Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Barrage Mattawin. 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 Barrage Mattawin, 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)
-43.9 C (-47.0 F)
n/a
n/a
Feb
13.3 C (55.9 F)
-45.0 C (-49.0 F)
n/a
n/a
Mar
20.0 C (68.0 F)
-38.9 C (-38.0 F)
n/a
n/a
Apr
26.1 C (79.0 F)
-29.4 C (-20.9 F)
n/a
n/a
May
31.7 C (89.1 F)
-9.4 C (15.1 F)
n/a
n/a
Jun
33.3 C (91.9 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
34.4 C (93.9 F)
1.1 C (34.0 F)
n/a
n/a
Aug
38.3 C (100.9 F)
-3.9 C (25.0 F)
n/a
n/a
Sep
32.2 C (90.0 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-13.3 C (8.1 F)
n/a
n/a
Nov
27.8 C (82.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Dec
15.0 C (59.0 F)
-40.0 C (-40.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Barrage Mattawin still stand. 1934 holds the most, with 53.
Standing records at Barrage Mattawin by the year they were set
Year set
Standing records
1929
3
1930
27
1931
33
1932
37
1933
50
1934
53
1935
30
1936
37
1937
26
1938
42
1939
27
1940
29
1941
23
1942
30
1943
36
1944
28
1945
45
1946
35
1947
51
1948
28
1949
42
1950
36
1951
31
1952
19
1953
31
1954
21
1955
22
1956
27
1957
37
1958
11
1959
30
1960
15
1961
18
1962
22
1963
16
1964
20
1965
23
1966
30
1967
14
1968
27
1969
20
1970
20
1971
16
1972
22
1973
22
1974
21
1975
22
1976
28
1977
22
1978
25
1979
29
1980
18
1981
26
1982
11
All-Time Record Progression
3 new records
3 all-time records were set at Barrage Mattawin between 1 February 1962 and 1 August 1975. Each dot is a new record.
When Barrage Mattawin set new all-time records
Date
Kind
Detail
1962-02-01
Record low minimum temperature
Record low minimum temperature -45.0 C (-49.0 F)
1975-04-03
Record daily snowfall
Record daily snowfall 61.5 cm (24.2 in)
1975-08-01
Record high maximum temperature
Record high maximum temperature 38.3 C (100.9 F)
Wettest Day of Each Month
Jul: 86.4 mm (3.4 in)
The wettest day on record for each calendar month at Barrage Mattawin. The most was 86.4 mm (3.4 in) on 12 July 1944.
Record daily precipitation for each month at Barrage Mattawin
Month
Record daily precipitation (mm)
Date
Jan
30.5 mm (1.2 in)
30 January 1966
Feb
33.0 mm (1.3 in)
10 February 1970
Mar
35.8 mm (1.4 in)
31 March 1976
Apr
61.5 mm (2.4 in)
3 April 1975
May
45.0 mm (1.8 in)
25 May 1931
Jun
66.5 mm (2.6 in)
21 June 1972
Jul
86.4 mm (3.4 in)
12 July 1944
Aug
56.9 mm (2.2 in)
25 August 1945
Sep
44.5 mm (1.8 in)
6 September 1979
Oct
54.4 mm (2.1 in)
6 October 1932
Nov
51.8 mm (2.0 in)
7 November 1963
Dec
45.7 mm (1.8 in)
12 December 1952
Period of Record Coverage
1929 to 1982
Complete yearUnder 90 percent of days
54 years of record at Barrage Mattawin, 1929 to 1982. 4 years have data for under 90 percent of days and are left out of rankings: 1929, 1930, 1931, 1982.
