Record envelope, standing records and threshold days for Brule Island (USC00471139), Wisconsin, United States, with 68 years of record.
Key Facts for Brule Island
Brule Island (USC00471139) is a weather station in Wisconsin, United States at 45.95 latitude and -88.22 longitude, 381 m (1,250 ft) above sea level.
The station reports from 1922 to 1989, 68 years of record.
1,464 records set at Brule Island still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Brule Island set a daily record low minimum temperature of -28.3 C (-18.9 F) on 22 December 1989.
About the Station
Location: Wisconsin, United States, 45.95 latitude, -88.22 longitude.
Elevation: 381 m (1,250 ft).
Period of record: 1922 to 1989, 68 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Brule Island. 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 Brule Island, 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)
-40.6 C (-41.1 F)
n/a
n/a
Feb
14.4 C (57.9 F)
-44.4 C (-47.9 F)
n/a
n/a
Mar
27.2 C (81.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Apr
32.2 C (90.0 F)
-21.7 C (-7.1 F)
n/a
n/a
May
35.0 C (95.0 F)
-8.9 C (16.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
38.9 C (102.0 F)
0.0 C (32.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-14.4 C (6.1 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Dec
14.4 C (57.9 F)
-39.4 C (-38.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Brule Island still stand. 1941 holds the most, with 48.
Standing records at Brule Island by the year they were set
Year set
Standing records
1936
35
1937
45
1938
26
1939
40
1940
26
1941
48
1942
35
1943
29
1944
38
1945
44
1946
30
1947
34
1948
28
1949
35
1950
34
1951
32
1952
33
1953
26
1954
21
1955
21
1956
32
1957
11
1958
25
1959
25
1960
17
1961
9
1962
20
1963
32
1964
35
1965
32
1966
16
1967
23
1968
24
1969
15
1970
14
1971
28
1972
29
1973
24
1974
31
1975
17
1976
35
1977
30
1978
11
1979
29
1980
12
1981
21
1982
23
1983
41
1984
23
1985
24
1986
22
1987
27
1988
29
1989
18
All-Time Record Progression
4 new records
4 all-time records were set at Brule Island between 9 January 1977 and 17 January 1982. Each dot is a new record.
When Brule Island set new all-time records
Date
Kind
Detail
1977-01-09
Record low minimum temperature
Record low minimum temperature -40.6 C (-41.1 F)
1977-07-19
Record high maximum temperature
Record high maximum temperature 38.9 C (102.0 F)
1979-02-17
Record low minimum temperature
Record low minimum temperature -44.4 C (-47.9 F)
1982-01-17
Record low maximum temperature
Record low maximum temperature -28.9 C (-20.0 F)
Wettest Day of Each Month
Jul: 115.8 mm (4.6 in)
The wettest day on record for each calendar month at Brule Island. The most was 115.8 mm (4.6 in) on 17 July 1942.
Record daily precipitation for each month at Brule Island
Month
Record daily precipitation (mm)
Date
Jan
42.4 mm (1.7 in)
5 January 1939
Feb
35.1 mm (1.4 in)
21 February 1937
Mar
41.9 mm (1.6 in)
23 March 1979
Apr
54.6 mm (2.1 in)
1 April 1926
May
70.6 mm (2.8 in)
13 May 1942
Jun
80.3 mm (3.2 in)
30 June 1953
Jul
115.8 mm (4.6 in)
17 July 1942
Aug
95.8 mm (3.8 in)
29 August 1941
Sep
87.1 mm (3.4 in)
20 September 1925
Oct
50.3 mm (2.0 in)
12 October 1986
Nov
43.4 mm (1.7 in)
2 November 1985
Dec
34.3 mm (1.4 in)
28 December 1959
Period of Record Coverage
1936 to 1989
Complete yearUnder 90 percent of days
54 years of record at Brule Island, 1936 to 1989. 2 years have data for under 90 percent of days and are left out of rankings: 1936, 1989.
