High River Weather Records (CA003033240)

Record envelope, standing records and threshold days for High River (CA003033240), Alberta, Canada, with 105 years of record.

Key Facts for High River

High River (CA003033240) is a weather station in Alberta, Canada at 50.48 latitude and -114.17 longitude, 1,219 m (3,999 ft) above sea level.
The station reports from 1902 to 2006, 105 years of record.
1,464 records set at High River still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
High River set a daily record precipitation of 9.6 mm (0.38 in) on 25 December 1983.

About the Station

Location: Alberta, Canada, 50.48 latitude, -114.17 longitude.
Elevation: 1,219 m (3,999 ft).
Period of record: 1902 to 2006, 105 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 High River. 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 High River, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	20.6 C (69.1 F)	-45.0 C (-49.0 F)	n/a	n/a
Feb	22.2 C (72.0 F)	-43.3 C (-45.9 F)	n/a	n/a
Mar	22.2 C (72.0 F)	-40.6 C (-41.1 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-30.0 C (-22.0 F)	n/a	n/a
May	33.3 C (91.9 F)	-19.4 C (-2.9 F)	n/a	n/a
Jun	35.0 C (95.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jul	37.2 C (99.0 F)	-3.9 C (25.0 F)	n/a	n/a
Aug	35.6 C (96.1 F)	-6.7 C (19.9 F)	n/a	n/a
Sep	33.9 C (93.0 F)	-16.1 C (3.0 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-29.4 C (-20.9 F)	n/a	n/a
Nov	24.4 C (75.9 F)	-36.7 C (-34.1 F)	n/a	n/a
Dec	18.9 C (66.0 F)	-45.0 C (-49.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at High River still stand. 1936 holds the most, with 57.

Standing records at High River by the year they were set
Year set	Standing records
1902	1
1903	18
1904	6
1906	1
1907	14
1908	14
1909	12
1910	29
1911	26
1912	9
1913	10
1914	6
1915	9
1918	6
1919	37
1920	22
1921	19
1922	16
1923	11
1924	21
1925	22
1926	24
1927	12
1928	26
1929	29
1930	32
1931	28
1932	11
1933	28
1934	49
1935	19
1936	57
1937	18
1938	20
1939	38
1940	16
1941	6
1942	14
1943	29
1944	23
1945	17
1946	9
1947	18
1948	9
1949	25
1950	27
1951	31
1952	7
1953	13
1954	44
1955	27
1956	23
1957	19
1958	14
1959	20
1960	15
1961	21
1962	27
1963	13
1964	17
1965	22
1966	15
1967	19
1968	17
1969	19
1970	13
1971	12
1972	14
1973	15
1974	10
1975	5
1976	9
1977	20
1978	8
1979	17
1980	20
1981	19
1982	11
1983	15

Wettest Day of Each Month

Jun: 160.5 mm (6.3 in)

The wettest day on record for each calendar month at High River. The most was 160.5 mm (6.3 in) on 19 June 1926.

Record daily precipitation for each month at High River
Month	Record daily precipitation (mm)	Date
Jan	35.6 mm (1.4 in)	15 January 1921
Feb	30.5 mm (1.2 in)	11 February 1928
Mar	48.3 mm (1.9 in)	12 March 1931
Apr	96.3 mm (3.8 in)	25 April 1932
May	76.5 mm (3.0 in)	23 May 1927
Jun	160.5 mm (6.3 in)	19 June 1926
Jul	59.2 mm (2.3 in)	29 July 1942
Aug	73.4 mm (2.9 in)	17 August 1902
Sep	59.2 mm (2.3 in)	13 September 1940
Oct	38.1 mm (1.5 in)	17 October 1929
Nov	35.6 mm (1.4 in)	5 November 1924
Dec	39.6 mm (1.6 in)	14 December 1979

Period of Record Coverage

1902 to 1983

79 years of record at High River, 1902 to 1983. 12 years have data for under 90 percent of days and are left out of rankings: 1902, 1904, 1906, 1912, 1913, 1914, 1915, 1918 and others.

