May 21 is generally a great time to visit Charlottetown. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 15°C weather. You'll find plenty of company in Charlottetown this month as tourism activity remains quite robust.
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Essential Travel Info for Charlottetown
Currency
CAD
$ Canadian dollar
Language
English
+1 more
Driving
Right side
Safety
Very High Safety
GPI: 1.389
Charlottetown Weather Forecast for May 21
"Mild & Comfortable. Expect average highs of 14.6°C. 20% chance of rain."
What to Wear in Charlottetown in May
Based on historical data for May 21, Charlottetown typically experiences temperatures between 6.7°C and 14.6°C. We recommend packing light jacket, long pants 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 Charlottetown
Smart Suitcase
- Light Jacket
- Long Pants
Average High
14.6°C
Daytime Peak
Average Low
6.7°C
Nighttime Low
Feels Like
14.4°C
🌤️ Feels accurate
Rain Chance
20%
Avg 1.3mm if it rains
Cloud Cover
66%
Overcast
Pressure
1015.7 hPa
High volatility
Charlottetown 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 - 20:00
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
10.4°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Canada
Flight Traffic
Busy
75/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~12
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Charlottetown
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:34
☀️ Noon
13:10
🌇 Sunset
20:46
⏱️ Daylight
15h 11m
Wind Speed
23.8 km/h
Moderate wind
Sunshine
9.4 hrs
Direct Sun (Cloud-free)
Humidity
76%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Charlottetown
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 Charlottetown
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Weather unlikely to affect joint pain.
Fish are active due to pressure changes.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Charlottetown on May 21 averages 14.6°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 87/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Charlottetown Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (May 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Charlottetown Worth Visiting on May 21?
Planning a trip to Charlottetown on May 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 14.6°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 12 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Canada, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 10°C (polar plunge). Wave conditions are generally lake-like with heights around 0.49m.
📊 Historical Extremes: The hottest May 21 recorded in the last 30 years saw temperatures hit 23.9°C in 2016, while the coldest dropped to 2.2°C in 2019.