Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Jasper. 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 Jasper, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.3 C (55.9 F)
-46.7 C (-52.1 F)
n/a
n/a
Feb
15.0 C (59.0 F)
-43.3 C (-45.9 F)
n/a
n/a
Mar
20.0 C (68.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Apr
26.5 C (79.7 F)
-28.9 C (-20.0 F)
n/a
n/a
May
30.4 C (86.7 F)
-13.9 C (7.0 F)
n/a
n/a
Jun
32.8 C (91.0 F)
-6.7 C (19.9 F)
n/a
n/a
Jul
36.7 C (98.1 F)
-1.7 C (28.9 F)
n/a
n/a
Aug
35.0 C (95.0 F)
-2.8 C (27.0 F)
n/a
n/a
Sep
32.4 C (90.3 F)
-11.1 C (12.0 F)
n/a
n/a
Oct
27.2 C (81.0 F)
-21.7 C (-7.1 F)
n/a
n/a
Nov
16.7 C (62.1 F)
-36.1 C (-33.0 F)
n/a
n/a
Dec
15.0 C (59.0 F)
-42.2 C (-44.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Jasper still stand. 1939 holds the most, with 73.
Standing records at Jasper by the year they were set
Year set
Standing records
1926
13
1927
13
1928
9
1929
2
1930
20
1931
16
1932
37
1933
20
1934
12
1935
32
1936
26
1938
22
1939
73
1940
23
1941
33
1942
22
1943
44
1944
27
1945
22
1946
21
1947
33
1948
16
1949
35
1950
44
1951
52
1952
23
1953
18
1954
46
1955
50
1956
37
1957
40
1958
26
1959
23
1960
21
1961
30
1962
21
1963
29
1964
25
1965
31
1966
24
1967
20
1968
29
1969
19
1970
23
1971
24
1972
29
1973
22
1974
11
1975
23
1976
11
1977
21
1978
10
1979
15
1980
30
1981
34
1982
11
1983
21
All-Time Record Progression
2 new records
2 all-time records were set at Jasper between 5 August 1969 and 12 July 1975. Each dot is a new record.
When Jasper set new all-time records
Date
Kind
Detail
1969-08-05
Record daily precipitation
Record daily precipitation 107.7 mm (4.2 in)
1975-07-12
Record high minimum temperature
Record high minimum temperature 17.2 C (63.0 F)
Wettest Day of Each Month
Aug: 107.7 mm (4.2 in)
The wettest day on record for each calendar month at Jasper. The most was 107.7 mm (4.2 in) on 5 August 1969.
Record daily precipitation for each month at Jasper
Month
Record daily precipitation (mm)
Date
Jan
30.5 mm (1.2 in)
4 January 1936
Feb
30.7 mm (1.2 in)
24 February 1957
Mar
18.3 mm (0.7 in)
26 March 1946
Apr
19.8 mm (0.8 in)
11 April 1966
May
70.4 mm (2.8 in)
22 May 1944
Jun
36.8 mm (1.4 in)
9 June 1971
Jul
86.6 mm (3.4 in)
1 July 1935
Aug
107.7 mm (4.2 in)
5 August 1969
Sep
33.0 mm (1.3 in)
19 September 1960
Oct
29.7 mm (1.2 in)
16 October 1926
Nov
22.1 mm (0.9 in)
3 November 1955
Dec
31.5 mm (1.2 in)
25 December 1938
Period of Record Coverage
1926 to 1983
Complete yearUnder 90 percent of days
