UV Index Forecast

 Clear sky UV Index and Ozone Column (DU) © KNMI/ESA
Today
August
22
Friday
August
23
Saturday
August
24
Sunday
August
25
Monday
August
26
Tuesday
August
27
Wednesday

UV Index UV Index UV Index UV Index UV Index UV Index
6.0 5.7 5.6 6.1 6.0 6.2 n/a
 HIGH   Moderate   Moderate   HIGH   HIGH   HIGH 
303.2 DU 312.1 DU 312.5 DU 290.1 DU 290.7 DU 280.6 DU n/a
UV forecast courtesy of and Copyright © KNMI/ESA (http://www.temis.nl/)
Used with permission
This table returns the forecast of the UV index and the total ozone column (DU) at the solar noon of today and of the coming  6  days, for clear-sky conditions and in the absence of snow. The forecasts are based on assimilated SCIAMACHY data.

UV Index Scale
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The UV Index

UV Index Description Sun Protection Actions
1 - 2 Low
  • Minimal sun protection required for normal activity
  • Wear sunglasses on bright days. If outside for more than one hour, cover up and use sunscreen
  • Reflection off snow can nearly double UV strength. Wear sunglasses and apply sunscreen
3 - 5 Moderate
  • Take precautions -- cover up, wear a hat, sunglasses and sunscreen -- especially if you will be outside for 30 minutes or more
  • Look for shade near midday when the sun is strongest
6 - 7 High
  • Protection required -- UV damages the skin and can cause sunburn
  • Reduce time in the sun between 11 a.m. and 4 p.m. and take full precautions -- seek shade, cover up, wear a hat, sunglasses and sunscreen
8 - 10 Very High
  • Extra precautions required -- unprotected skin will be damaged and can burn quickly
  • Avoid the sun between 11 a.m. and 4 p.m. and take full precautions -- seek shade, cover up, wear a hat, sunglasses and sunscreen
11 + Extreme
  • Values of 11 or more are very rare in Canada. However, the UV Index can reach 14 or more in the tropics and southern U.S.
  • Take full precautions. Unprotected skin will be damaged and can burn in minutes. Avoid the sun between 11 a.m. and 4 p.m., cover up, wear a hat, sunglasses and sunscreen
  • White sand and other bright surfaces reflect UV and increase UV exposure
UV Index and Sun Protection