August 18 is generally a great time to visit Whistler. While there is a slight chance of rain (18%), showers are usually brief. Expect comfortable 23°C weather. It's a lively time to explore Whistler, with most attractions operating at full capacity. Note: August 18 is Discovery Day in Whistler, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Whistler
Currency
CAD
$ Canadian dollar
Language
English
+1 more
Driving
Right side
Safety
Very High Safety
GPI: 1.389
Whistler Weather Forecast for August 18
"Mild & Comfortable. Expect average highs of 22.9°C. 18% chance of rain."
What to Wear in Whistler in August
Based on historical data for August 18, Whistler typically experiences temperatures between 12.5°C and 22.9°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (18% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Whistler
Smart Suitcase
- Light Jacket
- Long Pants
Average High
22.9°C
Daytime Peak
Average Low
12.5°C
Nighttime Low
Feels Like
23.3°C
☀️ Feels accurate
Rain Chance
18%
Avg 1.1mm if it rains
Cloud Cover
53%
Overcast
Pressure
1016 hPa
Low volatility
Whistler Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 21 min to burn
Type III-IV
🟡 32 min to burn
Type V-VI
🟢 53 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
17.4°C
Noticeable
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
63/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~277
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Whistler
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:07
☀️ Noon
12:17
🌇 Sunset
19:27
⏱️ Daylight
14h 19m
Wind Speed
7.2 km/h
Light breeze
Sunshine
12.0 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Whistler
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Whistler
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Whistler on August 18 averages 22.9°C with a 18% precipitation probability. Wedding/Outdoor Event Score: 99/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Whistler Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (August 18) in other destinations
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📍 Is Whistler Worth Visiting on August 18?
Planning a trip to Whistler on August 18? 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 22.9°C with a 18% historical precipitation risk.
🎉 Local Event: The date coincides with Discovery Day, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 277 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 18 recorded in the last 30 years saw temperatures hit 33.6°C in 2022, while the coldest dropped to 9.9°C in 2025.