57 years of record at Jasper, 1926 to 1983. 10 years have data for under 90 percent of days and are left out of rankings: 1926, 1927, 1928, 1929, 1930, 1931, 1933, 1934 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 47 complete years at Jasper, 1932 to 1983. Blue stripes are years cooler than the station's own mean of 2.9 C (37.2 F); red stripes are warmer. The coolest year was 1951, at 0.6 C (33.1 F), and the warmest was 1941, at 5.1 C (41.2 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Jasper as warming stripes, 1932 to 1983
Year
Annual mean temperature
Difference from the station mean
1932
2.7 C
-0.24 C
1936
1.9 C
-1.04 C
1938
3.7 C
+0.81 C
1939
4.9 C
+1.98 C
1941
5.1 C
+2.24 C
1942
3.3 C
+0.38 C
1943
3.3 C
+0.40 C
1944
3.8 C
+0.89 C
1945
2.9 C
+0.02 C
1946
3.6 C
+0.70 C
1947
3.6 C
+0.68 C
1948
2.0 C
-0.85 C
1949
2.0 C
-0.91 C
1950
0.7 C
-2.19 C
1951
0.6 C
-2.29 C
1952
3.2 C
+0.32 C
1953
3.6 C
+0.70 C
1954
1.9 C
-0.96 C
1955
0.9 C
-1.96 C
1956
2.4 C
-0.51 C
1957
2.4 C
-0.50 C
1958
4.2 C
+1.33 C
1959
2.4 C
-0.50 C
1960
3.3 C
+0.36 C
1961
3.9 C
+1.03 C
1962
3.3 C
+0.38 C
1963
3.8 C
+0.92 C
1964
2.3 C
-0.56 C
1965
2.3 C
-0.55 C
1966
2.5 C
-0.38 C
1967
3.7 C
+0.79 C
1968
2.7 C
-0.16 C
1969
2.6 C
-0.29 C
1970
2.9 C
-0.02 C
1971
2.7 C
-0.19 C
1972
1.5 C
-1.41 C
1973
2.7 C
-0.19 C
1974
3.2 C
+0.33 C
1975
2.1 C
-0.80 C
1976
3.8 C
+0.89 C
1977
3.0 C
+0.10 C
1978
2.8 C
-0.07 C
1979
2.5 C
-0.35 C
1980
3.4 C
+0.46 C
1981
4.8 C
+1.92 C
1982
1.5 C
-1.41 C
1983
3.5 C
+0.63 C
The fitted trend in annual mean temperature here over 1932 to 1983 is -0.04 C (-0.25 to 0.18) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.5 to 0.3) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Jasper
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.04 C (-0.25 to 0.18) per decade
-0.1 F (-0.5 to 0.3) per decade
1932 to 1983
47
Not clearly different from zero
Mean daily maximum
-0.20 C (-0.43 to 0.03) per decade
-0.37 F (-0.78 to 0.05) per decade
1932 to 1983
47
Not clearly different from zero
Mean daily minimum
0.1 C (-0.1 to 0.3) per decade
0.2 F (-0.1 to 0.6) per decade
1932 to 1983
47
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
1926 to 1983
Yearly extremes at Jasper: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.7 C (98.1 F)
1941
31.7 C (89.1 F)
57
Coldest night (TNn)
-46.7 C (-52.1 F)
1935
-36.1 C (-33.0 F)
57
Wettest day (Rx1day)
107.7 mm (4.2 in)
1969
23.9 mm (0.9 in)
57
Wettest five days (Rx5day)
142.8 mm (5.6 in)
1935
37.7 mm (1.5 in)
57
Longest dry spell (CDD)
56 days
1933
22 days
57
Hottest day (TXx)
The hottest day of the year at Jasper, 1926 to 1983. The record is 36.7 C (98.1 F) in 1941, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Jasper by year
Year
Hottest day (TXx)
1926
26.7 C (80.1 F)
1927
32.2 C (90.0 F)
1928
29.4 C (84.9 F)
1929
29.4 C (84.9 F)
1930
30.0 C (86.0 F)
1931
30.0 C (86.0 F)
1932
30.6 C (87.1 F)
1933
32.2 C (90.0 F)
1934
29.4 C (84.9 F)
1935
