Red Deer A Weather Records (CA003025480)

Record envelope, standing records and threshold days for Red Deer A (CA003025480), Alberta, Canada, with 77 years of record.

Key Facts for Red Deer A

Red Deer A (CA003025480) is a weather station in Alberta, Canada at 52.18 latitude and -113.90 longitude, 905 m (2,969 ft) above sea level.
The station reports from 1938 to 2014, 77 years of record.
1,464 records set at Red Deer A still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Red Deer A set a daily record precipitation of 4.9 mm (0.19 in) on 26 December 1983.

About the Station

Location: Alberta, Canada, 52.18 latitude, -113.90 longitude.
Elevation: 905 m (2,969 ft).
Period of record: 1938 to 2014, 77 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 Red Deer 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 Red Deer A, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.6 C (51.1 F)	-46.1 C (-51.0 F)	n/a	n/a
Feb	12.8 C (55.0 F)	-43.9 C (-47.0 F)	n/a	n/a
Mar	19.4 C (66.9 F)	-42.8 C (-45.0 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-24.4 C (-11.9 F)	n/a	n/a
May	32.2 C (90.0 F)	-15.6 C (3.9 F)	n/a	n/a
Jun	32.8 C (91.0 F)	-5.0 C (23.0 F)	n/a	n/a
Jul	36.1 C (97.0 F)	1.1 C (34.0 F)	n/a	n/a
Aug	35.0 C (95.0 F)	-2.2 C (28.0 F)	n/a	n/a
Sep	35.0 C (95.0 F)	-11.7 C (10.9 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-25.6 C (-14.1 F)	n/a	n/a
Nov	22.8 C (73.0 F)	-37.2 C (-35.0 F)	n/a	n/a
Dec	17.2 C (63.0 F)	-44.1 C (-47.4 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Red Deer A still stand. 1939 holds the most, with 64.

Standing records at Red Deer A by the year they were set
Year set	Standing records
1938	23
1939	64
1940	42
1941	33
1942	34
1943	35
1944	19
1945	33
1946	24
1947	28
1948	27
1949	40
1950	52
1951	63
1952	26
1953	29
1954	43
1955	33
1956	38
1957	37
1958	27
1959	31
1960	21
1961	43
1962	27
1963	41
1964	33
1965	35
1966	18
1967	22
1968	45
1969	30
1970	33
1971	29
1972	33
1973	19
1974	13
1975	31
1976	19
1977	39
1978	19
1979	28
1980	31
1981	35
1982	15
1983	24

All-Time Record Progression

2 new records

2 all-time records were set at Red Deer A between 26 January 1972 and 30 December 1975. Each dot is a new record.

When Red Deer A set new all-time records
Date	Kind	Detail
1972-01-26	Record low minimum temperature	Record low minimum temperature -46.1 C (-51.0 F)
1975-12-30	Record daily snowfall	Record daily snowfall 32.3 cm (12.7 in)

Wettest Day of Each Month

Aug: 124.2 mm (4.9 in)

The wettest day on record for each calendar month at Red Deer A. The most was 124.2 mm (4.9 in) on 7 August 1938.

Record daily precipitation for each month at Red Deer A
Month	Record daily precipitation (mm)	Date
Jan	15.7 mm (0.6 in)	13 January 1963
Feb	16.5 mm (0.6 in)	9 February 1960
Mar	27.4 mm (1.1 in)	5 March 1958
Apr	48.0 mm (1.9 in)	30 April 1951
May	47.0 mm (1.9 in)	6 May 1981
Jun	99.6 mm (3.9 in)	30 June 1970
Jul	85.3 mm (3.4 in)	16 July 1949
Aug	124.2 mm (4.9 in)	7 August 1938
Sep	62.5 mm (2.5 in)	4 September 1969
Oct	30.5 mm (1.2 in)	5 October 1970
Nov	22.9 mm (0.9 in)	15 November 1942
Dec	16.0 mm (0.6 in)	3 December 1956

Period of Record Coverage

1938 to 1983

46 years of record at Red Deer A, 1938 to 1983. Every year has data for at least 90 percent of its days.

