Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Boissevain. 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 Boissevain, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.2 C (54.0 F)
-43.9 C (-47.0 F)
n/a
n/a
Feb
8.0 C (46.4 F)
-37.8 C (-36.0 F)
n/a
n/a
Mar
21.7 C (71.1 F)
-34.4 C (-29.9 F)
n/a
n/a
Apr
35.0 C (95.0 F)
-24.4 C (-11.9 F)
n/a
n/a
May
36.0 C (96.8 F)
-11.7 C (10.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
42.2 C (108.0 F)
2.2 C (36.0 F)
n/a
n/a
Aug
36.7 C (98.1 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-8.3 C (17.1 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-17.8 C (0.0 F)
n/a
n/a
Nov
22.2 C (72.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Dec
12.8 C (55.0 F)
-42.8 C (-45.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Boissevain still stand. 1966 holds the most, with 67.
Standing records at Boissevain by the year they were set
Year set
Standing records
1912
21
1913
18
1914
20
1918
17
1919
5
1922
9
1930
16
1934
19
1935
23
1936
39
1937
16
1938
11
1939
22
1940
15
1941
15
1942
30
1943
43
1944
21
1945
47
1946
47
1947
26
1948
23
1949
33
1950
38
1951
49
1952
24
1953
21
1954
26
1955
14
1956
17
1957
11
1958
19
1959
24
1960
6
1961
12
1962
11
1963
21
1964
53
1965
28
1966
67
1967
30
1968
24
1969
17
1970
17
1971
21
1972
53
1973
52
1974
22
1975
33
1976
36
1977
50
1978
23
1979
36
1980
44
1981
29
All-Time Record Progression
5 new records
5 all-time records were set at Boissevain between 27 January 1966 and 30 July 1975. Each dot is a new record.
When Boissevain set new all-time records
Date
Kind
Detail
1966-01-27
Record low maximum temperature
Record low maximum temperature -32.2 C (-26.0 F)
1966-01-28
Record low maximum temperature
Record low maximum temperature -33.3 C (-27.9 F)
1967-12-31
Record low minimum temperature
Record low minimum temperature -42.8 C (-45.0 F)
1968-01-04
Record low minimum temperature
Record low minimum temperature -43.9 C (-47.0 F)
1975-07-30
Record high minimum temperature
Record high minimum temperature 25.6 C (78.1 F)
Wettest Day of Each Month
Aug: 146.1 mm (5.8 in)
The wettest day on record for each calendar month at Boissevain. The most was 146.1 mm (5.8 in) on 11 August 1957.
Record daily precipitation for each month at Boissevain
Month
Record daily precipitation (mm)
Date
Jan
20.3 mm (0.8 in)
6 January 1966
Feb
20.8 mm (0.8 in)
27 February 1974
Mar
49.3 mm (1.9 in)
26 March 1945
Apr
41.1 mm (1.6 in)
27 April 1975
May
107.4 mm (4.2 in)
25 May 1960
Jun
77.5 mm (3.1 in)
14 June 1962
Jul
75.9 mm (3.0 in)
10 July 1977
Aug
146.1 mm (5.8 in)
11 August 1957
Sep
46.5 mm (1.8 in)
18 September 1975
Oct
38.6 mm (1.5 in)
5 October 1937
Nov
25.4 mm (1.0 in)
26 November 1948
Dec
25.4 mm (1.0 in)
17 December 1977
Period of Record Coverage
1912 to 1981
Complete yearUnder 90 percent of days
