Calgary Int'l A Weather Records (CA003031093)

Record envelope, standing records and threshold days for Calgary Int'l A (CA003031093), Alberta, Canada, with 132 years of record.

Key Facts for Calgary Int'l A

Calgary Int'l A (CA003031093) is a weather station in Alberta, Canada at 51.12 latitude and -114.02 longitude, 1,084 m (3,556 ft) above sea level.
The station reports from 1881 to 2012, 132 years of record.
1,464 records set at Calgary Int'l A still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Calgary Int'l A set a daily record low minimum temperature of -36.1 C (-33.0 F) on 24 December 1983.

About the Station

Location: Alberta, Canada, 51.12 latitude, -114.02 longitude.
Elevation: 1,084 m (3,556 ft).
Period of record: 1881 to 2012, 132 years.
Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Calgary Int'l A. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Calgary Int'l A, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.3 C (61.3 F)	-44.4 C (-47.9 F)	n/a	n/a
Feb	18.9 C (66.0 F)	-45.0 C (-49.0 F)	n/a	n/a
Mar	22.8 C (73.0 F)	-37.2 C (-35.0 F)	n/a	n/a
Apr	29.4 C (84.9 F)	-30.0 C (-22.0 F)	n/a	n/a
May	32.2 C (90.0 F)	-16.7 C (1.9 F)	n/a	n/a
Jun	35.0 C (95.0 F)	-3.3 C (26.1 F)	n/a	n/a
Jul	36.1 C (97.0 F)	-0.6 C (30.9 F)	n/a	n/a
Aug	35.6 C (96.1 F)	-2.2 C (28.0 F)	n/a	n/a
Sep	33.3 C (91.9 F)	-13.3 C (8.1 F)	n/a	n/a
Oct	29.4 C (84.9 F)	-22.2 C (-8.0 F)	n/a	n/a
Nov	22.8 C (73.0 F)	-35.0 C (-31.0 F)	n/a	n/a
Dec	19.4 C (66.9 F)	-42.8 C (-45.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Calgary Int'l A still stand. 1954 holds the most, with 43.

Standing records at Calgary Int'l A by the year they were set
Year set	Standing records
1882	12
1884	9
1885	18
1886	15
1887	14
1888	9
1889	28
1890	24
1891	12
1892	18
1893	31
1894	19
1895	15
1896	28
1897	11
1898	13
1899	21
1900	21
1901	7
1902	10
1903	8
1904	7
1905	17
1906	21
1907	11
1908	6
1909	10
1910	22
1911	30
1912	13
1913	13
1914	16
1915	4
1916	18
1917	11
1918	18
1919	31
1920	3
1921	15
1922	12
1923	17
1924	23
1925	17
1926	22
1927	4
1928	17
1929	19
1930	21
1931	11
1932	5
1933	13
1934	28
1935	23
1936	35
1937	8
1938	6
1939	23
1940	16
1941	10
1942	18
1943	24
1944	13
1945	11
1946	7
1947	10
1948	13
1949	7
1950	14
1951	36
1952	4
1953	15
1954	43
1955	18
1956	19
1957	14
1958	8
1959	13
1960	4
1961	14
1962	11
1963	8
1964	8
1965	19
1966	8
1967	11
1968	16
1969	8
1970	11
1971	7
1972	14
1973	7
1974	5
1975	7
1976	7
1977	10
1978	9
1979	11
1980	16
1981	15
1982	2
1983	10

All-Time Record Progression

4 new records

4 all-time records were set at Calgary Int'l A between 3 August 1914 and 6 May 1981. Each dot is a new record.

When Calgary Int'l A set new all-time records
Date	Kind	Detail
1914-08-03	Record high maximum temperature	Record high maximum temperature 35.6 C (96.1 F)
1919-07-15	Record high maximum temperature	Record high maximum temperature 36.1 C (97.0 F)
1927-07-15	Record daily precipitation	Record daily precipitation 95.3 mm (3.8 in)
1981-05-06	Record daily snowfall	Record daily snowfall 48.4 cm (19.1 in)

Wettest Day of Each Month

Jul: 95.3 mm (3.8 in)

The wettest day on record for each calendar month at Calgary Int'l A. The most was 95.3 mm (3.8 in) on 15 July 1927.

Record daily precipitation for each month at Calgary Int'l A
Month	Record daily precipitation (mm)	Date
Jan	25.4 mm (1.0 in)	3 January 1913
Feb	27.7 mm (1.1 in)	10 February 1951
Mar	24.1 mm (0.9 in)	13 March 1889
Apr	45.7 mm (1.8 in)	21 April 1932
May	65.0 mm (2.6 in)	18 May 1902
Jun	79.2 mm (3.1 in)	1 June 1932
Jul	95.3 mm (3.8 in)	15 July 1927
Aug	80.8 mm (3.2 in)	25 August 1945
Sep	67.3 mm (2.6 in)	7 September 1926
Oct	45.7 mm (1.8 in)	1 October 1915
Nov	35.6 mm (1.4 in)	13 November 1914
Dec	21.8 mm (0.9 in)	11 December 1889

Period of Record Coverage

1881 to 1983

102 years of record at Calgary Int'l A, 1881 to 1983. 3 years have data for under 90 percent of days and are left out of rankings: 1881, 1882, 1884.

