Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Grindstone 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 Grindstone Island, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
8.9 C (48.0 F)
-25.6 C (-14.1 F)
n/a
n/a
Feb
7.8 C (46.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Mar
10.6 C (51.1 F)
-26.1 C (-15.0 F)
n/a
n/a
Apr
16.9 C (62.4 F)
-12.8 C (9.0 F)
n/a
n/a
May
25.0 C (77.0 F)
-6.1 C (21.0 F)
n/a
n/a
Jun
28.9 C (84.0 F)
0.0 C (32.0 F)
n/a
n/a
Jul
31.1 C (88.0 F)
1.8 C (35.2 F)
n/a
n/a
Aug
30.6 C (87.1 F)
3.9 C (39.0 F)
n/a
n/a
Sep
28.3 C (82.9 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
20.0 C (68.0 F)
-5.6 C (21.9 F)
n/a
n/a
Nov
16.7 C (62.1 F)
-12.8 C (9.0 F)
n/a
n/a
Dec
10.8 C (51.4 F)
-24.4 C (-11.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Grindstone Island still stand. 1891 holds the most, with 47.
Standing records at Grindstone Island by the year they were set
Year set
Standing records
1890
20
1891
47
1892
27
1893
21
1894
35
1895
28
1896
25
1897
19
1933
25
1934
34
1935
30
1936
36
1937
29
1938
23
1939
39
1940
12
1941
44
1942
34
1943
26
1944
30
1945
15
1946
22
1947
34
1948
20
1949
23
1950
37
1951
43
1952
16
1953
23
1954
31
1955
20
1956
18
1957
31
1958
21
1959
18
1960
14
1961
16
1962
30
1963
23
1964
14
1965
22
1966
17
1967
37
1968
18
1969
13
1970
10
1971
11
1972
25
1973
20
1974
20
1975
20
1976
26
1977
20
1978
22
1979
32
1980
21
1981
29
1982
45
1983
3
All-Time Record Progression
2 new records
2 all-time records were set at Grindstone Island between 25 March 1967 and 17 March 1976. Each dot is a new record.
When Grindstone Island set new all-time records
Date
Kind
Detail
1967-03-25
Record daily snowfall
Record daily snowfall 64.3 cm (25.3 in)
1976-03-17
Record daily snowfall
Record daily snowfall 97.5 cm (38.4 in)
Wettest Day of Each Month
Sep: 97.3 mm (3.8 in)
The wettest day on record for each calendar month at Grindstone Island. The most was 97.3 mm (3.8 in) on 23 September 1942.
Record daily precipitation for each month at Grindstone Island
Month
Record daily precipitation (mm)
Date
Jan
60.7 mm (2.4 in)
8 January 1979
Feb
43.9 mm (1.7 in)
14 February 1966
Mar
62.2 mm (2.4 in)
15 March 1949
Apr
42.9 mm (1.7 in)
10 April 1951
May
48.3 mm (1.9 in)
14 May 1891
Jun
59.2 mm (2.3 in)
26 June 1958
Jul
62.0 mm (2.4 in)
17 July 1979
Aug
76.2 mm (3.0 in)
19 August 1949
Sep
97.3 mm (3.8 in)
23 September 1942
Oct
60.4 mm (2.4 in)
21 October 1977
Nov
54.1 mm (2.1 in)
6 November 1976
Dec
68.8 mm (2.7 in)
5 December 1937
Period of Record Coverage
1890 to 1983
Complete yearUnder 90 percent of days
59 years of record at Grindstone Island, 1890 to 1983. 5 years have data for under 90 percent of days and are left out of rankings: 1890, 1897, 1933, 1957, 1983.
