Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Red Deer. 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, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.7 C (53.1 F)
-46.7 C (-52.1 F)
n/a
n/a
Feb
15.6 C (60.1 F)
-44.4 C (-47.9 F)
n/a
n/a
Mar
21.1 C (70.0 F)
-40.6 C (-41.1 F)
n/a
n/a
Apr
28.3 C (82.9 F)
-31.7 C (-25.1 F)
n/a
n/a
May
33.3 C (91.9 F)
-12.8 C (9.0 F)
n/a
n/a
Jun
37.2 C (99.0 F)
-6.1 C (21.0 F)
n/a
n/a
Jul
37.2 C (99.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
36.1 C (97.0 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
31.7 C (89.1 F)
-12.8 C (9.0 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-26.1 C (-15.0 F)
n/a
n/a
Nov
20.6 C (69.1 F)
-37.2 C (-35.0 F)
n/a
n/a
Dec
15.0 C (59.0 F)
-50.6 C (-59.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Red Deer still stand. 1906 holds the most, with 63.
Standing records at Red Deer by the year they were set
Year set
Standing records
1904
10
1905
3
1906
63
1909
33
1910
35
1911
19
1914
21
1915
17
1916
39
1917
38
1918
32
1919
63
1920
29
1921
32
1922
19
1923
29
1924
40
1925
29
1926
33
1927
15
1928
32
1929
23
1931
2
1932
8
1933
7
1934
37
1935
34
1936
58
1937
22
1938
17
1939
12
1949
22
1950
36
1951
45
1952
16
1953
20
1954
45
1955
21
1956
27
1957
27
1958
15
1959
24
1960
10
1961
39
1962
25
1963
34
1964
26
1965
28
1966
21
1967
16
1968
26
1969
20
1970
20
1971
18
1972
17
1973
13
1974
2
Wettest Day of Each Month
Aug: 154.2 mm (6.1 in)
The wettest day on record for each calendar month at Red Deer. The most was 154.2 mm (6.1 in) on 7 August 1938.
Record daily precipitation for each month at Red Deer
Month
Record daily precipitation (mm)
Date
Jan
22.9 mm (0.9 in)
31 January 1910
Feb
20.3 mm (0.8 in)
29 February 1932
Mar
36.3 mm (1.4 in)
15 March 1927
Apr
62.5 mm (2.5 in)
30 April 1951
May
59.4 mm (2.3 in)
11 May 1954
Jun
86.4 mm (3.4 in)
19 June 1935
Jul
122.7 mm (4.8 in)
15 July 1937
Aug
154.2 mm (6.1 in)
7 August 1938
Sep
48.3 mm (1.9 in)
22 September 1937
Oct
37.3 mm (1.5 in)
2 October 1915
Nov
21.6 mm (0.9 in)
30 November 1972
Dec
35.6 mm (1.4 in)
15 December 1924
Period of Record Coverage
1904 to 1974
Complete yearUnder 90 percent of days
57 years of record at Red Deer, 1904 to 1974. 17 years have data for under 90 percent of days and are left out of rankings: 1904, 1905, 1906, 1910, 1911, 1923, 1929, 1931 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 31 complete years at Red Deer, 1914 to 1973. Blue stripes are years cooler than the station's own mean of 2.3 C (36.2 F); red stripes are warmer. The coolest year was 1951, at 0.2 C (32.3 F), and the warmest was 1963, at 4.3 C (39.7 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Red Deer as warming stripes, 1914 to 1973
Year
Annual mean temperature
Difference from the station mean
1914
1.9 C
-0.49 C
1915
2.8 C
+0.43 C
1916
0.4 C
-1.96 C
1917
1.1 C
-1.29 C
1918
2.4 C
+0.09 C
1920
1.5 C
-0.86 C
1921
1.8 C
-0.52 C
1924
2.1 C
-0.24 C
1925
2.5 C
+0.18 C
1926
3.3 C