Days with data per year at Calgary Int'l A
Year	Days with data	Share of year	Complete
1881	67	18%	No
1882	117	32%	No
1884	184	50%	No
1885	356	98%	Yes
1886	365	100%	Yes
1887	365	100%	Yes
1888	366	100%	Yes
1889	365	100%	Yes
1890	365	100%	Yes
1891	365	100%	Yes
1892	366	100%	Yes
1893	365	100%	Yes
1894	365	100%	Yes
1895	365	100%	Yes
1896	366	100%	Yes
1897	365	100%	Yes
1898	365	100%	Yes
1899	365	100%	Yes
1900	365	100%	Yes
1901	365	100%	Yes
1902	365	100%	Yes
1903	365	100%	Yes
1904	366	100%	Yes
1905	365	100%	Yes
1906	365	100%	Yes
1907	365	100%	Yes
1908	366	100%	Yes
1909	365	100%	Yes
1910	365	100%	Yes
1911	365	100%	Yes
1912	366	100%	Yes
1913	364	100%	Yes
1914	365	100%	Yes
1915	365	100%	Yes
1916	366	100%	Yes
1917	365	100%	Yes
1918	364	100%	Yes
1919	365	100%	Yes
1920	366	100%	Yes
1921	365	100%	Yes
1922	365	100%	Yes
1923	365	100%	Yes
1924	366	100%	Yes
1925	365	100%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	366	100%	Yes
1929	365	100%	Yes
1930	365	100%	Yes
1931	364	100%	Yes
1932	364	99%	Yes
1933	364	100%	Yes
1934	365	100%	Yes
1935	365	100%	Yes
1936	365	100%	Yes
1937	364	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	366	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	364	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	364	100%	Yes
1968	365	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes

Latest Records

Latest records at Calgary Int'l A
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
24 December 1983	Calgary Int'l A, CA	daily low min	-36.1 C (-33.0 F)	0.5 C (0.9 F)	98 years	39 of 100 (Notable)
30 September 1983	Calgary Int'l A, CA	daily low min	-8.6 C (16.5 F)	1.4 C (2.5 F)	34 years	23 of 100 (Routine)
26 September 1983	Calgary Int'l A, CA	daily high min	10.5 C (50.9 F)	0.3 C (0.5 F)	4 years	11 of 100 (Routine)
19 September 1983	Calgary Int'l A, CA	daily low min	-3.6 C (25.5 F)	0.3 C (0.5 F)	48 years	24 of 100 (Routine)
31 August 1983	Calgary Int'l A, CA	daily high min	13.1 C (55.6 F)	0.3 C (0.5 F)	42 years	22 of 100 (Routine)
11 August 1983	Calgary Int'l A, CA	daily high min	14.4 C (57.9 F)	0.5 C (0.9 F)	54 years	27 of 100 (Routine)
8 August 1983	Calgary Int'l A, CA	daily high min	16.1 C (61.0 F)	0.5 C (0.9 F)	12 years	14 of 100 (Routine)
6 August 1983	Calgary Int'l A, CA	daily high max	33.6 C (92.5 F)	1.4 C (2.5 F)	12 years	15 of 100 (Routine)
11 May 1983	Calgary Int'l A, CA	daily low min	-5.8 C (21.6 F)	0.8 C (1.4 F)	88 years	38 of 100 (Notable)
24 April 1983	Calgary Int'l A, CA	daily high min	6.5 C (43.7 F)	1.5 C (2.7 F)	94 years	41 of 100 (Notable)
24 April 1983	Calgary Int'l A, CA	daily rain	23.3 mm (0.9 in)	9.3 mm (0.37 in)	22 years	20 of 100 (Routine)
26 September 1982	Calgary Int'l A, CA	daily rain	24.8 mm (1.0 in)	7.0 mm (0.28 in)	44 years	20 of 100 (Routine)
22 September 1982	Calgary Int'l A, CA	daily high min	11.0 C (51.8 F)	1.6 C (2.9 F)	16 years	18 of 100 (Routine)
8 September 1982	Calgary Int'l A, CA	daily high min	12.0 C (53.6 F)	0.1 C (0.2 F)	0 years	10 of 100 (Routine)
4 July 1982	Calgary Int'l A, CA	daily low max (Tie)	12.8 C (55.0 F)	tie	71 years	7 of 100 (Routine)
7 May 1982	Calgary Int'l A, CA	daily snowfall	19.2 cm (7.6 in)	6.5 cm (2.6 in)	92 years	45 of 100 (Notable)
12 January 1982	Calgary Int'l A, CA	daily snowfall (Tie)	3.8 cm (1.5 in)	tie	62 years	7 of 100 (Routine)
19 September 1981	Calgary Int'l A, CA	daily rain	26.4 mm (1.0 in)	3.5 mm (0.14 in)	85 years	40 of 100 (Notable)
18 September 1981	Calgary Int'l A, CA	daily high max	32.2 C (90.0 F)	1.1 C (2.0 F)	43 years	23 of 100 (Routine)
17 September 1981	Calgary Int'l A, CA	daily high max	31.3 C (88.3 F)	2.4 C (4.3 F)	64 years	32 of 100 (Routine)