Cooler than the station meanWarmer than the station mean
One stripe for each of 50 complete years at Brule Island, 1937 to 1989. Blue stripes are years cooler than the station's own mean of 4.3 C (39.7 F); red stripes are warmer. The coolest year was 1972, at 2.5 C (36.6 F), and the warmest was 1941, at 6.4 C (43.5 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Brule Island as warming stripes, 1937 to 1989
Year
Annual mean temperature
Difference from the station mean
1937
4.7 C
+0.36 C
1938
6.0 C
+1.73 C
1939
5.6 C
+1.32 C
1940
4.7 C
+0.44 C
1941
6.4 C
+2.10 C
1942
5.8 C
+1.48 C
1943
5.0 C
+0.69 C
1944
6.2 C
+1.87 C
1945
5.2 C
+0.86 C
1946
6.4 C
+2.08 C
1947
5.2 C
+0.89 C
1948
4.2 C
-0.10 C
1949
5.2 C
+0.87 C
1950
2.6 C
-1.73 C
1951
3.4 C
-0.94 C
1952
4.6 C
+0.30 C
1953
5.3 C
+1.02 C
1954
4.1 C
-0.24 C
1955
4.3 C
+0.03 C
1956
4.0 C
-0.26 C
1957
3.8 C
-0.47 C
1958
3.9 C
-0.43 C
1959
3.7 C
-0.57 C
1960
3.8 C
-0.55 C
1961
4.2 C
-0.15 C
1962
3.7 C
-0.58 C
1963
3.6 C
-0.72 C
1964
3.8 C
-0.49 C
1965
3.0 C
-1.27 C
1966
4.0 C
-0.35 C
1967
2.9 C
-1.45 C
1968
4.4 C
+0.06 C
1969
3.9 C
-0.40 C
1970
3.7 C
-0.57 C
1971
3.6 C
-0.69 C
1972
2.5 C
-1.77 C
1973
5.0 C
+0.74 C
1974
3.8 C
-0.54 C
1975
4.4 C
+0.14 C
1976
3.4 C
-0.95 C
1977
4.6 C
+0.31 C
1978
3.8 C
-0.50 C
1979
3.2 C
-1.14 C
1982
3.6 C
-0.70 C
1983
4.9 C
+0.64 C
1984
4.5 C
+0.19 C
1985
3.4 C
-0.95 C
1987
5.9 C
+1.61 C
1988
4.2 C
-0.06 C
1989
3.2 C
-1.10 C
The annual mean temperature here has fallen by 0.3 C (0.1 to 0.5) per decade over 1937 to 1989. In Fahrenheit: 0.5 F (0.3 to 0.8) per decade. The slope is a straight line fitted to 50 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Brule Island
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.3 C (-0.5 to -0.1) per decade
-0.5 F (-0.8 to -0.3) per decade
1937 to 1989
50
Fall
Mean daily maximum
-0.5 C (-0.7 to -0.3) per decade
-0.9 F (-1.2 to -0.6) per decade
1937 to 1989
50
Fall
Mean daily minimum
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.5 to 0.2) per decade
1937 to 1989
50
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
1922 to 1989
Yearly extremes at Brule Island: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.9 C (102.0 F)
1977
34.4 C (93.9 F)
54
Coldest night (TNn)
-44.4 C (-47.9 F)
1979
-34.4 C (-29.9 F)
54
Wettest day (Rx1day)
115.8 mm (4.6 in)
1942
49.6 mm (2.0 in)
68
Wettest five days (Rx5day)
158.6 mm (6.2 in)
1941
76.3 mm (3.0 in)
68
Longest dry spell (CDD)
36 days
1982
20 days
68
Hottest day (TXx)
The hottest day of the year at Brule Island, 1922 to 1989. The record is 38.9 C (102.0 F) in 1977, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Brule Island by year
Year
Hottest day (TXx)
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
37.8 C (100.0 F)
1937
36.7 C (98.1 F)
1938