Cooler than the station meanWarmer than the station mean
One stripe for each of 54 complete years at Grindstone Island, 1891 to 1982. Blue stripes are years cooler than the station's own mean of 4.4 C (39.9 F); red stripes are warmer. The coolest year was 1972, at 3.0 C (37.3 F), and the warmest was 1951, at 5.8 C (42.5 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Grindstone Island as warming stripes, 1891 to 1982
Year
Annual mean temperature
Difference from the station mean
1891
3.8 C
-0.55 C
1892
4.5 C
+0.14 C
1893
3.3 C
-1.07 C
1894
3.4 C
-0.95 C
1895
4.3 C
-0.03 C
1896
3.6 C
-0.82 C
1934
3.1 C
-1.26 C
1935
3.2 C
-1.17 C
1936
3.9 C
-0.43 C
1937
4.8 C
+0.41 C
1938
4.1 C
-0.32 C
1939
3.3 C
-1.03 C
1940
3.9 C
-0.48 C
1941
3.1 C
-1.24 C
1942
4.7 C
+0.31 C
1943
3.8 C
-0.58 C
1944
4.8 C
+0.39 C
1945
5.0 C
+0.59 C
1946
4.7 C
+0.29 C
1947
4.6 C
+0.27 C
1948
4.2 C
-0.22 C
1949
5.1 C
+0.71 C
1950
4.5 C
+0.12 C
1951
5.8 C
+1.45 C
1952
5.5 C
+1.15 C
1953
5.6 C
+1.22 C
1954
4.6 C
+0.21 C
1955
4.7 C
+0.35 C
1956
4.4 C
+0.04 C
1958
5.1 C
+0.70 C
1959
4.2 C
-0.22 C
1960
5.6 C
+1.18 C
1961
4.4 C
+0.03 C
1962
3.9 C
-0.48 C
1963
4.2 C
-0.18 C
1964
4.1 C
-0.31 C
1965
3.8 C
-0.60 C
1966
5.4 C
+1.05 C
1967
4.5 C
+0.13 C
1968
4.6 C
+0.24 C
1969
5.6 C
+1.20 C
1970
4.8 C
+0.42 C
1971
4.7 C
+0.37 C
1972
3.0 C
-1.40 C
1973
4.5 C
+0.11 C
1974
3.8 C
-0.59 C
1975
4.3 C
-0.12 C
1976
4.1 C
-0.23 C
1977
4.5 C
+0.16 C
1978
4.1 C
-0.26 C
1979
5.3 C
+0.92 C
1980
4.0 C
-0.38 C
1981
5.5 C
+1.15 C
1982
4.1 C
-0.27 C
The annual mean temperature here has risen by 0.10 C (0.02 to 0.17) per decade over 1891 to 1982. In Fahrenheit: 0.17 F (0.03 to 0.31) per decade. The slope is a straight line fitted to 54 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Grindstone Island
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.10 C (0.02 to 0.17) per decade
0.17 F (0.03 to 0.31) per decade
1891 to 1982
54
Rise
Mean daily maximum
0.04 C (-0.03 to 0.11) per decade
0.1 F (-0.1 to 0.2) per decade
1891 to 1982
54
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1891 to 1982
54
Rise
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
1871 to 1983
Yearly extremes at Grindstone Island: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
31.1 C (88.0 F)
1949
25.6 C (78.1 F)
59
Coldest night (TNn)
-27.2 C (-17.0 F)
1891
-20.6 C (-5.1 F)
59
Wettest day (Rx1day)
97.3 mm (3.8 in)
1942
43.1 mm (1.7 in)
64
Wettest five days (Rx5day)
212.2 mm (8.4 in)
1942
70.1 mm (2.8 in)
64
Longest dry spell (CDD)
29 days
1937
13 days
64
Hottest day (TXx)
The hottest day of the year at Grindstone Island, 1871 to 1983. The record is 31.1 C (88.0 F) in 1949, marked on the chart; the median year is 25.6 C (78.1 F).