Days with data per year at High River
Year	Days with data	Share of year	Complete
1902	133	36%	No
1903	331	91%	Yes
1904	210	57%	No
1906	31	8%	No
1907	365	100%	Yes
1908	361	99%	Yes
1909	362	99%	Yes
1910	351	96%	Yes
1911	364	100%	Yes
1912	181	49%	No
1913	303	83%	No
1914	87	24%	No
1915	79	22%	No
1918	183	50%	No
1919	335	92%	Yes
1920	365	100%	Yes
1921	365	100%	Yes
1922	364	100%	Yes
1923	364	100%	Yes
1924	366	100%	Yes
1925	363	99%	Yes
1926	365	100%	Yes
1927	364	100%	Yes
1928	366	100%	Yes
1929	364	100%	Yes
1930	364	100%	Yes
1931	364	100%	Yes
1932	365	100%	Yes
1933	365	100%	Yes
1934	363	99%	Yes
1935	203	56%	No
1936	365	100%	Yes
1937	364	100%	Yes
1938	364	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	130	36%	No
1942	365	100%	Yes
1943	303	83%	No
1944	366	100%	Yes
1945	365	100%	Yes
1946	363	99%	Yes
1947	365	100%	Yes
1948	357	98%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	365	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	363	99%	Yes
1956	363	99%	Yes
1957	364	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	365	100%	Yes
1961	362	99%	Yes
1962	365	100%	Yes
1963	362	99%	Yes
1964	366	100%	Yes
1965	364	100%	Yes
1966	363	99%	Yes
1967	365	100%	Yes
1968	262	72%	No
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	364	100%	Yes
1974	365	100%	Yes
1975	364	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	363	99%	Yes
1980	366	100%	Yes
1981	359	98%	Yes
1982	358	98%	Yes
1983	364	100%	Yes

Latest Records

Latest records at High River
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 December 1983	High River, CA	daily rain	9.6 mm (0.38 in)	1.2 mm (0.05 in)	66 years	20 of 100 (Routine)
25 December 1983	High River, CA	daily snowfall	9.6 cm (3.8 in)	1.2 cm (0.5 in)	66 years	30 of 100 (Routine)
23 December 1983	High River, CA	daily low max	-25.0 C (-13.0 F)	1.7 C (3.1 F)	49 years	23 of 100 (Routine)
22 December 1983	High River, CA	daily low min	-34.0 C (-29.2 F)	2.3 C (4.1 F)	62 years	28 of 100 (Routine)
26 October 1983	High River, CA	daily high min	10.0 C (50.0 F)	1.1 C (2.0 F)	58 years	26 of 100 (Routine)
14 October 1983	High River, CA	daily snowfall	2.4 cm (0.9 in)	0.9 cm (0.4 in)	36 years	20 of 100 (Routine)
27 September 1983	High River, CA	daily snowfall	11.2 cm (4.4 in)	7.8 cm (3.1 in)	0 years	22 of 100 (Routine)
26 September 1983	High River, CA	daily high min	11.0 C (51.8 F)	3.2 C (5.8 F)	68 years	35 of 100 (Notable)
10 September 1983	High River, CA	daily low min	-5.5 C (22.1 F)	1.1 C (2.0 F)	68 years	30 of 100 (Routine)
3 September 1983	High River, CA	daily high min	13.0 C (55.4 F)	1.9 C (3.4 F)	72 years	33 of 100 (Routine)
2 September 1983	High River, CA	daily high min (Tie)	10.0 C (50.0 F)	tie	28 years	4 of 100 (Routine)
6 August 1983	High River, CA	daily high max	34.0 C (93.2 F)	0.7 C (1.3 F)	12 years	12 of 100 (Routine)
1 August 1983	High River, CA	daily high min	14.0 C (57.2 F)	0.7 C (1.3 F)	12 years	13 of 100 (Routine)
17 July 1983	High River, CA	daily low min	1.5 C (34.7 F)	0.2 C (0.4 F)	58 years	25 of 100 (Routine)
12 July 1983	High River, CA	daily high min	13.5 C (56.3 F)	0.7 C (1.3 F)	72 years	31 of 100 (Routine)
8 July 1983	High River, CA	daily high min	13.0 C (55.4 F)	0.2 C (0.4 F)	52 years	23 of 100 (Routine)
11 May 1983	High River, CA	daily low min	-7.0 C (19.4 F)	0.3 C (0.5 F)	40 years	20 of 100 (Routine)
24 April 1983	High River, CA	daily rain	24.8 mm (1.0 in)	14.6 mm (0.6 in)	28 years	20 of 100 (Routine)
10 April 1983	High River, CA	daily low min	-14.5 C (5.9 F)	0.1 C (0.2 F)	34 years	18 of 100 (Routine)
8 April 1983	High River, CA	daily rain (Tie)	10.2 mm (0.4 in)	tie	8 years	2 of 100 (Routine)