33.9 C (93.0 F)
1939
36.7 C (98.1 F)
1940
34.4 C (93.9 F)
1941
37.8 C (100.0 F)
1942
35.6 C (96.1 F)
1943
33.3 C (91.9 F)
1944
35.0 C (95.0 F)
1945
33.9 C (93.0 F)
1946
33.9 C (93.0 F)
1947
37.8 C (100.0 F)
1948
35.6 C (96.1 F)
1949
36.7 C (98.1 F)
1950
31.7 C (89.1 F)
1951
31.7 C (89.1 F)
1952
32.8 C (91.0 F)
1953
33.3 C (91.9 F)
1954
32.2 C (90.0 F)
1955
36.1 C (97.0 F)
1956
35.0 C (95.0 F)
1957
36.1 C (97.0 F)
1958
34.4 C (93.9 F)
1959
32.8 C (91.0 F)
1960
32.2 C (90.0 F)
1961
32.8 C (91.0 F)
1962
31.7 C (89.1 F)
1963
38.3 C (100.9 F)
1964
34.4 C (93.9 F)
1965
35.0 C (95.0 F)
1966
35.0 C (95.0 F)
1967
31.1 C (88.0 F)
1968
33.9 C (93.0 F)
1969
33.9 C (93.0 F)
1970
33.3 C (91.9 F)
1971
35.0 C (95.0 F)
1972
32.8 C (91.0 F)
1973
35.0 C (95.0 F)
1974
35.0 C (95.0 F)
1975
35.6 C (96.1 F)
1976
35.0 C (95.0 F)
1977
38.9 C (102.0 F)
1978
32.2 C (90.0 F)
1979
32.8 C (91.0 F)
1980
34.4 C (93.9 F)
1981
32.8 C (91.0 F)
1982
31.7 C (89.1 F)
1983
35.0 C (95.0 F)
1984
30.6 C (87.1 F)
1985
30.6 C (87.1 F)
1986
36.1 C (97.0 F)
1987
34.4 C (93.9 F)
1988
36.7 C (98.1 F)
1989
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Brule Island, 1922 to 1989. The record is -44.4 C (-47.9 F) in 1979, marked on the chart; the median year is -34.4 C (-29.9 F).
Coldest night (TNn) at Brule Island by year
Year
Coldest night (TNn)
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
-27.8 C (-18.0 F)
1937
-31.7 C (-25.1 F)
1938
-39.4 C (-38.9 F)
1939
-36.1 C (-33.0 F)
1940
-33.9 C (-29.0 F)
1941
-30.0 C (-22.0 F)
1942
-31.1 C (-24.0 F)
1943
-34.4 C (-29.9 F)
1944
-31.1 C (-24.0 F)
1945
-33.9 C (-29.0 F)
1946
-33.3 C (-27.9 F)
1947
-32.8 C (-27.0 F)
1948
-39.4 C (-38.9 F)
1949
-30.0 C (-22.0 F)
1950
-34.4 C (-29.9 F)
1951
-39.4 C (-38.9 F)
1952
-32.2 C (-26.0 F)
1953
-29.4 C (-20.9 F)
1954
-32.2 C (-26.0 F)
1955
-31.1 C (-24.0 F)
1956
-29.4 C (-20.9 F)
1957
-34.4 C (-29.9 F)
1958
-37.2 C (-35.0 F)
1959
-37.8 C (-36.0 F)
1960
-33.3 C (-27.9 F)
1961
-33.3 C (-27.9 F)
1962
-38.3 C (-36.9 F)
1963
-36.1 C (-33.0 F)
1964
-35.0 C (-31.0 F)
1965
-40.0 C (-40.0 F)
1966
-30.6 C (-23.1 F)
1967
-36.7 C (-34.1 F)
1968
-36.1 C (-33.0 F)
1969
-28.3 C (-18.9 F)
1970
-38.3 C (-36.9 F)
1971
-38.3 C (-36.9 F)
1972
-37.8 C (-36.0 F)
1973
-36.1 C (-33.0 F)
1974
-36.1 C (-33.0 F)
1975
-32.8 C (-27.0 F)
1976
-39.4 C (-38.9 F)
1977
-40.6 C (-41.1 F)
1978
-34.4 C (-29.9 F)
1979
-44.4 C (-47.9 F)
1980
-30.6 C (-23.1 F)
1981
-37.2 C (-35.0 F)
1982
-37.8 C (-36.0 F)
1983
-38.9 C (-38.0 F)
1984
-38.3 C (-36.9 F)
1985
-36.1 C (-33.0 F)
1986
-36.7 C (-34.1 F)
1987
-30.0 C (-22.0 F)
1988
-34.4 C (-29.9 F)
1989
-34.4 C (-29.9 F)
Wettest day (Rx1day)
The wettest day of the year at Brule Island, 1922 to 1989. The record is 115.8 mm (4.6 in) in 1942, marked on the chart; the median year is 49.6 mm (2.0 in).
