Fort Macleod Weather Records (CA003032680)

Record envelope, standing records and threshold days for Fort Macleod (CA003032680), Alberta, Canada, with 113 years of record.

Key Facts for Fort Macleod

Fort Macleod (CA003032680) is a weather station in Alberta, Canada at 49.72 latitude and -113.40 longitude, 950 m (3,117 ft) above sea level.
The station reports from 1876 to 1988, 113 years of record.
1,464 records set at Fort Macleod still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Fort Macleod set a daily record low minimum temperature of -37.0 C (-34.6 F) on 25 December 1983.

About the Station

Location: Alberta, Canada, 49.72 latitude, -113.40 longitude.
Elevation: 950 m (3,117 ft).
Period of record: 1876 to 1988, 113 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 Fort Macleod. 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 Fort Macleod, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	19.4 C (66.9 F)	-45.0 C (-49.0 F)	n/a	n/a
Feb	20.0 C (68.0 F)	-45.0 C (-49.0 F)	n/a	n/a
Mar	27.8 C (82.0 F)	-36.7 C (-34.1 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-23.3 C (-9.9 F)	n/a	n/a
May	33.9 C (93.0 F)	-15.0 C (5.0 F)	n/a	n/a
Jun	38.3 C (100.9 F)	-10.0 C (14.0 F)	n/a	n/a
Jul	42.8 C (109.0 F)	0.6 C (33.1 F)	n/a	n/a
Aug	37.2 C (99.0 F)	-2.2 C (28.0 F)	n/a	n/a
Sep	36.7 C (98.1 F)	-17.8 C (0.0 F)	n/a	n/a
Oct	30.0 C (86.0 F)	-23.3 C (-9.9 F)	n/a	n/a
Nov	26.1 C (79.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Dec	25.0 C (77.0 F)	-45.0 C (-49.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Fort Macleod still stand. 1936 holds the most, with 53.

Standing records at Fort Macleod by the year they were set
Year set	Standing records
1876	20
1877	6
1878	1
1879	11
1885	2
1895	16
1896	47
1897	14
1898	12
1899	18
1900	16
1901	8
1902	16
1903	13
1904	25
1905	27
1906	34
1907	22
1908	7
1909	19
1910	27
1911	23
1912	9
1913	16
1914	17
1915	6
1916	15
1917	19
1918	24
1919	37
1920	13
1921	5
1922	19
1923	16
1924	19
1925	22
1926	21
1927	11
1928	22
1929	22
1930	20
1931	20
1932	18
1933	18
1934	29
1935	18
1936	53
1937	8
1938	7
1939	31
1940	15
1941	8
1942	9
1943	22
1944	16
1945	9
1946	6
1947	8
1948	12
1949	24
1950	13
1951	22
1952	14
1953	7
1954	27
1955	20
1956	16
1957	13
1958	8
1959	13
1960	5
1961	12
1962	18
1963	9
1964	8
1965	13
1966	10
1967	16
1968	20
1969	13
1970	7
1971	13
1972	8
1973	19
1974	4
1975	7
1976	10
1977	16
1978	3
1979	4
1980	16
1981	13
1982	4
1983	15

All-Time Record Progression

3 new records

3 all-time records were set at Fort Macleod between 17 July 1925 and 3 August 1951. Each dot is a new record.

When Fort Macleod set new all-time records
Date	Kind	Detail
1925-07-17	Record high minimum temperature	Record high minimum temperature 21.1 C (70.0 F)
1943-01-22	Record low maximum temperature	Record low maximum temperature -35.6 C (-32.1 F)
1951-08-03	Record high minimum temperature	Record high minimum temperature 22.2 C (72.0 F)

Wettest Day of Each Month

Aug: 98.0 mm (3.9 in)

The wettest day on record for each calendar month at Fort Macleod. The most was 98.0 mm (3.9 in) on 9 August 1916.

Record daily precipitation for each month at Fort Macleod
Month	Record daily precipitation (mm)	Date
Jan	16.8 mm (0.7 in)	13 January 1949
Feb	20.3 mm (0.8 in)	19 February 1920
Mar	50.8 mm (2.0 in)	25 March 1972
Apr	76.2 mm (3.0 in)	12 April 1922
May	77.7 mm (3.1 in)	1 May 1951
Jun	97.0 mm (3.8 in)	7 June 1946
Jul	80.0 mm (3.1 in)	18 July 1916
Aug	98.0 mm (3.9 in)	9 August 1916
Sep	73.7 mm (2.9 in)	4 September 1916
Oct	45.7 mm (1.8 in)	5 October 1914
Nov	32.5 mm (1.3 in)	18 November 1946
Dec	25.4 mm (1.0 in)	7 December 1936

Period of Record Coverage

1876 to 1983

94 years of record at Fort Macleod, 1876 to 1983. 10 years have data for under 90 percent of days and are left out of rankings: 1876, 1877, 1879, 1885, 1886, 1895, 1902, 1903 and others.

