Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Athabasca. 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 Athabasca, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.8 C (55.0 F)
-51.7 C (-61.1 F)
n/a
n/a
Feb
14.4 C (57.9 F)
-48.3 C (-54.9 F)
n/a
n/a
Mar
18.3 C (64.9 F)
-43.9 C (-47.0 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-31.7 C (-25.1 F)
n/a
n/a
May
33.3 C (91.9 F)
-12.2 C (10.0 F)
n/a
n/a
Jun
33.9 C (93.0 F)
-6.7 C (19.9 F)
n/a
n/a
Jul
38.3 C (100.9 F)
-5.0 C (23.0 F)
n/a
n/a
Aug
34.4 C (93.9 F)
-6.7 C (19.9 F)
n/a
n/a
Sep
30.0 C (86.0 F)
-15.0 C (5.0 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Nov
21.1 C (70.0 F)
-45.6 C (-50.1 F)
n/a
n/a
Dec
11.1 C (52.0 F)
-46.7 C (-52.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Athabasca still stand. 1919 holds the most, with 59.
Standing records at Athabasca by the year they were set
Year set
Standing records
1918
23
1919
59
1920
30
1921
37
1922
28
1923
41
1924
35
1925
32
1926
51
1927
31
1928
37
1929
33
1930
36
1931
35
1932
31
1933
38
1934
44
1935
22
1938
25
1939
42
1940
38
1941
25
1942
41
1943
38
1944
35
1945
33
1946
36
1947
19
1948
24
1949
42
1950
59
1951
41
1952
39
1953
24
1954
40
1955
26
1956
49
1957
29
1958
11
1959
35
1960
16
1961
16
1962
12
1965
11
1966
14
1967
1
Wettest Day of Each Month
Jun: 87.9 mm (3.5 in)
The wettest day on record for each calendar month at Athabasca. The most was 87.9 mm (3.5 in) on 30 June 1931.
Record daily precipitation for each month at Athabasca
Month
Record daily precipitation (mm)
Date
Jan
22.9 mm (0.9 in)
25 January 1935
Feb
30.5 mm (1.2 in)
22 February 1956
Mar
30.5 mm (1.2 in)
12 March 1933
Apr
27.9 mm (1.1 in)
12 April 1951
May
47.2 mm (1.9 in)
30 May 1934
Jun
87.9 mm (3.5 in)
30 June 1931
Jul
45.7 mm (1.8 in)
1 July 1930
Aug
74.9 mm (2.9 in)
31 August 1954
Sep
42.7 mm (1.7 in)
15 September 1955
Oct
22.9 mm (0.9 in)
7 October 1926
Nov
25.4 mm (1.0 in)
25 November 1947
Dec
30.5 mm (1.2 in)
5 December 1929
Period of Record Coverage
1918 to 1967
Complete yearUnder 90 percent of days
46 years of record at Athabasca, 1918 to 1967. 8 years have data for under 90 percent of days and are left out of rankings: 1918, 1954, 1958, 1961, 1962, 1965, 1966, 1967.
Cooler than the station meanWarmer than the station mean
One stripe for each of 30 complete years at Athabasca, 1920 to 1960. Blue stripes are years cooler than the station's own mean of 0.8 C (33.5 F); red stripes are warmer. The coolest year was 1950, at -1.7 C (28.9 F), and the warmest was 1931, at 2.6 C (36.7 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Athabasca as warming stripes, 1920 to 1960
Year
Annual mean temperature
Difference from the station mean
1920
0.4 C
-0.46 C
1921
1.1 C
+0.22 C
1922
0.2 C
-0.61 C
1923
1.4 C
+0.53 C
1924
0.4 C
-0.45 C
1925
0.4 C
-0.47 C
1926
1.8 C
+0.95 C
1927