Cooler than the station meanWarmer than the station mean
One stripe for each of 46 complete years at Barrage Mattawin, 1932 to 1981. Blue stripes are years cooler than the station's own mean of 2.6 C (36.8 F); red stripes are warmer. The coolest year was 1972, at 1.0 C (33.7 F), and the warmest was 1953, at 4.6 C (40.2 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Barrage Mattawin as warming stripes, 1932 to 1981
Year
Annual mean temperature
Difference from the station mean
1932
2.1 C
-0.54 C
1934
2.2 C
-0.43 C
1935
3.0 C
+0.31 C
1936
2.7 C
+0.05 C
1937
4.0 C
+1.32 C
1938
4.5 C
+1.80 C
1939
2.4 C
-0.29 C
1940
1.2 C
-1.42 C
1941
3.1 C
+0.40 C
1942
3.0 C
+0.34 C
1943
1.5 C
-1.13 C
1944
3.0 C
+0.30 C
1945
2.9 C
+0.20 C
1946
3.3 C
+0.62 C
1947
2.9 C
+0.27 C
1948
2.8 C
+0.15 C
1949
4.0 C
+1.33 C
1950
3.0 C
+0.35 C
1951
3.3 C
+0.67 C
1952
3.8 C
+1.19 C
1953
4.6 C
+1.90 C
1954
2.6 C
-0.02 C
1955
3.2 C
+0.54 C
1956
2.2 C
-0.49 C
1957
2.7 C
+0.08 C
1958
1.6 C
-1.01 C
1959
1.6 C
-1.09 C
1960
3.2 C
+0.51 C
1961
3.0 C
+0.33 C
1962
2.0 C
-0.70 C
1963
2.0 C
-0.66 C
1964
2.9 C
+0.27 C
1965
2.1 C
-0.57 C
1966
3.4 C
+0.73 C
1967
2.2 C
-0.41 C
1968
2.5 C
-0.12 C
1969
2.7 C
+0.05 C
1971
1.8 C
-0.88 C
1972
1.0 C
-1.70 C
1974
1.7 C
-0.95 C
1975
2.8 C
+0.18 C
1976
1.4 C
-1.22 C
1977
2.7 C
+0.03 C
1978
1.7 C
-0.98 C
1980
2.1 C
-0.54 C
1981
3.8 C
+1.11 C
The fitted trend in annual mean temperature here over 1932 to 1981 is -0.17 C (-0.34 to 0.01) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.30 F (-0.61 to 0.01) per decade. The slope is a straight line fitted to 46 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Barrage Mattawin
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.17 C (-0.34 to 0.01) per decade
-0.30 F (-0.61 to 0.01) per decade
1932 to 1981
46
Not clearly different from zero
Mean daily maximum
-0.3 C (-0.4 to -0.1) per decade
-0.5 F (-0.8 to -0.1) per decade
1932 to 1981
46
Fall
Mean daily minimum
-0.1 C (-0.3 to 0.2) per decade
-0.1 F (-0.5 to 0.3) per decade
1932 to 1981
46
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
1929 to 1982
Yearly extremes at Barrage Mattawin: 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)
1975
31.7 C (89.1 F)
54
Coldest night (TNn)
-45.0 C (-49.0 F)
1962
-38.9 C (-38.0 F)
54
Wettest day (Rx1day)
86.4 mm (3.4 in)
1944
41.8 mm (1.6 in)
54
Wettest five days (Rx5day)
111.5 mm (4.4 in)
1972
65.6 mm (2.6 in)
54
Longest dry spell (CDD)
36 days
1961
14 days
54
Hottest day (TXx)
The hottest day of the year at Barrage Mattawin, 1929 to 1982. The record is 38.3 C (100.9 F) in 1975, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Barrage Mattawin by year
Year
Hottest day (TXx)
1929
1.1 C (34.0 F)
1930
31.7 C (89.1 F)
1931
32.8 C (91.0 F)
1932