Days with data per year at Fort Macleod
Year	Days with data	Share of year	Complete
1876	211	58%	No
1877	58	16%	No
1879	196	54%	No
1885	63	17%	No
1886	55	15%	No
1895	153	42%	No
1896	366	100%	Yes
1897	365	100%	Yes
1898	364	100%	Yes
1899	365	100%	Yes
1900	365	100%	Yes
1901	365	100%	Yes
1902	312	85%	No
1903	127	35%	No
1904	364	99%	Yes
1905	365	100%	Yes
1906	365	100%	Yes
1907	365	100%	Yes
1908	364	99%	Yes
1909	365	100%	Yes
1910	365	100%	Yes
1911	365	100%	Yes
1912	365	100%	Yes
1913	365	100%	Yes
1914	365	100%	Yes
1915	365	100%	Yes
1916	366	100%	Yes
1917	365	100%	Yes
1918	365	100%	Yes
1919	364	100%	Yes
1920	366	100%	Yes
1921	365	100%	Yes
1922	364	100%	Yes
1923	363	99%	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	364	100%	Yes
1931	365	100%	Yes
1932	366	100%	Yes
1933	364	100%	Yes
1934	363	99%	Yes
1935	362	99%	Yes
1936	366	100%	Yes
1937	364	100%	Yes
1938	364	100%	Yes
1939	363	99%	Yes
1940	365	100%	Yes
1941	363	99%	Yes
1942	303	83%	No
1943	359	98%	Yes
1944	366	100%	Yes
1945	362	99%	Yes
1946	365	100%	Yes
1947	364	100%	Yes
1948	304	83%	No
1949	363	99%	Yes
1950	364	100%	Yes
1951	363	99%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	364	99%	Yes
1957	365	100%	Yes
1958	364	100%	Yes
1959	364	100%	Yes
1960	366	100%	Yes
1961	358	98%	Yes
1962	363	99%	Yes
1963	364	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	362	99%	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	360	99%	Yes
1982	364	100%	Yes
1983	364	100%	Yes

Latest Records

Latest records at Fort Macleod
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 December 1983	Fort Macleod, CA	daily low min	-37.0 C (-34.6 F)	2.6 C (4.7 F)	18 years	17 of 100 (Routine)
24 December 1983	Fort Macleod, CA	daily low min	-42.5 C (-44.5 F)	5.8 C (10.4 F)	18 years	20 of 100 (Routine)
23 December 1983	Fort Macleod, CA	daily low max	-26.0 C (-14.8 F)	4.9 C (8.8 F)	62 years	33 of 100 (Routine)
23 December 1983	Fort Macleod, CA	daily low min	-35.0 C (-31.0 F)	0.6 C (1.1 F)	62 years	28 of 100 (Routine)
22 December 1983	Fort Macleod, CA	daily low max	-22.0 C (-7.6 F)	1.4 C (2.5 F)	66 years	31 of 100 (Routine)
21 December 1983	Fort Macleod, CA	daily low max	-24.0 C (-11.2 F)	3.4 C (6.1 F)	58 years	30 of 100 (Routine)
19 December 1983	Fort Macleod, CA	daily low min	-34.0 C (-29.2 F)	0.1 C (0.2 F)	58 years	27 of 100 (Routine)
19 December 1983	Fort Macleod, CA	daily low max (Tie)	-20.0 C (-4.0 F)	tie	33 years	5 of 100 (Routine)
31 October 1983	Fort Macleod, CA	daily high min (Tie)	10.0 C (50.0 F)	tie	38 years	5 of 100 (Routine)
26 October 1983	Fort Macleod, CA	daily high max	24.0 C (75.2 F)	0.1 C (0.2 F)	58 years	27 of 100 (Routine)
26 September 1983	Fort Macleod, CA	daily high min	14.0 C (57.2 F)	0.7 C (1.3 F)	83 years	36 of 100 (Notable)
7 September 1983	Fort Macleod, CA	daily low min (Tie)	0.0 C (32.0 F)	tie	81 years	8 of 100 (Routine)
31 August 1983	Fort Macleod, CA	daily high max	32.5 C (90.5 F)	0.3 C (0.5 F)	42 years	22 of 100 (Routine)
11 August 1983	Fort Macleod, CA	daily rain	39.0 mm (1.5 in)	23.0 mm (0.9 in)	50 years	50 of 100 (Notable)
23 June 1983	Fort Macleod, CA	daily rain	16.6 mm (0.7 in)	0.1 mm (0.00 in)	10 years	13 of 100 (Routine)
11 May 1983	Fort Macleod, CA	daily low min (Tie)	-5.0 C (23.0 F)	tie	14 years	3 of 100 (Routine)
25 April 1983	Fort Macleod, CA	daily rain	20.6 mm (0.8 in)	10.4 mm (0.4 in)	68 years	20 of 100 (Routine)
22 April 1983	Fort Macleod, CA	daily high min	8.0 C (46.4 F)	0.2 C (0.4 F)	48 years	24 of 100 (Routine)
2 April 1983	Fort Macleod, CA	daily rain	8.0 mm (0.31 in)	0.4 mm (0.02 in)	4 years	11 of 100 (Routine)
24 February 1983	Fort Macleod, CA	daily high max	18.0 C (64.4 F)	4.7 C (8.5 F)	96 years	43 of 100 (Notable)