+0.99 C
1927
0.6 C
-1.72 C
1928
3.9 C
+1.60 C
1935
1.1 C
-1.28 C
1936
1.4 C
-0.90 C
1937
1.7 C
-0.67 C
1938
3.4 C
+1.03 C
1951
0.2 C
-2.18 C
1952
3.0 C
+0.65 C
1953
3.8 C
+1.45 C
1954
2.2 C
-0.12 C
1955
0.9 C
-1.47 C
1956
2.5 C
+0.13 C
1957
2.9 C
+0.53 C
1958
3.7 C
+1.36 C
1961
3.9 C
+1.56 C
1962
3.9 C
+1.57 C
1963
4.3 C
+1.94 C
1965
2.0 C
-0.36 C
1969
2.2 C
-0.13 C
1970
2.5 C
+0.19 C
1973
3.0 C
+0.64 C
The annual mean temperature here has risen by 0.22 C (0.01 to 0.42) per decade over 1914 to 1973. In Fahrenheit: 0.39 F (0.02 to 0.76) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Red Deer
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.22 C (0.01 to 0.42) per decade
0.39 F (0.02 to 0.76) per decade
1914 to 1973
31
Rise
Mean daily maximum
-0.04 C (-0.27 to 0.18) per decade
-0.1 F (-0.5 to 0.3) per decade
1914 to 1973
31
Not clearly different from zero
Mean daily minimum
0.5 C (0.3 to 0.7) per decade
0.9 F (0.5 to 1.2) per decade
1914 to 1973
31
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
1904 to 1974
Yearly extremes at Red Deer: 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)
1906
31.7 C (89.1 F)
57
Coldest night (TNn)
-50.6 C (-59.1 F)
1924
-37.8 C (-36.0 F)
57
Wettest day (Rx1day)
154.2 mm (6.1 in)
1938
32.5 mm (1.3 in)
57
Wettest five days (Rx5day)
187.8 mm (7.4 in)
1938
55.9 mm (2.2 in)
57
Longest dry spell (CDD)
70 days
1923
28 days
57
Hottest day (TXx)
The hottest day of the year at Red Deer, 1904 to 1974. The record is 37.2 C (99.0 F) in 1906, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Red Deer by year
Year
Hottest day (TXx)
1904
36.1 C (97.0 F)
1905
28.9 C (84.0 F)
1906
37.2 C (99.0 F)
1909
31.1 C (88.0 F)
1910
32.2 C (90.0 F)
1911
28.9 C (84.0 F)
1914
32.2 C (90.0 F)
1915
30.0 C (86.0 F)
1916
28.3 C (82.9 F)
1917
30.0 C (86.0 F)
1918
32.8 C (91.0 F)
1919
32.8 C (91.0 F)
1920
33.3 C (91.9 F)
1921
34.4 C (93.9 F)
1922
34.4 C (93.9 F)
1923
30.6 C (87.1 F)
1924
37.2 C (99.0 F)
1925
33.9 C (93.0 F)
1926
35.0 C (95.0 F)
1927
30.6 C (87.1 F)
1928
32.2 C (90.0 F)
1929
26.1 C (79.0 F)
1931
13.9 C (57.0 F)
1932
15.6 C (60.1 F)
1933
12.2 C (54.0 F)
1934
34.4 C (93.9 F)
1935
34.4 C (93.9 F)
1936
35.6 C (96.1 F)
1937
37.2 C (99.0 F)
1938
35.0 C (95.0 F)
1939
15.0 C (59.0 F)
1949
32.8 C (91.0 F)
1950
31.7 C (89.1 F)
1951
31.1 C (88.0 F)
1952
30.6 C (87.1 F)
1953
31.1 C (88.0 F)
1954
31.7 C (89.1 F)
1955
31.7 C (89.1 F)
1956
31.7 C (89.1 F)
1957
30.6 C (87.1 F)
1958
31.7 C (89.1 F)
1959
34.4 C (93.9 F)
1960
30.0 C (86.0 F)
1961
34.4 C (93.9 F)
1962
31.7 C (89.1 F)
1963
30.6 C (87.1 F)
1964
33.3 C (91.9 F)
1965
31.7 C (89.1 F)
1966
32.2 C (90.0 F)
1967
32.8 C (91.0 F)
1968
30.0 C (86.0 F)
1969
32.2 C (90.0 F)
1970
32.8 C (91.0 F)
1971
33.3 C (91.9 F)
1972
31.7 C (89.1 F)
1973
31.7 C (89.1 F)
1974
22.2 C (72.0 F)
Coldest night (TNn)
The coldest night of the year at Red Deer, 1904 to 1974. The record is -50.6 C (-59.1 F) in 1924, marked on the chart; the median year is -37.8 C (-36.0 F).