Climate Trend

98 complete years, 1885 to 1983

One stripe for each of 98 complete years at Calgary Int'l A, 1885 to 1983. Blue stripes are years cooler than the station's own mean of 3.6 C (38.4 F); red stripes are warmer. The coolest year was 1951, at 1.2 C (34.1 F), and the warmest was 1981, at 5.8 C (42.5 F). The strongest colour marks a difference of 2.5 C (4.5 F).

Annual mean temperature at Calgary Int'l A as warming stripes, 1885 to 1983
Year	Annual mean temperature	Difference from the station mean
1885	4.3 C	+0.69 C
1886	3.3 C	-0.26 C
1887	1.2 C	-2.35 C
1888	2.7 C	-0.92 C
1889	4.7 C	+1.15 C
1890	2.8 C	-0.78 C
1891	3.8 C	+0.25 C
1892	3.4 C	-0.16 C
1894	3.8 C	+0.22 C
1895	2.9 C	-0.69 C
1896	2.2 C	-1.42 C
1897	2.8 C	-0.75 C
1898	3.2 C	-0.42 C
1899	1.5 C	-2.10 C
1900	3.6 C	+0.05 C
1901	4.0 C	+0.40 C
1902	2.7 C	-0.85 C
1903	3.1 C	-0.50 C
1904	2.7 C	-0.86 C
1905	3.9 C	+0.33 C
1906	4.1 C	+0.48 C
1907	2.6 C	-0.96 C
1908	4.7 C	+1.07 C
1909	2.3 C	-1.28 C
1910	4.7 C	+1.11 C
1911	2.0 C	-1.57 C
1912	4.1 C	+0.55 C
1913	4.5 C	+0.87 C
1914	4.8 C	+1.17 C
1915	5.4 C	+1.85 C
1916	3.0 C	-0.57 C
1917	3.4 C	-0.21 C
1918	5.3 C	+1.74 C
1919	4.1 C	+0.53 C
1920	3.9 C	+0.32 C
1921	4.3 C	+0.69 C
1922	3.9 C	+0.31 C
1923	4.9 C	+1.33 C
1924	4.0 C	+0.38 C
1925	4.2 C	+0.60 C
1926	5.0 C	+1.45 C
1927	2.1 C	-1.52 C
1928	5.2 C	+1.65 C
1929	3.7 C	+0.07 C
1930	4.6 C	+1.04 C
1931	5.4 C	+1.80 C
1932	3.1 C	-0.49 C
1933	3.0 C	-0.61 C
1934	5.4 C	+1.81 C
1935	2.9 C	-0.73 C
1936	3.0 C	-0.59 C
1937	2.7 C	-0.87 C
1938	4.5 C	+0.94 C
1939	4.3 C	+0.72 C
1940	3.6 C	+0.06 C
1941	4.8 C	+1.26 C
1942	3.9 C	+0.31 C
1943	4.4 C	+0.84 C
1944	4.9 C	+1.33 C
1945	2.8 C	-0.77 C
1946	4.1 C	+0.55 C
1947	3.6 C	+0.04 C
1948	3.0 C	-0.63 C
1949	3.2 C	-0.36 C
1950	1.3 C	-2.30 C
1951	1.2 C	-2.41 C
1952	3.9 C	+0.28 C
1953	4.3 C	+0.74 C
1954	2.9 C	-0.67 C
1955	1.6 C	-2.02 C
1956	2.9 C	-0.66 C
1957	3.4 C	-0.22 C
1958	4.4 C	+0.84 C
1959	3.3 C	-0.29 C
1960	4.1 C	+0.47 C
1961	4.7 C	+1.08 C
1962	4.4 C	+0.86 C
1963	4.9 C	+1.35 C
1964	3.6 C	-0.03 C
1965	2.3 C	-1.25 C
1966	2.4 C	-1.15 C
1967	3.4 C	-0.14 C
1968	3.1 C	-0.46 C
1969	2.5 C	-1.13 C
1970	3.1 C	-0.50 C
1971	3.2 C	-0.38 C
1972	2.0 C	-1.59 C
1973	3.5 C	-0.12 C
1974	4.1 C	+0.49 C
1975	2.8 C	-0.79 C
1976	5.2 C	+1.58 C
1977	4.0 C	+0.45 C
1978	2.7 C	-0.89 C
1979	3.2 C	-0.34 C
1980	4.0 C	+0.37 C
1981	5.8 C	+2.26 C
1982	2.3 C	-1.31 C
1983	4.2 C	+0.66 C