Wettest day (Rx1day) at Brule Island by year
Year
Wettest day (Rx1day)
1922
36.6 mm (1.4 in)
1923
53.8 mm (2.1 in)
1924
31.8 mm (1.3 in)
1925
87.1 mm (3.4 in)
1926
54.6 mm (2.1 in)
1927
48.8 mm (1.9 in)
1928
47.0 mm (1.9 in)
1929
50.3 mm (2.0 in)
1930
38.6 mm (1.5 in)
1931
55.4 mm (2.2 in)
1932
41.7 mm (1.6 in)
1933
46.2 mm (1.8 in)
1934
31.8 mm (1.3 in)
1935
47.0 mm (1.9 in)
1936
42.7 mm (1.7 in)
1937
47.5 mm (1.9 in)
1938
69.3 mm (2.7 in)
1939
60.2 mm (2.4 in)
1940
46.2 mm (1.8 in)
1941
95.8 mm (3.8 in)
1942
115.8 mm (4.6 in)
1943
55.9 mm (2.2 in)
1944
48.5 mm (1.9 in)
1945
60.2 mm (2.4 in)
1946
63.2 mm (2.5 in)
1947
34.8 mm (1.4 in)
1948
43.9 mm (1.7 in)
1949
74.7 mm (2.9 in)
1950
45.7 mm (1.8 in)
1951
51.3 mm (2.0 in)
1952
51.1 mm (2.0 in)
1953
80.3 mm (3.2 in)
1954
38.9 mm (1.5 in)
1955
65.5 mm (2.6 in)
1956
77.5 mm (3.1 in)
1957
35.6 mm (1.4 in)
1958
32.5 mm (1.3 in)
1959
44.7 mm (1.8 in)
1960
51.3 mm (2.0 in)
1961
45.2 mm (1.8 in)
1962
30.0 mm (1.2 in)
1963
26.7 mm (1.1 in)
1964
82.3 mm (3.2 in)
1965
58.2 mm (2.3 in)
1966
51.6 mm (2.0 in)
1967
40.6 mm (1.6 in)
1968
73.2 mm (2.9 in)
1969
45.2 mm (1.8 in)
1970
51.1 mm (2.0 in)
1971
34.3 mm (1.4 in)
1972
95.0 mm (3.7 in)
1973
45.7 mm (1.8 in)
1974
41.9 mm (1.6 in)
1975
47.2 mm (1.9 in)
1976
51.6 mm (2.0 in)
1977
56.4 mm (2.2 in)
1978
55.9 mm (2.2 in)
1979
55.1 mm (2.2 in)
1980
45.5 mm (1.8 in)
1981
74.9 mm (2.9 in)
1982
78.7 mm (3.1 in)
1983
55.6 mm (2.2 in)
1984
42.9 mm (1.7 in)
1985
43.4 mm (1.7 in)
1986
50.3 mm (2.0 in)
1987
55.6 mm (2.2 in)
1988
43.9 mm (1.7 in)
1989
33.5 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Brule Island, 1922 to 1989. The record is 158.6 mm (6.2 in) in 1941, marked on the chart; the median year is 76.3 mm (3.0 in).
Wettest five days (Rx5day) at Brule Island by year
Year
Wettest five days (Rx5day)
1922
64.3 mm (2.5 in)
1923
70.0 mm (2.8 in)
1924
52.1 mm (2.1 in)
1925
91.7 mm (3.6 in)
1926
75.0 mm (3.0 in)
1927
91.7 mm (3.6 in)
1928
133.9 mm (5.3 in)
1929
67.9 mm (2.7 in)
1930
58.1 mm (2.3 in)
1931
84.4 mm (3.3 in)
1932
93.0 mm (3.7 in)
1933
67.0 mm (2.6 in)
1934
58.4 mm (2.3 in)
1935
65.0 mm (2.6 in)
1936
76.2 mm (3.0 in)
1937
82.1 mm (3.2 in)
1938
87.9 mm (3.5 in)
1939
81.4 mm (3.2 in)
1940
62.2 mm (2.4 in)
1941
158.6 mm (6.2 in)
1942
133.3 mm (5.2 in)
1943
122.4 mm (4.8 in)
1944
66.6 mm (2.6 in)
1945
68.8 mm (2.7 in)
1946
128.9 mm (5.1 in)
1947
37.8 mm (1.5 in)
1948
64.8 mm (2.6 in)
1949
92.2 mm (3.6 in)
1950
76.4 mm (3.0 in)
1951
100.3 mm (3.9 in)
1952
98.3 mm (3.9 in)
1953
133.4 mm (5.3 in)
1954
64.8 mm (2.6 in)
1955
75.2 mm (3.0 in)
1956
101.3 mm (4.0 in)
1957
59.9 mm (2.4 in)
1958
82.5 mm (3.2 in)
1959
82.3 mm (3.2 in)
1960
88.4 mm (3.5 in)
1961
61.8 mm (2.4 in)
1962
48.5 mm (1.9 in)
1963
69.3 mm (2.7 in)
1964
104.9 mm (4.1 in)
1965
97.1 mm (3.8 in)
1966
72.0 mm (2.8 in)
1967
57.9 mm (2.3 in)
1968
113.6 mm (4.5 in)
1969
47.7 mm (1.9 in)
1970
82.6 mm (3.3 in)
1971
85.3 mm (3.4 in)
1972
99.4 mm (3.9 in)
1973
94.4 mm (3.7 in)
1974
50.0 mm (2.0 in)
1975
62.4 mm (2.5 in)
1976
66.6 mm (2.6 in)
1977
72.7 mm (2.9 in)
1978
79.2 mm (3.1 in)
1979
81.5 mm (3.2 in)
1980
70.6 mm (2.8 in)