Days with data per year at Red Deer A
Year	Days with data	Share of year	Complete
1938	332	91%	Yes
1939	365	100%	Yes
1940	362	99%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	366	100%	Yes
1945	364	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	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	364	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	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	348	95%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes

Latest Records

Latest records at Red Deer A
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 December 1983	Red Deer A, CA	daily rain	4.9 mm (0.19 in)	3.6 mm (0.14 in)	44 years	20 of 100 (Routine)
26 December 1983	Red Deer A, CA	daily snowfall	6.8 cm (2.7 in)	5.3 cm (2.1 in)	14 years	25 of 100 (Routine)
24 December 1983	Red Deer A, CA	daily low max	-27.2 C (-17.0 F)	1.6 C (2.9 F)	18 years	10 of 100 (Routine)
24 December 1983	Red Deer A, CA	daily low min (Tie)	-38.9 C (-38.0 F)	tie	28 years	3 of 100 (Routine)
23 December 1983	Red Deer A, CA	daily low min	-37.0 C (-34.6 F)	0.3 C (0.5 F)	12 years	7 of 100 (Routine)
22 December 1983	Red Deer A, CA	daily low max	-21.4 C (-6.5 F)	0.3 C (0.5 F)	18 years	9 of 100 (Routine)
20 November 1983	Red Deer A, CA	daily high min	-2.5 C (27.5 F)	0.3 C (0.5 F)	14 years	8 of 100 (Routine)
30 September 1983	Red Deer A, CA	daily low min	-6.8 C (19.8 F)	0.1 C (0.2 F)	34 years	14 of 100 (Routine)
28 September 1983	Red Deer A, CA	daily low min	-8.4 C (16.9 F)	2.3 C (4.1 F)	17 years	15 of 100 (Routine)
26 September 1983	Red Deer A, CA	daily high min	10.9 C (51.6 F)	2.6 C (4.7 F)	44 years	24 of 100 (Routine)
20 September 1983	Red Deer A, CA	daily low min	-6.2 C (20.8 F)	0.6 C (1.1 F)	33 years	15 of 100 (Routine)
19 September 1983	Red Deer A, CA	daily low min	-6.3 C (20.7 F)	2.4 C (4.3 F)	40 years	22 of 100 (Routine)
6 September 1983	Red Deer A, CA	daily low min	-2.3 C (27.9 F)	0.6 C (1.1 F)	17 years	10 of 100 (Routine)
29 August 1983	Red Deer A, CA	daily high max	27.1 C (80.8 F)	0.4 C (0.7 F)	42 years	16 of 100 (Routine)
11 August 1983	Red Deer A, CA	daily high min	15.1 C (59.2 F)	1.8 C (3.2 F)	25 years	16 of 100 (Routine)
10 August 1983	Red Deer A, CA	daily high max	32.4 C (90.3 F)	1.3 C (2.3 F)	40 years	18 of 100 (Routine)
27 July 1983	Red Deer A, CA	daily low min	3.5 C (38.3 F)	1.5 C (2.7 F)	40 years	21 of 100 (Routine)
15 July 1983	Red Deer A, CA	daily low max	12.4 C (54.3 F)	1.5 C (2.7 F)	20 years	13 of 100 (Routine)
14 May 1983	Red Deer A, CA	daily snowfall	0.8 cm (0.3 in)	0.3 cm (0.1 in)	40 years	16 of 100 (Routine)
14 May 1983	Red Deer A, CA	daily low max	5.6 C (42.1 F)	0.5 C (0.9 F)	34 years	14 of 100 (Routine)

Climate Trend

44 complete years, 1939 to 1983

One stripe for each of 44 complete years at Red Deer A, 1939 to 1983. Blue stripes are years cooler than the station's own mean of 2.0 C (35.6 F); red stripes are warmer. The coolest year was 1951, at -0.6 C (30.9 F), and the warmest was 1981, at 4.4 C (39.9 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Red Deer A as warming stripes, 1939 to 1983
Year	Annual mean temperature	Difference from the station mean
1939	2.7 C	+0.68 C
1940	2.2 C	+0.17 C
1941	3.6 C	+1.54 C
1942	2.6 C	+0.58 C
1943	2.2 C	+0.17 C
1944	3.4 C	+1.35 C
1945	0.9 C	-1.07 C
1946	2.1 C	+0.05 C
1947	2.0 C	0.00 C
1948	1.3 C	-0.72 C
1949	1.7 C	-0.32 C
1950	-0.4 C	-2.44 C
1951	-0.6 C	-2.61 C
1952	2.1 C	+0.13 C
1953	3.2 C	+1.17 C
1954	1.7 C	-0.28 C
1955	0.4 C	-1.62 C
1956	1.7 C	-0.29 C
1957	2.5 C	+0.51 C
1958	3.4 C	+1.41 C
1959	2.3 C	+0.28 C
1960	2.7 C	+0.64 C
1961	3.4 C	+1.43 C
1962	3.3 C	+1.27 C
1963	3.8 C	+1.74 C
1964	2.3 C	+0.27 C
1965	1.3 C	-0.67 C
1966	0.9 C	-1.08 C
1967	1.9 C	-0.07 C
1968	2.2 C	+0.19 C
1969	1.1 C	-0.91 C
1970	1.4 C	-0.63 C
1971	1.7 C	-0.35 C
1972	0.5 C	-1.47 C
1973	1.6 C	-0.37 C
1974	1.8 C	-0.23 C
1975	0.8 C	-1.19 C
1976	3.0 C	+1.02 C
1977	2.4 C	+0.39 C
1978	1.9 C	-0.12 C
1980	2.1 C	+0.06 C
1981	4.4 C	+2.36 C
1982	0.5 C	-1.48 C
1983	2.6 C	+0.59 C

