August 17 is generally a great time to visit Yellowknife. While there is a slight chance of rain (21%), showers are usually brief. Expect comfortable 18°C weather. You'll find plenty of company in Yellowknife this month as tourism activity remains quite robust. Note: August 17 is Discovery Day in Yellowknife, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Yellowknife
Currency
CAD
$ Canadian dollar
Language
English
+1 more
Driving
Right side
Safety
Very High Safety
GPI: 1.389
Yellowknife Weather Forecast for August 17
"Mild & Comfortable. Expect average highs of 18°C. 21% chance of rain."
What to Wear in Yellowknife in August
Based on historical data for August 17, Yellowknife typically experiences temperatures between 11.7°C and 18°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (21% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Yellowknife
Smart Suitcase
- Light Jacket
- Long Pants
Average High
18°C
Daytime Peak
Average Low
11.7°C
Nighttime Low
Feels Like
18°C
🌤️ Feels accurate
Rain Chance
21%
Avg 1.1mm if it rains
Cloud Cover
64%
Overcast
Pressure
1010.2 hPa
Medium volatility
Yellowknife Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 91% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 35 min to burn
Type III-IV
🟡 53 min to burn
Type V-VI
🟢 88 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12.7°C
Pleasant
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Holiday
Discovery Day
Flight Traffic
Busy
68/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~15
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Yellowknife
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:46
☀️ Noon
12:42
🌇 Sunset
20:39
⏱️ Daylight
15h 53m
Wind Speed
18.6 km/h
Gentle breeze
Sunshine
10.4 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Yellowknife
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Yellowknife
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Yellowknife on August 17 averages 18°C with a 21% precipitation probability. Wedding/Outdoor Event Score: 92/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Yellowknife Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
August 11
19.6°C • 17% rain
Score
97
August 12
19.5°C • 16% rain
Score
97
August 13
19.3°C • 16% rain
Score
97
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 17) in other destinations
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📍 Is Yellowknife Worth Visiting on August 17?
Planning a trip to Yellowknife on August 17? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 18°C with a 21% historical precipitation risk.
🎉 Local Event: The date coincides with Discovery Day, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 15 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Canada, including COVID-19.
📊 Historical Extremes: The hottest August 17 recorded in the last 30 years saw temperatures hit 25.3°C in 2022, while the coldest dropped to 6.9°C in 2019.