Northwest Territories weather in September 2025

Q: How warm is it in the Northwest Territories in September?

Daytime temperatures usually reach 10°C in Yellowknife, Northwest Territories in September, falling to 3°C at night.

Q: How sunny is it in the Northwest Territories in September?

There are normally 5 hours of bright sunshine each day in Yellowknife, Northwest Territories in September - that's 39% of daylight hours.

Q: Does it rain in the Northwest Territories in September?

There are usually 10 days with some rain in Yellowknife, Northwest Territories in September and the average monthly rainfall is 29mm.

Expect daytime maximum temperatures of 10°C in Northwest Territories in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 10 days with some rainfall.

10
10°C max day temperature
5
5 hours of sunshine per day
10
10 days with some rainfall
3
3°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
29
29 mm of monthly rainfall
2
2 (Low) UV index

More about the Northwest Territories

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The September weather guide for Northwest Territories (Yellowknife) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Northwest Territories destinations

Below are average maximum temperatures at popular countries, regions and places in the Northwest Territories in September. Select a holiday destination to see more weather parameters.

10
Yellowknife
7
Inuvik

All Northwest Territories destinations

Metric (°C / mm) | Imperial (°F / inches)

More about Canada

How warm is it in the Northwest Territories in September?

Daytime temperatures usually reach 10°C in Yellowknife, Northwest Territories in September, falling to 3°C at night.

How sunny is it in the Northwest Territories in September?

There are normally 5 hours of bright sunshine each day in Yellowknife, Northwest Territories in September - that's 39% of daylight hours.

Does it rain in the Northwest Territories in September?

There are usually 10 days with some rain in Yellowknife, Northwest Territories in September and the average monthly rainfall is 29mm.

Northwest Territories September sunrise & sunset times

Browse the sunrise and sunset times for Northwest Territories in September 2025. Select a month to view Northwest Territories sunrise and sunset times for the next 12 months. The Northwest Territories sunrise and sunset times shown below are for Yellowknife.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Monday, 1st September 2025	05:27	19:46
Monday, 15th September 2025	06:04	19:00
Tuesday, 30th September 2025	06:44	18:10

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Northwest Territories - quick facts
Flight time^✝	13.5 hours
Time difference	UK -7 hours
Language(s)	English, French
Currency	Canadian Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Nature
Tourist info	Northwest Territories Tourism