32.2 C (90.0 F)
1936
32.2 C (90.0 F)
1938
31.1 C (88.0 F)
1939
33.3 C (91.9 F)
1940
33.9 C (93.0 F)
1941
36.7 C (98.1 F)
1942
32.8 C (91.0 F)
1943
29.4 C (84.9 F)
1944
33.3 C (91.9 F)
1945
32.8 C (91.0 F)
1946
32.8 C (91.0 F)
1947
30.6 C (87.1 F)
1948
30.0 C (86.0 F)
1949
32.8 C (91.0 F)
1950
31.1 C (88.0 F)
1951
30.6 C (87.1 F)
1952
30.6 C (87.1 F)
1953
31.1 C (88.0 F)
1954
28.9 C (84.0 F)
1955
32.8 C (91.0 F)
1956
33.3 C (91.9 F)
1957
28.9 C (84.0 F)
1958
31.7 C (89.1 F)
1959
34.4 C (93.9 F)
1960
33.9 C (93.0 F)
1961
33.9 C (93.0 F)
1962
31.1 C (88.0 F)
1963
30.6 C (87.1 F)
1964
34.4 C (93.9 F)
1965
32.8 C (91.0 F)
1966
32.2 C (90.0 F)
1967
32.8 C (91.0 F)
1968
30.6 C (87.1 F)
1969
32.8 C (91.0 F)
1970
32.2 C (90.0 F)
1971
35.0 C (95.0 F)
1972
30.6 C (87.1 F)
1973
31.7 C (89.1 F)
1974
32.8 C (91.0 F)
1975
33.9 C (93.0 F)
1976
28.3 C (82.9 F)
1977
30.1 C (86.2 F)
1978
31.2 C (88.2 F)
1979
34.5 C (94.1 F)
1980
27.7 C (81.9 F)
1981
32.8 C (91.0 F)
1982
30.2 C (86.4 F)
1983
30.4 C (86.7 F)
Coldest night (TNn)
The coldest night of the year at Jasper, 1926 to 1983. The record is -46.7 C (-52.1 F) in 1935, marked on the chart; the median year is -36.1 C (-33.0 F).
Coldest night (TNn) at Jasper by year
Year
Coldest night (TNn)
1926
-35.6 C (-32.1 F)
1927
-33.9 C (-29.0 F)
1928
-15.0 C (5.0 F)
1929
0.0 C (32.0 F)
1930
-21.1 C (-6.0 F)
1931
-27.8 C (-18.0 F)
1932
-36.7 C (-34.1 F)
1933
-37.2 C (-35.0 F)
1934
-37.8 C (-36.0 F)
1935
-46.7 C (-52.1 F)
1936
-36.7 C (-34.1 F)
1938
-35.6 C (-32.1 F)
1939
-42.2 C (-44.0 F)
1940
-27.8 C (-18.0 F)
1941
-31.7 C (-25.1 F)
1942
-30.0 C (-22.0 F)
1943
-44.4 C (-47.9 F)
1944
-34.4 C (-29.9 F)
1945
-31.1 C (-24.0 F)
1946
-32.2 C (-26.0 F)
1947
-41.1 C (-42.0 F)
1948
-36.1 C (-33.0 F)
1949
-37.2 C (-35.0 F)
1950
-46.1 C (-51.0 F)
1951
-42.2 C (-44.0 F)
1952
-35.6 C (-32.1 F)
1953
-40.6 C (-41.1 F)
1954
-42.8 C (-45.0 F)
1955
-42.2 C (-44.0 F)
1956
-43.3 C (-45.9 F)
1957
-42.8 C (-45.0 F)
1958
-32.8 C (-27.0 F)
1959
-36.1 C (-33.0 F)
1960
-32.8 C (-27.0 F)
1961
-33.9 C (-29.0 F)
1962
-35.6 C (-32.1 F)
1963
-37.8 C (-36.0 F)
1964
-38.3 C (-36.9 F)
1965
-39.4 C (-38.9 F)
1966
-33.3 C (-27.9 F)
1967
-30.6 C (-23.1 F)
1968
-39.4 C (-38.9 F)
1969
-40.0 C (-40.0 F)
1970
-39.4 C (-38.9 F)
1971
-38.3 C (-36.9 F)
1972
-44.4 C (-47.9 F)
1973
-33.9 C (-29.0 F)
1974
-35.6 C (-32.1 F)
1975
-37.2 C (-35.0 F)
1976
-32.8 C (-27.0 F)
1977
-38.5 C (-37.3 F)
1978
-35.0 C (-31.0 F)
1979
-36.5 C (-33.7 F)
1980
-34.0 C (-29.2 F)
1981
-31.2 C (-24.2 F)
1982
-36.2 C (-33.2 F)
1983
-35.4 C (-31.7 F)
Wettest day (Rx1day)
The wettest day of the year at Jasper, 1926 to 1983. The record is 107.7 mm (4.2 in) in 1969, marked on the chart; the median year is 23.9 mm (0.9 in).
