April 21 is statistically one of the best days of the year in Calgary. With minimal rain risk (13%) and pleasant highs of 11°C, it's ideal for outdoor adventures. It's a lively time to explore Calgary, with most attractions operating at full capacity. Note: April 21 is Easter Monday in Calgary, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Calgary
Currency
CAD
$ Canadian dollar
Language
English
+1 more
Driving
Right side
Connect
The area codes in Calgary are403and587, ...
Safety
Very High Safety
GPI: 1.389
Calgary Weather Forecast for April 21
"Mild & Comfortable. Expect average highs of 11.1°C. 13% chance of snow."
What to Wear in Calgary in April
Based on historical data for April 21, Calgary typically experiences temperatures between -1.5°C and 11.1°C. We recommend packing heavy coat, scarf, gloves along with other layers to stay comfortable. Trends suggest it will stay mostly dry (13% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Calgary
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
- Layers (Onion System)
Average High
11.1°C
Daytime Peak
Average Low
-1.5°C
Nighttime Low
Feels Like
9.9°C
❄️ Minor difference
Snow Chance
13%
Avg 0.7mm if it snows
Snowfall
0.5 cm
~13% chance
Pressure
1015.3 hPa
Medium volatility
Calgary Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
❓ Expect variable conditions. Have flexible plans and pack for multiple weather scenarios.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 22 min to burn
Type III-IV
🟡 33 min to burn
Type V-VI
🟢 55 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
3.1°C
Dry air
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Holiday
Easter Monday
Flight Traffic
Busy
67/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~197
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Calgary
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:29
☀️ Noon
12:36
🌇 Sunset
19:42
⏱️ Daylight
14h 12m
Wind Speed
15.2 km/h
Gentle breeze
Sunshine
10.4 hrs
Direct Sun (Cloud-free)
Humidity
58%
Comfortable
Travel Intelligence
Exclusive flight analytics & health data for Calgary
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Calgary
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
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
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Calgary on April 21 averages 11.1°C with a 13% precipitation probability. Wedding/Outdoor Event Score: 72/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Calgary Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
April 27
12.9°C • 15% rain
Score
80
April 28
13.1°C • 14% rain
Score
80
April 25
12.7°C • 14% rain
Score
79
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (April 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Calgary Worth Visiting on April 21?
Planning a trip to Calgary on April 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 11.1°C with a 13% historical precipitation risk.
🎉 Local Event: The date coincides with Easter Monday, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 197 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 April 21 recorded in the last 30 years saw temperatures hit 21.2°C in 2016, while the coldest dropped to -6°C in 2022.