28.9 C (84.0 F)
1933
32.2 C (90.0 F)
1934
34.4 C (93.9 F)
1935
35.6 C (96.1 F)
1936
32.8 C (91.0 F)
1937
31.7 C (89.1 F)
1938
32.2 C (90.0 F)
1939
31.7 C (89.1 F)
1940
30.6 C (87.1 F)
1941
32.2 C (90.0 F)
1942
30.6 C (87.1 F)
1943
31.1 C (88.0 F)
1944
33.3 C (91.9 F)
1945
30.0 C (86.0 F)
1946
32.8 C (91.0 F)
1947
32.8 C (91.0 F)
1948
34.4 C (93.9 F)
1949
33.3 C (91.9 F)
1950
30.6 C (87.1 F)
1951
28.9 C (84.0 F)
1952
32.2 C (90.0 F)
1953
34.4 C (93.9 F)
1954
28.9 C (84.0 F)
1955
33.3 C (91.9 F)
1956
31.7 C (89.1 F)
1957
31.7 C (89.1 F)
1958
29.4 C (84.9 F)
1959
31.7 C (89.1 F)
1960
32.2 C (90.0 F)
1961
30.6 C (87.1 F)
1962
31.7 C (89.1 F)
1963
32.8 C (91.0 F)
1964
30.6 C (87.1 F)
1965
28.9 C (84.0 F)
1966
30.6 C (87.1 F)
1967
31.1 C (88.0 F)
1968
31.7 C (89.1 F)
1969
31.7 C (89.1 F)
1970
30.6 C (87.1 F)
1971
29.4 C (84.9 F)
1972
28.9 C (84.0 F)
1973
30.0 C (86.0 F)
1974
29.4 C (84.9 F)
1975
38.3 C (100.9 F)
1976
31.7 C (89.1 F)
1977
31.1 C (88.0 F)
1978
31.7 C (89.1 F)
1979
30.6 C (87.1 F)
1980
30.0 C (86.0 F)
1981
30.6 C (87.1 F)
1982
32.0 C (89.6 F)
Coldest night (TNn)
The coldest night of the year at Barrage Mattawin, 1929 to 1982. The record is -45.0 C (-49.0 F) in 1962, marked on the chart; the median year is -38.9 C (-38.0 F).
Coldest night (TNn) at Barrage Mattawin by year
Year
Coldest night (TNn)
1929
-34.4 C (-29.9 F)
1930
-36.1 C (-33.0 F)
1931
-26.7 C (-16.1 F)
1932
-37.8 C (-36.0 F)
1933
-40.0 C (-40.0 F)
1934
-41.7 C (-43.1 F)
1935
-37.8 C (-36.0 F)
1936
-36.1 C (-33.0 F)
1937
-36.1 C (-33.0 F)
1938
-38.9 C (-38.0 F)
1939
-37.8 C (-36.0 F)
1940
-35.0 C (-31.0 F)
1941
-38.3 C (-36.9 F)
1942
-43.9 C (-47.0 F)
1943
-42.8 C (-45.0 F)
1944
-38.3 C (-36.9 F)
1945
-38.9 C (-38.0 F)
1946
-37.2 C (-35.0 F)
1947
-41.1 C (-42.0 F)
1948
-40.0 C (-40.0 F)
1949
-37.8 C (-36.0 F)
1950
-37.2 C (-35.0 F)
1951
-43.3 C (-45.9 F)
1952
-41.7 C (-43.1 F)
1953
-33.9 C (-29.0 F)
1954
-43.9 C (-47.0 F)
1955
-42.8 C (-45.0 F)
1956
-36.1 C (-33.0 F)
1957
-43.3 C (-45.9 F)
1958
-38.3 C (-36.9 F)
1959
-40.0 C (-40.0 F)
1960
-38.3 C (-36.9 F)
1961
-38.9 C (-38.0 F)
1962
-45.0 C (-49.0 F)
1963
-40.0 C (-40.0 F)
1964
-37.2 C (-35.0 F)
1965
-37.2 C (-35.0 F)
1966
-41.1 C (-42.0 F)
1967
-42.8 C (-45.0 F)
1968
-38.9 C (-38.0 F)
1969
-32.8 C (-27.0 F)
1970
-41.7 C (-43.1 F)
1971
-42.2 C (-44.0 F)
1972
-44.4 C (-47.9 F)
1973
-42.2 C (-44.0 F)
1974
-42.8 C (-45.0 F)
1975
-40.0 C (-40.0 F)
1976
-40.0 C (-40.0 F)
1977
-37.2 C (-35.0 F)
1978
-36.7 C (-34.1 F)
1979
-40.6 C (-41.1 F)
1980
-36.7 C (-34.1 F)
1981
-38.9 C (-38.0 F)
1982
-38.0 C (-36.4 F)
Wettest day (Rx1day)
The wettest day of the year at Barrage Mattawin, 1929 to 1982. The record is 86.4 mm (3.4 in) in 1944, marked on the chart; the median year is 41.8 mm (1.6 in).