The fitted trend in annual mean temperature here over 1939 to 1983 is -0.02 C (-0.28 to 0.23) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.04 F (-0.50 to 0.42) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Red Deer A
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.02 C (-0.28 to 0.23) per decade	-0.04 F (-0.50 to 0.42) per decade	1939 to 1983	44	Not clearly different from zero
Mean daily maximum	-0.1 C (-0.3 to 0.2) per decade	-0.1 F (-0.6 to 0.4) per decade	1939 to 1983	44	Not clearly different from zero
Mean daily minimum	0.01 C (-0.26 to 0.28) per decade	0.01 F (-0.47 to 0.50) per decade	1939 to 1983	44	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

1938 to 1983

Yearly extremes at Red Deer 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)	1941	31.7 C (89.1 F)	46
Coldest night (TNn)	-46.1 C (-51.0 F)	1972	-38.0 C (-36.5 F)	46
Wettest day (Rx1day)	124.2 mm (4.9 in)	1938	39.0 mm (1.5 in)	46
Wettest five days (Rx5day)	139.2 mm (5.5 in)	1938	57.3 mm (2.3 in)	46
Longest dry spell (CDD)	61 days	1977	31 days	46

Hottest day (TXx)

The hottest day of the year at Red Deer A, 1938 to 1983. The record is 36.1 C (97.0 F) in 1941, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at Red Deer A by year
Year	Hottest day (TXx)
1938	32.8 C (91.0 F)
1939	32.2 C (90.0 F)
1940	35.0 C (95.0 F)
1941	36.1 C (97.0 F)
1942	31.7 C (89.1 F)
1943	30.6 C (87.1 F)
1944	30.6 C (87.1 F)
1945	31.1 C (88.0 F)
1946	32.8 C (91.0 F)
1947	28.9 C (84.0 F)
1948	28.9 C (84.0 F)
1949	32.2 C (90.0 F)
1950	31.1 C (88.0 F)
1951	30.0 C (86.0 F)
1952	30.0 C (86.0 F)
1953	30.6 C (87.1 F)
1954	32.2 C (90.0 F)
1955	31.7 C (89.1 F)
1956	32.2 C (90.0 F)
1957	30.0 C (86.0 F)
1958	31.1 C (88.0 F)
1959	33.9 C (93.0 F)
1960	34.4 C (93.9 F)
1961	34.4 C (93.9 F)
1962	31.7 C (89.1 F)
1963	31.1 C (88.0 F)
1964	32.8 C (91.0 F)
1965	31.1 C (88.0 F)
1966	30.0 C (86.0 F)
1967	35.0 C (95.0 F)
1968	33.9 C (93.0 F)
1969	32.8 C (91.0 F)
1970	32.8 C (91.0 F)
1971	33.9 C (93.0 F)
1972	30.0 C (86.0 F)
1973	30.6 C (87.1 F)
1974	31.1 C (88.0 F)
1975	33.9 C (93.0 F)
1976	28.9 C (84.0 F)
1977	31.6 C (88.9 F)
1978	31.9 C (89.4 F)
1979	33.6 C (92.5 F)
1980	29.3 C (84.7 F)
1981	32.5 C (90.5 F)
1982	29.2 C (84.6 F)
1983	32.4 C (90.3 F)

Coldest night (TNn)

The coldest night of the year at Red Deer A, 1938 to 1983. The record is -46.1 C (-51.0 F) in 1972, marked on the chart; the median year is -38.0 C (-36.5 F).

