Yellowknife weather in August 2025

Expect daytime maximum temperatures of 18°C in Yellowknife in August based on long-term weather averages. There are 9 hours of sunshine per day on average with 10 days with some rainfall and typically 42 mm of rainfall in the month.

  • 18°C maximum daytime temperature in August in Yellowknife18
    18°C max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in August in Yellowknife10
    10 days with some rainfall
  • 10°C minimum night-time temperature in August in Yellowknife10
    10°C min night temperature
  • 16 hours of daylight per day in August in Yellowknife16
    16 hours of daylight per day
  • No heat & humidity in August in Yellowknife0
    No heat & humidity
  • 42 mm monthly rainfall in August in Yellowknife42
    42 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in August in Yellowknife4
    4 (Moderate) UV index

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The August 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.

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

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How hot is it in Yellowknife in August?

Daytime temperatures usually reach 18°C in Yellowknife in August, falling to 10°C at night.

How sunny is it in Yellowknife in August?

There are normally 9 hours of bright sunshine each day in Yellowknife in August - that's 56% of daylight hours.

Does it rain in Yellowknife in August?

There are usually 10 days with some rain in Yellowknife in August and the average monthly rainfall is 42mm.

Yellowknife August sunrise & sunset times

Browse the sunrise and sunset times for Yellowknife in August 2025. Select a month to view Yellowknife sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:01 21:24
Saturday, 16th August 2025 04:43 20:38
Sunday, 31st August 2025 05:24 19:50

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