The fitted trend in annual mean temperature here over 1885 to 1983 is 0.01 C (-0.06 to 0.08) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.02 F (-0.11 to 0.15) per decade. The slope is a straight line fitted to 98 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Calgary Int'l A
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.01 C (-0.06 to 0.08) per decade	0.02 F (-0.11 to 0.15) per decade	1885 to 1983	98	Not clearly different from zero
Mean daily maximum	-0.07 C (-0.17 to 0.02) per decade	-0.13 F (-0.30 to 0.03) per decade	1885 to 1983	98	Not clearly different from zero
Mean daily minimum	0.09 C (0.03 to 0.16) per decade	0.17 F (0.05 to 0.29) per decade	1885 to 1983	98	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1881 to 1983

Yearly extremes at Calgary Int'l A: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.1 C (97.0 F)	1919	32.5 C (90.5 F)	102
Coldest night (TNn)	-45.0 C (-49.0 F)	1893	-35.3 C (-31.5 F)	102
Wettest day (Rx1day)	95.3 mm (3.8 in)	1927	33.8 mm (1.3 in)	102
Wettest five days (Rx5day)	154.0 mm (6.1 in)	1927	57.7 mm (2.3 in)	102
Longest dry spell (CDD)	96 days	1892	34 days	102

Hottest day (TXx)

The hottest day of the year at Calgary Int'l A, 1881 to 1983. The record is 36.1 C (97.0 F) in 1919, marked on the chart; the median year is 32.5 C (90.5 F).

Hottest day (TXx) at Calgary Int'l A by year
Year	Hottest day (TXx)
1881	12.8 C (55.0 F)
1882	28.9 C (84.0 F)
1884	30.0 C (86.0 F)
1885	30.6 C (87.1 F)
1886	34.4 C (93.9 F)
1887	32.2 C (90.0 F)
1888	33.3 C (91.9 F)
1889	31.7 C (89.1 F)
1890	34.4 C (93.9 F)
1891	31.1 C (88.0 F)
1892	33.3 C (91.9 F)
1893	35.0 C (95.0 F)
1894	33.3 C (91.9 F)
1895	31.7 C (89.1 F)
1896	35.0 C (95.0 F)
1897	32.2 C (90.0 F)
1898	34.4 C (93.9 F)
1899	31.7 C (89.1 F)
1900	33.3 C (91.9 F)
1901	29.4 C (84.9 F)
1902	28.9 C (84.0 F)
1903	28.9 C (84.0 F)
1904	34.4 C (93.9 F)
1905	32.8 C (91.0 F)
1906	33.3 C (91.9 F)
1907	28.9 C (84.0 F)
1908	31.7 C (89.1 F)
1909	28.9 C (84.0 F)
1910	33.3 C (91.9 F)
1911	31.1 C (88.0 F)
1912	32.2 C (90.0 F)
1913	32.2 C (90.0 F)
1914	35.6 C (96.1 F)
1915	31.1 C (88.0 F)
1916	30.6 C (87.1 F)
1917	32.8 C (91.0 F)
1918	34.4 C (93.9 F)
1919	36.1 C (97.0 F)
1920	33.3 C (91.9 F)
1921	35.0 C (95.0 F)
1922	35.0 C (95.0 F)
1923	32.8 C (91.0 F)
1924	33.9 C (93.0 F)
1925	33.9 C (93.0 F)
1926	35.0 C (95.0 F)
1927	29.4 C (84.9 F)
1928	32.2 C (90.0 F)
1929	33.9 C (93.0 F)
1930	34.4 C (93.9 F)
1931	32.8 C (91.0 F)
1932	30.6 C (87.1 F)
1933	36.1 C (97.0 F)
1934	34.4 C (93.9 F)
1935	33.3 C (91.9 F)
1936	35.6 C (96.1 F)
1937	34.4 C (93.9 F)
1938	33.9 C (93.0 F)
1939	34.4 C (93.9 F)
1940	33.9 C (93.0 F)
1941	35.0 C (95.0 F)
1942	30.6 C (87.1 F)
1943	31.7 C (89.1 F)
1944	31.7 C (89.1 F)
1945	31.1 C (88.0 F)
1946	33.3 C (91.9 F)
1947	31.7 C (89.1 F)
1948	31.1 C (88.0 F)
1949	31.1 C (88.0 F)
1950	31.1 C (88.0 F)
1951	31.7 C (89.1 F)
1952	30.0 C (86.0 F)
1953	31.1 C (88.0 F)
1954	30.6 C (87.1 F)
1955	31.7 C (89.1 F)
1956	31.1 C (88.0 F)
1957	29.4 C (84.9 F)
1958	31.7 C (89.1 F)
1959	34.4 C (93.9 F)
1960	33.9 C (93.0 F)
1961	35.0 C (95.0 F)
1962	33.3 C (91.9 F)
1963	30.6 C (87.1 F)
1964	33.3 C (91.9 F)
1965	31.1 C (88.0 F)
1966	31.1 C (88.0 F)
1967	33.3 C (91.9 F)
1968	32.8 C (91.0 F)
1969	32.2 C (90.0 F)
1970	33.9 C (93.0 F)
1971	35.0 C (95.0 F)
1972	31.1 C (88.0 F)
1973	32.8 C (91.0 F)
1974	32.2 C (90.0 F)
1975	33.9 C (93.0 F)
1976	30.6 C (87.1 F)
1977	33.1 C (91.6 F)
1978	31.4 C (88.5 F)
1979	34.3 C (93.7 F)
1980	29.7 C (85.5 F)
1981	32.2 C (90.0 F)
1982	30.0 C (86.0 F)
1983	34.5 C (94.1 F)

