FPCN48 CWAO 190000 ULTRAVIOLET (UV) INDEX FORECAST FOR CANADIAN CITIES ISSUED BY ENVIRONMENT CANADA AT 8:00 P.M. EDT MONDAY 18 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 A MIX OF SUN AND CLOUD 2 LOW NONE INUVIK A MIX OF SUN AND CLOUD 3 MODERATE 1 PM TO 4 PM RANKIN INLET CHANCE OF SHOWERS 3 MODERATE 10 AM TO 3 PM YELLOWKNIFE A MIX OF SUN AND CLOUD 3 MODERATE 11 AM TO 4 PM WHITEHORSE CHANCE OF SHOWERS 4 MODERATE 11 AM TO 4 PM VANCOUVER MAINLY CLOUDY 7 HIGH 9 AM TO 4 PM VICTORIA CHANCE OF SHOWERS 6 HIGH 9 AM TO 4 PM KAMLOOPS A MIX OF SUN AND CLOUD 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 RAIN 3 MODERATE 12 PM TO 3 PM KELOWNA MAINLY CLOUDY 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 MAINLY SUNNY 7 HIGH 10 AM TO 5 PM EDMONTON CHANCE OF SHOWERS 6 HIGH 10 AM TO 5 PM CALGARY MAINLY SUNNY 7 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 MAINLY CLOUDY 6 HIGH 10 AM TO 5 PM GRANDE PRAIRIE CHANCE OF SHOWERS 4 MODERATE 10 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 MAINLY SUNNY 5 MODERATE 10 AM TO 4 PM WINNIPEG A MIX OF SUN AND CLOUD 7 HIGH 9 AM TO 5 PM THUNDER BAY SHOWERS OR DRIZZLE 5 MODERATE 10 AM TO 5 PM SUDBURY CHANCE OF SHOWERS 7 HIGH 9 AM TO 5 PM WINDSOR CHANCE OF SHOWERS 6 HIGH 10 AM TO 5 PM TORONTO CHANCE OF SHOWERS 8 VERY HIGH 9 AM TO 5 PM BARRIE CHANCE OF SHOWERS 8 VERY HIGH 9 AM TO 4 PM LONDON CHANCE OF SHOWERS 9 VERY HIGH 9 AM TO 4 PM OTTAWA A MIX OF SUN AND CLOUD 8 VERY HIGH 9 AM TO 4 PM KINGSTON A MIX OF SUN AND CLOUD 8 VERY 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 8 VERY HIGH 9 AM TO 5 PM SAINT JOHN NB MAINLY SUNNY 8 VERY HIGH 9 AM TO 5 PM SYDNEY CHANCE OF SHOWERS 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.