FPCN48 CWAO 200300 ULTRAVIOLET (UV) INDEX FORECAST FOR CANADIAN CITIES ISSUED BY ENVIRONMENT CANADA AT 11:00 P.M. EDT TUESDAY 19 AUGUST 2025 FOR WEDNESDAY. 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. WEDNESDAY LOCATION WEATHER FORECAST UV INDEX CATEGORY TIME ABOVE 3 RESOLUTE PERIODS OF RAIN 1 LOW NONE INUVIK CHANCE OF SHOWERS 2 LOW NONE RANKIN INLET CHANCE OF SHOWERS 4 MODERATE 10 AM TO 3 PM YELLOWKNIFE MAINLY SUNNY 4 MODERATE 11 AM TO 4 PM WHITEHORSE CHANCE OF SHOWERS 4 MODERATE 12 PM TO 4 PM VANCOUVER SHOWERS OR DRIZZLE 6 HIGH 12 PM TO 4 PM VICTORIA CHANCE OF SHOWERS 6 HIGH 9 AM TO 4 PM KAMLOOPS CHANCE OF SHOWERS 6 HIGH 9 AM TO 4 PM NANAIMO MAINLY SUNNY 6 HIGH 10 AM TO 4 PM PORT HARDY MAINLY SUNNY 6 HIGH 10 AM TO 4 PM PRINCE RUPERT CHANCE OF SHOWERS 5 MODERATE 10 AM TO 4 PM KELOWNA A MIX OF SUN AND CLOUD 6 HIGH 9 AM TO 4 PM PRINCE GEORGE CHANCE OF SHOWERS 4 MODERATE 10 AM TO 4 PM CRANBROOK CHANCE OF SHOWERS 7 HIGH 10 AM TO 5 PM CASTLEGAR A MIX OF SUN AND CLOUD 6 HIGH 10 AM TO 5 PM EDMONTON CHANCE OF SHOWERS 6 HIGH 10 AM TO 4 PM CALGARY CHANCE OF SHOWERS 6 HIGH 10 AM TO 5 PM LETHBRIDGE CHANCE OF SHOWERS 7 HIGH 9 AM TO 5 PM RED DEER CHANCE OF SHOWERS 6 HIGH 10 AM TO 5 PM MEDICINE HAT CHANCE OF SHOWERS 7 HIGH 9 AM TO 5 PM BANFF CHANCE OF SHOWERS 5 MODERATE 10 AM TO 4 PM GRANDE PRAIRIE CLEARING 4 MODERATE 11 AM TO 4 PM SASKATOON CHANCE OF SHOWERS 7 HIGH 9 AM TO 4 PM REGINA CHANCE OF SHOWERS 7 HIGH 9 AM TO 4 PM YORKTON CHANCE OF SHOWERS 7 HIGH 9 AM TO 4 PM THOMPSON CHANCE OF SHOWERS 6 HIGH 10 AM TO 4 PM WINNIPEG A MIX OF SUN AND CLOUD 7 HIGH 9 AM TO 5 PM THUNDER BAY CLEARING 8 VERY HIGH 10 AM TO 5 PM SUDBURY SUNNY 8 VERY HIGH 9 AM TO 5 PM WINDSOR SHOWERS OR DRIZZLE 5 MODERATE 11 AM TO 4 PM TORONTO CHANCE OF SHOWERS 3 MODERATE 11 AM TO 4 PM BARRIE SHOWERS OR DRIZZLE 3 MODERATE 11 AM TO 3 PM LONDON SHOWERS OR DRIZZLE 6 HIGH 11 AM TO 4 PM OTTAWA CHANCE OF SHOWERS 4 MODERATE 11 AM TO 4 PM KINGSTON SHOWERS OR DRIZZLE 3 MODERATE 11 AM TO 3 PM MONTREAL CHANCE OF SHOWERS 7 HIGH 9 AM TO 4 PM SHERBROOKE CHANCE OF SHOWERS 7 HIGH 9 AM TO 4 PM QUEBEC CHANCE OF SHOWERS 7 HIGH 9 AM TO 4 PM STE-ADELE CHANCE OF SHOWERS 7 HIGH 9 AM TO 4 PM FREDERICTON A MIX OF SUN AND CLOUD 7 HIGH 9 AM TO 5 PM SAINT JOHN NB A MIX OF SUN AND CLOUD 7 HIGH 9 AM TO 5 PM SYDNEY MAINLY SUNNY 7 HIGH 9 AM TO 4 PM HALIFAX A MIX OF SUN AND CLOUD 8 VERY HIGH 9 AM TO 5 PM CHARLOTTETOWN CLEARING 7 HIGH 9 AM TO 4 PM ST. JOHN'S NF CHANCE OF SHOWERS 4 MODERATE 9 AM TO 3 PM 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.