Climate Trend

82 complete years, 1896 to 1983

One stripe for each of 82 complete years at Fort Macleod, 1896 to 1983. Blue stripes are years cooler than the station's own mean of 5.5 C (42.0 F); red stripes are warmer. The coolest year was 1916, at 3.2 C (37.7 F), and the warmest was 1934, at 7.8 C (46.1 F). The strongest colour marks a difference of 2.4 C (4.3 F).

Annual mean temperature at Fort Macleod as warming stripes, 1896 to 1983
Year	Annual mean temperature	Difference from the station mean
1896	4.9 C	-0.64 C
1897	5.4 C	-0.10 C
1898	5.7 C	+0.12 C
1899	3.7 C	-1.81 C
1900	6.2 C	+0.61 C
1901	5.8 C	+0.22 C
1904	4.3 C	-1.20 C
1905	5.5 C	-0.03 C
1906	4.6 C	-0.93 C
1907	4.0 C	-1.50 C
1908	5.5 C	-0.09 C
1909	3.8 C	-1.76 C
1910	6.8 C	+1.24 C
1911	3.7 C	-1.87 C
1912	5.8 C	+0.21 C
1913	5.1 C	-0.49 C
1914	4.7 C	-0.83 C
1915	5.6 C	+0.04 C
1916	3.2 C	-2.39 C
1917	4.1 C	-1.44 C
1918	6.5 C	+0.95 C
1919	5.5 C	-0.02 C
1920	5.7 C	+0.13 C
1921	6.1 C	+0.54 C
1922	4.9 C	-0.67 C
1923	6.3 C	+0.75 C
1924	4.9 C	-0.61 C
1925	6.0 C	+0.47 C
1926	6.9 C	+1.37 C
1927	3.9 C	-1.60 C
1928	6.7 C	+1.14 C
1929	4.6 C	-0.93 C
1930	6.5 C	+0.93 C
1931	7.8 C	+2.26 C
1932	5.6 C	+0.01 C
1933	5.7 C	+0.18 C
1934	7.8 C	+2.29 C
1935	5.7 C	+0.13 C
1936	5.3 C	-0.25 C
1937	4.8 C	-0.73 C
1938	6.9 C	+1.32 C
1939	7.3 C	+1.80 C
1940	6.8 C	+1.29 C
1941	7.4 C	+1.81 C
1943	6.3 C	+0.78 C
1944	7.7 C	+2.11 C
1945	5.3 C	-0.21 C
1946	6.1 C	+0.58 C
1947	6.0 C	+0.41 C
1950	4.7 C	-0.89 C
1952	6.3 C	+0.80 C
1953	6.9 C	+1.32 C
1954	5.2 C	-0.38 C
1955	3.4 C	-2.17 C
1956	5.1 C	-0.42 C
1957	5.4 C	-0.19 C
1958	6.3 C	+0.80 C
1959	5.0 C	-0.58 C
1960	5.9 C	+0.36 C
1961	6.5 C	+0.98 C
1962	5.8 C	+0.27 C
1963	6.6 C	+1.07 C
1964	5.1 C	-0.43 C
1965	4.4 C	-1.11 C
1966	4.8 C	-0.79 C
1967	5.8 C	+0.21 C
1968	5.2 C	-0.32 C
1969	4.6 C	-0.98 C
1970	5.2 C	-0.37 C
1971	5.1 C	-0.41 C
1972	4.0 C	-1.57 C
1973	6.2 C	+0.61 C
1974	6.5 C	+0.99 C
1975	4.5 C	-1.06 C
1976	6.9 C	+1.36 C
1977	5.9 C	+0.38 C
1978	4.1 C	-1.44 C
1979	5.3 C	-0.23 C
1980	5.9 C	+0.36 C
1981	7.4 C	+1.81 C
1982	3.9 C	-1.60 C
1983	5.9 C	+0.38 C