Climate Trend

66 complete years, 1903 to 1983

One stripe for each of 66 complete years at High River, 1903 to 1983. Blue stripes are years cooler than the station's own mean of 3.3 C (37.9 F); red stripes are warmer. The coolest year was 1951, at 1.0 C (33.7 F), and the warmest was 1931, at 5.5 C (41.8 F). The strongest colour marks a difference of 2.3 C (4.1 F).

Annual mean temperature at High River as warming stripes, 1903 to 1983
Year	Annual mean temperature	Difference from the station mean
1903	3.5 C	+0.24 C
1907	1.6 C	-1.63 C
1908	3.8 C	+0.57 C
1909	1.8 C	-1.50 C
1910	4.4 C	+1.14 C
1911	1.6 C	-1.64 C
1920	2.5 C	-0.74 C
1921	3.1 C	-0.16 C
1922	2.3 C	-0.92 C
1923	3.5 C	+0.25 C
1924	2.7 C	-0.58 C
1925	3.5 C	+0.29 C
1926	4.1 C	+0.83 C
1927	2.1 C	-1.13 C
1928	4.7 C	+1.43 C
1929	2.7 C	-0.52 C
1930	4.1 C	+0.86 C
1931	5.5 C	+2.20 C
1932	3.2 C	-0.01 C
1933	2.8 C	-0.42 C
1934	5.3 C	+2.09 C
1936	2.7 C	-0.55 C
1937	2.7 C	-0.60 C
1938	4.6 C	+1.36 C
1939	5.1 C	+1.85 C
1940	4.4 C	+1.16 C
1942	4.3 C	+1.03 C
1944	4.5 C	+1.29 C
1945	3.1 C	-0.15 C
1946	4.1 C	+0.86 C
1947	3.6 C	+0.37 C
1948	2.5 C	-0.73 C
1949	2.5 C	-0.76 C
1950	1.4 C	-1.90 C
1951	1.0 C	-2.28 C
1952	3.9 C	+0.63 C
1953	4.2 C	+0.90 C
1954	2.7 C	-0.55 C
1955	1.0 C	-2.25 C
1956	3.0 C	-0.24 C
1957	2.9 C	-0.35 C
1958	4.2 C	+0.96 C
1959	2.7 C	-0.59 C
1960	3.9 C	+0.68 C
1961	4.1 C	+0.80 C
1962	3.8 C	+0.54 C
1963	4.2 C	+0.96 C
1964	2.9 C	-0.36 C
1965	2.3 C	-0.96 C
1966	2.7 C	-0.53 C
1967	3.0 C	-0.26 C
1969	2.3 C	-0.91 C
1970	2.8 C	-0.50 C
1971	2.7 C	-0.51 C
1972	1.6 C	-1.62 C
1973	3.6 C	+0.36 C
1974	4.3 C	+1.03 C
1975	2.4 C	-0.88 C
1976	4.7 C	+1.46 C
1977	3.6 C	+0.37 C
1978	2.2 C	-1.10 C
1979	3.3 C	+0.02 C
1980	3.5 C	+0.24 C
1981	5.2 C	+1.92 C
1982	1.9 C	-1.33 C
1983	3.8 C	+0.55 C