Wettest day (Rx1day) at Jasper by year
Year
Wettest day (Rx1day)
1926
29.7 mm (1.2 in)
1927
18.3 mm (0.7 in)
1928
15.7 mm (0.6 in)
1929
6.4 mm (0.25 in)
1930
19.1 mm (0.8 in)
1931
19.3 mm (0.8 in)
1932
29.7 mm (1.2 in)
1933
31.8 mm (1.3 in)
1934
16.5 mm (0.6 in)
1935
86.6 mm (3.4 in)
1936
30.5 mm (1.2 in)
1938
31.5 mm (1.2 in)
1939
20.8 mm (0.8 in)
1940
11.4 mm (0.4 in)
1941
11.9 mm (0.5 in)
1942
14.0 mm (0.6 in)
1943
9.7 mm (0.38 in)
1944
70.4 mm (2.8 in)
1945
16.3 mm (0.6 in)
1946
20.8 mm (0.8 in)
1947
29.2 mm (1.1 in)
1948
21.1 mm (0.8 in)
1949
30.5 mm (1.2 in)
1950
30.7 mm (1.2 in)
1951
16.5 mm (0.6 in)
1952
24.9 mm (1.0 in)
1953
26.4 mm (1.0 in)
1954
32.8 mm (1.3 in)
1955
35.3 mm (1.4 in)
1956
20.3 mm (0.8 in)
1957
30.7 mm (1.2 in)
1958
28.2 mm (1.1 in)
1959
20.6 mm (0.8 in)
1960
33.0 mm (1.3 in)
1961
25.9 mm (1.0 in)
1962
22.1 mm (0.9 in)
1963
21.1 mm (0.8 in)
1964
22.9 mm (0.9 in)
1965
23.9 mm (0.9 in)
1966
23.4 mm (0.9 in)
1967
27.7 mm (1.1 in)
1968
27.4 mm (1.1 in)
1969
107.7 mm (4.2 in)
1970
25.9 mm (1.0 in)
1971
36.8 mm (1.4 in)
1972
31.5 mm (1.2 in)
1973
16.8 mm (0.7 in)
1974
27.7 mm (1.1 in)
1975
16.3 mm (0.6 in)
1976
18.0 mm (0.7 in)
1977
28.5 mm (1.1 in)
1978
45.6 mm (1.8 in)
1979
19.0 mm (0.7 in)
1980
19.6 mm (0.8 in)
1981
19.4 mm (0.8 in)
1982
32.8 mm (1.3 in)
1983
22.0 mm (0.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Jasper, 1926 to 1983. The record is 142.8 mm (5.6 in) in 1935, marked on the chart; the median year is 37.7 mm (1.5 in).
