September 17 is statistically one of the best days of the year in Toronto. With minimal rain risk (9%) and pleasant highs of 22°C, it's ideal for outdoor adventures. As it's peak season for Toronto, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Toronto
Currency
CAD
$ Canadian dollar
Language
English
+1 more
Driving
Right side
Connect
Calling...
Safety
Very High Safety
GPI: 1.389
Toronto Weather Forecast for September 17
"Mild & Comfortable. Expect average highs of 21.6°C. 9% chance of rain."
What to Wear in Toronto in September
Based on historical data for September 17, Toronto typically experiences temperatures between 14°C and 21.6°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (9% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Toronto
Smart Suitcase
- Light Jacket
- Long Pants
Average High
21.6°C
Daytime Peak
Average Low
14°C
Nighttime Low
Feels Like
21.9°C
☀️ Feels accurate
Rain Chance
9%
Avg 0.5mm if it rains
Cloud Cover
44%
Overcast
Pressure
1018.5 hPa
Medium volatility
Toronto Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 99% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 27 min to burn
Type III-IV
🟡 41 min to burn
Type V-VI
🟢 68 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
16.5°C
Noticeable
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
100/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~1,494
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Toronto
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:00
☀️ Noon
12:13
🌇 Sunset
18:26
⏱️ Daylight
12h 26m
Wind Speed
16.7 km/h
Gentle breeze
Sunshine
10.2 hrs
Direct Sun (Cloud-free)
Humidity
73%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Toronto
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Toronto
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.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
Atlantic Hurricane Risk
Season: Jun - Nov
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Toronto on September 17 averages 21.6°C with a 9% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Toronto Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (September 17) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Toronto Worth Visiting on September 17?
Planning a trip to Toronto 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 21.6°C with a 9% historical precipitation risk.
✈️ Travel Logistics: Approximately 1,494 landing slots available daily during this period, indicating peak tourist activity.
💉 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 26°C in 2018, while the coldest dropped to 11°C in 2020.