FPCN48 CWAO 191900 ULTRAVIOLET (UV) INDEX FORECAST FOR CANADIAN CITIES ISSUED BY ENVIRONMENT CANADA AT 3:00 P.M. EDT TUESDAY 19 AUGUST 2025 FOR TUESDAY. UV INDEX IS RELATED TO SKY CONDITIONS AND PRECIPITATIONS. UV INDEX WOULD BE HIGHER THAN STATED DURING SUNNY BREAKS OR IF WEATHER CONDITIONS IMPROVE. ALL TIMES ARE IN LOCAL TIME. TUESDAY LOCATION WEATHER FORECAST UV INDEX CATEGORY TIME ABOVE 3 RESOLUTE MAINLY CLOUDY 2 LOW NONE INUVIK PERIODS OF DRIZZLE 2 LOW NONE RANKIN INLET CHANCE OF SHOWERS 3 MODERATE 10 AM TO 3 PM YELLOWKNIFE CHANCE OF SHOWERS 3 MODERATE 11 AM TO 3 PM WHITEHORSE CHANCE OF SHOWERS 4 MODERATE 11 AM TO 4 PM VANCOUVER MAINLY CLOUDY 6 HIGH 9 AM TO 4 PM VICTORIA MAINLY CLOUDY 6 HIGH 9 AM TO 4 PM KAMLOOPS MAINLY CLOUDY 6 HIGH 9 AM TO 4 PM NANAIMO CHANCE OF SHOWERS 5 MODERATE 10 AM TO 4 PM PORT HARDY CHANCE OF SHOWERS 5 MODERATE 10 AM TO 4 PM PRINCE RUPERT CHANCE OF SHOWERS 4 MODERATE 11 AM TO 4 PM KELOWNA CHANCE OF SHOWERS 6 HIGH 9 AM TO 4 PM PRINCE GEORGE CHANCE OF SHOWERS 4 MODERATE 10 AM TO 3 PM CRANBROOK MAINLY SUNNY 7 HIGH 10 AM TO 5 PM CASTLEGAR A MIX OF SUN AND CLOUD 7 HIGH 10 AM TO 5 PM EDMONTON A MIX OF SUN AND CLOUD 6 HIGH 10 AM TO 4 PM CALGARY MAINLY SUNNY 7 HIGH 10 AM TO 5 PM LETHBRIDGE CHANCE OF SHOWERS 7 HIGH 9 AM TO 5 PM RED DEER MAINLY SUNNY 6 HIGH 10 AM TO 5 PM MEDICINE HAT CHANCE OF SHOWERS 7 HIGH 9 AM TO 5 PM BANFF CHANCE OF SHOWERS 6 HIGH 10 AM TO 4 PM GRANDE PRAIRIE CHANCE OF SHOWERS 5 MODERATE 10 AM TO 5 PM SASKATOON MAINLY SUNNY 7 HIGH 9 AM TO 4 PM REGINA MAINLY SUNNY 7 HIGH 9 AM TO 4 PM YORKTON A MIX OF SUN AND CLOUD 7 HIGH 9 AM TO 4 PM THOMPSON MAINLY SUNNY 5 MODERATE 10 AM TO 4 PM WINNIPEG CLEARING 7 HIGH 10 AM TO 5 PM THUNDER BAY SHOWERS OR DRIZZLE 5 MODERATE 10 AM TO 5 PM SUDBURY CHANCE OF SHOWERS 7 HIGH 10 AM TO 5 PM WINDSOR A FEW SHOWERS 4 MODERATE 11 AM TO 3 PM TORONTO A FEW SHOWERS 6 HIGH 9 AM TO 3 PM BARRIE SHOWERS 4 MODERATE 10 AM TO 3 PM LONDON A FEW SHOWERS 4 MODERATE 10 AM TO 3 PM OTTAWA A MIX OF SUN AND CLOUD 8 VERY HIGH 9 AM TO 4 PM KINGSTON CHANCE OF SHOWERS 7 HIGH 9 AM TO 4 PM MONTREAL MAINLY CLOUDY 8 VERY HIGH 9 AM TO 4 PM SHERBROOKE A MIX OF SUN AND CLOUD 8 VERY HIGH 9 AM TO 4 PM QUEBEC A MIX OF SUN AND CLOUD 8 VERY HIGH 9 AM TO 4 PM STE-ADELE A MIX OF SUN AND CLOUD 8 VERY HIGH 9 AM TO 4 PM FREDERICTON MAINLY SUNNY 7 HIGH 9 AM TO 5 PM SAINT JOHN NB MAINLY SUNNY 7 HIGH 9 AM TO 5 PM SYDNEY A MIX OF SUN AND CLOUD 7 HIGH 9 AM TO 4 PM HALIFAX MAINLY SUNNY 8 VERY HIGH 9 AM TO 5 PM CHARLOTTETOWN MAINLY SUNNY 7 HIGH 9 AM TO 4 PM ST. JOHN'S NF PERIODS OF RAIN 1 LOW NONE GOOSE BAY MAINLY SUNNY 5 MODERATE 9 AM TO 4 PM UV CATEGORIES UV INDEX RANGE (ROUNDED VALUES) EXTREME 11 OR HIGHER VERY HIGH 8 TO 10 HIGH 6 TO 7 MODERATE 3 TO 5 LOW 2 OR LESS FOR SUN PROTECTION TIPS YOU CAN VISIT ENVIRONMENT CANADA'S WEB SITE AT WWW.CANADA.CA/UV-INDEX.