Coldest night (TNn)

The coldest night of the year at Calgary Int'l A, 1881 to 1983. The record is -45.0 C (-49.0 F) in 1893, marked on the chart; the median year is -35.3 C (-31.5 F).

Coldest night (TNn) at Calgary Int'l A by year
Year	Coldest night (TNn)
1881	-30.6 C (-23.1 F)
1882	-40.6 C (-41.1 F)
1884	-39.4 C (-38.9 F)
1885	-37.2 C (-35.0 F)
1886	-40.0 C (-40.0 F)
1887	-41.7 C (-43.1 F)
1888	-35.0 C (-31.0 F)
1889	-32.2 C (-26.0 F)
1890	-39.4 C (-38.9 F)
1891	-37.8 C (-36.0 F)
1892	-36.7 C (-34.1 F)
1893	-45.0 C (-49.0 F)
1894	-35.6 C (-32.1 F)
1895	-38.9 C (-38.0 F)
1896	-37.8 C (-36.0 F)
1897	-38.3 C (-36.9 F)
1898	-35.0 C (-31.0 F)
1899	-40.0 C (-40.0 F)
1900	-34.4 C (-29.9 F)
1901	-37.2 C (-35.0 F)
1902	-34.4 C (-29.9 F)
1903	-31.7 C (-25.1 F)
1904	-32.2 C (-26.0 F)
1905	-40.0 C (-40.0 F)
1906	-35.6 C (-32.1 F)
1907	-40.0 C (-40.0 F)
1908	-28.9 C (-20.0 F)
1909	-41.1 C (-42.0 F)
1910	-35.6 C (-32.1 F)
1911	-42.2 C (-44.0 F)
1912	-34.4 C (-29.9 F)
1913	-33.3 C (-27.9 F)
1914	-33.9 C (-29.0 F)
1915	-31.1 C (-24.0 F)
1916	-40.6 C (-41.1 F)
1917	-38.9 C (-38.0 F)
1918	-33.3 C (-27.9 F)
1919	-36.1 C (-33.0 F)
1920	-36.7 C (-34.1 F)
1921	-35.0 C (-31.0 F)
1922	-34.4 C (-29.9 F)
1923	-39.4 C (-38.9 F)
1924	-42.8 C (-45.0 F)
1925	-30.0 C (-22.0 F)
1926	-30.6 C (-23.1 F)
1927	-35.6 C (-32.1 F)
1928	-34.4 C (-29.9 F)
1929	-42.8 C (-45.0 F)
1930	-38.9 C (-38.0 F)
1931	-26.7 C (-16.1 F)
1932	-34.4 C (-29.9 F)
1933	-32.2 C (-26.0 F)
1934	-33.3 C (-27.9 F)
1935	-38.9 C (-38.0 F)
1936	-37.8 C (-36.0 F)
1937	-35.6 C (-32.1 F)
1938	-34.4 C (-29.9 F)
1939	-41.1 C (-42.0 F)
1940	-32.2 C (-26.0 F)
1941	-31.7 C (-25.1 F)
1942	-31.1 C (-24.0 F)
1943	-43.3 C (-45.9 F)
1944	-28.9 C (-20.0 F)
1945	-31.1 C (-24.0 F)
1946	-31.1 C (-24.0 F)
1947	-37.8 C (-36.0 F)
1948	-32.8 C (-27.0 F)
1949	-37.2 C (-35.0 F)
1950	-40.6 C (-41.1 F)
1951	-37.2 C (-35.0 F)
1952	-35.0 C (-31.0 F)
1953	-29.4 C (-20.9 F)
1954	-40.0 C (-40.0 F)
1955	-36.1 C (-33.0 F)
1956	-35.0 C (-31.0 F)
1957	-36.7 C (-34.1 F)
1958	-32.2 C (-26.0 F)
1959	-30.0 C (-22.0 F)
1960	-32.2 C (-26.0 F)
1961	-29.4 C (-20.9 F)
1962	-32.2 C (-26.0 F)
1963	-33.3 C (-27.9 F)
1964	-33.9 C (-29.0 F)
1965	-35.0 C (-31.0 F)
1966	-35.6 C (-32.1 F)
1967	-31.7 C (-25.1 F)
1968	-38.9 C (-38.0 F)
1969	-38.9 C (-38.0 F)
1970	-38.9 C (-38.0 F)
1971	-36.1 C (-33.0 F)
1972	-37.8 C (-36.0 F)
1973	-31.7 C (-25.1 F)
1974	-32.2 C (-26.0 F)
1975	-35.0 C (-31.0 F)
1976	-32.8 C (-27.0 F)
1977	-36.7 C (-34.1 F)
1978	-33.7 C (-28.7 F)
1979	-33.8 C (-28.8 F)
1980	-34.1 C (-29.4 F)
1981	-30.9 C (-23.6 F)
1982	-35.6 C (-32.1 F)
1983	-36.5 C (-33.7 F)

