Alberta · Canada
Calgary in September
In September, Calgary averages a daytime high of 18 °C and a night-time low of 3 °C, with about 45 mm of rain over the month. It falls outside Calgary's most comfortable months, July and August.
- Average high
- 18 °C
- Average low
- 3 °C
- Rain in the month
- 45 mm
- Daylight on 15 Sep
- 12 h 30 min
- Comfortable month
- No
- Places to stay
- 74
When to go
How September compares with the rest of the year in Calgary
September is the 4th warmest month in Calgary by average daytime high; across the year the highs run from -2 °C to 23 °C and the lows from -14 °C to 9 °C. By day, September is 5 °C cooler than August, and October is 7 °C cooler than September.
September brings 45 mm of rain, more than the monthly average of 38 mm (453 mm a year); it is the 5th wettest month.
On 15 September the sun is up for about 12 h 30 min, against 8 h at the shortest and 16 h 30 min at the longest point of the year (calculated from the latitude, sunrise to sunset).
| Month | High | Low | Rain | Comfortable |
|---|---|---|---|---|
| January | -2 °C | -14 °C | 15 mm | |
| February | 0 °C | -13 °C | 11 mm | |
| March | 4 °C | -8 °C | 22 mm | |
| April | 10 °C | -3 °C | 38 mm | |
| May | 16 °C | 2 °C | 62 mm | |
| June | 19 °C | 6 °C | 99 mm | |
| July | 23 °C | 9 °C | 62 mm | Yes |
| August | 22 °C | 8 °C | 47 mm | Yes |
| September | 18 °C | 3 °C | 45 mm | |
| October | 11 °C | -2 °C | 23 mm | |
| November | 3 °C | -8 °C | 18 mm | |
| December | -1 °C | -13 °C | 13 mm |
Comfortable means average daytime high between 18 °C and 29 °C and under 80 mm of rain in the month. Averages for 1991–2020 over the surrounding area, a grid square about 50 km across, so a coast or a nearby mountain can make the town itself warmer or cooler. Data: CRU TS v4.10, Climatic Research Unit, University of East Anglia (Open Database License).
When to go
Is September a good time to visit Calgary?
Not by the measure used here: the average high of 18 °C is below 18 °C. The comfortable months in Calgary are July and August; the nearest are August, before, and July, after.
The measure is about weather for a city stay only; it says nothing about events, school holidays or prices.
Public holidays in Canada in September
Nationwide public holidays; shops and offices may close on these dates.
When to go
Destinations near Calgary that are comfortable in September
Within 300 km, nearest first, by the same measure.
Where to stay
Where to stay in Calgary
This guide lists 74 places to stay in Calgary, hotels recorded in Wikidata. By straight-line distance from the centre: under 1 km, 14; 1–3 km, 6; 3–10 km, 33; 10 km or more, 21.
Sources: climate from CRU TS v4.10 (Climatic Research Unit, University of East Anglia; Open Database License), 1991–2020 averages; day length calculated from the latitude; public holidays from python-holidays (MIT); places to stay from each operator's own public pages and Wikidata. How this guide is made.