The fitted trend in annual mean temperature here over 1896 to 1983 is 0.05 C (-0.05 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 82 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Fort Macleod
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.05 C (-0.05 to 0.14) per decade	0.1 F (-0.1 to 0.2) per decade	1896 to 1983	82	Not clearly different from zero
Mean daily maximum	0.02 C (-0.07 to 0.12) per decade	0.04 F (-0.13 to 0.22) per decade	1896 to 1983	82	Not clearly different from zero
Mean daily minimum	0.07 C (-0.04 to 0.17) per decade	0.1 F (-0.1 to 0.3) per decade	1896 to 1983	82	Not clearly different from zero

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

1876 to 1983

Yearly extremes at Fort Macleod: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	42.8 C (109.0 F)	1877	35.0 C (95.0 F)	94
Coldest night (TNn)	-45.0 C (-49.0 F)	1905	-35.6 C (-32.1 F)	95
Wettest day (Rx1day)	98.0 mm (3.9 in)	1916	37.5 mm (1.5 in)	94
Wettest five days (Rx5day)	141.7 mm (5.6 in)	1947	61.8 mm (2.4 in)	94
Longest dry spell (CDD)	96 days	1948	34 days	94

Hottest day (TXx)

The hottest day of the year at Fort Macleod, 1876 to 1983. The record is 42.8 C (109.0 F) in 1877, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Fort Macleod by year
Year	Hottest day (TXx)
1876	38.3 C (100.9 F)
1877	42.8 C (109.0 F)
1878	n/a
1879	37.2 C (99.0 F)
1885	27.8 C (82.0 F)
1886	20.0 C (68.0 F)
1895	32.2 C (90.0 F)
1896	38.9 C (102.0 F)
1897	35.6 C (96.1 F)
1898	36.7 C (98.1 F)
1899	35.6 C (96.1 F)
1900	36.7 C (98.1 F)
1901	34.4 C (93.9 F)
1902	31.7 C (89.1 F)
1903	30.6 C (87.1 F)
1904	35.6 C (96.1 F)
1905	35.6 C (96.1 F)
1906	36.1 C (97.0 F)
1907	30.6 C (87.1 F)
1908	33.9 C (93.0 F)
1909	32.8 C (91.0 F)
1910	38.9 C (102.0 F)
1911	32.2 C (90.0 F)
1912	37.2 C (99.0 F)
1913	33.3 C (91.9 F)
1914	37.2 C (99.0 F)
1915	33.9 C (93.0 F)
1916	33.3 C (91.9 F)
1917	35.0 C (95.0 F)
1918	37.2 C (99.0 F)
1919	38.9 C (102.0 F)
1920	35.0 C (95.0 F)
1921	37.2 C (99.0 F)
1922	33.9 C (93.0 F)
1923	34.4 C (93.9 F)
1924	35.0 C (95.0 F)
1925	37.2 C (99.0 F)
1926	34.4 C (93.9 F)
1927	31.7 C (89.1 F)
1928	34.4 C (93.9 F)
1929	36.7 C (98.1 F)
1930	37.8 C (100.0 F)
1931	37.2 C (99.0 F)
1932	36.1 C (97.0 F)
1933	37.8 C (100.0 F)
1934	36.7 C (98.1 F)
1935	36.7 C (98.1 F)
1936	38.3 C (100.9 F)
1937	36.7 C (98.1 F)
1938	34.4 C (93.9 F)
1939	37.8 C (100.0 F)
1940	35.6 C (96.1 F)
1941	37.8 C (100.0 F)
1942	33.3 C (91.9 F)
1943	33.3 C (91.9 F)
1944	36.7 C (98.1 F)
1945	33.3 C (91.9 F)
1946	35.6 C (96.1 F)
1947	35.6 C (96.1 F)
1948	33.3 C (91.9 F)
1949	35.6 C (96.1 F)
1950	36.7 C (98.1 F)
1951	34.4 C (93.9 F)
1952	33.3 C (91.9 F)
1953	36.7 C (98.1 F)
1954	34.4 C (93.9 F)
1955	33.3 C (91.9 F)
1956	33.9 C (93.0 F)
1957	33.9 C (93.0 F)
1958	33.3 C (91.9 F)
1959	35.6 C (96.1 F)
1960	37.8 C (100.0 F)
1961	36.1 C (97.0 F)
1962	35.0 C (95.0 F)
1963	32.2 C (90.0 F)
1964	34.4 C (93.9 F)
1965	32.2 C (90.0 F)
1966	32.2 C (90.0 F)
1967	35.0 C (95.0 F)
1968	34.4 C (93.9 F)
1969	33.9 C (93.0 F)
1970	33.9 C (93.0 F)
1971	36.7 C (98.1 F)
1972	32.8 C (91.0 F)
1973	36.7 C (98.1 F)
1974	32.8 C (91.0 F)
1975	35.0 C (95.0 F)
1976	33.3 C (91.9 F)
1977	33.3 C (91.9 F)
1978	32.2 C (90.0 F)
1979	35.0 C (95.0 F)
1980	33.0 C (91.4 F)
1981	35.5 C (95.9 F)
1982	33.0 C (91.4 F)
1983	36.0 C (96.8 F)

