Record envelope, standing records and threshold days for Shearwater A (CA008205090), Nova Scotia, Canada, with 64 years of record.
Key Facts for Shearwater A
Shearwater A (CA008205090) is a weather station in Nova Scotia, Canada at 44.63 latitude and -63.50 longitude, 44 m (144 ft) above sea level.
The station reports from 1944 to 2007, 64 years of record.
1,464 records set at Shearwater A still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Shearwater A set a daily record snowfall of 25.4 cm (10.0 in) on 24 December 1983.
About the Station
Location: Nova Scotia, Canada, 44.63 latitude, -63.50 longitude.
Elevation: 44 m (144 ft).
Period of record: 1944 to 2007, 64 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Shearwater A. 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 Shearwater A, 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)
-26.1 C (-15.0 F)
n/a
n/a
Feb
11.7 C (53.1 F)
-25.6 C (-14.1 F)
n/a
n/a
Mar
18.3 C (64.9 F)
-22.2 C (-8.0 F)
n/a
n/a
Apr
27.8 C (82.0 F)
-12.2 C (10.0 F)
n/a
n/a
May
32.0 C (89.6 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
33.0 C (91.4 F)
2.0 C (35.6 F)
n/a
n/a
Jul
33.3 C (91.9 F)
6.7 C (44.1 F)
n/a
n/a
Aug
31.1 C (88.0 F)
5.6 C (42.1 F)
n/a
n/a
Sep
33.3 C (91.9 F)
-0.5 C (31.1 F)
n/a
n/a
Oct
27.8 C (82.0 F)
-5.6 C (21.9 F)
n/a
n/a
Nov
22.2 C (72.0 F)
-11.4 C (11.5 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-21.5 C (-6.7 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Shearwater A still stand. 1946 holds the most, with 55.
Standing records at Shearwater A by the year they were set
Year set
Standing records
1944
54
1945
36
1946
55
1947
44
1948
44
1949
44
1950
52
1951
48
1952
25
1953
49
1954
35
1955
27
1956
40
1957
49
1958
26
1959
43
1960
16
1961
32
1962
35
1963
42
1964
29
1965
31
1966
24
1967
38
1968
32
1969
28
1970
29
1971
28
1972
50
1973
32
1974
32
1975
22
1976
43
1977
28
1978
32
1979
49
1980
28
1981
34
1982
47
1983
32
Wettest Day of Each Month
Aug: 184.9 mm (7.3 in)
The wettest day on record for each calendar month at Shearwater A. The most was 184.9 mm (7.3 in) on 15 August 1971.
Record daily precipitation for each month at Shearwater A
Month
Record daily precipitation (mm)
Date
Jan
78.2 mm (3.1 in)
16 January 1958
Feb
87.9 mm (3.5 in)
8 February 1958
Mar
70.4 mm (2.8 in)
23 March 1972
Apr
96.9 mm (3.8 in)
28 April 1982
May
91.4 mm (3.6 in)
1 May 1947
Jun
80.0 mm (3.1 in)
21 June 1944
Jul
131.6 mm (5.2 in)
20 July 1954
Aug
184.9 mm (7.3 in)
15 August 1971
Sep
75.2 mm (3.0 in)
14 September 1964
Oct
78.2 mm (3.1 in)
10 October 1967
Nov
69.1 mm (2.7 in)
15 November 1959
Dec
111.3 mm (4.4 in)
21 December 1946
Period of Record Coverage
1944 to 1983
Complete yearUnder 90 percent of days
40 years of record at Shearwater A, 1944 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1944.
