FPCN48 CWAO 222000 ULTRAVIOLET (UV) INDEX FORECAST FOR CANADIAN CITIES ISSUED BY ENVIRONMENT CANADA AT 4:00 P.M. EDT THURSDAY 22 MAY 2025 FOR THURSDAY AFTERNOON AND FRIDAY. 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. THURSDAY LOCATION WEATHER FORECAST UV INDEX CATEGORY TIME ABOVE 3 WHITEHORSE A MIX OF SUN AND CLOUD 4 MODERATE 10 AM TO 4 PM VANCOUVER MAINLY SUNNY 6 HIGH 9 AM TO 4 PM VICTORIA MAINLY SUNNY 6 HIGH 9 AM TO 4 PM KAMLOOPS CHANCE OF SHOWERS 6 HIGH 9 AM TO 4 PM NANAIMO CHANCE OF SHOWERS 6 HIGH 9 AM TO 4 PM PORT HARDY A MIX OF SUN AND CLOUD 6 HIGH 9 AM TO 5 PM PRINCE RUPERT MAINLY SUNNY 5 MODERATE 10 AM TO 5 PM KELOWNA CHANCE OF SHOWERS 5 MODERATE 9 AM TO 4 PM PRINCE GEORGE CHANCE OF SHOWERS 5 MODERATE 9 AM TO 4 PM CRANBROOK CHANCE OF SHOWERS 5 MODERATE 10 AM TO 5 PM CASTLEGAR CHANCE OF SHOWERS 5 MODERATE 10 AM TO 5 PM FRIDAY LOCATION WEATHER FORECAST UV INDEX CATEGORY TIME ABOVE 3 RESOLUTE FLURRIES 2 LOW NONE INUVIK CLOUDY 3 MODERATE 2 PM TO 3 PM RANKIN INLET A MIX OF SUN AND CLOUD 5 MODERATE 10 AM TO 4 PM YELLOWKNIFE MAINLY SUNNY 4 MODERATE 10 AM TO 4 PM WHITEHORSE MAINLY SUNNY 4 MODERATE 10 AM TO 4 PM VANCOUVER CLEARING 6 HIGH 10 AM TO 4 PM VICTORIA MAINLY SUNNY 6 HIGH 9 AM TO 4 PM KAMLOOPS MAINLY SUNNY 6 HIGH 9 AM TO 4 PM NANAIMO CHANCE OF SHOWERS 6 HIGH 9 AM TO 4 PM PORT HARDY PERIODS OF RAIN 2 LOW NONE PRINCE RUPERT PERIODS OF RAIN 1 LOW NONE KELOWNA CHANCE OF SHOWERS 6 HIGH 9 AM TO 4 PM PRINCE GEORGE CHANCE OF SHOWERS 5 MODERATE 9 AM TO 4 PM CRANBROOK CHANCE OF SHOWERS 6 HIGH 9 AM TO 5 PM CASTLEGAR CHANCE OF SHOWERS 6 HIGH 10 AM TO 5 PM EDMONTON CHANCE OF SHOWERS 5 MODERATE 9 AM TO 5 PM CALGARY CHANCE OF SHOWERS 6 HIGH 9 AM TO 5 PM LETHBRIDGE CHANCE OF SHOWERS 6 HIGH 9 AM TO 5 PM RED DEER CHANCE OF SHOWERS 6 HIGH 9 AM TO 5 PM MEDICINE HAT CHANCE OF SHOWERS 6 HIGH 9 AM TO 5 PM BANFF MAINLY SUNNY 6 HIGH 10 AM TO 5 PM GRANDE PRAIRIE CHANCE OF SHOWERS 6 HIGH 10 AM TO 5 PM SASKATOON A MIX OF SUN AND CLOUD 6 HIGH 9 AM TO 4 PM REGINA MAINLY SUNNY 6 HIGH 9 AM TO 4 PM YORKTON MAINLY SUNNY 7 HIGH 8 AM TO 4 PM THOMPSON MAINLY SUNNY 5 MODERATE 9 AM TO 5 PM WINNIPEG MAINLY SUNNY 7 HIGH 9 AM TO 5 PM THUNDER BAY MAINLY CLOUDY 5 MODERATE 10 AM TO 5 PM SUDBURY PERIODS OF RAIN 1 LOW NONE WINDSOR CHANCE OF SHOWERS 5 MODERATE 9 AM TO 4 PM TORONTO PERIODS OF RAIN 2 LOW NONE BARRIE PERIODS OF RAIN 2 LOW NONE LONDON CHANCE OF SHOWERS 3 MODERATE 12 PM TO 2 PM OTTAWA CHANCE OF SHOWERS 3 MODERATE 11 AM TO 2 PM KINGSTON PERIODS OF RAIN 2 LOW NONE MONTREAL CHANCE OF SHOWERS 5 MODERATE 9 AM TO 12 PM SHERBROOKE RAIN 1 LOW NONE QUEBEC PERIODS OF RAIN 2 LOW NONE STE-ADELE PERIODS OF RAIN 2 LOW NONE FREDERICTON RAIN 1 LOW NONE SAINT JOHN NB RAIN 1 LOW NONE SYDNEY RAIN 3 MODERATE 11 AM TO 12 PM HALIFAX RAIN 1 LOW NONE CHARLOTTETOWN RAIN 2 LOW NONE ST. JOHN'S NF MAINLY CLOUDY 6 HIGH 9 AM TO 4 PM GOOSE BAY MAINLY SUNNY 6 HIGH 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.