Record highRecord low2026 daily maximum2026 daily minimum
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
Year with most
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
Complete yearUnder 90 percent of days
46 years of record at Red Deer A, 1938 to 1983. Every year has data for at least 90 percent of its days.
Cooler than the station meanWarmer than the station mean
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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.