Cooler than the station meanWarmer than the station mean
One stripe for each of 39 complete years at Shearwater A, 1945 to 1983. Blue stripes are years cooler than the station's own mean of 6.7 C (44.1 F); red stripes are warmer. The coolest year was 1972, at 5.6 C (42.0 F), and the warmest was 1953, at 8.1 C (46.5 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Shearwater A as warming stripes, 1945 to 1983
Year
Annual mean temperature
Difference from the station mean
1945
7.0 C
+0.34 C
1946
6.8 C
+0.13 C
1947
7.3 C
+0.63 C
1948
6.0 C
-0.74 C
1949
7.6 C
+0.92 C
1950
6.6 C
-0.07 C
1951
7.8 C
+1.14 C
1952
7.5 C
+0.75 C
1953
8.1 C
+1.35 C
1954
7.2 C
+0.45 C
1955
6.6 C
-0.07 C
1956
6.6 C
-0.10 C
1957
7.0 C
+0.31 C
1958
7.0 C
+0.29 C
1959
6.8 C
+0.10 C
1960
7.4 C
+0.72 C
1961
6.6 C
-0.07 C
1962
5.9 C
-0.79 C
1963
6.1 C
-0.61 C
1964
6.0 C
-0.70 C
1965
5.6 C
-1.07 C
1966
6.9 C
+0.15 C
1967
6.0 C
-0.72 C
1968
6.6 C
-0.06 C
1969
7.4 C
+0.71 C
1970
6.2 C
-0.52 C
1971
6.5 C
-0.20 C
1972
5.6 C
-1.15 C
1973
6.8 C
+0.08 C
1974
6.0 C
-0.72 C
1975
6.4 C
-0.32 C
1976
6.8 C
+0.13 C
1977
6.7 C
+0.02 C
1978
6.0 C
-0.75 C
1979
7.0 C
+0.26 C
1980
5.9 C
-0.84 C
1981
7.2 C
+0.47 C
1982
6.3 C
-0.41 C
1983
7.6 C
+0.85 C
The annual mean temperature here has fallen by 0.19 C (0.01 to 0.36) per decade over 1945 to 1983. In Fahrenheit: 0.33 F (0.03 to 0.65) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Shearwater A
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.19 C (-0.36 to -0.01) per decade
-0.33 F (-0.65 to -0.03) per decade
1945 to 1983
39
Fall
Mean daily maximum
-0.15 C (-0.31 to 0.01) per decade
-0.27 F (-0.56 to 0.01) per decade
1945 to 1983
39
Not clearly different from zero
Mean daily minimum
-0.22 C (-0.42 to -0.02) per decade
-0.40 F (-0.76 to -0.03) per decade
1945 to 1983
39
Fall
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
1944 to 1983
Yearly extremes at Shearwater A: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
33.3 C (91.9 F)
1945
30.2 C (86.4 F)
40
Coldest night (TNn)
-26.1 C (-15.0 F)
1951
-21.7 C (-7.1 F)
40
Wettest day (Rx1day)
184.9 mm (7.3 in)
1971
63.9 mm (2.5 in)
40
Wettest five days (Rx5day)
239.5 mm (9.4 in)
1971
101.5 mm (4.0 in)
40
Longest dry spell (CDD)
30 days
1975
15 days
40
Hottest day (TXx)
The hottest day of the year at Shearwater A, 1944 to 1983. The record is 33.3 C (91.9 F) in 1945, marked on the chart; the median year is 30.2 C (86.4 F).
Hottest day (TXx) at Shearwater A by year
Year
Hottest day (TXx)
1944
31.7 C (89.1 F)
1945
33.3 C (91.9 F)
1946
31.7 C (89.1 F)
1947
31.1 C (88.0 F)
1948
29.4 C (84.9 F)
1949
31.1 C (88.0 F)
1950
29.4 C (84.9 F)
1951
28.9 C (84.0 F)
1952
30.6 C (87.1 F)
1953
29.4 C (84.9 F)
1954
28.3 C (82.9 F)
1955
30.6 C (87.1 F)
1956
28.9 C (84.0 F)
1957
31.1 C (88.0 F)
1958
27.8 C (82.0 F)
1959
28.9 C (84.0 F)
1960
28.9 C (84.0 F)
1961
30.0 C (86.0 F)
1962
27.8 C (82.0 F)
1963
33.3 C (91.9 F)
1964
28.3 C (82.9 F)
1965
28.3 C (82.9 F)
1966
27.8 C (82.0 F)
1967
27.8 C (82.0 F)
1968
32.2 C (90.0 F)
1969
31.1 C (88.0 F)
1970
30.0 C (86.0 F)
1971
28.3 C (82.9 F)
1972
27.8 C (82.0 F)
1973
31.7 C (89.1 F)
1974
28.9 C (84.0 F)
1975
32.2 C (90.0 F)
1976
31.7 C (89.1 F)
1977
32.0 C (89.6 F)
1978
30.8 C (87.4 F)
1979
30.4 C (86.7 F)
1980
30.5 C (86.9 F)
1981
30.4 C (86.7 F)
1982
28.7 C (83.7 F)
1983
33.0 C (91.4 F)
Coldest night (TNn)
The coldest night of the year at Shearwater A, 1944 to 1983. The record is -26.1 C (-15.0 F) in 1951, marked on the chart; the median year is -21.7 C (-7.1 F).