Wettest day (Rx1day) at Barrage Mattawin by year
Year
Wettest day (Rx1day)
1929
16.5 mm (0.6 in)
1930
32.3 mm (1.3 in)
1931
45.0 mm (1.8 in)
1932
54.4 mm (2.1 in)
1933
47.8 mm (1.9 in)
1934
44.2 mm (1.7 in)
1935
55.4 mm (2.2 in)
1936
34.3 mm (1.4 in)
1937
30.5 mm (1.2 in)
1938
45.2 mm (1.8 in)
1939
58.7 mm (2.3 in)
1940
26.4 mm (1.0 in)
1941
63.0 mm (2.5 in)
1942
48.3 mm (1.9 in)
1943
46.7 mm (1.8 in)
1944
86.4 mm (3.4 in)
1945
56.9 mm (2.2 in)
1946
42.4 mm (1.7 in)
1947
38.1 mm (1.5 in)
1948
30.0 mm (1.2 in)
1949
44.2 mm (1.7 in)
1950
36.6 mm (1.4 in)
1951
22.4 mm (0.9 in)
1952
45.7 mm (1.8 in)
1953
36.3 mm (1.4 in)
1954
39.1 mm (1.5 in)
1955
32.5 mm (1.3 in)
1956
35.8 mm (1.4 in)
1957
40.6 mm (1.6 in)
1958
43.2 mm (1.7 in)
1959
47.2 mm (1.9 in)
1960
30.7 mm (1.2 in)
1961
34.3 mm (1.4 in)
1962
52.8 mm (2.1 in)
1963
51.8 mm (2.0 in)
1964
41.7 mm (1.6 in)
1965
41.9 mm (1.6 in)
1966
41.4 mm (1.6 in)
1967
43.7 mm (1.7 in)
1968
33.0 mm (1.3 in)
1969
42.4 mm (1.7 in)
1970
42.9 mm (1.7 in)
1971
35.8 mm (1.4 in)
1972
66.5 mm (2.6 in)
1973
36.6 mm (1.4 in)
1974
31.2 mm (1.2 in)
1975
61.5 mm (2.4 in)
1976
52.1 mm (2.1 in)
1977
32.5 mm (1.3 in)
1978
40.9 mm (1.6 in)
1979
44.5 mm (1.8 in)
1980
35.0 mm (1.4 in)
1981
39.4 mm (1.6 in)
1982
28.0 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Barrage Mattawin, 1929 to 1982. The record is 111.5 mm (4.4 in) in 1972, marked on the chart; the median year is 65.6 mm (2.6 in).
