August 18 is generally a great time to visit Quebec City. While there is a slight chance of rain (34%), showers are usually brief. Expect comfortable 24°C weather. Expect a bustling atmosphere in Quebec City right now—this is when the city truly comes alive with visitors. Note: August 18 is Discovery Day in Quebec City, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Quebec City
Currency
CAD
$ Canadian dollar
Language
English
+1 more
Driving
Right side
Connect
The organizationZAP Québecprovides free ...
Safety
Very High Safety
GPI: 1.389
Quebec City Weather Forecast for August 18
"Mild & Comfortable. Expect average highs of 23.6°C. 34% chance of rain."
What to Wear in Quebec City in August
Based on historical data for August 18, Quebec City typically experiences temperatures between 14.8°C and 23.6°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 34% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Quebec City
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
23.6°C
Daytime Peak
Average Low
14.8°C
Nighttime Low
Feels Like
24.3°C
☀️ Feels accurate
Rain Chance
34%
Avg 2.5mm if it rains
Cloud Cover
55%
Overcast
Pressure
1014.6 hPa
Medium volatility
Quebec City Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 81% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
04:00 - 09:30
16:00 - 18:00
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
19.5°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
High
98/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~46
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Quebec City
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:47
☀️ Noon
11:50
🌇 Sunset
18:52
⏱️ Daylight
14h 5m
Wind Speed
14.5 km/h
Gentle breeze
Sunshine
10.3 hrs
Direct Sun (Cloud-free)
Humidity
78%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Quebec City
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Quebec City
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Quebec City on August 18 averages 23.6°C with a 34% precipitation probability. Wedding/Outdoor Event Score: 93/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Quebec City Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
August 25
22.7°C • 25% rain
Score
97
August 14
24.2°C • 30% rain
Score
96
August 15
24°C • 29% rain
Score
96
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 18) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Quebec City Worth Visiting on August 18?
Planning a trip to Quebec City 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 23.6°C with a 34% historical precipitation risk.
🎉 Local Event: The date coincides with Discovery Day, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 46 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 27.1°C in 2021, while the coldest dropped to 8.2°C in 2025.