Coldest night (TNn) at Red Deer A by year
Year	Coldest night (TNn)
1938	-40.0 C (-40.0 F)
1939	-43.9 C (-47.0 F)
1940	-35.0 C (-31.0 F)
1941	-37.2 C (-35.0 F)
1942	-32.8 C (-27.0 F)
1943	-45.6 C (-50.1 F)
1944	-31.7 C (-25.1 F)
1945	-37.8 C (-36.0 F)
1946	-37.2 C (-35.0 F)
1947	-41.1 C (-42.0 F)
1948	-34.4 C (-29.9 F)
1949	-40.0 C (-40.0 F)
1950	-45.0 C (-49.0 F)
1951	-42.8 C (-45.0 F)
1952	-40.0 C (-40.0 F)
1953	-34.4 C (-29.9 F)
1954	-42.8 C (-45.0 F)
1955	-38.9 C (-38.0 F)
1956	-43.9 C (-47.0 F)
1957	-41.1 C (-42.0 F)
1958	-35.0 C (-31.0 F)
1959	-33.3 C (-27.9 F)
1960	-37.2 C (-35.0 F)
1961	-36.1 C (-33.0 F)
1962	-35.6 C (-32.1 F)
1963	-36.7 C (-34.1 F)
1964	-36.7 C (-34.1 F)
1965	-35.0 C (-31.0 F)
1966	-38.9 C (-38.0 F)
1967	-34.4 C (-29.9 F)
1968	-38.3 C (-36.9 F)
1969	-42.8 C (-45.0 F)
1970	-42.8 C (-45.0 F)
1971	-38.9 C (-38.0 F)
1972	-46.1 C (-51.0 F)
1973	-35.0 C (-31.0 F)
1974	-40.6 C (-41.1 F)
1975	-38.3 C (-36.9 F)
1976	-37.2 C (-35.0 F)
1977	-44.1 C (-47.4 F)
1978	-40.4 C (-40.7 F)
1979	-37.4 C (-35.3 F)
1980	-36.5 C (-33.7 F)
1981	-33.9 C (-29.0 F)
1982	-37.0 C (-34.6 F)
1983	-38.9 C (-38.0 F)

Wettest day (Rx1day)

The wettest day of the year at Red Deer A, 1938 to 1983. The record is 124.2 mm (4.9 in) in 1938, marked on the chart; the median year is 39.0 mm (1.5 in).

Wettest day (Rx1day) at Red Deer A by year
Year	Wettest day (Rx1day)
1938	124.2 mm (4.9 in)
1939	21.3 mm (0.8 in)
1940	22.6 mm (0.9 in)
1941	45.5 mm (1.8 in)
1942	41.1 mm (1.6 in)
1943	21.6 mm (0.9 in)
1944	44.7 mm (1.8 in)
1945	41.9 mm (1.6 in)
1946	42.7 mm (1.7 in)
1947	41.9 mm (1.6 in)
1948	61.2 mm (2.4 in)
1949	85.3 mm (3.4 in)
1950	20.3 mm (0.8 in)
1951	48.0 mm (1.9 in)
1952	29.0 mm (1.1 in)
1953	39.6 mm (1.6 in)
1954	37.1 mm (1.5 in)
1955	24.6 mm (1.0 in)
1956	41.7 mm (1.6 in)
1957	29.2 mm (1.1 in)
1958	49.0 mm (1.9 in)
1959	45.2 mm (1.8 in)
1960	30.5 mm (1.2 in)
1961	30.7 mm (1.2 in)
1962	44.2 mm (1.7 in)
1963	29.7 mm (1.2 in)
1964	27.4 mm (1.1 in)
1965	41.7 mm (1.6 in)
1966	39.6 mm (1.6 in)
1967	35.8 mm (1.4 in)
1968	72.9 mm (2.9 in)
1969	62.5 mm (2.5 in)
1970	99.6 mm (3.9 in)
1971	38.4 mm (1.5 in)
1972	32.3 mm (1.3 in)
1973	31.8 mm (1.3 in)
1974	30.7 mm (1.2 in)
1975	22.1 mm (0.9 in)
1976	28.2 mm (1.1 in)
1977	39.8 mm (1.6 in)
1978	64.8 mm (2.6 in)
1979	14.2 mm (0.6 in)
1980	23.6 mm (0.9 in)
1981	47.0 mm (1.9 in)
1982	34.3 mm (1.4 in)
1983	32.6 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Red Deer A, 1938 to 1983. The record is 139.2 mm (5.5 in) in 1938, marked on the chart; the median year is 57.3 mm (2.3 in).