Wettest day (Rx1day)

The wettest day of the year at Calgary Int'l A, 1881 to 1983. The record is 95.3 mm (3.8 in) in 1927, marked on the chart; the median year is 33.8 mm (1.3 in).

Wettest day (Rx1day) at Calgary Int'l A by year
Year	Wettest day (Rx1day)
1881	4.6 mm (0.18 in)
1882	23.6 mm (0.9 in)
1884	50.0 mm (2.0 in)
1885	53.3 mm (2.1 in)
1886	34.0 mm (1.3 in)
1887	32.5 mm (1.3 in)
1888	38.1 mm (1.5 in)
1889	24.1 mm (0.9 in)
1890	25.1 mm (1.0 in)
1891	24.9 mm (1.0 in)
1892	30.5 mm (1.2 in)
1893	17.8 mm (0.7 in)
1894	40.6 mm (1.6 in)
1895	33.5 mm (1.3 in)
1896	30.5 mm (1.2 in)
1897	29.7 mm (1.2 in)
1898	32.3 mm (1.3 in)
1899	67.6 mm (2.7 in)
1900	37.6 mm (1.5 in)
1901	72.6 mm (2.9 in)
1902	70.6 mm (2.8 in)
1903	57.9 mm (2.3 in)
1904	24.4 mm (1.0 in)
1905	56.9 mm (2.2 in)
1906	41.1 mm (1.6 in)
1907	20.8 mm (0.8 in)
1908	47.8 mm (1.9 in)
1909	43.7 mm (1.7 in)
1910	23.9 mm (0.9 in)
1911	37.6 mm (1.5 in)
1912	37.1 mm (1.5 in)
1913	25.4 mm (1.0 in)
1914	35.6 mm (1.4 in)
1915	45.7 mm (1.8 in)
1916	17.3 mm (0.7 in)
1917	16.8 mm (0.7 in)
1918	18.8 mm (0.7 in)
1919	59.2 mm (2.3 in)
1920	38.4 mm (1.5 in)
1921	17.8 mm (0.7 in)
1922	27.4 mm (1.1 in)
1923	40.1 mm (1.6 in)
1924	42.7 mm (1.7 in)
1925	32.3 mm (1.3 in)
1926	67.3 mm (2.6 in)
1927	95.3 mm (3.8 in)
1928	77.2 mm (3.0 in)
1929	25.4 mm (1.0 in)
1930	32.3 mm (1.3 in)
1931	20.8 mm (0.8 in)
1932	79.2 mm (3.1 in)
1933	27.9 mm (1.1 in)
1934	43.7 mm (1.7 in)
1935	26.7 mm (1.1 in)
1936	16.8 mm (0.7 in)
1937	24.9 mm (1.0 in)
1938	42.7 mm (1.7 in)
1939	43.2 mm (1.7 in)
1940	29.2 mm (1.1 in)
1941	37.3 mm (1.5 in)
1942	55.1 mm (2.2 in)
1943	23.4 mm (0.9 in)
1944	38.6 mm (1.5 in)
1945	80.8 mm (3.2 in)
1946	40.6 mm (1.6 in)
1947	41.7 mm (1.6 in)
1948	30.0 mm (1.2 in)
1949	20.6 mm (0.8 in)
1950	67.6 mm (2.7 in)
1951	32.3 mm (1.3 in)
1952	43.7 mm (1.7 in)
1953	27.7 mm (1.1 in)
1954	75.9 mm (3.0 in)
1955	30.5 mm (1.2 in)
1956	36.3 mm (1.4 in)
1957	23.9 mm (0.9 in)
1958	30.7 mm (1.2 in)
1959	57.2 mm (2.3 in)
1960	19.6 mm (0.8 in)
1961	37.3 mm (1.5 in)
1962	29.0 mm (1.1 in)
1963	42.7 mm (1.7 in)
1964	40.1 mm (1.6 in)
1965	50.8 mm (2.0 in)
1966	54.9 mm (2.2 in)
1967	17.5 mm (0.7 in)
1968	39.9 mm (1.6 in)
1969	30.5 mm (1.2 in)
1970	75.9 mm (3.0 in)
1971	32.3 mm (1.3 in)
1972	35.3 mm (1.4 in)
1973	24.9 mm (1.0 in)
1974	29.5 mm (1.2 in)
1975	16.3 mm (0.6 in)
1976	30.0 mm (1.2 in)
1977	27.1 mm (1.1 in)
1978	55.3 mm (2.2 in)
1979	26.0 mm (1.0 in)
1980	38.2 mm (1.5 in)
1981	51.8 mm (2.0 in)
1982	24.8 mm (1.0 in)
1983	32.4 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Calgary Int'l A, 1881 to 1983. The record is 154.0 mm (6.1 in) in 1927, marked on the chart; the median year is 57.7 mm (2.3 in).