Coldest night (TNn)

The coldest night of the year at Fort Macleod, 1876 to 1983. The record is -45.0 C (-49.0 F) in 1905, marked on the chart; the median year is -35.6 C (-32.1 F).

Coldest night (TNn) at Fort Macleod by year
Year	Coldest night (TNn)
1876	-30.6 C (-23.1 F)
1877	-23.9 C (-11.0 F)
1878	-21.7 C (-7.1 F)
1879	-35.6 C (-32.1 F)
1885	-15.0 C (5.0 F)
1886	-23.9 C (-11.0 F)
1895	-30.6 C (-23.1 F)
1896	-37.8 C (-36.0 F)
1897	-40.6 C (-41.1 F)
1898	-34.4 C (-29.9 F)
1899	-37.8 C (-36.0 F)
1900	-35.6 C (-32.1 F)
1901	-34.4 C (-29.9 F)
1902	-34.4 C (-29.9 F)
1903	-38.9 C (-38.0 F)
1904	-33.3 C (-27.9 F)
1905	-45.0 C (-49.0 F)
1906	-36.1 C (-33.0 F)
1907	-43.9 C (-47.0 F)
1908	-28.3 C (-18.9 F)
1909	-42.8 C (-45.0 F)
1910	-38.3 C (-36.9 F)
1911	-42.8 C (-45.0 F)
1912	-36.7 C (-34.1 F)
1913	-34.4 C (-29.9 F)
1914	-37.2 C (-35.0 F)
1915	-31.7 C (-25.1 F)
1916	-42.2 C (-44.0 F)
1917	-43.9 C (-47.0 F)
1918	-40.6 C (-41.1 F)
1919	-37.2 C (-35.0 F)
1920	-35.0 C (-31.0 F)
1921	-34.4 C (-29.9 F)
1922	-43.3 C (-45.9 F)
1923	-40.0 C (-40.0 F)
1924	-45.0 C (-49.0 F)
1925	-33.9 C (-29.0 F)
1926	-30.0 C (-22.0 F)
1927	-39.4 C (-38.9 F)
1928	-36.7 C (-34.1 F)
1929	-45.0 C (-49.0 F)
1930	-38.9 C (-38.0 F)
1931	-26.7 C (-16.1 F)
1932	-33.3 C (-27.9 F)
1933	-32.8 C (-27.0 F)
1934	-32.2 C (-26.0 F)
1935	-37.8 C (-36.0 F)
1936	-40.6 C (-41.1 F)
1937	-37.2 C (-35.0 F)
1938	-36.1 C (-33.0 F)
1939	-41.1 C (-42.0 F)
1940	-30.0 C (-22.0 F)
1941	-28.9 C (-20.0 F)
1942	-35.6 C (-32.1 F)
1943	-40.0 C (-40.0 F)
1944	-27.8 C (-18.0 F)
1945	-31.1 C (-24.0 F)
1946	-28.9 C (-20.0 F)
1947	-35.6 C (-32.1 F)
1948	-28.9 C (-20.0 F)
1949	-37.8 C (-36.0 F)
1950	-40.0 C (-40.0 F)
1951	-36.7 C (-34.1 F)
1952	-33.3 C (-27.9 F)
1953	-26.7 C (-16.1 F)
1954	-42.2 C (-44.0 F)
1955	-34.4 C (-29.9 F)
1956	-35.6 C (-32.1 F)
1957	-41.1 C (-42.0 F)
1958	-30.0 C (-22.0 F)
1959	-33.3 C (-27.9 F)
1960	-33.3 C (-27.9 F)
1961	-31.7 C (-25.1 F)
1962	-33.3 C (-27.9 F)
1963	-34.4 C (-29.9 F)
1964	-36.7 C (-34.1 F)
1965	-33.3 C (-27.9 F)
1966	-34.4 C (-29.9 F)
1967	-31.1 C (-24.0 F)
1968	-42.2 C (-44.0 F)
1969	-40.6 C (-41.1 F)
1970	-37.8 C (-36.0 F)
1971	-40.0 C (-40.0 F)
1972	-41.1 C (-42.0 F)
1973	-31.7 C (-25.1 F)
1974	-34.4 C (-29.9 F)
1975	-33.9 C (-29.0 F)
1976	-33.3 C (-27.9 F)
1977	-38.3 C (-36.9 F)
1978	-31.7 C (-25.1 F)
1979	-36.7 C (-34.1 F)
1980	-35.0 C (-31.0 F)
1981	-30.0 C (-22.0 F)
1982	-35.0 C (-31.0 F)
1983	-42.5 C (-44.5 F)

