Calgary climate

Name: Calgary
Address: CA

Calgary is warmest in July, with average highs of 23 °C, and coldest in January, when nights average -12 °C. June is the wettest month (105 mm) and February the driest (12 mm). Figures are 1991–2020 climate normals.

Across a full year Calgary averages 490 mm of rain, 31 days above 25 °C and 189 days below freezing.

Canada · 1,048 m elevation · population 1,306,784 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 23 °C
Coldest month January -12 °C
Driest month February 12 mm
Wettest month June 105 mm
Least cloud July 47 % cloud
Hottest on record August 37 °C
Coldest on record January -39 °C

What to expectCalgary through the year

Calgary has a clear annual cycle: average daily highs run from -2.3 °C in January to 23 °C in July, a swing of 25 °C in mean temperature across the year.

Counted across a normal year, 31 days a year reach 25 °C, 3 of them reach 30 °C, 189 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in August.

Rain is strongly seasonal. June averages 105 mm against 12 mm in February — 8.8 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

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 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	-2.3 °C	-12.5 °C	-8.3 °C	10.3 °C	-39.4 °C	0	0	30
February	0.8 °C	-10.9 °C	-6.3 °C	17.7 °C	-33.3 °C	0	0	28
March	5.2 °C	-7.2 °C	-2.2 °C	22.2 °C	-35.8 °C	0	0	29
April	11.2 °C	-1.9 °C	3.9 °C	27.0 °C	-19.6 °C	0	0	21
May	16.7 °C	3.1 °C	9.6 °C	29.9 °C	-12.4 °C	2	0	6
June	20.0 °C	7.8 °C	13.7 °C	31.8 °C	-2.1 °C	3	0	0
July	23.5 °C	10.8 °C	16.9 °C	35.0 °C	0.8 °C	11	2	0
August	23.3 °C	10.1 °C	16.2 °C	36.7 °C	-2.1 °C	12	1	0
September	18.7 °C	5.7 °C	11.2 °C	32.1 °C	-8.5 °C	4	0	2
October	11.0 °C	-0.2 °C	4.3 °C	25.1 °C	-27.8 °C	0	0	16
November	2.6 °C	-6.5 °C	-2.8 °C	17.2 °C	-34.6 °C	0	0	27
December	-2.4 °C	-11.7 °C	-7.9 °C	11.4 °C	-38.3 °C	0	0	30

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	12 mm	3	8.4 h/day	63 %	69 %	16 km/h
February	12 mm	4	10.0 h/day	60 %	66 %	15 km/h
March	21 mm	5	12 h/day	64 %	63 %	16 km/h
April	38 mm	8	14 h/day	66 %	60 %	17 km/h
May	72 mm	11	16 h/day	62 %	61 %	17 km/h
June	105 mm	14	17 h/day	61 %	67 %	16 km/h
July	62 mm	11	16 h/day	47 %	67 %	15 km/h
August	65 mm	9	15 h/day	47 %	67 %	15 km/h
September	43 mm	7	13 h/day	51 %	66 %	16 km/h
October	26 mm	6	11 h/day	56 %	66 %	16 km/h
November	20 mm	5	8.9 h/day	61 %	68 %	16 km/h
December	14 mm	4	7.9 h/day	60 %	69 %	16 km/h

Where Calgary ranks

Ranking	Position	Value
The coolest places in North America in November	7thof 50	2.6 °C
The coolest places in North America in October	8thof 50	11 °C
The coolest places in North America in September	8thof 50	19 °C
The coolest places in North America in December	9thof 50	-2.4 °C
The coolest places in North America in May	10thof 50	17 °C
The coolest places in North America in June	11thof 50	20 °C

Planning a trip? See the best time to visit Calgary.

QuestionsCommon questions about Calgary’s climate

When is the best time to visit Calgary?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, July is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Calgary get?

In July, the warmest month, daily highs average 23 °C. About 3 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.

How cold does it get in winter?

Nights average -12 °C in January, the coldest month. A normal year has 189 nights below freezing.

Which month is wettest in Calgary?

June, averaging 105 mm over 14 days with rain. The driest month is February with 12 mm. The year as a whole averages 490 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Calgary rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. 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.