Canada · 1991–2020

Best time to visit
Calgary.

July leads for comfortable weather in Calgary: typically 24.2°C by day, 10.5°C at night, with 52 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high24.2°C

Typical low10.5°C

Rain in July52 mm

Comfort

July

July · August · September

85climate match

Beach

July

July · August · September

49climate match

Outdoors

September

September · August · July

83climate match

The weakest month is January, scoring 5 against July’s 85 — days reach only 0.1°C, 24° below the 24°C the score treats as ideal, and nights drop to -11.5°C.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

50.1° / -11.5°

Feb

5-0.7° / -12.3°

Mar

53.6° / -8°

Apr

2310.4° / -2.1°

May

4916.6° / 3.2°

Jun

5920° / 7.7°

Jul

8524.2° / 10.5°

Aug

8223.3° / 9.2°

Sep

6118.4° / 4.8°

Oct

2711.3° / -1.4°

Nov

54.2° / -7.7°

Dec

5-0.1° / -11.9°

Monthly climate evidence for Calgary — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.1°C	-11.5°C	8 mm	2.7	8 h 22	5	Good coverage
February	-0.7°C	-12.3°C	11 mm	3.1	9 h 55	5	Good coverage
March	3.6°C	-8°C	16 mm	5	11 h 42	5	Good coverage
April	10.4°C	-2.1°C	24 mm	4.9	13 h 45	23	Good coverage
May	16.6°C	3.2°C	48 mm	6.6	15 h 31	49	Good coverage
June	20°C	7.7°C	97 mm	9.8	16 h 31	59	Good coverage
July	24.2°C	10.5°C	52 mm	7.1	16 h 07	85	Good coverage
August	23.3°C	9.2°C	46 mm	7	14 h 34	82	Good coverage
September	18.4°C	4.8°C	34 mm	6	12 h 34	61	Good coverage
October	11.3°C	-1.4°C	19 mm	4.5	10 h 35	27	Good coverage
November	4.2°C	-7.7°C	12 mm	3	8 h 50	5	Good coverage
December	-0.1°C	-11.9°C	12 mm	3.7	7 h 56	5	Good coverage

Records at CALGARY INT'L CS, 1999–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.2°C7 Jan 2003	-36.8°C14 Jan 2024	9 mm27 Jan 2023	21 mm2015 · driest 0 mm in 2007	26
February	17.3°C5 Feb 2026	-33.4°C11 Feb 2021	14 mm22 Feb 2006	28 mm2006 · driest 0 mm in 2004	26
March	25.8°C30 Mar 2004	-32.4°C2 Mar 2019	11 mm20 Mar 2024	40 mm2005 · driest 0 mm in 2010	26
April	26.9°C19 Apr 2016	-18.2°C2 Apr 2002	27 mm12 Apr 2012	84 mm2003 · driest 0 mm in 2001	26
May	31.6°C17 May 2006	-8.6°C1 May 2013	52 mm24 May 2013	116 mm2013 · driest 0 mm in 2001	26
June	36.2°C29 Jun 2021	-1.7°C1 Jun 2000	63 mm5 Jun 2007	241 mm2005 · driest 25 mm in 2021	26
July	36.1°C1 Jul 2021	3.0°C3 Jul 2000	41 mm11 Jul 2017	120 mm2016 · driest 13 mm in 2005	24
August	36.7°C10 Aug 2018	0.7°C28 Aug 2007	34 mm21 Aug 2015	119 mm2015 · driest 12 mm in 2001	25
September	33.4°C23 Sep 2009	-7.4°C22 Sep 2000	30 mm2 Sep 2000	59 mm2006 · driest 2 mm in 2009	25
October	26.8°C2 Oct 2010	-20.2°C25 Oct 2020	26 mm23 Oct 2021	44 mm2006 · driest 2 mm in 2001	25
November	23.0°C2 Nov 2020	-32.1°C23 Nov 2010	14 mm2 Nov 2005	40 mm2014 · driest 0 mm in 2000	25
December	20.0°C27 Dec 1999	-34.4°C27 Dec 2021	10 mm29 Dec 2002	26 mm2004 · driest 0 mm in 2006	24

Typical days per month at CALGARY INT'L CS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	0	1
February	0	0	26	<1	<1
March	<1	0	27	<1	3
April	<1	0	19	<1	1
May	2	0	6	1	1
June	4	<1	<1	3	0
July	13	3	0	2	0
August	12	2	0	1	0
September	5	<1	3	<1	<1
October	<1	0	18	<1	1
November	0	0	26	<1	1
December	0	0	28	<1	1

How often, not how much — every day in CALGARY INT'L CS’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	8%	0%	4%	-3.9–3.0°C
February	0%	12%	<1%	11%	-6.7–3.7°C
March	<1%	15%	<1%	9%	-1.9–9.2°C
April	9%	15%	2%	16%	7.2–13.7°C
May	32%	21%	4%	25%	14.6–20.0°C
June	47%	32%	11%	42%	18.5–22.3°C
July	71%	23%	5%	22%	21.9–26.5°C
August	66%	22%	4%	24%	21.4–26.1°C
September	44%	19%	2%	16%	16.1–22.2°C
October	12%	14%	1%	12%	8.0–14.6°C
November	<1%	10%	<1%	3%	0.0–8.5°C
December	0%	13%	<1%	6%	-6.4–4.2°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

2001Each stripe is one year’s mean temperature against the 20-year average. Warmest: 2015. Coolest: 2019.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5913490
NOAA station: CA003031094 · CALGARY INT'L CS
Station distance: 8.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 16 usable years
Daylight: Calculated from latitude 51.05°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from CALGARY INT'L CS is what differs

Beltline→Panorama Hills→Saddle Ridge→Coventry Hills→Martindale→Beddington Heights→

Or put two places side by side: Calgary vs Beltline

Best time to visitCalgary.

July

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Calgary.

The whole year,
without the guesswork.

Nearby, measured,
and named.