-0.8 C
-1.63 C
1928
2.1 C
+1.29 C
1929
0.1 C
-0.70 C
1930
2.2 C
+1.38 C
1931
2.6 C
+1.77 C
1932
0.5 C
-0.31 C
1933
-1.0 C
-1.86 C
1934
2.3 C
+1.45 C
1938
1.5 C
+0.69 C
1939
0.7 C
-0.13 C
1940
0.8 C
-0.01 C
1941
2.2 C
+1.33 C
1942
0.5 C
-0.33 C
1943
1.4 C
+0.53 C
1944
2.0 C
+1.12 C
1945
-0.6 C
-1.39 C
1946
0.8 C
-0.02 C
1950
-1.7 C
-2.57 C
1951
-1.0 C
-1.87 C
1952
2.0 C
+1.17 C
1956
0.7 C
-0.16 C
1959
0.8 C
-0.07 C
1960
1.4 C
+0.53 C
The fitted trend in annual mean temperature here over 1920 to 1960 is -0.1 C (-0.4 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.8 to 0.5) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Athabasca
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.4 to 0.3) per decade
-0.1 F (-0.8 to 0.5) per decade
1920 to 1960
30
Not clearly different from zero
Mean daily maximum
-0.3 C (-0.7 to 0.2) per decade
-0.5 F (-1.3 to 0.3) per decade
1920 to 1960
30
Not clearly different from zero
Mean daily minimum
0.1 C (-0.2 to 0.5) per decade
0.2 F (-0.3 to 0.8) per decade
1920 to 1960
30
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
1918 to 1967
Yearly extremes at Athabasca: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.3 C (100.9 F)
1941
32.2 C (90.0 F)
46
Coldest night (TNn)
-51.7 C (-61.1 F)
1929
-45.0 C (-49.0 F)
46
Wettest day (Rx1day)
87.9 mm (3.5 in)
1931
34.7 mm (1.4 in)
48
Wettest five days (Rx5day)
131.6 mm (5.2 in)
1931
52.3 mm (2.1 in)
48
Longest dry spell (CDD)
92 days
1929
29 days
48
Hottest day (TXx)
The hottest day of the year at Athabasca, 1918 to 1967. The record is 38.3 C (100.9 F) in 1941, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Athabasca by year
Year
Hottest day (TXx)
1918
35.0 C (95.0 F)
1919
32.8 C (91.0 F)
1920
33.9 C (93.0 F)
1921
29.4 C (84.9 F)
1922
33.3 C (91.9 F)
1923
30.0 C (86.0 F)
1924
37.2 C (99.0 F)
1925
31.7 C (89.1 F)
1926
35.6 C (96.1 F)
1927
32.8 C (91.0 F)
1928
33.3 C (91.9 F)
1929
31.1 C (88.0 F)
1930
32.8 C (91.0 F)
1931
29.4 C (84.9 F)
1932
30.6 C (87.1 F)
1933
31.1 C (88.0 F)
1934
32.8 C (91.0 F)
1935
33.3 C (91.9 F)
1936
n/a
1937
n/a
1938
32.2 C (90.0 F)
1939
32.2 C (90.0 F)
1940
33.3 C (91.9 F)
1941
38.3 C (100.9 F)
1942
33.3 C (91.9 F)
1943
30.6 C (87.1 F)
1944
30.6 C (87.1 F)
1945
33.3 C (91.9 F)
1946
32.8 C (91.0 F)
1947
32.2 C (90.0 F)
1948
31.7 C (89.1 F)
1949
31.7 C (89.1 F)
1950
35.6 C (96.1 F)
1951
32.2 C (90.0 F)
1952
31.7 C (89.1 F)
1953
31.7 C (89.1 F)
1954
32.2 C (90.0 F)
1955
32.2 C (90.0 F)
1956
30.6 C (87.1 F)
1957
30.0 C (86.0 F)
1958
31.7 C (89.1 F)
1959
34.4 C (93.9 F)
1960
33.3 C (91.9 F)
1961
33.9 C (93.0 F)
1962
30.0 C (86.0 F)
1965
32.2 C (90.0 F)
1966
31.1 C (88.0 F)
1967
15.0 C (59.0 F)
Coldest night (TNn)
The coldest night of the year at Athabasca, 1918 to 1967. The record is -51.7 C (-61.1 F) in 1929, marked on the chart; the median year is -45.0 C (-49.0 F).
