Northwest Territories Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in the Northwest Territories, Canada in September.

Are you planning a trip a to the Northwest Territories, Canada in September and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in the Northwest Territories in September

The Northwest Territories, Canada is a region in Canada. September in the Northwest Territories generally has temperatures that range from cold to mild, with moderate precipitation.

Temperatures

The average maximum daytime temperatures vary from cold in Inuvik at 9°C (48°F) to mild in Fort Simpson at 15°C (59°F). Nighttime temperatures generally drop to 4°C (39°F) in Fort Simpson and 2°C (36°F) in Inuvik.

For specific regional insights in the Northwest Territories, Canada, refer to the map provided below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Inuvik with an average of 40 mm (1.6 in) to moderate rainfall in Thaidene Nëné National Park Reserve with 62 mm (2.4 in).

Average sunshine

Sunshine levels are moderate in most locations. Inuvik typically sees 107 hours of sunlight, creating comfortable conditions that aren't too bright or too dim. Looking for something sunnier? Our weather planner helps you discover destinations with more reliable sunshine.

Explore the Northwest Territories by month

Pick a month to see the average temperature, rainfall and sunshine in the Northwest Territories - and find the best time to visit. (based on Inuvik)

Best Places to Visit in the Northwest Territories in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across the Northwest Territories.

perfect weather
pleasant
tolerable
unpleasant
poor

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).

Popular Destinations in the Northwest Territories

What is the weather like in September for some of the most popular destinations in the Northwest Territories, Canada?

Temperature range in the Northwest Territories (September)

Precipitation variation in the Northwest Territories (September)

Inuvik

In September Inuvik generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 2°C (36°F) and moderate monthly rainfall. So on average the conditions are less favorable that month.

August
September
October
Max temperature
16°C (61°F)
9°C (48°F)
-3°C (27°F)
Min temperature
7°C (45°F)
2°C (36°F)
-9°C (16°F)
Monthly sun hours
219 hours
107 hours
51 hours
Monthly rainfall
48 mm (1.9 in)
40 mm (1.6 in)
28 mm (1.1 in)
Monthly rainy days
12 days
11 days
15 days
Weather conditions

Yellowknife

In September Yellowknife generally has moderate temperatures with maximum daytime temperatures around 12°C (54°F), minimum nighttime temperatures around 5°C (41°F) and moderate monthly rainfall. So on average the conditions are mixed that month.

August
September
October
Max temperature
19°C (66°F)
12°C (54°F)
3°C (37°F)
Min temperature
11°C (52°F)
5°C (41°F)
-3°C (27°F)
Monthly sun hours
276 hours
157 hours
65 hours
Monthly rainfall
51 mm (2 in)
48 mm (1.9 in)
32 mm (1.3 in)
Monthly rainy days
10 days
10 days
13 days
Weather conditions

Hay River

In September Hay River generally has moderate temperatures with maximum daytime temperatures around 14°C (57°F), minimum nighttime temperatures around 6°C (43°F) and moderate monthly rainfall. So on average the conditions are good that month.

August
September
October
Max temperature
21°C (70°F)
14°C (57°F)
5°C (41°F)
Min temperature
12°C (54°F)
6°C (43°F)
-1°C (30°F)
Monthly rainfall
68 mm (2.7 in)
48 mm (1.9 in)
35 mm (1.4 in)
Monthly rainy days
10 days
10 days
12 days
Weather conditions

Fort Simpson

In September Fort Simpson generally has moderate temperatures with maximum daytime temperatures around 15°C (59°F), minimum nighttime temperatures around 4°C (39°F) and moderate monthly rainfall. So on average the conditions are good that month.

August
September
October
Max temperature
22°C (72°F)
15°C (59°F)
3°C (37°F)
Min temperature
10°C (50°F)
4°C (39°F)
-4°C (25°F)
Monthly sun hours
265 hours
165 hours
78 hours
Monthly rainfall
62 mm (2.4 in)
41 mm (1.6 in)
32 mm (1.3 in)
Monthly rainy days
11 days
9 days
12 days
Weather conditions

Thaidene Nëné National Park Reserve

In September Thaidene Nëné National Park Reserve generally has low temperatures with maximum daytime temperatures around 12°C (54°F), minimum nighttime temperatures around 7°C (45°F) and moderate monthly rainfall. So on average the conditions are mixed that month.

August
September
October
Max temperature
16°C (61°F)
12°C (54°F)
4°C (39°F)
Min temperature
12°C (54°F)
7°C (45°F)
0°C (32°F)
Monthly rainfall
61 mm (2.4 in)
62 mm (2.4 in)
51 mm (2 in)
Monthly rainy days
12 days
11 days
13 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in the Northwest Territories, in Canada.

Popular cities in September

Day & night temperatures, rainfall and average weather in the Northwest Territories in September.

City Weather Day temp Night temp Rainfall
Inuvik 9°C (48°F) 2°C (36°F) 40 mm (1.6 in)
Yellowknife 12°C (54°F) 5°C (41°F) 48 mm (1.9 in)
Hay River 14°C (57°F) 6°C (43°F) 48 mm (1.9 in)
Fort Simpson 15°C (59°F) 4°C (39°F) 41 mm (1.6 in)
Thaidene Nëné National Park Reserve 12°C (54°F) 7°C (45°F) 62 mm (2.4 in)

The Northwest Territories weather in September: frequently asked questions

What is the weather like in the Northwest Territories, Canada in September?

the Northwest Territories, Canada typically experiences less favorable weather in September, part of the season. Daytime highs in Inuvik average around 9°C (48°F), and temperatures drop to about 2°C (36°F) at night.

What is the average temperature in the Northwest Territories, Canada in September?

Daytime temperatures in Inuvik peak at roughly 9°C (48°F) in September, dropping to about 2°C (36°F) overnight.

Does the Northwest Territories, Canada get a lot of rain in September?

Rain is generally moderate to light in the Northwest Territories, Canada during September, with Inuvik averaging close to 40 mm (1.6 in).

Is September a Good Time to Visit the Northwest Territories, Canada?

In our view, September might not be the best time to travel to the Northwest Territories, Canada with often less favorable weather in Inuvik.

Generally speaking, the best visiting conditions can be found in July offering mostly excellent weather in Inuvik. On the other hand, the months of January, February, March, April, September, October, November and December tend to have less favorable weather conditions.

Interested in more climate information?

We have much more information about the climate in the Northwest Territories.

Weather and climate has detailed information for every country in the world. Are you going to Canada? Get detailed historical weather averages for many cities in Canada.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.