Monthly Climate
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Best time to visit Calgary

August is the best time to visit Calgary for general sightseeing, with average highs of 23 °C and about 9 wet days. The comfortable season runs roughly July to September.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking August comfort 89/100
The least cloud July 47 % average cloud cover
The least rain February 12 mm
Warmth July 23 °C
Cooler weather December -2.4 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 August 89 23 °C 9
2 July 87 23 °C 11
3 September 81 19 °C 7
4 June 78 20 °C 14
5 May 68 17 °C 11
6 October 53 11 °C 6
7 April 49 11 °C 8
8 February 38 0.8 °C 4
9 March 38 5.2 °C 5
10 November 37 2.6 °C 5
11 December 37 -2.4 °C 4
12 January 37 -2.3 °C 3

When to think twice

January scores lowest with about 3 wet days and highs near -2.3 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January -2.3 °C 12 mm 63 %
February 0.8 °C 12 mm 60 %
March 5.2 °C 21 mm 64 %
April 11.2 °C 38 mm 66 %
May 16.7 °C 72 mm 62 %
June 20.0 °C 105 mm 61 %
July 23.5 °C 62 mm 47 %
August 23.3 °C 65 mm 47 %
September 18.7 °C 43 mm 51 %
October 11.0 °C 26 mm 56 %
November 2.6 °C 20 mm 61 %
December -2.4 °C 14 mm 60 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.