May 23 is generally a great time to visit Ottawa. While there is a slight chance of rain (26%), showers are usually brief. Expect comfortable 20°C weather. It's a lively time to explore Ottawa, with most attractions operating at full capacity.
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Essential Travel Info for Ottawa
Currency
CAD
$ Canadian dollar
Language
English
+1 more
Driving
Right side
Connect
The area codes for Ottawa are613and the ...
Safety
Very High Safety
GPI: 1.389
Ottawa Weather Forecast for May 23
"Mild & Comfortable. Expect average highs of 20.1°C. 26% chance of rain."
What to Wear in Ottawa in May
Based on historical data for May 23, Ottawa typically experiences temperatures between 9.3°C and 20.1°C. We recommend packing light jacket, long pants to stay comfortable. With a 26% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Ottawa
Smart Suitcase
- Light Jacket
- Long Pants
Average High
20.1°C
Daytime Peak
Average Low
9.3°C
Nighttime Low
Feels Like
20.1°C
☀️ Feels accurate
Rain Chance
26%
Avg 1.7mm if it rains
Cloud Cover
62%
Overcast
Pressure
1015.4 hPa
Medium volatility
Ottawa 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
04:00 - 10:00
16:00 - 19:00
Type I-II
🔴 18 min to burn
Type III-IV
🟡 27 min to burn
Type V-VI
🟢 45 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
13.5°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
Busy
65/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~115
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Ottawa
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:25
☀️ Noon
12:00
🌇 Sunset
19:36
⏱️ Daylight
15h 10m
Wind Speed
16.4 km/h
Gentle breeze
Sunshine
10.1 hrs
Direct Sun (Cloud-free)
Humidity
66%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Ottawa
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Ottawa
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
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 acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Ottawa on May 23 averages 20.1°C with a 26% precipitation probability. Wedding/Outdoor Event Score: 95/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Ottawa Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 26
20.9°C • 25% rain
Score
97
May 25
20.5°C • 26% rain
Score
96
May 27
21.2°C • 25% rain
Score
96
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 23) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Ottawa Worth Visiting on May 23?
Planning a trip to Ottawa on May 23? 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 20.1°C with a 26% historical precipitation risk.
✈️ Travel Logistics: Approximately 115 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 May 23 recorded in the last 30 years saw temperatures hit 26°C in 2016, while the coldest dropped to 4°C in 2023.