The fitted trend in annual mean temperature here over 1903 to 1983 is 0.00 C (-0.12 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.00 F (-0.21 to 0.22) per decade. The slope is a straight line fitted to 66 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at High River
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.00 C (-0.12 to 0.12) per decade	0.00 F (-0.21 to 0.22) per decade	1903 to 1983	66	Not clearly different from zero
Mean daily maximum	-0.13 C (-0.27 to 0.01) per decade	-0.23 F (-0.49 to 0.02) per decade	1903 to 1983	66	Not clearly different from zero
Mean daily minimum	0.13 C (0.02 to 0.24) per decade	0.24 F (0.03 to 0.44) per decade	1903 to 1983	66	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

1902 to 1983

Yearly extremes at High River: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	1933	32.2 C (90.0 F)	79
Coldest night (TNn)	-45.0 C (-49.0 F)	1929	-37.2 C (-35.0 F)	79
Wettest day (Rx1day)	160.5 mm (6.3 in)	1926	35.6 mm (1.4 in)	81
Wettest five days (Rx5day)	185.1 mm (7.3 in)	1926	60.3 mm (2.4 in)	81
Longest dry spell (CDD)	58 days	1948	31 days	81

Hottest day (TXx)

The hottest day of the year at High River, 1902 to 1983. The record is 37.2 C (99.0 F) in 1933, marked on the chart; the median year is 32.2 C (90.0 F).

Hottest day (TXx) at High River by year
Year	Hottest day (TXx)
1902	27.2 C (81.0 F)
1903	28.9 C (84.0 F)
1904	36.7 C (98.1 F)
1906	11.1 C (52.0 F)
1907	28.9 C (84.0 F)
1908	31.7 C (89.1 F)
1909	31.1 C (88.0 F)
1910	35.6 C (96.1 F)
1911	31.7 C (89.1 F)
1912	32.8 C (91.0 F)
1913	30.0 C (86.0 F)
1914	18.3 C (64.9 F)
1915	27.2 C (81.0 F)
1916	n/a
1917	n/a
1918	32.2 C (90.0 F)
1919	36.1 C (97.0 F)
1920	31.7 C (89.1 F)
1921	33.3 C (91.9 F)
1922	32.2 C (90.0 F)
1923	30.0 C (86.0 F)
1924	31.1 C (88.0 F)
1925	32.8 C (91.0 F)
1926	31.7 C (89.1 F)
1927	30.0 C (86.0 F)
1928	32.2 C (90.0 F)
1929	35.6 C (96.1 F)
1930	33.3 C (91.9 F)
1931	34.4 C (93.9 F)
1932	32.8 C (91.0 F)
1933	37.2 C (99.0 F)
1934	36.7 C (98.1 F)
1935	35.0 C (95.0 F)
1936	37.2 C (99.0 F)
1937	33.9 C (93.0 F)
1938	35.0 C (95.0 F)
1939	36.7 C (98.1 F)
1940	33.9 C (93.0 F)
1941	21.1 C (70.0 F)
1942	32.2 C (90.0 F)
1943	31.7 C (89.1 F)
1944	32.2 C (90.0 F)
1945	31.7 C (89.1 F)
1946	32.8 C (91.0 F)
1947	32.8 C (91.0 F)
1948	31.1 C (88.0 F)
1949	32.8 C (91.0 F)
1950	33.9 C (93.0 F)
1951	32.2 C (90.0 F)
1952	31.1 C (88.0 F)
1953	29.4 C (84.9 F)
1954	30.0 C (86.0 F)
1955	31.7 C (89.1 F)
1956	31.1 C (88.0 F)
1957	30.6 C (87.1 F)
1958	31.7 C (89.1 F)
1959	33.3 C (91.9 F)
1960	34.4 C (93.9 F)
1961	35.6 C (96.1 F)
1962	33.9 C (93.0 F)
1963	29.4 C (84.9 F)
1964	33.9 C (93.0 F)
1965	30.0 C (86.0 F)
1966	29.4 C (84.9 F)
1967	32.8 C (91.0 F)
1968	31.1 C (88.0 F)
1969	31.1 C (88.0 F)
1970	35.0 C (95.0 F)
1971	34.4 C (93.9 F)
1972	31.1 C (88.0 F)
1973	32.2 C (90.0 F)
1974	31.7 C (89.1 F)
1975	33.3 C (91.9 F)
1976	31.1 C (88.0 F)
1977	31.1 C (88.0 F)
1978	30.6 C (87.1 F)
1979	34.0 C (93.2 F)
1980	28.5 C (83.3 F)
1981	33.0 C (91.4 F)
1982	30.0 C (86.0 F)
1983	34.0 C (93.2 F)

