How to get your UV Index

Looking for your Ultraviolet (UV) Index forecast on a hot summer day? They are available in a daily bulletin format, with values greater than 0 to 11+ being reported for 48 locations across Canada.

If the UV Index forecast indicates that the maximum UV Index value for the day is expected to reach 3 or greater then it is also included in Environment Canada's local daily weather forecast.

Environment Canada issues local weather forecasts three times daily at 5:00 a.m., 11:00 a.m. and 4:00 p.m. (local time). Daily local weather forecasts can be retrieved for Canadian locations at www.weather.gc.ca .

How to get your UV Forecast from the daily weather forecast

When you go to Environment Canada's weather.gc.ca website, you will find a "Forecast Quick Link" menu bar at the top right hand corner of the page with drop down arrows.

Note: this is not a working link - it is an example
Screen shot of the Forecast Quick Link navigation toolbar used on Environment Canada’s weather.gc.ca web site. This toolbar provides quick access to all weather forecast location pages.

Use the drop down arrows to select your province/region and your city or location. Then click the "Go" button. This will take you to your "City Page".

On your City Page, you will first see the "Current Conditions" Box. Under this, you will find the "Forecast" Box. The Current Conditions Box contains actual hourly meteorological observations. The UV index is a forecast meteorological parameter, and as a result it is found in the forecast section of the City Page.

You will find the maximum UV forecast for the day in the text beside the word Today (for today's forecast). An example of what this looks like is shown below. The red arrows show you where to look for the daily UV maximum forecast value.

Sample of where to find UV forecast on Weather.gc.ca city page.

In addition, Environment Canada provides a Seasonal UV Outlook that is issued at the beginning of April each year for the late spring and summer seasons. It is during this time period that UV values are at their maximum levels in Canada, and Canadians are at greatest risk from the harmful effects of UV radiation.

Environment Canada also provides a chart of typical summer midday UV values for various Canadian and U.S. locations, and a list of websites where you can check for international UV forecast values if you are planning on travelling.