin D production is for sunlight to reach your skin directly. Wearing clothes, or even sunscreen for that matter, blocks the sun’s UV rays and limits vitamin D production.