Coldest night (TNn)

The coldest night of the year at High River, 1902 to 1983. The record is -45.0 C (-49.0 F) in 1929, marked on the chart; the median year is -37.2 C (-35.0 F).

Coldest night (TNn) at High River by year
Year	Coldest night (TNn)
1902	-33.3 C (-27.9 F)
1903	-35.0 C (-31.0 F)
1904	-31.7 C (-25.1 F)
1906	-33.9 C (-29.0 F)
1907	-41.7 C (-43.1 F)
1908	-31.1 C (-24.0 F)
1909	-42.2 C (-44.0 F)
1910	-38.9 C (-38.0 F)
1911	-41.7 C (-43.1 F)
1912	-37.2 C (-35.0 F)
1913	-36.1 C (-33.0 F)
1914	-37.8 C (-36.0 F)
1915	-15.0 C (5.0 F)
1916	n/a
1917	n/a
1918	-24.4 C (-11.9 F)
1919	-38.9 C (-38.0 F)
1920	-42.8 C (-45.0 F)
1921	-40.0 C (-40.0 F)
1922	-37.8 C (-36.0 F)
1923	-43.3 C (-45.9 F)
1924	-43.9 C (-47.0 F)
1925	-35.6 C (-32.1 F)
1926	-35.6 C (-32.1 F)
1927	-37.8 C (-36.0 F)
1928	-37.2 C (-35.0 F)
1929	-45.0 C (-49.0 F)
1930	-42.2 C (-44.0 F)
1931	-28.9 C (-20.0 F)
1932	-37.8 C (-36.0 F)
1933	-38.9 C (-38.0 F)
1934	-38.9 C (-38.0 F)
1935	-41.1 C (-42.0 F)
1936	-42.8 C (-45.0 F)
1937	-38.3 C (-36.9 F)
1938	-34.4 C (-29.9 F)
1939	-41.7 C (-43.1 F)
1940	-33.9 C (-29.0 F)
1941	-33.9 C (-29.0 F)
1942	-31.1 C (-24.0 F)
1943	-34.4 C (-29.9 F)
1944	-27.8 C (-18.0 F)
1945	-35.6 C (-32.1 F)
1946	-33.3 C (-27.9 F)
1947	-40.6 C (-41.1 F)
1948	-36.1 C (-33.0 F)
1949	-42.8 C (-45.0 F)
1950	-44.4 C (-47.9 F)
1951	-40.6 C (-41.1 F)
1952	-37.8 C (-36.0 F)
1953	-31.7 C (-25.1 F)
1954	-41.1 C (-42.0 F)
1955	-37.2 C (-35.0 F)
1956	-37.2 C (-35.0 F)
1957	-38.3 C (-36.9 F)
1958	-31.7 C (-25.1 F)
1959	-35.6 C (-32.1 F)
1960	-35.0 C (-31.0 F)
1961	-32.2 C (-26.0 F)
1962	-35.0 C (-31.0 F)
1963	-36.1 C (-33.0 F)
1964	-40.0 C (-40.0 F)
1965	-37.8 C (-36.0 F)
1966	-35.6 C (-32.1 F)
1967	-32.2 C (-26.0 F)
1968	-45.0 C (-49.0 F)
1969	-41.7 C (-43.1 F)
1970	-38.9 C (-38.0 F)
1971	-39.4 C (-38.9 F)
1972	-39.4 C (-38.9 F)
1973	-34.4 C (-29.9 F)
1974	-33.3 C (-27.9 F)
1975	-35.0 C (-31.0 F)
1976	-35.6 C (-32.1 F)
1977	-40.6 C (-41.1 F)
1978	-33.9 C (-29.0 F)
1979	-38.5 C (-37.3 F)
1980	-36.0 C (-32.8 F)
1981	-34.0 C (-29.2 F)
1982	-39.0 C (-38.2 F)
1983	-38.0 C (-36.4 F)

