September 17 is generally a great time to visit Banff. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 16°C weather. Banff is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Banff
Currency
CAD
$ Canadian dollar
Language
English
+1 more
Driving
Right side
Connect
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Safety
Very High Safety
GPI: 1.389
Banff Weather Forecast for September 17
"Mild & Comfortable. Expect average highs of 15.5°C. 20% chance of snow."
What to Wear in Banff in September
Based on historical data for September 17, Banff typically experiences temperatures between 3.8°C and 15.5°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (20% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Banff
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
15.5°C
Daytime Peak
Average Low
3.8°C
Nighttime Low
Feels Like
15.5°C
🌤️ Feels accurate
Snow Chance
20%
Avg 1.4mm if it snows
Snowfall
0.6 cm
~20% chance
Pressure
1012.9 hPa
Medium volatility
Banff 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 15 for extended outdoor time
Type I-II
🔴 32 min to burn
Type III-IV
🟡 48 min to burn
Type V-VI
🟢 80 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
10.7°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Canada
Flight Traffic
High
89/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~261
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Banff
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:21
☀️ Noon
12:38
🌇 Sunset
18:54
⏱️ Daylight
12h 32m
Wind Speed
9.5 km/h
Light breeze
Sunshine
9.7 hrs
Direct Sun (Cloud-free)
Humidity
73%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Banff
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Banff
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 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
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Banff on September 17 averages 15.5°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 80/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Banff Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 23
14.7°C • 15% rain
Score
93
September 24
14.8°C • 13% rain
Score
93
September 18
14.9°C • 19% rain
Score
89
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 17) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Banff Worth Visiting on September 17?
Planning a trip to Banff on September 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 15.5°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 261 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 September 17 recorded in the last 30 years saw temperatures hit 24.4°C in 2025, while the coldest dropped to -0.9°C in 2021.