The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
October in Alert averages -15°C (5°F) during the day and -22°C (-8°F) at night. Around 20 mm (0.8 in) of snowfall is typical for this time of year.
Our weather planner can help you find worldwide destinations with pleasant weather during this period. August typically offers the best weather for Alert.
Pick a month to see the average temperature, rainfall and sunshine in Alert - and find the best time to visit.
48-year average (1976-2025)
Based on our historical records, temperatures in Alert typically drop from around -12°C (10°F) at the start of October to approximately -20°C (-4°F) by the end. Nights are very cold, with lows typically ranging from -26°C (-15°F) to -16°C (3°F).
Browse day-by-day weather records for Alert spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on weather observations in Alert between 1999 and 2025, these are the recorded extremes during October.
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in October →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
We recommend you pack up your warm winter gear for Alert in October. If you have insulated boots, thermal layers, and a heavy winter coat that can handle snow and freezing temperatures it's smart to bring them. Don't forget gloves, a warm hat, and a scarf. Almost no rain is expected, so no need to bring rain gear. With limited sunshine expected, sunglasses aren't a priority for packing.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Alert climate overview or explore weather in Canada.
Where to go in October - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
Canada in September: Where Is the Best Weather?
Compare September weather in Toronto, Montreal, Vancouver, Quebec City and Osoyoos to find Canada's warmest, driest and sunniest destinations.
Canoeing the south Nahannii
The South Nahanni in the northwest of Canada is one of the most impressive wilderness rivers in the world. Canoeing the south Nahanni is something you must add to your bucket list.
See Polar Bears in Churchill Canada
Thousands of bears gather at the small town of Churchill. In the evening the northern lights give a light show against the dark evening sky. An unforgettable experience.