Wettest day (Rx1day)

The wettest day of the year at Fort Macleod, 1876 to 1983. The record is 98.0 mm (3.9 in) in 1916, marked on the chart; the median year is 37.5 mm (1.5 in).

Wettest day (Rx1day) at Fort Macleod by year
Year	Wettest day (Rx1day)
1876	n/a
1877	10.2 mm (0.4 in)
1878	43.4 mm (1.7 in)
1879	45.7 mm (1.8 in)
1885	14.0 mm (0.6 in)
1886	10.2 mm (0.4 in)
1895	5.1 mm (0.20 in)
1896	30.5 mm (1.2 in)
1897	34.5 mm (1.4 in)
1898	50.8 mm (2.0 in)
1899	44.7 mm (1.8 in)
1900	21.6 mm (0.9 in)
1901	40.6 mm (1.6 in)
1902	21.6 mm (0.9 in)
1903	23.1 mm (0.9 in)
1904	12.7 mm (0.5 in)
1905	30.5 mm (1.2 in)
1906	43.2 mm (1.7 in)
1907	22.4 mm (0.9 in)
1908	44.7 mm (1.8 in)
1909	38.1 mm (1.5 in)
1910	19.3 mm (0.8 in)
1911	41.1 mm (1.6 in)
1912	27.9 mm (1.1 in)
1913	34.8 mm (1.4 in)
1914	45.7 mm (1.8 in)
1915	41.9 mm (1.6 in)
1916	98.0 mm (3.9 in)
1917	30.5 mm (1.2 in)
1918	20.3 mm (0.8 in)
1919	27.4 mm (1.1 in)
1920	47.0 mm (1.9 in)
1921	45.7 mm (1.8 in)
1922	76.2 mm (3.0 in)
1923	55.9 mm (2.2 in)
1924	30.5 mm (1.2 in)
1925	61.2 mm (2.4 in)
1926	48.0 mm (1.9 in)
1927	29.5 mm (1.2 in)
1928	58.4 mm (2.3 in)
1929	37.8 mm (1.5 in)
1930	32.5 mm (1.3 in)
1931	32.8 mm (1.3 in)
1932	58.9 mm (2.3 in)
1933	27.4 mm (1.1 in)
1934	31.0 mm (1.2 in)
1935	35.6 mm (1.4 in)
1936	27.9 mm (1.1 in)
1937	66.5 mm (2.6 in)
1938	30.5 mm (1.2 in)
1939	76.7 mm (3.0 in)
1940	37.1 mm (1.5 in)
1941	20.3 mm (0.8 in)
1942	55.4 mm (2.2 in)
1943	9.7 mm (0.38 in)
1944	13.7 mm (0.5 in)
1945	27.4 mm (1.1 in)
1946	97.0 mm (3.8 in)
1947	66.5 mm (2.6 in)
1948	51.8 mm (2.0 in)
1949	52.8 mm (2.1 in)
1950	47.8 mm (1.9 in)
1951	77.7 mm (3.1 in)
1952	44.7 mm (1.8 in)
1953	61.7 mm (2.4 in)
1954	30.5 mm (1.2 in)
1955	46.0 mm (1.8 in)
1956	31.8 mm (1.3 in)
1957	26.9 mm (1.1 in)
1958	18.3 mm (0.7 in)
1959	56.4 mm (2.2 in)
1960	20.3 mm (0.8 in)
1961	43.4 mm (1.7 in)
1962	21.8 mm (0.9 in)
1963	76.7 mm (3.0 in)
1964	25.4 mm (1.0 in)
1965	31.8 mm (1.3 in)
1966	46.5 mm (1.8 in)
1967	45.7 mm (1.8 in)
1968	49.3 mm (1.9 in)
1969	42.7 mm (1.7 in)
1970	34.3 mm (1.4 in)
1971	22.9 mm (0.9 in)
1972	50.8 mm (2.0 in)
1973	26.4 mm (1.0 in)
1974	48.3 mm (1.9 in)
1975	69.3 mm (2.7 in)
1976	52.1 mm (2.1 in)
1977	30.5 mm (1.2 in)
1978	36.8 mm (1.4 in)
1979	35.6 mm (1.4 in)
1980	38.6 mm (1.5 in)
1981	73.3 mm (2.9 in)
1982	25.0 mm (1.0 in)
1983	39.0 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Fort Macleod, 1876 to 1983. The record is 141.7 mm (5.6 in) in 1947, marked on the chart; the median year is 61.8 mm (2.4 in).