Coldest night (TNn) at Shearwater A by year
Year
Coldest night (TNn)
1944
-16.1 C (3.0 F)
1945
-18.9 C (-2.0 F)
1946
-22.8 C (-9.0 F)
1947
-17.8 C (0.0 F)
1948
-23.9 C (-11.0 F)
1949
-18.3 C (-0.9 F)
1950
-23.9 C (-11.0 F)
1951
-26.1 C (-15.0 F)
1952
-18.3 C (-0.9 F)
1953
-13.3 C (8.1 F)
1954
-21.7 C (-7.1 F)
1955
-25.6 C (-14.1 F)
1956
-17.2 C (1.0 F)
1957
-25.6 C (-14.1 F)
1958
-18.9 C (-2.0 F)
1959
-22.2 C (-8.0 F)
1960
-20.6 C (-5.1 F)
1961
-21.7 C (-7.1 F)
1962
-21.7 C (-7.1 F)
1963
-18.9 C (-2.0 F)
1964
-18.9 C (-2.0 F)
1965
-20.6 C (-5.1 F)
1966
-23.9 C (-11.0 F)
1967
-23.3 C (-9.9 F)
1968
-23.9 C (-11.0 F)
1969
-15.6 C (3.9 F)
1970
-18.9 C (-2.0 F)
1971
-25.0 C (-13.0 F)
1972
-22.2 C (-8.0 F)
1973
-21.7 C (-7.1 F)
1974
-22.8 C (-9.0 F)
1975
-23.3 C (-9.9 F)
1976
-20.0 C (-4.0 F)
1977
-19.4 C (-2.9 F)
1978
-17.3 C (0.9 F)
1979
-22.4 C (-8.3 F)
1980
-21.5 C (-6.7 F)
1981
-23.5 C (-10.3 F)
1982
-25.0 C (-13.0 F)
1983
-18.7 C (-1.7 F)
Wettest day (Rx1day)
The wettest day of the year at Shearwater A, 1944 to 1983. The record is 184.9 mm (7.3 in) in 1971, marked on the chart; the median year is 63.9 mm (2.5 in).
Wettest day (Rx1day) at Shearwater A by year
Year
Wettest day (Rx1day)
1944
80.0 mm (3.1 in)
1945
62.5 mm (2.5 in)
1946
111.3 mm (4.4 in)
1947
91.4 mm (3.6 in)
1948
84.3 mm (3.3 in)
1949
61.7 mm (2.4 in)
1950
53.1 mm (2.1 in)
1951
43.9 mm (1.7 in)
1952
63.8 mm (2.5 in)
1953
65.3 mm (2.6 in)
1954
131.6 mm (5.2 in)
1955
51.8 mm (2.0 in)
1956
39.1 mm (1.5 in)
1957
43.2 mm (1.7 in)
1958
87.9 mm (3.5 in)
1959
69.1 mm (2.7 in)
1960
38.9 mm (1.5 in)
1961
60.5 mm (2.4 in)
1962
57.4 mm (2.3 in)
1963
67.6 mm (2.7 in)
1964
75.2 mm (3.0 in)
1965
55.9 mm (2.2 in)
1966
41.1 mm (1.6 in)
1967
78.2 mm (3.1 in)
1968
61.2 mm (2.4 in)
1969
66.5 mm (2.6 in)
1970
64.0 mm (2.5 in)
1971
184.9 mm (7.3 in)
1972
70.4 mm (2.8 in)
1973
53.8 mm (2.1 in)
1974
47.2 mm (1.9 in)
1975
70.6 mm (2.8 in)
1976
84.6 mm (3.3 in)
1977
50.0 mm (2.0 in)
1978
59.4 mm (2.3 in)
1979
75.8 mm (3.0 in)
1980
48.9 mm (1.9 in)
1981
58.1 mm (2.3 in)
1982
96.9 mm (3.8 in)
1983
90.7 mm (3.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Shearwater A, 1944 to 1983. The record is 239.5 mm (9.4 in) in 1971, marked on the chart; the median year is 101.5 mm (4.0 in).
