How to find your UV index
If the maximum UV Index value for the day is expected to reach 1 or greater then it is also included in Environment Canada's daily weather forecast. The UV Index is also included in most radio, TV, newspaper and online weather forecasts.
Finding the UV Index on Canada’s weather web site
Start by finding the weather forecast page for your location. On this page, the UV Index is included in the text below the seven-day forecast and in the hourly forecast link.
Figure 1 Sample weather forecast
Long description
On the daily forecast found on the Environment and Climate Change Canada WeatherCAN web page, red circles on the chart show where to find the link to the UV index. You will see the hourly UV index forecast in the top bar. You will find the daily UV index forecast in the text below your selected region.
Summer UV values across North America
Typical summer values for the UV Index across North America show major changes from north to south. In general, the farther south you go, the higher the UV Index. This is why you burn so quickly on a southern vacation.
This table summarizes the typical early summer midday UV values for locations across North America - click to expand
| Location | UV Index |
|---|---|
| Tropics | 10 - 14 (very high to extreme) |
| Grand Canyon area, AZ | 11 (extreme) |
| Washington, DC | 9 (very high) |
| Toronto | 8 (very high) |
| Ottawa | 8 (very high) |
| Montreal | 8 (very high) |
| Halifax | 8 (very high) |
| Calgary | 8 (very high) |
| Whistler, BC | 8 (very high) |
| St. John's | 7 (high) |
| Vancouver | 7 (high) |
| Victoria | 7 (high) |
| Edmonton | 7 (high) |
| Winnipeg | 7 (high) |
| Yellowknife | 5 (moderate) |
| Iqaluit | 5 (moderate) |
| North Pole | 2 (low) |
Holiday travel and UV
Heading south for a holiday? Be careful - in the Caribbean, Mexico, Hawaii and other tropical destinations you are further south and the UV is stronger. On vacation you'll also likely wear fewer clothes and visit the beach, where UV reflects off the sand and the water.
If your vacation includes a winter climate, skiing and other outdoor winter fun can also increase your exposure to UV. Reflection off fresh snow nearly doubles UV, and if you are skiing in the mountains, you will receive more UV due to the elevation.
The UV Index is used in many countries around the world. Check the World Health Organization for a list of countries with the UV Index.
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