Hottest day (TXx) at Grindstone Island by year
Year
Hottest day (TXx)
1871
n/a
1872
n/a
1873
n/a
1874
n/a
1875
n/a
1890
15.6 C (60.1 F)
1891
23.9 C (75.0 F)
1892
24.4 C (75.9 F)
1893
27.2 C (81.0 F)
1894
25.6 C (78.1 F)
1895
24.4 C (75.9 F)
1896
25.0 C (77.0 F)
1897
18.9 C (66.0 F)
1933
23.3 C (73.9 F)
1934
24.4 C (75.9 F)
1935
30.6 C (87.1 F)
1936
23.9 C (75.0 F)
1937
28.3 C (82.9 F)
1938
25.0 C (77.0 F)
1939
25.6 C (78.1 F)
1940
25.6 C (78.1 F)
1941
24.4 C (75.9 F)
1942
28.3 C (82.9 F)
1943
26.1 C (79.0 F)
1944
30.0 C (86.0 F)
1945
27.2 C (81.0 F)
1946
26.1 C (79.0 F)
1947
28.9 C (84.0 F)
1948
25.6 C (78.1 F)
1949
31.1 C (88.0 F)
1950
25.0 C (77.0 F)
1951
25.0 C (77.0 F)
1952
27.8 C (82.0 F)
1953
25.0 C (77.0 F)
1954
23.3 C (73.9 F)
1955
28.9 C (84.0 F)
1956
23.9 C (75.0 F)
1957
23.3 C (73.9 F)
1958
25.0 C (77.0 F)
1959
24.4 C (75.9 F)
1960
27.8 C (82.0 F)
1961
25.6 C (78.1 F)
1962
26.7 C (80.1 F)
1963
26.7 C (80.1 F)
1964
25.6 C (78.1 F)
1965
25.6 C (78.1 F)
1966
25.0 C (77.0 F)
1967
25.6 C (78.1 F)
1968
26.1 C (79.0 F)
1969
25.0 C (77.0 F)
1970
27.8 C (82.0 F)
1971
26.1 C (79.0 F)
1972
27.2 C (81.0 F)
1973
25.0 C (77.0 F)
1974
26.7 C (80.1 F)
1975
27.2 C (81.0 F)
1976
27.2 C (81.0 F)
1977
26.6 C (79.9 F)
1978
26.5 C (79.7 F)
1979
25.2 C (77.4 F)
1980
27.4 C (81.3 F)
1981
24.5 C (76.1 F)
1982
30.5 C (86.9 F)
1983
6.4 C (43.5 F)
Coldest night (TNn)
The coldest night of the year at Grindstone Island, 1871 to 1983. The record is -27.2 C (-17.0 F) in 1891, marked on the chart; the median year is -20.6 C (-5.1 F).
Coldest night (TNn) at Grindstone Island by year
Year
Coldest night (TNn)
1871
n/a
1872
n/a
1873
n/a
1874
n/a
1875
n/a
1890
-16.1 C (3.0 F)
1891
-27.2 C (-17.0 F)
1892
-17.8 C (0.0 F)
1893
-23.9 C (-11.0 F)
1894
-25.6 C (-14.1 F)
1895
-20.6 C (-5.1 F)
1896
-21.7 C (-7.1 F)
1897
-26.1 C (-15.0 F)
1933
-24.4 C (-11.9 F)
1934
-23.3 C (-9.9 F)
1935
-25.0 C (-13.0 F)
1936
-20.6 C (-5.1 F)
1937
-22.8 C (-9.0 F)
1938
-24.4 C (-11.9 F)
1939
-22.8 C (-9.0 F)
1940
-18.9 C (-2.0 F)
1941
-18.9 C (-2.0 F)
1942
-18.9 C (-2.0 F)
1943
-23.3 C (-9.9 F)
1944
-20.6 C (-5.1 F)
1945
-14.4 C (6.1 F)
1946
-18.3 C (-0.9 F)
1947
-18.9 C (-2.0 F)
1948
-23.3 C (-9.9 F)
1949
-19.4 C (-2.9 F)
1950
-23.9 C (-11.0 F)
1951
-20.6 C (-5.1 F)
1952
-16.1 C (3.0 F)
1953
-16.7 C (1.9 F)
1954
-19.4 C (-2.9 F)
1955
-17.2 C (1.0 F)
1956
-15.0 C (5.0 F)
1957
-22.2 C (-8.0 F)
1958
-15.0 C (5.0 F)
1959
-23.3 C (-9.9 F)
1960
-17.8 C (0.0 F)
1961
-20.6 C (-5.1 F)
1962
-22.2 C (-8.0 F)
1963
-20.0 C (-4.0 F)
1964
-17.2 C (1.0 F)
1965
-20.6 C (-5.1 F)
1966
-21.1 C (-6.0 F)
1967
-26.1 C (-15.0 F)
1968
-23.3 C (-9.9 F)
1969
-15.0 C (5.0 F)
1970
-20.0 C (-4.0 F)
1971
-19.4 C (-2.9 F)
1972
-25.0 C (-13.0 F)
1973
-21.7 C (-7.1 F)
1974
-23.3 C (-9.9 F)
1975
-25.0 C (-13.0 F)
1976
-18.9 C (-2.0 F)
1977
-19.1 C (-2.4 F)
1978
-18.2 C (-0.8 F)
1979
-21.4 C (-6.5 F)
1980
-18.2 C (-0.8 F)
1981
-22.8 C (-9.0 F)
1982
-24.2 C (-11.6 F)
1983
-15.6 C (3.9 F)
Wettest day (Rx1day)
The wettest day of the year at Grindstone Island, 1871 to 1983. The record is 97.3 mm (3.8 in) in 1942, marked on the chart; the median year is 43.1 mm (1.7 in).