Wettest five days (Rx5day) at Shearwater A by year
Year
Wettest five days (Rx5day)
1944
104.7 mm (4.1 in)
1945
107.9 mm (4.2 in)
1946
134.2 mm (5.3 in)
1947
145.0 mm (5.7 in)
1948
121.9 mm (4.8 in)
1949
84.8 mm (3.3 in)
1950
95.8 mm (3.8 in)
1951
94.6 mm (3.7 in)
1952
92.7 mm (3.6 in)
1953
118.4 mm (4.7 in)
1954
141.0 mm (5.6 in)
1955
83.1 mm (3.3 in)
1956
114.1 mm (4.5 in)
1957
87.4 mm (3.4 in)
1958
121.9 mm (4.8 in)
1959
133.7 mm (5.3 in)
1960
111.1 mm (4.4 in)
1961
99.3 mm (3.9 in)
1962
79.0 mm (3.1 in)
1963
73.4 mm (2.9 in)
1964
103.9 mm (4.1 in)
1965
78.0 mm (3.1 in)
1966
58.9 mm (2.3 in)
1967
129.3 mm (5.1 in)
1968
87.9 mm (3.5 in)
1969
100.3 mm (3.9 in)
1970
79.8 mm (3.1 in)
1971
239.5 mm (9.4 in)
1972
89.5 mm (3.5 in)
1973
87.7 mm (3.5 in)
1974
89.6 mm (3.5 in)
1975
92.0 mm (3.6 in)
1976
106.4 mm (4.2 in)
1977
75.3 mm (3.0 in)
1978
132.0 mm (5.2 in)
1979
112.9 mm (4.4 in)
1980
63.8 mm (2.5 in)
1981
102.7 mm (4.0 in)
1982
127.1 mm (5.0 in)
1983
129.3 mm (5.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Shearwater A, 1944 to 1983. The record is 30 days in 1975, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Shearwater A by year
Year
Longest dry spell (CDD)
1944
28 days
1945
11 days
1946
13 days
1947
26 days
1948
10 days
1949
15 days
1950
18 days
1951
13 days
1952
11 days
1953
15 days
1954
17 days
1955
9 days
1956
15 days
1957
12 days
1958
9 days
1959
9 days
1960
22 days
1961
10 days
1962
11 days
1963
15 days
1964
21 days
1965
14 days
1966
17 days
1967
12 days
1968
15 days
1969
17 days
1970
13 days
1971
17 days
1972
11 days
1973
15 days
1974
15 days
1975
30 days
1976
14 days
1977
15 days
1978
14 days
1979
11 days
1980
23 days
1981
19 days
1982
17 days
1983
20 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
39 years with a frost
Across 39 years with a frost, the median last spring frost at Shearwater A falls on 4 May and the median first autumn frost on 21 October, which leaves a median of 173 days between them.
Fitted over all years, the growing season changes by -1.3 days per decade at this station.
Frost dates and growing season at Shearwater A
Measure
Median, all years
Earliest period
Recent period (1954 to 1983)
Recent against earliest
Fitted trend
Last spring frost
4 May
n/a
4 May
n/a
-0.4 days per decade
First autumn frost
21 October
n/a
21 October
n/a
-1.8 days per decade
Growing days
173 days
n/a
173 days
n/a
-1.3 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
39 years, 1945 to 1983
A day with at least 62.7 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 175.4 mm (6.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Shearwater A: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
62.7 mm (2.5 in)
5 years
83.9 mm (3.3 in)
10 years
101.0 mm (4.0 in)
25 years
126.7 mm (5.0 in)
50 years
149.4 mm (5.9 in)
Longer than the 39 years of record
100 years
175.4 mm (6.9 in)
Longer than the 39 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, 39 years of values from 1945 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: 184.9 mm (7.3 in) in 1971; 131.6 mm (5.2 in) in 1954; 111.3 mm (4.4 in) in 1946.
Download the Data
Data for Shearwater A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Shearwater A 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.