Weather: Calgary Marathon
Historical weather data for race day in May. Use this to plan your race strategy, clothing, and hydration.
🌡️
14°C
Temperature
Range: 8°C – 20°C
💧
55%
Humidity
Low — comfortable
🌧️
35%
Rain Chance
Possible — check forecast
📅
May
Typical race month
Usually on a Sunday
📝 Conditions
Late spring weather in Calgary typically brings mild temperatures with a chance of rain or occasional cool mornings. The running conditions are generally favorable with lower humidity and comfortable conditions for distance running.
👟 What to Wear
Singlet or short sleeve
Ideal racing temperatures
💧 Hydration Strategy
Before the Race
Normal hydration. Drink to thirst in the 24 hours before. Avoid over-hydrating.
During the Race
Drink at aid stations every 3-4km. Alternate water and sports drink.
After the Race
Rehydrate within 30 minutes of finishing. A drink with electrolytes and some protein helps recovery.
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