Fort Simpson (NT) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Fort Simpson.
Climate overview of Fort Simpson
Temperatures in Fort Simpson, Northwest Territories, Canada, vary greatly throughout the year. July is the hottest month at 25°C (77°F), while January is the coldest at -19°C (-2°F).
The city tends toward dry conditions, with around 408 mm (16 in) of rain/snowfall per year. It does, however, have a distinct dry season from October to May, with warm summers and very cold winters. The most sunshine falls in June, with an average of 10.4 hours of daily sunshine.
Fort Simpson Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Fort Simpson - and find the best time to visit.
Monthly Temperature in Fort Simpson
The climate in Fort Simpson is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 25°C (77°F) in July to a very cold -19°C (-2°F) in the coolest month, January.
Nights vary from 12°C (54°F) in July to around -27°C (-17°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Fort Simpson
Fort Simpson has a relatively dry climate with low precipitation, averaging 408 mm (16 in) of rain/snowfall annually. The climate in Fort Simpson shows significant variation throughout the year. Expect moderate rainfall in July, the wettest month, with an average of 65 mm (2.6 in) of precipitation over 11 rainy days.
In contrast, the driest month March offers drier and sunnier days, with around 16 mm (0.6 in) of snowfall over 9 snowy days. For more details, please visit our Fort Simpson Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Fort Simpson
For those who appreciate different seasons, Fort Simpson serves as an ideal destination. Expect longer, more sun-filled days in June with an average of 10.4 hours of sunshine daily, and embrace the darker days in December, offering only 1 hour of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Fort Simpson by Month
The relative humidity is high throughout the year in Fort Simpson.
The city experiences its highest humidity in November, reaching 84%. In May, the humidity drops to its lowest level at 44%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Fort Simpson
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July and August
- Warmest weather: July
- Most sunshine: June and July
- Fewest rainy days: April
- Seasonal pattern: A distinct dry season from October to May, with warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -27°C (-17°F).
Frequently asked questions about the climate in Fort Simpson
What is the best time to visit Fort Simpson?
June, July and August typically offer the most optimal weather in Fort Simpson. In contrast, January, February, March, October, November and December tend to have less optimal conditions. Fort Simpson has a distinct dry season from October to May, with warm summers and very cold winters.
What temperatures can I expect in Fort Simpson?
Daytime highs range from -19°C (-2°F) in January to 25°C (77°F) in July. Nighttime lows range from -27°C (-17°F) to 12°C (54°F). Temperatures vary considerably through the year.
How much rain does Fort Simpson get?
Annual rainfall is around 408 mm (16 in). July is the wettest month with 65 mm (2.6 in), while March is the driest with 16 mm (0.6 in).
How sunny is Fort Simpson?
Fort Simpson receives around 2,088 hours of sunshine per year. June is the sunniest month with 313 hours, while December is the cloudiest with just 30 hours. Overall, Fort Simpson enjoys abundant sunshine.
Fort Simpson 3-Day Forecast
Fort Simpson (NT) 3-Day Forecast
Fort Simpson on the map
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