55 years of record at Boissevain, 1912 to 1981. 32 years have data for under 90 percent of days and are left out of rankings: 1912, 1913, 1914, 1918, 1919, 1922, 1930, 1934 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 20 complete years at Boissevain, 1943 to 1980. Blue stripes are years cooler than the station's own mean of 2.3 C (36.1 F); red stripes are warmer. The coolest year was 1950, at 0.2 C (32.3 F), and the warmest was 1977, at 4.1 C (39.3 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Boissevain as warming stripes, 1943 to 1980
Year
Annual mean temperature
Difference from the station mean
1943
2.2 C
-0.11 C
1945
1.4 C
-0.90 C
1946
2.6 C
+0.29 C
1947
2.4 C
+0.09 C
1950
0.2 C
-2.09 C
1951
0.9 C
-1.32 C
1964
2.5 C
+0.22 C
1965
1.2 C
-1.02 C
1966
1.3 C
-0.95 C
1967
2.0 C
-0.26 C
1970
2.0 C
-0.30 C
1971
2.7 C
+0.44 C
1972
1.5 C
-0.80 C
1973
3.8 C
+1.50 C
1975
3.0 C
+0.71 C
1976
3.8 C
+1.52 C
1977
4.1 C
+1.79 C
1978
2.6 C
+0.31 C
1979
1.8 C
-0.44 C
1980
3.6 C
+1.38 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1912 to 1981
Yearly extremes at Boissevain: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1936
35.0 C (95.0 F)
55
Coldest night (TNn)
-43.9 C (-47.0 F)
1968
-31.7 C (-25.1 F)
55
Wettest day (Rx1day)
146.1 mm (5.8 in)
1957
40.4 mm (1.6 in)
55
Wettest five days (Rx5day)
267.1 mm (10.5 in)
1957
62.0 mm (2.4 in)
55
Longest dry spell (CDD)
83 days
1980
24 days
55
Hottest day (TXx)
The hottest day of the year at Boissevain, 1912 to 1981. The record is 42.2 C (108.0 F) in 1936, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Boissevain by year
Year
Hottest day (TXx)
1912
36.7 C (98.1 F)
1913
35.6 C (96.1 F)
1914
37.8 C (100.0 F)
1918
37.8 C (100.0 F)
1919
36.1 C (97.0 F)
1922
37.8 C (100.0 F)
1930
37.2 C (99.0 F)
1934
35.6 C (96.1 F)
1935
33.9 C (93.0 F)
1936
42.2 C (108.0 F)
1937
35.6 C (96.1 F)
1938
32.8 C (91.0 F)
1939
34.4 C (93.9 F)
1940
32.8 C (91.0 F)
1941
34.4 C (93.9 F)
1942
33.9 C (93.0 F)
1943
31.1 C (88.0 F)
1944
31.7 C (89.1 F)
1945
33.3 C (91.9 F)
1946
35.6 C (96.1 F)
1947
35.0 C (95.0 F)
1948
32.8 C (91.0 F)
1949
36.7 C (98.1 F)
1950
31.1 C (88.0 F)
1951
36.1 C (97.0 F)
1952
31.1 C (88.0 F)
1953
32.2 C (90.0 F)
1954
31.7 C (89.1 F)
1955
35.0 C (95.0 F)
1956
35.0 C (95.0 F)
1957
35.6 C (96.1 F)
1958
35.0 C (95.0 F)
1959
35.0 C (95.0 F)
1960
35.6 C (96.1 F)
1961
36.1 C (97.0 F)
1962
32.8 C (91.0 F)
1963
35.0 C (95.0 F)
1964
33.3 C (91.9 F)
1965
33.3 C (91.9 F)
1966
35.0 C (95.0 F)
1967
34.4 C (93.9 F)
1968
33.9 C (93.0 F)
1969
33.9 C (93.0 F)
1970
35.0 C (95.0 F)
1971
35.6 C (96.1 F)
1972
35.0 C (95.0 F)
1973
32.8 C (91.0 F)
1974
35.0 C (95.0 F)
1975
36.7 C (98.1 F)
1976
37.2 C (99.0 F)
1977
35.0 C (95.0 F)
1978
37.2 C (99.0 F)
1979
36.0 C (96.8 F)
1980
36.0 C (96.8 F)
1981
15.5 C (59.9 F)
Coldest night (TNn)
The coldest night of the year at Boissevain, 1912 to 1981. The record is -43.9 C (-47.0 F) in 1968, marked on the chart; the median year is -31.7 C (-25.1 F).