1981
108.9 mm (4.3 in)
1982
105.1 mm (4.1 in)
1983
87.3 mm (3.4 in)
1984
64.3 mm (2.5 in)
1985
69.5 mm (2.7 in)
1986
65.9 mm (2.6 in)
1987
99.3 mm (3.9 in)
1988
54.3 mm (2.1 in)
1989
50.8 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Brule Island, 1922 to 1989. The record is 36 days in 1982, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Brule Island by year
Year
Longest dry spell (CDD)
1922
13 days
1923
27 days
1924
18 days
1925
32 days
1926
16 days
1927
16 days
1928
24 days
1929
16 days
1930
23 days
1931
20 days
1932
22 days
1933
16 days
1934
14 days
1935
13 days
1936
21 days
1937
14 days
1938
26 days
1939
13 days
1940
13 days
1941
23 days
1942
20 days
1943
26 days
1944
21 days
1945
22 days
1946
18 days
1947
19 days
1948
19 days
1949
23 days
1950
14 days
1951
19 days
1952
32 days
1953
29 days
1954
21 days
1955
16 days
1956
19 days
1957
18 days
1958
29 days
1959
17 days
1960
19 days
1961
30 days
1962
15 days
1963
16 days
1964
17 days
1965
21 days
1966
18 days
1967
26 days
1968
19 days
1969
30 days
1970
25 days
1971
30 days
1972
15 days
1973
18 days
1974
15 days
1975
22 days
1976
29 days
1977
16 days
1978
26 days
1979
17 days
1980
30 days
1981
25 days
1982
36 days
1983
28 days
1984
21 days
1985
19 days
1986
19 days
1987
23 days
1988
36 days
1989
22 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
50 years with a frost
Across 50 years with a frost, the median last spring frost at Brule Island falls on 5 June and the median first autumn frost on 12 September, which leaves a median of 101 days between them.
Fitted over all years, the growing season changes by +6.2 days per decade at this station.
Frost dates and growing season at Brule Island
Measure
Median, all years
Earliest period
Recent period (1957 to 1989)
Recent against earliest
Fitted trend
Last spring frost
5 June
n/a
31 May
n/a
-2.9 days per decade
First autumn frost
12 September
n/a
15 September
n/a
+3.2 days per decade
Growing days
101 days
n/a
108 days
n/a
+6.2 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
66 years, 1923 to 1989
A day with at least 49.5 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 116.0 mm (4.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Brule Island: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
49.5 mm (1.9 in)
5 years
64.4 mm (2.5 in)
10 years
75.3 mm (3.0 in)
25 years
90.5 mm (3.6 in)
50 years
102.8 mm (4.0 in)
100 years
116.0 mm (4.6 in)
Longer than the 66 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, 66 years of values from 1923 to 1989.
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: 115.8 mm (4.6 in) in 1942; 95.8 mm (3.8 in) in 1941; 95.0 mm (3.7 in) in 1972.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Brule Island, at 1977. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1977 ran 0.3 C (0.6 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Brule Island, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1977
+0.3
+0.6
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Brule Island standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Brule Island 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.