Wettest day (Rx1day)

The wettest day of the year at High River, 1902 to 1983. The record is 160.5 mm (6.3 in) in 1926, marked on the chart; the median year is 35.6 mm (1.4 in).

Wettest day (Rx1day) at High River by year
Year	Wettest day (Rx1day)
1902	73.4 mm (2.9 in)
1903	63.0 mm (2.5 in)
1904	35.1 mm (1.4 in)
1906	3.8 mm (0.15 in)
1907	29.2 mm (1.1 in)
1908	31.8 mm (1.3 in)
1909	16.5 mm (0.6 in)
1910	45.7 mm (1.8 in)
1911	33.0 mm (1.3 in)
1912	38.4 mm (1.5 in)
1913	32.8 mm (1.3 in)
1914	12.7 mm (0.5 in)
1915	26.7 mm (1.1 in)
1916	12.7 mm (0.5 in)
1917	57.9 mm (2.3 in)
1918	45.7 mm (1.8 in)
1919	20.3 mm (0.8 in)
1920	76.2 mm (3.0 in)
1921	35.6 mm (1.4 in)
1922	41.7 mm (1.6 in)
1923	80.8 mm (3.2 in)
1924	56.1 mm (2.2 in)
1925	30.5 mm (1.2 in)
1926	160.5 mm (6.3 in)
1927	76.5 mm (3.0 in)
1928	64.8 mm (2.6 in)
1929	81.8 mm (3.2 in)
1930	111.0 mm (4.4 in)
1931	48.3 mm (1.9 in)
1932	96.3 mm (3.8 in)
1933	40.6 mm (1.6 in)
1934	55.6 mm (2.2 in)
1935	25.4 mm (1.0 in)
1936	23.9 mm (0.9 in)
1937	43.9 mm (1.7 in)
1938	54.9 mm (2.2 in)
1939	45.2 mm (1.8 in)
1940	59.2 mm (2.3 in)
1941	7.6 mm (0.30 in)
1942	72.6 mm (2.9 in)
1943	36.1 mm (1.4 in)
1944	19.8 mm (0.8 in)
1945	70.6 mm (2.8 in)
1946	91.2 mm (3.6 in)
1947	58.2 mm (2.3 in)
1948	25.7 mm (1.0 in)
1949	26.2 mm (1.0 in)
1950	18.0 mm (0.7 in)
1951	56.1 mm (2.2 in)
1952	45.5 mm (1.8 in)
1953	29.2 mm (1.1 in)
1954	35.6 mm (1.4 in)
1955	24.4 mm (1.0 in)
1956	38.9 mm (1.5 in)
1957	27.4 mm (1.1 in)
1958	23.9 mm (0.9 in)
1959	43.9 mm (1.7 in)
1960	24.1 mm (0.9 in)
1961	28.2 mm (1.1 in)
1962	31.2 mm (1.2 in)
1963	84.1 mm (3.3 in)
1964	24.6 mm (1.0 in)
1965	28.4 mm (1.1 in)
1966	26.9 mm (1.1 in)
1967	34.3 mm (1.4 in)
1968	30.5 mm (1.2 in)
1969	57.7 mm (2.3 in)
1970	62.0 mm (2.4 in)
1971	24.4 mm (1.0 in)
1972	50.0 mm (2.0 in)
1973	28.7 mm (1.1 in)
1974	34.3 mm (1.4 in)
1975	33.3 mm (1.3 in)
1976	42.9 mm (1.7 in)
1977	27.9 mm (1.1 in)
1978	34.8 mm (1.4 in)
1979	39.6 mm (1.6 in)
1980	41.0 mm (1.6 in)
1981	51.4 mm (2.0 in)
1982	25.8 mm (1.0 in)
1983	25.2 mm (1.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at High River, 1902 to 1983. The record is 185.1 mm (7.3 in) in 1926, marked on the chart; the median year is 60.3 mm (2.4 in).