Wettest five days (Rx5day) at Fort Macleod by year
Year	Wettest five days (Rx5day)
1876	n/a
1877	12.7 mm (0.5 in)
1878	94.9 mm (3.7 in)
1879	116.3 mm (4.6 in)
1885	19.8 mm (0.8 in)
1886	15.3 mm (0.6 in)
1895	5.1 mm (0.20 in)
1896	45.1 mm (1.8 in)
1897	64.4 mm (2.5 in)
1898	67.1 mm (2.6 in)
1899	85.8 mm (3.4 in)
1900	48.5 mm (1.9 in)
1901	62.4 mm (2.5 in)
1902	63.8 mm (2.5 in)
1903	29.2 mm (1.1 in)
1904	22.8 mm (0.9 in)
1905	40.6 mm (1.6 in)
1906	63.3 mm (2.5 in)
1907	35.6 mm (1.4 in)
1908	95.2 mm (3.7 in)
1909	58.9 mm (2.3 in)
1910	30.7 mm (1.2 in)
1911	70.1 mm (2.8 in)
1912	40.7 mm (1.6 in)
1913	45.0 mm (1.8 in)
1914	62.5 mm (2.5 in)
1915	56.7 mm (2.2 in)
1916	104.4 mm (4.1 in)
1917	44.7 mm (1.8 in)
1918	32.5 mm (1.3 in)
1919	50.3 mm (2.0 in)
1920	59.4 mm (2.3 in)
1921	52.1 mm (2.1 in)
1922	113.1 mm (4.5 in)
1923	82.3 mm (3.2 in)
1924	43.5 mm (1.7 in)
1925	64.5 mm (2.5 in)
1926	81.5 mm (3.2 in)
1927	97.6 mm (3.8 in)
1928	85.0 mm (3.3 in)
1929	87.6 mm (3.4 in)
1930	46.7 mm (1.8 in)
1931	44.0 mm (1.7 in)
1932	84.9 mm (3.3 in)
1933	43.6 mm (1.7 in)
1934	94.5 mm (3.7 in)
1935	45.7 mm (1.8 in)
1936	60.1 mm (2.4 in)
1937	90.9 mm (3.6 in)
1938	45.8 mm (1.8 in)
1939	92.9 mm (3.7 in)
1940	61.5 mm (2.4 in)
1941	31.5 mm (1.2 in)
1942	97.1 mm (3.8 in)
1943	16.8 mm (0.7 in)
1944	27.0 mm (1.1 in)
1945	67.6 mm (2.7 in)
1946	116.8 mm (4.6 in)
1947	141.7 mm (5.6 in)
1948	112.3 mm (4.4 in)
1949	64.0 mm (2.5 in)
1950	57.5 mm (2.3 in)
1951	109.2 mm (4.3 in)
1952	59.1 mm (2.3 in)
1953	127.2 mm (5.0 in)
1954	64.2 mm (2.5 in)
1955	77.5 mm (3.1 in)
1956	70.4 mm (2.8 in)
1957	42.9 mm (1.7 in)
1958	33.5 mm (1.3 in)
1959	84.3 mm (3.3 in)
1960	35.5 mm (1.4 in)
1961	53.1 mm (2.1 in)
1962	27.7 mm (1.1 in)
1963	107.4 mm (4.2 in)
1964	67.5 mm (2.7 in)
1965	64.8 mm (2.6 in)
1966	49.8 mm (2.0 in)
1967	80.0 mm (3.1 in)
1968	91.0 mm (3.6 in)
1969	90.2 mm (3.6 in)
1970	83.1 mm (3.3 in)
1971	53.1 mm (2.1 in)
1972	58.2 mm (2.3 in)
1973	46.2 mm (1.8 in)
1974	48.3 mm (1.9 in)
1975	78.4 mm (3.1 in)
1976	97.8 mm (3.9 in)
1977	31.8 mm (1.3 in)
1978	62.0 mm (2.4 in)
1979	46.1 mm (1.8 in)
1980	87.0 mm (3.4 in)
1981	107.7 mm (4.2 in)
1982	48.4 mm (1.9 in)
1983	45.6 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Fort Macleod, 1876 to 1983. The record is 96 days in 1948, marked on the chart; the median year is 34 days.