Wettest five days (Rx5day) at Red Deer A by year
Year	Wettest five days (Rx5day)
1938	139.2 mm (5.5 in)
1939	40.4 mm (1.6 in)
1940	37.9 mm (1.5 in)
1941	74.9 mm (2.9 in)
1942	56.6 mm (2.2 in)
1943	34.1 mm (1.3 in)
1944	60.4 mm (2.4 in)
1945	48.0 mm (1.9 in)
1946	53.6 mm (2.1 in)
1947	58.2 mm (2.3 in)
1948	77.5 mm (3.1 in)
1949	104.2 mm (4.1 in)
1950	52.6 mm (2.1 in)
1951	69.8 mm (2.7 in)
1952	47.3 mm (1.9 in)
1953	51.0 mm (2.0 in)
1954	72.9 mm (2.9 in)
1955	55.1 mm (2.2 in)
1956	83.4 mm (3.3 in)
1957	42.0 mm (1.7 in)
1958	64.3 mm (2.5 in)
1959	75.7 mm (3.0 in)
1960	57.9 mm (2.3 in)
1961	40.9 mm (1.6 in)
1962	53.9 mm (2.1 in)
1963	43.4 mm (1.7 in)
1964	51.0 mm (2.0 in)
1965	50.6 mm (2.0 in)
1966	69.9 mm (2.8 in)
1967	45.5 mm (1.8 in)
1968	106.9 mm (4.2 in)
1969	92.9 mm (3.7 in)
1970	134.2 mm (5.3 in)
1971	60.3 mm (2.4 in)
1972	51.3 mm (2.0 in)
1973	67.8 mm (2.7 in)
1974	52.1 mm (2.1 in)
1975	37.8 mm (1.5 in)
1976	44.4 mm (1.7 in)
1977	66.6 mm (2.6 in)
1978	93.5 mm (3.7 in)
1979	23.8 mm (0.9 in)
1980	79.9 mm (3.1 in)
1981	75.4 mm (3.0 in)
1982	73.3 mm (2.9 in)
1983	48.4 mm (1.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Red Deer A, 1938 to 1983. The record is 61 days in 1977, marked on the chart; the median year is 31 days.

Longest dry spell (CDD) at Red Deer A by year
Year	Longest dry spell (CDD)
1938	41 days
1939	43 days
1940	20 days
1941	36 days
1942	28 days
1943	34 days
1944	42 days
1945	32 days
1946	32 days
1947	17 days
1948	36 days
1949	33 days
1950	29 days
1951	20 days
1952	41 days
1953	48 days
1954	53 days
1955	24 days
1956	23 days
1957	22 days
1958	32 days
1959	20 days
1960	36 days
1961	30 days
1962	29 days
1963	30 days
1964	16 days
1965	30 days
1966	23 days
1967	28 days
1968	24 days
1969	29 days
1970	17 days
1971	27 days
1972	33 days
1973	30 days
1974	39 days
1975	22 days
1976	51 days
1977	61 days
1978	41 days
1979	38 days
1980	27 days
1981	31 days
1982	37 days
1983	33 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

44 years with a frost

Across 44 years with a frost, the median last spring frost at Red Deer A falls on 24 May and the median first autumn frost on 8 September, which leaves a median of 107 days between them.

Fitted over all years, the growing season changes by +3.9 days per decade at this station.

Frost dates and growing season at Red Deer A
Measure	Median, all years	Earliest period	Recent period (1953 to 1983)	Recent against earliest	Fitted trend
Last spring frost	24 May	n/a	23 May	n/a	-2.3 days per decade
First autumn frost	8 September	n/a	8 September	n/a	+1.6 days per decade
Growing days	107 days	n/a	110 days	n/a	+3.9 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

46 years, 1938 to 1983

A day with at least 36.1 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 123.5 mm (4.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Red Deer 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	36.1 mm (1.4 in)
5 years	52.2 mm (2.1 in)
10 years	65.3 mm (2.6 in)
25 years	85.2 mm (3.4 in)
50 years	102.9 mm (4.1 in)	Longer than the 46 years of record
100 years	123.5 mm (4.9 in)	Longer than the 46 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, 46 years of values from 1938 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: 124.2 mm (4.9 in) in 1938; 99.6 mm (3.9 in) in 1970; 85.3 mm (3.4 in) in 1949.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Red Deer A, at 1953 and 1968. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1953 ran 0.4 C (0.7 F) higher than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1968 ran 0.3 C (0.6 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Red Deer A, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1953	+0.4	+0.7	possible	5
1968	-0.3	-0.6	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 Red Deer A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Red Deer 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).