Wettest five days (Rx5day) at High River by year
Year	Wettest five days (Rx5day)
1902	106.9 mm (4.2 in)
1903	75.4 mm (3.0 in)
1904	35.1 mm (1.4 in)
1906	7.9 mm (0.31 in)
1907	52.3 mm (2.1 in)
1908	75.7 mm (3.0 in)
1909	31.0 mm (1.2 in)
1910	50.8 mm (2.0 in)
1911	69.9 mm (2.8 in)
1912	54.9 mm (2.2 in)
1913	59.7 mm (2.4 in)
1914	16.5 mm (0.6 in)
1915	28.3 mm (1.1 in)
1916	12.7 mm (0.5 in)
1917	75.0 mm (3.0 in)
1918	53.3 mm (2.1 in)
1919	42.0 mm (1.7 in)
1920	106.7 mm (4.2 in)
1921	35.6 mm (1.4 in)
1922	41.7 mm (1.6 in)
1923	135.4 mm (5.3 in)
1924	84.0 mm (3.3 in)
1925	32.5 mm (1.3 in)
1926	185.1 mm (7.3 in)
1927	76.5 mm (3.0 in)
1928	90.2 mm (3.6 in)
1929	143.0 mm (5.6 in)
1930	116.3 mm (4.6 in)
1931	48.3 mm (1.9 in)
1932	96.3 mm (3.8 in)
1933	61.4 mm (2.4 in)
1934	87.1 mm (3.4 in)
1935	25.4 mm (1.0 in)
1936	24.1 mm (0.9 in)
1937	55.6 mm (2.2 in)
1938	62.8 mm (2.5 in)
1939	132.3 mm (5.2 in)
1940	66.3 mm (2.6 in)
1941	15.2 mm (0.6 in)
1942	92.2 mm (3.6 in)
1943	38.4 mm (1.5 in)
1944	30.7 mm (1.2 in)
1945	71.9 mm (2.8 in)
1946	100.1 mm (3.9 in)
1947	65.8 mm (2.6 in)
1948	61.5 mm (2.4 in)
1949	44.0 mm (1.7 in)
1950	36.3 mm (1.4 in)
1951	108.7 mm (4.3 in)
1952	75.7 mm (3.0 in)
1953	59.5 mm (2.3 in)
1954	67.9 mm (2.7 in)
1955	51.8 mm (2.0 in)
1956	60.3 mm (2.4 in)
1957	40.6 mm (1.6 in)
1958	46.5 mm (1.8 in)
1959	69.8 mm (2.7 in)
1960	47.6 mm (1.9 in)
1961	64.0 mm (2.5 in)
1962	33.0 mm (1.3 in)
1963	148.9 mm (5.9 in)
1964	35.1 mm (1.4 in)
1965	87.9 mm (3.5 in)
1966	47.7 mm (1.9 in)
1967	74.2 mm (2.9 in)
1968	67.5 mm (2.7 in)
1969	120.9 mm (4.8 in)
1970	102.4 mm (4.0 in)
1971	63.7 mm (2.5 in)
1972	70.6 mm (2.8 in)
1973	45.3 mm (1.8 in)
1974	67.1 mm (2.6 in)
1975	55.9 mm (2.2 in)
1976	84.8 mm (3.3 in)
1977	40.5 mm (1.6 in)
1978	57.7 mm (2.3 in)
1979	53.7 mm (2.1 in)
1980	81.2 mm (3.2 in)
1981	60.2 mm (2.4 in)
1982	53.4 mm (2.1 in)
1983	35.6 mm (1.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at High River, 1902 to 1983. The record is 58 days in 1948, marked on the chart; the median year is 31 days.