Coldest night (TNn) at Red Deer by year
Year
Coldest night (TNn)
1904
-11.7 C (10.9 F)
1905
-6.1 C (21.0 F)
1906
-6.7 C (19.9 F)
1909
-42.2 C (-44.0 F)
1910
-40.0 C (-40.0 F)
1911
-13.9 C (7.0 F)
1914
-40.0 C (-40.0 F)
1915
-32.8 C (-27.0 F)
1916
-46.1 C (-51.0 F)
1917
-46.7 C (-52.1 F)
1918
-42.8 C (-45.0 F)
1919
-40.0 C (-40.0 F)
1920
-46.1 C (-51.0 F)
1921
-37.8 C (-36.0 F)
1922
-41.7 C (-43.1 F)
1923
-41.7 C (-43.1 F)
1924
-50.6 C (-59.1 F)
1925
-35.6 C (-32.1 F)
1926
-36.7 C (-34.1 F)
1927
-42.2 C (-44.0 F)
1928
-40.6 C (-41.1 F)
1929
-46.7 C (-52.1 F)
1931
-31.1 C (-24.0 F)
1932
-44.4 C (-47.9 F)
1933
-35.0 C (-31.0 F)
1934
-37.2 C (-35.0 F)
1935
-46.7 C (-52.1 F)
1936
-43.9 C (-47.0 F)
1937
-40.0 C (-40.0 F)
1938
-37.8 C (-36.0 F)
1939
-42.2 C (-44.0 F)
1949
-16.1 C (3.0 F)
1950
-44.4 C (-47.9 F)
1951
-40.6 C (-41.1 F)
1952
-37.2 C (-35.0 F)
1953
-30.6 C (-23.1 F)
1954
-41.1 C (-42.0 F)
1955
-35.6 C (-32.1 F)
1956
-39.4 C (-38.9 F)
1957
-37.2 C (-35.0 F)
1958
-36.7 C (-34.1 F)
1959
-33.3 C (-27.9 F)
1960
-37.2 C (-35.0 F)
1961
-35.0 C (-31.0 F)
1962
-36.1 C (-33.0 F)
1963
-35.6 C (-32.1 F)
1964
-38.9 C (-38.0 F)
1965
-35.0 C (-31.0 F)
1966
-37.8 C (-36.0 F)
1967
-31.7 C (-25.1 F)
1968
-35.0 C (-31.0 F)
1969
-42.2 C (-44.0 F)
1970
-40.0 C (-40.0 F)
1971
-35.6 C (-32.1 F)
1972
-41.7 C (-43.1 F)
1973
-31.1 C (-24.0 F)
1974
-36.7 C (-34.1 F)
Wettest day (Rx1day)
The wettest day of the year at Red Deer, 1904 to 1974. The record is 154.2 mm (6.1 in) in 1938, marked on the chart; the median year is 32.5 mm (1.3 in).
Wettest day (Rx1day) at Red Deer by year
Year
Wettest day (Rx1day)
1904
63.5 mm (2.5 in)
1905
33.3 mm (1.3 in)
1906
26.9 mm (1.1 in)
1909
28.7 mm (1.1 in)
1910
25.4 mm (1.0 in)
1911
32.0 mm (1.3 in)
1914
43.2 mm (1.7 in)
1915
53.6 mm (2.1 in)
1916
66.0 mm (2.6 in)
1917
22.9 mm (0.9 in)
1918
29.2 mm (1.1 in)
1919
29.2 mm (1.1 in)
1920
19.1 mm (0.8 in)
1921
25.7 mm (1.0 in)
1922
17.0 mm (0.7 in)
1923
36.3 mm (1.4 in)
1924
63.0 mm (2.5 in)
1925
19.6 mm (0.8 in)
1926
41.4 mm (1.6 in)
1927
36.3 mm (1.4 in)
1928
57.2 mm (2.3 in)
1929
12.7 mm (0.5 in)
1931
12.7 mm (0.5 in)
1932
20.3 mm (0.8 in)
1933
12.7 mm (0.5 in)
1934
52.8 mm (2.1 in)
1935
86.4 mm (3.4 in)
1936
44.7 mm (1.8 in)
1937
122.7 mm (4.8 in)
1938
154.2 mm (6.1 in)
1939
10.2 mm (0.4 in)
1949
80.8 mm (3.2 in)
1950
24.6 mm (1.0 in)
1951
62.5 mm (2.5 in)
1952
26.9 mm (1.1 in)
1953
53.1 mm (2.1 in)
1954
60.5 mm (2.4 in)
1955
29.2 mm (1.1 in)
1956
37.1 mm (1.5 in)
1957
22.9 mm (0.9 in)
1958
28.2 mm (1.1 in)
1959
58.2 mm (2.3 in)
1960
34.8 mm (1.4 in)
1961
25.9 mm (1.0 in)
1962
32.5 mm (1.3 in)
1963
37.1 mm (1.5 in)
1964
37.6 mm (1.5 in)
1965
24.6 mm (1.0 in)
1966
25.9 mm (1.0 in)
1967
20.6 mm (0.8 in)
1968
52.6 mm (2.1 in)
1969
37.3 mm (1.5 in)
1970
72.4 mm (2.9 in)
1971
16.5 mm (0.6 in)
1972
30.0 mm (1.2 in)
1973
36.6 mm (1.4 in)
1974
15.2 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Red Deer, 1904 to 1974. The record is 187.8 mm (7.4 in) in 1938, marked on the chart; the median year is 55.9 mm (2.2 in).