Longest dry spell (CDD) at Fort Macleod by year
Year	Longest dry spell (CDD)
1876	n/a
1877	19 days
1878	28 days
1879	33 days
1885	13 days
1886	10 days
1895	61 days
1896	35 days
1897	39 days
1898	26 days
1899	41 days
1900	40 days
1901	58 days
1902	34 days
1903	8 days
1904	77 days
1905	35 days
1906	32 days
1907	45 days
1908	30 days
1909	41 days
1910	39 days
1911	36 days
1912	41 days
1913	49 days
1914	32 days
1915	40 days
1916	25 days
1917	34 days
1918	36 days
1919	43 days
1920	38 days
1921	31 days
1922	44 days
1923	28 days
1924	25 days
1925	28 days
1926	45 days
1927	35 days
1928	45 days
1929	29 days
1930	40 days
1931	36 days
1932	19 days
1933	32 days
1934	42 days
1935	48 days
1936	41 days
1937	23 days
1938	33 days
1939	53 days
1940	26 days
1941	22 days
1942	20 days
1943	34 days
1944	42 days
1945	28 days
1946	38 days
1947	16 days
1948	96 days
1949	39 days
1950	27 days
1951	29 days
1952	54 days
1953	30 days
1954	38 days
1955	46 days
1956	41 days
1957	22 days
1958	26 days
1959	26 days
1960	45 days
1961	22 days
1962	28 days
1963	30 days
1964	41 days
1965	44 days
1966	29 days
1967	36 days
1968	59 days
1969	65 days
1970	30 days
1971	25 days
1972	33 days
1973	32 days
1974	32 days
1975	30 days
1976	32 days
1977	35 days
1978	41 days
1979	27 days
1980	25 days
1981	35 days
1982	21 days
1983	32 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

82 years with a frost

Across 82 years with a frost, the median last spring frost at Fort Macleod falls on 18 May and the median first autumn frost on 16 September, which leaves a median of 121 days between them.

In 1954 to 1983 the median growing season was 121 days. That is 4 days more than in 1896 to 1927.

Fitted over all years, the growing season changes by +1.8 days per decade at this station.

Frost dates and growing season at Fort Macleod
Measure	Median, all years	Earliest period (1896 to 1927)	Recent period (1954 to 1983)	Recent against earliest	Fitted trend
Last spring frost	18 May	20 May	17 May	3 days earlier	-0.7 days per decade
First autumn frost	16 September	14 September	16 September	2 days later	+1.0 days per decade
Growing days	121 days	117 days	121 days	4 days more	+1.8 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

84 years, 1896 to 1983

A day with at least 38.0 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 100.4 mm (4.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Fort Macleod: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	38.0 mm (1.5 in)
5 years	54.2 mm (2.1 in)
10 years	65.1 mm (2.6 in)
25 years	79.1 mm (3.1 in)
50 years	89.7 mm (3.5 in)
100 years	100.4 mm (4.0 in)	Longer than the 84 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, 84 years of values from 1896 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: 98.0 mm (3.9 in) in 1916; 97.0 mm (3.8 in) in 1946; 77.7 mm (3.1 in) in 1951.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Fort Macleod standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Fort Macleod 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).