Longest dry spell (CDD) at High River by year
Year	Longest dry spell (CDD)
1902	24 days
1903	43 days
1904	39 days
1906	15 days
1907	35 days
1908	32 days
1909	31 days
1910	31 days
1911	27 days
1912	17 days
1913	39 days
1914	23 days
1915	18 days
1916	15 days
1917	51 days
1918	29 days
1919	48 days
1920	46 days
1921	41 days
1922	43 days
1923	38 days
1924	25 days
1925	35 days
1926	33 days
1927	28 days
1928	32 days
1929	21 days
1930	29 days
1931	33 days
1932	22 days
1933	55 days
1934	35 days
1935	42 days
1936	43 days
1937	42 days
1938	34 days
1939	43 days
1940	37 days
1941	37 days
1942	27 days
1943	30 days
1944	32 days
1945	29 days
1946	29 days
1947	18 days
1948	58 days
1949	39 days
1950	29 days
1951	14 days
1952	41 days
1953	32 days
1954	56 days
1955	29 days
1956	19 days
1957	21 days
1958	50 days
1959	26 days
1960	30 days
1961	16 days
1962	35 days
1963	50 days
1964	28 days
1965	31 days
1966	25 days
1967	23 days
1968	18 days
1969	35 days
1970	20 days
1971	30 days
1972	25 days
1973	26 days
1974	39 days
1975	19 days
1976	35 days
1977	49 days
1978	12 days
1979	27 days
1980	30 days
1981	44 days
1982	25 days
1983	24 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

66 years with a frost

Across 66 years with a frost, the median last spring frost at High River falls on 11 June and the median first autumn frost on 16 August, which leaves a median of 67 days between them.

In 1953 to 1983 the median growing season was 79 days. That is 17 days more than in 1903 to 1946.

Fitted over all years, the growing season changes by +3.8 days per decade at this station.

Frost dates and growing season at High River
Measure	Median, all years	Earliest period (1903 to 1946)	Recent period (1953 to 1983)	Recent against earliest	Fitted trend
Last spring frost	11 June	12 June	11 June	1 day earlier	-0.1 days per decade
First autumn frost	16 August	3 August	27 August	24 days later	+3.7 days per decade
Growing days	67 days	62 days	79 days	17 days more	+3.8 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

66 years, 1903 to 1983

A day with at least 38.9 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 147.7 mm (5.8 in) of rain is expected about once in 100 years.

Rainfall return levels at High River: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	38.9 mm (1.5 in)
5 years	58.9 mm (2.3 in)
10 years	75.2 mm (3.0 in)
25 years	100.1 mm (3.9 in)
50 years	122.1 mm (4.8 in)
100 years	147.7 mm (5.8 in)	Longer than the 66 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, 66 years of values from 1903 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: 160.5 mm (6.3 in) in 1926; 111.0 mm (4.4 in) in 1930; 96.3 mm (3.8 in) in 1932.

Station Changes

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

Download the Data

Data for High River standing records by year: CSV or JSON. Field meanings are on the data page.
Data for High River 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-13. Last revised 13 October 2026 (2026-10-13).