Wettest five days (Rx5day) at Calgary Int'l A by year
Year	Wettest five days (Rx5day)
1881	5.4 mm (0.21 in)
1882	50.3 mm (2.0 in)
1884	87.4 mm (3.4 in)
1885	73.7 mm (2.9 in)
1886	81.8 mm (3.2 in)
1887	53.6 mm (2.1 in)
1888	43.8 mm (1.7 in)
1889	39.1 mm (1.5 in)
1890	39.4 mm (1.6 in)
1891	37.4 mm (1.5 in)
1892	31.5 mm (1.2 in)
1893	34.7 mm (1.4 in)
1894	56.3 mm (2.2 in)
1895	64.3 mm (2.5 in)
1896	42.0 mm (1.7 in)
1897	100.3 mm (3.9 in)
1898	73.7 mm (2.9 in)
1899	103.6 mm (4.1 in)
1900	54.3 mm (2.1 in)
1901	89.9 mm (3.5 in)
1902	144.6 mm (5.7 in)
1903	94.5 mm (3.7 in)
1904	28.5 mm (1.1 in)
1905	68.9 mm (2.7 in)
1906	96.6 mm (3.8 in)
1907	33.8 mm (1.3 in)
1908	83.9 mm (3.3 in)
1909	56.9 mm (2.2 in)
1910	41.2 mm (1.6 in)
1911	71.2 mm (2.8 in)
1912	58.5 mm (2.3 in)
1913	47.0 mm (1.9 in)
1914	46.2 mm (1.8 in)
1915	53.3 mm (2.1 in)
1916	31.8 mm (1.3 in)
1917	23.9 mm (0.9 in)
1918	32.2 mm (1.3 in)
1919	76.7 mm (3.0 in)
1920	56.8 mm (2.2 in)
1921	30.5 mm (1.2 in)
1922	40.2 mm (1.6 in)
1923	104.9 mm (4.1 in)
1924	89.7 mm (3.5 in)
1925	67.8 mm (2.7 in)
1926	119.6 mm (4.7 in)
1927	154.0 mm (6.1 in)
1928	104.3 mm (4.1 in)
1929	51.3 mm (2.0 in)
1930	52.6 mm (2.1 in)
1931	33.0 mm (1.3 in)
1932	95.0 mm (3.7 in)
1933	45.7 mm (1.8 in)
1934	59.9 mm (2.4 in)
1935	50.6 mm (2.0 in)
1936	28.6 mm (1.1 in)
1937	46.2 mm (1.8 in)
1938	56.4 mm (2.2 in)
1939	104.4 mm (4.1 in)
1940	53.6 mm (2.1 in)
1941	62.2 mm (2.4 in)
1942	76.3 mm (3.0 in)
1943	34.5 mm (1.4 in)
1944	59.9 mm (2.4 in)
1945	86.5 mm (3.4 in)
1946	45.0 mm (1.8 in)
1947	64.3 mm (2.5 in)
1948	65.7 mm (2.6 in)
1949	22.6 mm (0.9 in)
1950	68.2 mm (2.7 in)
1951	88.6 mm (3.5 in)
1952	54.6 mm (2.1 in)
1953	59.4 mm (2.3 in)
1954	120.7 mm (4.8 in)
1955	40.4 mm (1.6 in)
1956	74.7 mm (2.9 in)
1957	38.6 mm (1.5 in)
1958	67.6 mm (2.7 in)
1959	85.9 mm (3.4 in)
1960	43.4 mm (1.7 in)
1961	66.4 mm (2.6 in)
1962	29.6 mm (1.2 in)
1963	54.4 mm (2.1 in)
1964	71.9 mm (2.8 in)
1965	72.7 mm (2.9 in)
1966	76.5 mm (3.0 in)
1967	27.5 mm (1.1 in)
1968	55.9 mm (2.2 in)
1969	79.0 mm (3.1 in)
1970	109.5 mm (4.3 in)
1971	76.0 mm (3.0 in)
1972	65.1 mm (2.6 in)
1973	59.2 mm (2.3 in)
1974	49.5 mm (1.9 in)
1975	42.5 mm (1.7 in)
1976	50.0 mm (2.0 in)
1977	35.3 mm (1.4 in)
1978	83.6 mm (3.3 in)
1979	34.9 mm (1.4 in)
1980	86.5 mm (3.4 in)
1981	76.3 mm (3.0 in)
1982	59.7 mm (2.4 in)
1983	38.3 mm (1.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Calgary Int'l A, 1881 to 1983. The record is 96 days in 1892, marked on the chart; the median year is 34 days.