Coldest night (TNn) at Boissevain by year
Year
Coldest night (TNn)
1912
-7.8 C (18.0 F)
1913
-15.0 C (5.0 F)
1914
-14.4 C (6.1 F)
1918
-10.6 C (12.9 F)
1919
-1.1 C (30.0 F)
1922
-9.4 C (15.1 F)
1930
-3.9 C (25.0 F)
1934
-9.4 C (15.1 F)
1935
-13.3 C (8.1 F)
1936
-22.2 C (-8.0 F)
1937
-10.0 C (14.0 F)
1938
-12.8 C (9.0 F)
1939
-16.1 C (3.0 F)
1940
-16.1 C (3.0 F)
1941
-13.3 C (8.1 F)
1942
-28.9 C (-20.0 F)
1943
-41.7 C (-43.1 F)
1944
-32.8 C (-27.0 F)
1945
-32.8 C (-27.0 F)
1946
-33.3 C (-27.9 F)
1947
-34.4 C (-29.9 F)
1948
-35.6 C (-32.1 F)
1949
-31.7 C (-25.1 F)
1950
-37.8 C (-36.0 F)
1951
-37.8 C (-36.0 F)
1952
-33.3 C (-27.9 F)
1953
-14.4 C (6.1 F)
1954
-23.3 C (-9.9 F)
1955
-8.3 C (17.1 F)
1956
-28.3 C (-18.9 F)
1957
-15.6 C (3.9 F)
1958
-12.2 C (10.0 F)
1959
-8.9 C (16.0 F)
1960
-10.6 C (12.9 F)
1961
-6.7 C (19.9 F)
1962
-14.4 C (6.1 F)
1963
-23.9 C (-11.0 F)
1964
-31.7 C (-25.1 F)
1965
-34.4 C (-29.9 F)
1966
-40.0 C (-40.0 F)
1967
-42.8 C (-45.0 F)
1968
-43.9 C (-47.0 F)
1969
-31.7 C (-25.1 F)
1970
-37.2 C (-35.0 F)
1971
-36.7 C (-34.1 F)
1972
-38.3 C (-36.9 F)
1973
-35.0 C (-31.0 F)
1974
-37.8 C (-36.0 F)
1975
-32.2 C (-26.0 F)
1976
-33.3 C (-27.9 F)
1977
-36.1 C (-33.0 F)
1978
-36.1 C (-33.0 F)
1979
-36.1 C (-33.0 F)
1980
-36.0 C (-32.8 F)
1981
-34.0 C (-29.2 F)
Wettest day (Rx1day)
The wettest day of the year at Boissevain, 1912 to 1981. The record is 146.1 mm (5.8 in) in 1957, marked on the chart; the median year is 40.4 mm (1.6 in).
Wettest day (Rx1day) at Boissevain by year
Year
Wettest day (Rx1day)
1912
40.6 mm (1.6 in)
1913
32.5 mm (1.3 in)
1914
28.7 mm (1.1 in)
1918
26.9 mm (1.1 in)
1919
16.5 mm (0.6 in)
1922
37.6 mm (1.5 in)
1930
43.2 mm (1.7 in)
1934
25.4 mm (1.0 in)
1935
37.8 mm (1.5 in)
1936
20.8 mm (0.8 in)
1937
64.3 mm (2.5 in)
1938
28.7 mm (1.1 in)
1939
25.9 mm (1.0 in)
1940
40.9 mm (1.6 in)
1941
41.4 mm (1.6 in)
1942
31.8 mm (1.3 in)
1943
43.9 mm (1.7 in)
1944
60.7 mm (2.4 in)
1945
49.3 mm (1.9 in)
1946
42.9 mm (1.7 in)
1947
71.9 mm (2.8 in)
1948
47.0 mm (1.9 in)
1949
32.0 mm (1.3 in)
1950
46.2 mm (1.8 in)
1951
27.4 mm (1.1 in)
1952
28.2 mm (1.1 in)
1953
29.7 mm (1.2 in)
1954
74.9 mm (2.9 in)
1955
40.9 mm (1.6 in)
1956
72.4 mm (2.9 in)
1957
146.1 mm (5.8 in)
1958
33.8 mm (1.3 in)
1959
51.3 mm (2.0 in)
1960
107.4 mm (4.2 in)
1961
26.9 mm (1.1 in)
1962
77.5 mm (3.1 in)
1963
29.2 mm (1.1 in)
1964
26.7 mm (1.1 in)
1965
54.1 mm (2.1 in)
1966
63.5 mm (2.5 in)
1967
24.4 mm (1.0 in)
1968
67.8 mm (2.7 in)
1969
40.6 mm (1.6 in)
1970
21.3 mm (0.8 in)
1971
37.8 mm (1.5 in)
1972
76.2 mm (3.0 in)
1973
39.1 mm (1.5 in)
1974
40.4 mm (1.6 in)
1975
46.5 mm (1.8 in)
1976
31.8 mm (1.3 in)
1977
75.9 mm (3.0 in)
1978
31.2 mm (1.2 in)
1979
23.0 mm (0.9 in)
1980
65.0 mm (2.6 in)
1981
8.0 mm (0.31 in)
Wettest five days (Rx5day)
The wettest five days of the year at Boissevain, 1912 to 1981. The record is 267.1 mm (10.5 in) in 1957, marked on the chart; the median year is 62.0 mm (2.4 in).
