August 21 is generally a great time to visit Toronto. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 25°C weather. Toronto is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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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 August 21
"Mild & Comfortable. Expect average highs of 24.6°C. 20% chance of rain."
What to Wear in Toronto in August
Based on historical data for August 21, Toronto typically experiences temperatures between 17.2°C and 24.6°C. We recommend packing t-shirt, light clothing 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 Toronto
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
24.6°C
Daytime Peak
Average Low
17.2°C
Nighttime Low
Feels Like
25.3°C
☀️ Feels accurate
Rain Chance
20%
Avg 1.5mm if it rains
Cloud Cover
51%
Overcast
Pressure
1015.9 hPa
Medium volatility
Toronto 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
🔴 19 min to burn
Type III-IV
🟡 29 min to burn
Type V-VI
🟢 48 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
19.2°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
98/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~1,470
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Toronto
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:30
☀️ Noon
12:22
🌇 Sunset
19:14
⏱️ Daylight
13h 44m
Wind Speed
16.4 km/h
Gentle breeze
Sunshine
10.7 hrs
Direct Sun (Cloud-free)
Humidity
72%
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
🔴 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 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 August 21 averages 24.6°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 98/100."
— 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 (August 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Toronto Worth Visiting on August 21?
Planning a trip to Toronto on August 21? 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 24.6°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 1,470 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 August 21 recorded in the last 30 years saw temperatures hit 31°C in 2019, while the coldest dropped to 12.2°C in 2024.