Wettest day (Rx1day) at Grindstone Island by year
Year
Wettest day (Rx1day)
1871
46.2 mm (1.8 in)
1872
21.3 mm (0.8 in)
1873
16.3 mm (0.6 in)
1874
36.6 mm (1.4 in)
1875
34.0 mm (1.3 in)
1890
76.2 mm (3.0 in)
1891
77.7 mm (3.1 in)
1892
68.3 mm (2.7 in)
1893
57.7 mm (2.3 in)
1894
43.2 mm (1.7 in)
1895
41.9 mm (1.6 in)
1896
30.5 mm (1.2 in)
1897
33.0 mm (1.3 in)
1933
30.0 mm (1.2 in)
1934
45.7 mm (1.8 in)
1935
73.2 mm (2.9 in)
1936
45.7 mm (1.8 in)
1937
68.8 mm (2.7 in)
1938
34.0 mm (1.3 in)
1939
58.9 mm (2.3 in)
1940
54.9 mm (2.2 in)
1941
38.6 mm (1.5 in)
1942
97.3 mm (3.8 in)
1943
39.1 mm (1.5 in)
1944
38.9 mm (1.5 in)
1945
42.2 mm (1.7 in)
1946
32.0 mm (1.3 in)
1947
41.1 mm (1.6 in)
1948
26.4 mm (1.0 in)
1949
76.2 mm (3.0 in)
1950
45.2 mm (1.8 in)
1951
42.9 mm (1.7 in)
1952
50.3 mm (2.0 in)
1953
45.0 mm (1.8 in)
1954
24.9 mm (1.0 in)
1955
35.8 mm (1.4 in)
1956
29.2 mm (1.1 in)
1957
52.3 mm (2.1 in)
1958
59.2 mm (2.3 in)
1959
29.2 mm (1.1 in)
1960
38.1 mm (1.5 in)
1961
67.3 mm (2.6 in)
1962
39.1 mm (1.5 in)
1963
37.3 mm (1.5 in)
1964
42.9 mm (1.7 in)
1965
43.7 mm (1.7 in)
1966
43.9 mm (1.7 in)
1967
61.7 mm (2.4 in)
1968
55.9 mm (2.2 in)
1969
32.3 mm (1.3 in)
1970
38.6 mm (1.5 in)
1971
50.0 mm (2.0 in)
1972
66.3 mm (2.6 in)
1973
33.8 mm (1.3 in)
1974
34.3 mm (1.4 in)
1975
36.8 mm (1.4 in)
1976
54.1 mm (2.1 in)
1977
60.4 mm (2.4 in)
1978
46.0 mm (1.8 in)
1979
62.0 mm (2.4 in)
1980
39.9 mm (1.6 in)
1981
52.2 mm (2.1 in)
1982
44.2 mm (1.7 in)
1983
27.2 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Grindstone Island, 1871 to 1983. The record is 212.2 mm (8.4 in) in 1942, marked on the chart; the median year is 70.1 mm (2.8 in).
