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Environment Canada
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Ozone and UV Index Forecast

The UV Index Forecast for selected Canadian sites is available from the Canadian Meteorological Centre at

Total Ozone Forecast Map for Canada

The total ozone forecast map and total ozone deviations forecast map are based on ozone forecasts provided by the Canadian Meteorological Centre. Total ozone values are given in Dobson Units. The numbers represent forecasts for ground-based total ozone measurement sites. Maps of deviations represent total ozone deviations from the 1978-1988 level estimated using TOMS data.

These maps are normally updated daily at about 1400 UTC. However, this near-real-time system is automated, so if a system problem occurs outside of regular working hours, it will not be fixed until the following work day.

Forecast total ozone Forecast deviation from normal