Coldest night (TNn) at Athabasca by year
Year
Coldest night (TNn)
1918
-28.3 C (-18.9 F)
1919
-46.7 C (-52.1 F)
1920
-49.4 C (-56.9 F)
1921
-41.1 C (-42.0 F)
1922
-46.7 C (-52.1 F)
1923
-47.8 C (-54.0 F)
1924
-49.4 C (-56.9 F)
1925
-48.3 C (-54.9 F)
1926
-42.2 C (-44.0 F)
1927
-45.0 C (-49.0 F)
1928
-46.1 C (-51.0 F)
1929
-51.7 C (-61.1 F)
1930
-45.6 C (-50.1 F)
1931
-36.1 C (-33.0 F)
1932
-46.1 C (-51.0 F)
1933
-45.0 C (-49.0 F)
1934
-44.4 C (-47.9 F)
1935
-49.4 C (-56.9 F)
1936
n/a
1937
n/a
1938
-46.7 C (-52.1 F)
1939
-47.8 C (-54.0 F)
1940
-38.3 C (-36.9 F)
1941
-48.3 C (-54.9 F)
1942
-43.3 C (-45.9 F)
1943
-47.2 C (-53.0 F)
1944
-43.3 C (-45.9 F)
1945
-45.6 C (-50.1 F)
1946
-45.6 C (-50.1 F)
1947
-42.8 C (-45.0 F)
1948
-42.8 C (-45.0 F)
1949
-45.6 C (-50.1 F)
1950
-50.6 C (-59.1 F)
1951
-43.3 C (-45.9 F)
1952
-43.9 C (-47.0 F)
1953
-48.3 C (-54.9 F)
1954
-48.9 C (-56.0 F)
1955
-41.7 C (-43.1 F)
1956
-41.7 C (-43.1 F)
1957
-43.3 C (-45.9 F)
1958
-39.4 C (-38.9 F)
1959
-43.9 C (-47.0 F)
1960
-38.9 C (-38.0 F)
1961
-40.0 C (-40.0 F)
1962
-48.3 C (-54.9 F)
1965
-30.0 C (-22.0 F)
1966
-35.6 C (-32.1 F)
1967
-20.6 C (-5.1 F)
Wettest day (Rx1day)
The wettest day of the year at Athabasca, 1918 to 1967. The record is 87.9 mm (3.5 in) in 1931, marked on the chart; the median year is 34.7 mm (1.4 in).
Wettest day (Rx1day) at Athabasca by year
Year
Wettest day (Rx1day)
1918
39.1 mm (1.5 in)
1919
38.1 mm (1.5 in)
1920
53.3 mm (2.1 in)
1921
20.3 mm (0.8 in)
1922
24.6 mm (1.0 in)
1923
30.7 mm (1.2 in)
1924
42.7 mm (1.7 in)
1925
24.4 mm (1.0 in)
1926
36.8 mm (1.4 in)
1927
55.4 mm (2.2 in)
1928
33.5 mm (1.3 in)
1929
30.5 mm (1.2 in)
1930
45.7 mm (1.8 in)
1931
87.9 mm (3.5 in)
1932
30.5 mm (1.2 in)
1933
39.4 mm (1.6 in)
1934
47.2 mm (1.9 in)
1935
37.6 mm (1.5 in)
1936
37.8 mm (1.5 in)
1937
35.6 mm (1.4 in)
1938
19.6 mm (0.8 in)
1939
38.1 mm (1.5 in)
1940
21.6 mm (0.9 in)
1941
44.5 mm (1.8 in)
1942
27.7 mm (1.1 in)
1943
43.2 mm (1.7 in)
1944
55.4 mm (2.2 in)
1945
25.7 mm (1.0 in)
1946
35.6 mm (1.4 in)
1947
25.4 mm (1.0 in)
1948
23.6 mm (0.9 in)
1949
29.2 mm (1.1 in)
1950
24.1 mm (0.9 in)
1951
27.9 mm (1.1 in)
1952
24.6 mm (1.0 in)
1953
41.9 mm (1.6 in)
1954
74.9 mm (2.9 in)
1955
47.2 mm (1.9 in)
1956
34.3 mm (1.4 in)
1957
35.1 mm (1.4 in)
1958
28.7 mm (1.1 in)
1959
22.9 mm (0.9 in)
1960
31.2 mm (1.2 in)
1961
36.8 mm (1.4 in)
1962
26.7 mm (1.1 in)
1965
38.6 mm (1.5 in)
1966
25.4 mm (1.0 in)
1967
15.2 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Athabasca, 1918 to 1967. The record is 131.6 mm (5.2 in) in 1931, marked on the chart; the median year is 52.3 mm (2.1 in).