Wettest five days (Rx5day) at Grindstone Island by year
Year
Wettest five days (Rx5day)
1871
46.5 mm (1.8 in)
1872
33.0 mm (1.3 in)
1873
26.6 mm (1.0 in)
1874
17.6 mm (0.7 in)
1875
12.4 mm (0.5 in)
1890
105.9 mm (4.2 in)
1891
118.6 mm (4.7 in)
1892
161.5 mm (6.4 in)
1893
113.8 mm (4.5 in)
1894
85.1 mm (3.4 in)
1895
138.4 mm (5.4 in)
1896
70.9 mm (2.8 in)
1897
49.6 mm (2.0 in)
1933
58.7 mm (2.3 in)
1934
61.4 mm (2.4 in)
1935
145.3 mm (5.7 in)
1936
65.3 mm (2.6 in)
1937
116.0 mm (4.6 in)
1938
51.4 mm (2.0 in)
1939
106.8 mm (4.2 in)
1940
83.4 mm (3.3 in)
1941
68.0 mm (2.7 in)
1942
212.2 mm (8.4 in)
1943
64.7 mm (2.5 in)
1944
65.3 mm (2.6 in)
1945
64.2 mm (2.5 in)
1946
39.5 mm (1.6 in)
1947
61.7 mm (2.4 in)
1948
37.3 mm (1.5 in)
1949
121.2 mm (4.8 in)
1950
57.2 mm (2.3 in)
1951
74.1 mm (2.9 in)
1952
64.6 mm (2.5 in)
1953
64.1 mm (2.5 in)
1954
47.1 mm (1.9 in)
1955
63.5 mm (2.5 in)
1956
56.4 mm (2.2 in)
1957
75.5 mm (3.0 in)
1958
69.1 mm (2.7 in)
1959
77.5 mm (3.1 in)
1960
50.5 mm (2.0 in)
1961
71.6 mm (2.8 in)
1962
69.3 mm (2.7 in)
1963
45.8 mm (1.8 in)
1964
115.2 mm (4.5 in)
1965
109.6 mm (4.3 in)
1966
74.6 mm (2.9 in)
1967
81.6 mm (3.2 in)
1968
100.7 mm (4.0 in)
1969
59.7 mm (2.4 in)
1970
78.2 mm (3.1 in)
1971
91.4 mm (3.6 in)
1972
84.9 mm (3.3 in)
1973
70.9 mm (2.8 in)
1974
50.1 mm (2.0 in)
1975
54.3 mm (2.1 in)
1976
74.2 mm (2.9 in)
1977
94.1 mm (3.7 in)
1978
82.5 mm (3.2 in)
1979
81.9 mm (3.2 in)
1980
55.0 mm (2.2 in)
1981
104.0 mm (4.1 in)
1982
84.0 mm (3.3 in)
1983
31.6 mm (1.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Grindstone Island, 1871 to 1983. The record is 29 days in 1937, marked on the chart; the median year is 13 days.
Longest dry spell (CDD) at Grindstone Island by year
Year
Longest dry spell (CDD)
1871
9 days
1872
19 days
1873
11 days
1874
12 days
1875
15 days
1890
10 days
1891
15 days
1892
13 days
1893
27 days
1894
21 days
1895
14 days
1896
13 days
1897
12 days
1933
8 days
1934
13 days
1935
11 days
1936
12 days
1937
29 days
1938
14 days
1939
17 days
1940
13 days
1941
8 days
1942
14 days
1943
7 days
1944
12 days
1945
16 days
1946
10 days
1947
19 days
1948
13 days
1949
13 days
1950
17 days
1951
11 days
1952
17 days
1953
12 days
1954
17 days
1955
16 days
1956
17 days
1957
16 days
1958
15 days
1959
12 days
1960
28 days
1961
24 days
1962
21 days
1963
10 days
1964
13 days
1965
13 days
1966
12 days
1967
13 days
1968
11 days
1969
15 days
1970
22 days
1971
12 days
1972
13 days
1973
13 days
1974
13 days
1975
13 days
1976
10 days
1977
13 days
1978
16 days
1979
10 days
1980
14 days
1981
19 days
1982
12 days
1983
8 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
54 years with a frost
Across 54 years with a frost, the median last spring frost at Grindstone Island falls on 13 May and the median first autumn frost on 28 October, which leaves a median of 168 days between them.
Fitted over all years, the growing season changes by +1.6 days per decade at this station.
Frost dates and growing season at Grindstone Island
Measure
Median, all years
Earliest period
Recent period (1952 to 1982)
Recent against earliest
Fitted trend
Last spring frost
13 May
n/a
10 May
n/a
-0.6 days per decade
First autumn frost
28 October
n/a
29 October
n/a
+1.0 days per decade
Growing days
168 days
n/a
171 days
n/a
+1.6 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
54 years, 1891 to 1982
A day with at least 44.8 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 98.5 mm (3.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Grindstone 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
44.8 mm (1.8 in)
5 years
58.1 mm (2.3 in)
10 years
67.3 mm (2.6 in)
25 years
79.5 mm (3.1 in)
50 years
88.9 mm (3.5 in)
100 years
98.5 mm (3.9 in)
Longer than the 54 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, 54 years of values from 1891 to 1982.
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: 97.3 mm (3.8 in) in 1942; 77.7 mm (3.1 in) in 1891; 76.2 mm (3.0 in) in 1949.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Grindstone Island, at 1942. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1942 ran 0.4 C (0.8 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Grindstone Island, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1942
+0.4
+0.8
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 Grindstone Island standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Grindstone 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.