Wettest five days (Rx5day) at Jasper by year
Year
Wettest five days (Rx5day)
1926
38.8 mm (1.5 in)
1927
28.9 mm (1.1 in)
1928
25.4 mm (1.0 in)
1929
14.3 mm (0.6 in)
1930
35.4 mm (1.4 in)
1931
34.5 mm (1.4 in)
1932
64.8 mm (2.6 in)
1933
34.1 mm (1.3 in)
1934
32.8 mm (1.3 in)
1935
142.8 mm (5.6 in)
1936
36.9 mm (1.5 in)
1938
41.7 mm (1.6 in)
1939
31.1 mm (1.2 in)
1940
25.2 mm (1.0 in)
1941
19.6 mm (0.8 in)
1942
28.3 mm (1.1 in)
1943
24.5 mm (1.0 in)
1944
92.4 mm (3.6 in)
1945
22.9 mm (0.9 in)
1946
23.4 mm (0.9 in)
1947
37.3 mm (1.5 in)
1948
47.5 mm (1.9 in)
1949
61.8 mm (2.4 in)
1950
62.3 mm (2.5 in)
1951
28.5 mm (1.1 in)
1952
37.7 mm (1.5 in)
1953
79.0 mm (3.1 in)
1954
65.1 mm (2.6 in)
1955
55.7 mm (2.2 in)
1956
39.4 mm (1.6 in)
1957
57.4 mm (2.3 in)
1958
50.1 mm (2.0 in)
1959
40.5 mm (1.6 in)
1960
43.1 mm (1.7 in)
1961
39.8 mm (1.6 in)
1962
33.0 mm (1.3 in)
1963
32.0 mm (1.3 in)
1964
32.2 mm (1.3 in)
1965
52.8 mm (2.1 in)
1966
35.3 mm (1.4 in)
1967
39.7 mm (1.6 in)
1968
39.3 mm (1.5 in)
1969
111.0 mm (4.4 in)
1970
33.5 mm (1.3 in)
1971
69.9 mm (2.8 in)
1972
65.8 mm (2.6 in)
1973
22.6 mm (0.9 in)
1974
47.7 mm (1.9 in)
1975
29.5 mm (1.2 in)
1976
35.0 mm (1.4 in)
1977
34.5 mm (1.4 in)
1978
66.0 mm (2.6 in)
1979
38.8 mm (1.5 in)
1980
30.8 mm (1.2 in)
1981
41.0 mm (1.6 in)
1982
68.6 mm (2.7 in)
1983
35.4 mm (1.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Jasper, 1926 to 1983. The record is 56 days in 1933, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Jasper by year
Year
Longest dry spell (CDD)
1926
22 days
1927
28 days
1928
21 days
1929
8 days
1930
29 days
1931
25 days
1932
23 days
1933
56 days
1934
31 days
1935
38 days
1936
44 days
1938
35 days
1939
35 days
1940
16 days
1941
26 days
1942
33 days
1943
20 days
1944
21 days
1945
22 days
1946
20 days
1947
12 days
1948
25 days
1949
31 days
1950
22 days
1951
35 days
1952
29 days
1953
27 days
1954
18 days
1955
20 days
1956
23 days
1957
38 days
1958
20 days
1959
13 days
1960
24 days
1961
18 days
1962
18 days
1963
30 days
1964
22 days
1965
19 days
1966
27 days
1967
22 days
1968
17 days
1969
21 days
1970
40 days
1971
16 days
1972
17 days
1973
20 days
1974
21 days
1975
23 days
1976
20 days
1977
21 days
1978
39 days
1979
29 days
1980
17 days
1981
29 days
1982
19 days
1983
25 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
47 years with a frost
Across 47 years with a frost, the median last spring frost at Jasper falls on 7 June and the median first autumn frost on 3 September, which leaves a median of 88 days between them.
Fitted over all years, the growing season changes by +8.3 days per decade at this station.
Frost dates and growing season at Jasper
Measure
Median, all years
Earliest period
Recent period (1954 to 1983)
Recent against earliest
Fitted trend
Last spring frost
7 June
n/a
7 June
n/a
-1.4 days per decade
First autumn frost
3 September
n/a
7 September
n/a
+6.9 days per decade
Growing days
88 days
n/a
95 days
n/a
+8.3 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
47 years, 1932 to 1983
A day with at least 24.0 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 81.1 mm (3.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Jasper: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
24.0 mm (0.9 in)
5 years
33.9 mm (1.3 in)
10 years
42.2 mm (1.7 in)
25 years
55.2 mm (2.2 in)
50 years
67.1 mm (2.6 in)
Longer than the 47 years of record
100 years
81.1 mm (3.2 in)
Longer than the 47 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, 47 years of values from 1932 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: 107.7 mm (4.2 in) in 1969; 70.4 mm (2.8 in) in 1944; 45.6 mm (1.8 in) in 1978.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Jasper standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Jasper 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.