Wettest five days (Rx5day) at Athabasca by year
Year
Wettest five days (Rx5day)
1918
40.9 mm (1.6 in)
1919
44.9 mm (1.8 in)
1920
80.0 mm (3.1 in)
1921
44.8 mm (1.8 in)
1922
27.2 mm (1.1 in)
1923
63.2 mm (2.5 in)
1924
42.7 mm (1.7 in)
1925
42.3 mm (1.7 in)
1926
45.4 mm (1.8 in)
1927
60.5 mm (2.4 in)
1928
38.6 mm (1.5 in)
1929
35.6 mm (1.4 in)
1930
54.9 mm (2.2 in)
1931
131.6 mm (5.2 in)
1932
58.4 mm (2.3 in)
1933
71.2 mm (2.8 in)
1934
51.5 mm (2.0 in)
1935
52.4 mm (2.1 in)
1936
39.6 mm (1.6 in)
1937
68.1 mm (2.7 in)
1938
32.6 mm (1.3 in)
1939
70.7 mm (2.8 in)
1940
37.6 mm (1.5 in)
1941
46.8 mm (1.8 in)
1942
40.9 mm (1.6 in)
1943
73.2 mm (2.9 in)
1944
87.4 mm (3.4 in)
1945
68.6 mm (2.7 in)
1946
66.0 mm (2.6 in)
1947
34.0 mm (1.3 in)
1948
36.1 mm (1.4 in)
1949
57.4 mm (2.3 in)
1950
27.0 mm (1.1 in)
1951
52.1 mm (2.1 in)
1952
28.6 mm (1.1 in)
1953
89.6 mm (3.5 in)
1954
100.3 mm (3.9 in)
1955
89.0 mm (3.5 in)
1956
49.8 mm (2.0 in)
1957
56.4 mm (2.2 in)
1958
29.0 mm (1.1 in)
1959
51.6 mm (2.0 in)
1960
62.5 mm (2.5 in)
1961
70.3 mm (2.8 in)
1962
55.5 mm (2.2 in)
1965
79.0 mm (3.1 in)
1966
66.6 mm (2.6 in)
1967
25.3 mm (1.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Athabasca, 1918 to 1967. The record is 92 days in 1929, marked on the chart; the median year is 29 days.
Longest dry spell (CDD) at Athabasca by year
Year
Longest dry spell (CDD)
1918
22 days
1919
24 days
1920
26 days
1921
25 days
1922
28 days
1923
29 days
1924
26 days
1925
19 days
1926
41 days
1927
18 days
1928
44 days
1929
92 days
1930
47 days
1931
44 days
1932
28 days
1933
28 days
1934
39 days
1935
37 days
1936
22 days
1937
26 days
1938
45 days
1939
20 days
1940
27 days
1941
49 days
1942
32 days
1943
21 days
1944
31 days
1945
49 days
1946
22 days
1947
24 days
1948
41 days
1949
20 days
1950
42 days
1951
29 days
1952
36 days
1953
35 days
1954
56 days
1955
26 days
1956
32 days
1957
44 days
1958
28 days
1959
23 days
1960
41 days
1961
29 days
1962
9 days
1965
26 days
1966
30 days
1967
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
30 years with a frost
Across 30 years with a frost, the median last spring frost at Athabasca falls on 16 June and the median first autumn frost on 18 August, which leaves a median of 60 days between them.
Fitted over all years, the growing season changes by +0.9 days per decade at this station.
Frost dates and growing season at Athabasca
Measure
Median, all years
Earliest period
Recent period (1920 to 1960)
Recent against earliest
Fitted trend
Last spring frost
16 June
n/a
16 June
n/a
+1.4 days per decade
First autumn frost
18 August
n/a
18 August
n/a
+2.3 days per decade
Growing days
60 days
n/a
60 days
n/a
+0.9 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
37 years, 1919 to 1960
A day with at least 33.6 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 92.2 mm (3.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Athabasca: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
33.6 mm (1.3 in)
5 years
45.8 mm (1.8 in)
10 years
55.1 mm (2.2 in)
25 years
68.5 mm (2.7 in)
50 years
79.7 mm (3.1 in)
Longer than the 37 years of record
100 years
92.2 mm (3.6 in)
Longer than the 37 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, 37 years of values from 1919 to 1960.
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: 87.9 mm (3.5 in) in 1931; 74.9 mm (2.9 in) in 1954; 55.4 mm (2.2 in) in 1927.
Download the Data
Data for Athabasca standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Athabasca 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.