Longest dry spell (CDD) at Calgary Int'l A by year
Year	Longest dry spell (CDD)
1881	16 days
1882	20 days
1884	61 days
1885	71 days
1886	37 days
1887	39 days
1888	38 days
1889	53 days
1890	27 days
1891	59 days
1892	96 days
1893	29 days
1894	55 days
1895	29 days
1896	21 days
1897	34 days
1898	31 days
1899	29 days
1900	40 days
1901	28 days
1902	30 days
1903	43 days
1904	36 days
1905	34 days
1906	40 days
1907	35 days
1908	38 days
1909	26 days
1910	37 days
1911	35 days
1912	41 days
1913	43 days
1914	30 days
1915	60 days
1916	16 days
1917	34 days
1918	22 days
1919	40 days
1920	38 days
1921	31 days
1922	54 days
1923	63 days
1924	24 days
1925	26 days
1926	28 days
1927	36 days
1928	32 days
1929	25 days
1930	29 days
1931	39 days
1932	20 days
1933	38 days
1934	31 days
1935	43 days
1936	40 days
1937	34 days
1938	34 days
1939	41 days
1940	31 days
1941	61 days
1942	25 days
1943	34 days
1944	31 days
1945	22 days
1946	29 days
1947	14 days
1948	47 days
1949	55 days
1950	29 days
1951	20 days
1952	41 days
1953	43 days
1954	40 days
1955	29 days
1956	29 days
1957	22 days
1958	31 days
1959	24 days
1960	37 days
1961	27 days
1962	29 days
1963	50 days
1964	43 days
1965	31 days
1966	28 days
1967	56 days
1968	58 days
1969	34 days
1970	22 days
1971	36 days
1972	25 days
1973	33 days
1974	29 days
1975	30 days
1976	32 days
1977	47 days
1978	26 days
1979	27 days
1980	42 days
1981	28 days
1982	24 days
1983	25 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

98 years with a frost

Across 98 years with a frost, the median last spring frost at Calgary Int'l A falls on 28 May and the median first autumn frost on 9 September, which leaves a median of 105 days between them.

In 1954 to 1983 the median growing season was 114 days. That is 19 days more than in 1885 to 1915.

Fitted over all years, the growing season changes by +3.5 days per decade at this station.

Frost dates and growing season at Calgary Int'l A
Measure	Median, all years	Earliest period (1885 to 1915)	Recent period (1954 to 1983)	Recent against earliest	Fitted trend
Last spring frost	28 May	3 June	22 May	12 days earlier	-1.5 days per decade
First autumn frost	9 September	4 September	13 September	9 days later	+2.0 days per decade
Growing days	105 days	95 days	114 days	19 days more	+3.5 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

99 years, 1885 to 1983

A day with at least 34.7 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 101.0 mm (4.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Calgary Int'l A: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	34.7 mm (1.4 in)
5 years	49.4 mm (1.9 in)
10 years	60.3 mm (2.4 in)
25 years	75.4 mm (3.0 in)
50 years	87.7 mm (3.5 in)
100 years	101.0 mm (4.0 in)	Longer than the 99 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 99 years of values from 1885 to 1983.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 95.3 mm (3.8 in) in 1927; 80.8 mm (3.2 in) in 1945; 79.2 mm (3.1 in) in 1932.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Calgary Int'l A, at 1931 and 1970. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1931 ran 0.6 C (1.0 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1970 ran 0.3 C (0.5 F) higher than in the years before (likely change).

Suspected changes in the annual mean temperature at Calgary Int'l A, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1931	-0.6	-1.0	likely	5
1970	+0.3	+0.5	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

Data for Calgary Int'l A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Calgary Int'l A threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).