Wettest five days (Rx5day) at Red Deer by year
Year
Wettest five days (Rx5day)
1904
63.8 mm (2.5 in)
1905
49.5 mm (1.9 in)
1906
26.9 mm (1.1 in)
1909
37.6 mm (1.5 in)
1910
55.9 mm (2.2 in)
1911
51.8 mm (2.0 in)
1914
144.8 mm (5.7 in)
1915
68.3 mm (2.7 in)
1916
71.1 mm (2.8 in)
1917
27.5 mm (1.1 in)
1918
32.3 mm (1.3 in)
1919
53.3 mm (2.1 in)
1920
35.6 mm (1.4 in)
1921
47.0 mm (1.9 in)
1922
43.2 mm (1.7 in)
1923
67.5 mm (2.7 in)
1924
95.8 mm (3.8 in)
1925
46.0 mm (1.8 in)
1926
87.1 mm (3.4 in)
1927
58.7 mm (2.3 in)
1928
103.3 mm (4.1 in)
1929
12.7 mm (0.5 in)
1931
12.7 mm (0.5 in)
1932
25.4 mm (1.0 in)
1933
20.3 mm (0.8 in)
1934
92.3 mm (3.6 in)
1935
107.7 mm (4.2 in)
1936
51.9 mm (2.0 in)
1937
146.0 mm (5.7 in)
1938
187.8 mm (7.4 in)
1939
15.8 mm (0.6 in)
1949
95.8 mm (3.8 in)
1950
63.5 mm (2.5 in)
1951
90.3 mm (3.6 in)
1952
61.4 mm (2.4 in)
1953
67.6 mm (2.7 in)
1954
115.6 mm (4.6 in)
1955
51.1 mm (2.0 in)
1956
77.5 mm (3.1 in)
1957
34.1 mm (1.3 in)
1958
77.6 mm (3.1 in)
1959
64.8 mm (2.6 in)
1960
63.5 mm (2.5 in)
1961
39.6 mm (1.6 in)
1962
49.9 mm (2.0 in)
1963
41.3 mm (1.6 in)
1964
52.4 mm (2.1 in)
1965
47.2 mm (1.9 in)
1966
32.8 mm (1.3 in)
1967
45.8 mm (1.8 in)
1968
87.9 mm (3.5 in)
1969
65.2 mm (2.6 in)
1970
115.1 mm (4.5 in)
1971
49.6 mm (2.0 in)
1972
70.7 mm (2.8 in)
1973
66.0 mm (2.6 in)
1974
25.3 mm (1.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Red Deer, 1904 to 1974. The record is 70 days in 1923, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Red Deer by year
Year
Longest dry spell (CDD)
1904
24 days
1905
15 days
1906
21 days
1909
21 days
1910
29 days
1911
20 days
1914
30 days
1915
50 days
1916
30 days
1917
42 days
1918
39 days
1919
36 days
1920
20 days
1921
22 days
1922
21 days
1923
70 days
1924
24 days
1925
28 days
1926
26 days
1927
31 days
1928
47 days
1929
36 days
1931
33 days
1932
23 days
1933
21 days
1934
36 days
1935
25 days
1936
16 days
1937
30 days
1938
40 days
1939
18 days
1949
25 days
1950
21 days
1951
31 days
1952
43 days
1953
55 days
1954
52 days
1955
30 days
1956
18 days
1957
21 days
1958
31 days
1959
26 days
1960
30 days
1961
19 days
1962
38 days
1963
19 days
1964
30 days
1965
29 days
1966
40 days
1967
35 days
1968
22 days
1969
28 days
1970
16 days
1971
44 days
1972
23 days
1973
25 days
1974
19 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
31 years with a frost
Across 31 years with a frost, the median last spring frost at Red Deer falls on 28 May and the median first autumn frost on 4 September, which leaves a median of 100 days between them.
Fitted over all years, the growing season changes by +6.0 days per decade at this station.
Frost dates and growing season at Red Deer
Measure
Median, all years
Earliest period
Recent period (1915 to 1973)
Recent against earliest
Fitted trend
Last spring frost
28 May
n/a
28 May
n/a
-2.8 days per decade
First autumn frost
4 September
n/a
5 September
n/a
+3.2 days per decade
Growing days
100 days
n/a
101 days
n/a
+6.0 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
40 years, 1909 to 1973
A day with at least 36.4 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 163.0 mm (6.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Red Deer: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
36.4 mm (1.4 in)
5 years
56.6 mm (2.2 in)
10 years
74.2 mm (2.9 in)
25 years
102.8 mm (4.0 in)
50 years
129.9 mm (5.1 in)
Longer than the 40 years of record
100 years
163.0 mm (6.4 in)
Longer than the 40 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, 40 years of values from 1909 to 1973.
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: 154.2 mm (6.1 in) in 1938; 122.7 mm (4.8 in) in 1937; 86.4 mm (3.4 in) in 1935.
Download the Data
Data for Red Deer standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Red Deer 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.