Wettest five days (Rx5day) at Boissevain by year
Year
Wettest five days (Rx5day)
1912
60.0 mm (2.4 in)
1913
51.6 mm (2.0 in)
1914
43.2 mm (1.7 in)
1918
53.6 mm (2.1 in)
1919
24.9 mm (1.0 in)
1922
47.8 mm (1.9 in)
1930
61.0 mm (2.4 in)
1934
31.7 mm (1.2 in)
1935
68.8 mm (2.7 in)
1936
32.5 mm (1.3 in)
1937
100.8 mm (4.0 in)
1938
46.0 mm (1.8 in)
1939
62.0 mm (2.4 in)
1940
65.6 mm (2.6 in)
1941
69.4 mm (2.7 in)
1942
43.0 mm (1.7 in)
1943
76.3 mm (3.0 in)
1944
94.8 mm (3.7 in)
1945
66.6 mm (2.6 in)
1946
43.4 mm (1.7 in)
1947
106.1 mm (4.2 in)
1948
118.8 mm (4.7 in)
1949
38.9 mm (1.5 in)
1950
73.9 mm (2.9 in)
1951
51.0 mm (2.0 in)
1952
35.8 mm (1.4 in)
1953
55.6 mm (2.2 in)
1954
174.8 mm (6.9 in)
1955
64.0 mm (2.5 in)
1956
95.2 mm (3.7 in)
1957
267.1 mm (10.5 in)
1958
67.0 mm (2.6 in)
1959
92.7 mm (3.6 in)
1960
115.1 mm (4.5 in)
1961
50.6 mm (2.0 in)
1962
114.4 mm (4.5 in)
1963
55.3 mm (2.2 in)
1964
47.6 mm (1.9 in)
1965
81.0 mm (3.2 in)
1966
77.5 mm (3.1 in)
1967
33.5 mm (1.3 in)
1968
71.4 mm (2.8 in)
1969
86.5 mm (3.4 in)
1970
38.3 mm (1.5 in)
1971
49.8 mm (2.0 in)
1972
84.1 mm (3.3 in)
1973
64.5 mm (2.5 in)
1974
61.2 mm (2.4 in)
1975
113.5 mm (4.5 in)
1976
43.2 mm (1.7 in)
1977
94.2 mm (3.7 in)
1978
39.6 mm (1.6 in)
1979
36.0 mm (1.4 in)
1980
87.3 mm (3.4 in)
1981
11.0 mm (0.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Boissevain, 1912 to 1981. The record is 83 days in 1980, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Boissevain by year
Year
Longest dry spell (CDD)
1912
11 days
1913
15 days
1914
17 days
1918
23 days
1919
29 days
1922
16 days
1930
15 days
1934
18 days
1935
18 days
1936
30 days
1937
22 days
1938
56 days
1939
22 days
1940
23 days
1941
10 days
1942
23 days
1943
57 days
1944
46 days
1945
27 days
1946
20 days
1947
37 days
1948
39 days
1949
19 days
1950
26 days
1951
20 days
1952
46 days
1953
23 days
1954
14 days
1955
22 days
1956
30 days
1957
24 days
1958
16 days
1959
22 days
1960
21 days
1961
37 days
1962
21 days
1963
31 days
1964
25 days
1965
31 days
1966
22 days
1967
35 days
1968
38 days
1969
24 days
1970
30 days
1971
16 days
1972
20 days
1973
42 days
1974
65 days
1975
26 days
1976
28 days
1977
42 days
1978
29 days
1979
21 days
1980
83 days
1981
52 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
20 years with a frost
Across 20 years with a frost, the median last spring frost at Boissevain falls on 20 May and the median first autumn frost on 18 September, which leaves a median of 126 days between them.
Frost dates and growing season at Boissevain
Measure
Median, all years
Earliest period
Recent period (1943 to 1980)
Recent against earliest
Fitted trend
Last spring frost
20 May
n/a
20 May
n/a
n/a
First autumn frost
18 September
n/a
18 September
n/a
n/a
Growing days
126 days
n/a
126 days
n/a
n/a
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.
Download the Data
Data for Boissevain standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Boissevain 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.