Wettest five days (Rx5day) at Barrage Mattawin by year
Year
Wettest five days (Rx5day)
1929
26.9 mm (1.1 in)
1930
52.1 mm (2.1 in)
1931
71.6 mm (2.8 in)
1932
69.4 mm (2.7 in)
1933
50.8 mm (2.0 in)
1934
61.7 mm (2.4 in)
1935
91.2 mm (3.6 in)
1936
77.0 mm (3.0 in)
1937
39.4 mm (1.6 in)
1938
82.8 mm (3.3 in)
1939
82.0 mm (3.2 in)
1940
64.1 mm (2.5 in)
1941
73.2 mm (2.9 in)
1942
53.8 mm (2.1 in)
1943
67.4 mm (2.7 in)
1944
98.8 mm (3.9 in)
1945
69.9 mm (2.8 in)
1946
83.0 mm (3.3 in)
1947
60.2 mm (2.4 in)
1948
57.2 mm (2.3 in)
1949
60.5 mm (2.4 in)
1950
48.2 mm (1.9 in)
1951
42.6 mm (1.7 in)
1952
79.8 mm (3.1 in)
1953
55.2 mm (2.2 in)
1954
60.2 mm (2.4 in)
1955
51.7 mm (2.0 in)
1956
48.7 mm (1.9 in)
1957
67.2 mm (2.6 in)
1958
55.6 mm (2.2 in)
1959
84.1 mm (3.3 in)
1960
47.6 mm (1.9 in)
1961
64.8 mm (2.6 in)
1962
80.7 mm (3.2 in)
1963
99.4 mm (3.9 in)
1964
55.8 mm (2.2 in)
1965
51.9 mm (2.0 in)
1966
70.9 mm (2.8 in)
1967
75.2 mm (3.0 in)
1968
44.7 mm (1.8 in)
1969
69.9 mm (2.8 in)
1970
62.7 mm (2.5 in)
1971
45.6 mm (1.8 in)
1972
111.5 mm (4.4 in)
1973
77.3 mm (3.0 in)
1974
58.4 mm (2.3 in)
1975
67.3 mm (2.6 in)
1976
71.7 mm (2.8 in)
1977
67.1 mm (2.6 in)
1978
69.6 mm (2.7 in)
1979
66.4 mm (2.6 in)
1980
48.2 mm (1.9 in)
1981
88.2 mm (3.5 in)
1982
30.0 mm (1.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Barrage Mattawin, 1929 to 1982. The record is 36 days in 1961, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Barrage Mattawin by year
Year
Longest dry spell (CDD)
1929
9 days
1930
15 days
1931
16 days
1932
16 days
1933
15 days
1934
10 days
1935
13 days
1936
9 days
1937
10 days
1938
17 days
1939
21 days
1940
18 days
1941
25 days
1942
18 days
1943
13 days
1944
14 days
1945
17 days
1946
10 days
1947
19 days
1948
16 days
1949
14 days
1950
11 days
1951
11 days
1952
10 days
1953
19 days
1954
10 days
1955
12 days
1956
13 days
1957
16 days
1958
21 days
1959
11 days
1960
14 days
1961
36 days
1962
24 days
1963
13 days
1964
10 days
1965
27 days
1966
15 days
1967
15 days
1968
13 days
1969
14 days
1970
11 days
1971
12 days
1972
11 days
1973
10 days
1974
11 days
1975
17 days
1976
15 days
1977
18 days
1978
16 days
1979
16 days
1980
26 days
1981
10 days
1982
13 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
46 years with a frost
Across 46 years with a frost, the median last spring frost at Barrage Mattawin falls on 3 June and the median first autumn frost on 16 September, which leaves a median of 106 days between them.
Fitted over all years, the growing season changes by +2.0 days per decade at this station.
Frost dates and growing season at Barrage Mattawin
Measure
Median, all years
Earliest period
Recent period (1949 to 1981)
Recent against earliest
Fitted trend
Last spring frost
3 June
n/a
1 June
n/a
-1.0 days per decade
First autumn frost
16 September
n/a
17 September
n/a
+0.9 days per decade
Growing days
106 days
n/a
106 days
n/a
+2.0 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
51 years, 1931 to 1981
A day with at least 41.5 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 78.7 mm (3.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Barrage Mattawin: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
41.5 mm (1.6 in)
5 years
51.4 mm (2.0 in)
10 years
58.0 mm (2.3 in)
25 years
66.3 mm (2.6 in)
50 years
72.5 mm (2.9 in)
100 years
78.7 mm (3.1 in)
Longer than the 51 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, 51 years of values from 1931 to 1981.
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: 86.4 mm (3.4 in) in 1944; 66.5 mm (2.6 in) in 1972; 63.0 mm (2.5 in) in 1941.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Barrage Mattawin standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Barrage Mattawin 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.