Calgary Weather in September: Climate, Temperature & Travel Tips
Avg 12.0°C · 33mm rain — September is autumn in Calgary.
- Avg high
- 19.0 °C
- Avg low
- 4.9 °C
- Avg
- 12.0 °C
- Precipitation
- 33 mm
Source: Open-Meteo Archive 2014–2023 · 10-year climate normals
Climate Overview
September in Calgary, Canada brings autumn conditions: average temperature 12.0°C, average high 19.0°C, average low 4.9°C. Monthly rainfall averages 33mm, making it a drier time of year.
Conditions are pleasant for most travel activities.
What to Pack
- Light jacket or fleece, long-sleeve shirts
- Closed shoes; layers for changing conditions
Best Things to Do
- Walking tours and city exploration
- Parks and outdoor cafes
- Seasonal food and night markets (where applicable)
Pros and Cons of Visiting in September
Pros:
- Low rainfall — minimal disruption to outdoor plans
- Shoulder season often means smaller crowds and lower prices
Cons:
- No major weather drawbacks for typical activities
Climate source: Open-Meteo Archive (2014–2023).
Colour = avg temperature · blue = cool · orange = warm
- 1 July 17.6°C
- 2 August 16.2°C
- 3 June 13.9°C
- 1 February -6.5°C
- 2 December -6.2°C
- 3 January -5.9°C
FAQ
01 What is the average temperature in Calgary in September? +
The average is 12.0°C, with a high of 19°C and a low of 5°C.
02 What is Calgary like to visit in September? +
It is autumn in Calgary, which is cool — bring warm clothes.
03 Does it rain often in Calgary during September? +
Average rainfall is 33mm, which is low.
04 What should I pack for Calgary in September? +
Light jacket or fleece, long-sleeve shirts; Closed shoes; layers for changing conditions.
05 Is September a peak travel season for Calgary? +
It is closer to off-season, with more reasonable prices and fewer crowds.
06 Where does this climate data come from? +
Monthly averages computed from Open-Meteo Archive 2014–2023 daily observations.
- Sources
- Open-Meteo Archive 2014-2023
- Updated
- 2026-04-17