Record envelope, standing records and threshold days for Alert Bay (CA001020270), British Columbia, Canada, with 94 years of record.
Key Facts for Alert Bay
Alert Bay (CA001020270) is a weather station in British Columbia, Canada at 50.58 latitude and -126.93 longitude, 59 m (194 ft) above sea level.
The station reports from 1913 to 2006, 94 years of record.
1,464 records set at Alert Bay still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Alert Bay set a daily record low minimum temperature of -6.0 C (21.2 F) on 24 December 1983.
About the Station
Location: British Columbia, Canada, 50.58 latitude, -126.93 longitude.
Elevation: 59 m (194 ft).
Period of record: 1913 to 2006, 94 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 Alert Bay. 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 Alert Bay, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.9 C (57.0 F)
-11.1 C (12.0 F)
n/a
n/a
Feb
16.7 C (62.1 F)
-8.9 C (16.0 F)
n/a
n/a
Mar
18.7 C (65.7 F)
-7.8 C (18.0 F)
n/a
n/a
Apr
22.1 C (71.8 F)
-1.7 C (28.9 F)
n/a
n/a
May
30.1 C (86.2 F)
0.0 C (32.0 F)
n/a
n/a
Jun
30.0 C (86.0 F)
2.2 C (36.0 F)
n/a
n/a
Jul
29.4 C (84.9 F)
3.3 C (37.9 F)
n/a
n/a
Aug
33.3 C (91.9 F)
5.6 C (42.1 F)
n/a
n/a
Sep
26.7 C (80.1 F)
1.1 C (34.0 F)
n/a
n/a
Oct
23.1 C (73.6 F)
-3.9 C (25.0 F)
n/a
n/a
Nov
17.8 C (64.0 F)
-7.8 C (18.0 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-13.3 C (8.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Alert Bay still stand. 1914 holds the most, with 122.
Standing records at Alert Bay by the year they were set
Year set
Standing records
1913
18
1914
122
1915
91
1916
56
1917
21
1952
40
1953
37
1954
47
1955
69
1956
63
1957
23
1958
44
1959
30
1960
31
1961
30
1962
34
1963
33
1964
30
1965
40
1966
20
1967
24
1968
36
1969
33
1970
39
1971
41
1972
49
1973
37
1974
28
1975
35
1976
31
1977
32
1978
14
1979
30
1980
45
1981
37
1982
42
1983
32
All-Time Record Progression
1 new records
1 all-time records were set at Alert Bay between 12 November 1975 and 12 November 1975. Each dot is a new record.
When Alert Bay set new all-time records
Date
Kind
Detail
1975-11-12
Record daily precipitation
Record daily precipitation 116.1 mm (4.6 in)
Wettest Day of Each Month
Nov: 116.1 mm (4.6 in)
The wettest day on record for each calendar month at Alert Bay. The most was 116.1 mm (4.6 in) on 12 November 1975.
Record daily precipitation for each month at Alert Bay
Month
Record daily precipitation (mm)
Date
Jan
105.2 mm (4.1 in)
17 January 1946
Feb
94.0 mm (3.7 in)
11 February 1983
Mar
69.6 mm (2.7 in)
23 March 1943
Apr
56.6 mm (2.2 in)
25 April 1939
May
41.9 mm (1.6 in)
7 May 1967
Jun
59.2 mm (2.3 in)
14 June 1976
Jul
55.4 mm (2.2 in)
8 July 1963
Aug
49.3 mm (1.9 in)
20 August 1967
Sep
90.2 mm (3.6 in)
30 September 1962
Oct
102.4 mm (4.0 in)
22 October 1977
Nov
116.1 mm (4.6 in)
12 November 1975
Dec
100.3 mm (3.9 in)
8 December 1930
Period of Record Coverage
1913 to 1983
Complete yearUnder 90 percent of days
37 years of record at Alert Bay, 1913 to 1983. 3 years have data for under 90 percent of days and are left out of rankings: 1913, 1917, 1952.
Cooler than the station meanWarmer than the station mean
One stripe for each of 32 complete years at Alert Bay, 1914 to 1983. Blue stripes are years cooler than the station's own mean of 8.5 C (47.3 F); red stripes are warmer. The coolest year was 1955, at 7.6 C (45.6 F), and the warmest was 1958, at 9.9 C (49.7 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Alert Bay as warming stripes, 1914 to 1983
Year
Annual mean temperature
Difference from the station mean
1914
9.6 C
+1.04 C
1916
8.1 C
-0.41 C
1953
9.1 C
+0.59 C
1954
8.4 C
-0.10 C
1955
7.6 C
-0.95 C
1956
8.2 C
-0.28 C
1957
8.5 C
-0.01 C
1958
9.9 C
+1.34 C
1959
8.7 C
+0.23 C
1960
8.6 C
+0.09 C
1961
8.9 C
+0.40 C
1962
8.6 C
+0.12 C
1963
9.3 C
+0.76 C
1964
8.0 C
-0.56 C
1965
8.3 C
-0.19 C
1966
8.7 C
+0.21 C
1967
9.1 C
+0.55 C
1968
8.6 C
+0.09 C
1969
8.6 C
+0.04 C
1970
8.6 C
+0.05 C
1971
7.7 C
-0.86 C
1972
7.7 C
-0.86 C
1973
8.2 C
-0.33 C
1974
8.5 C
-0.02 C
1975
7.8 C
-0.74 C
1976
8.5 C
-0.01 C
1977
8.3 C
-0.19 C
1978
8.4 C
-0.14 C
1980
8.9 C
+0.35 C
1981
9.0 C
+0.53 C
1982
7.6 C
-0.93 C
1983
8.6 C
+0.06 C
The fitted trend in annual mean temperature here over 1914 to 1983 is -0.09 C (-0.21 to 0.04) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.4 to 0.1) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Alert Bay
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.09 C (-0.21 to 0.04) per decade
-0.2 F (-0.4 to 0.1) per decade
1914 to 1983
32
Not clearly different from zero
Mean daily maximum
0.05 C (-0.08 to 0.18) per decade
0.1 F (-0.2 to 0.3) per decade
1914 to 1983
32
Not clearly different from zero
Mean daily minimum
-0.2 C (-0.4 to -0.1) per decade
-0.4 F (-0.6 to -0.2) per decade
1914 to 1983
32
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
1913 to 1983
Yearly extremes at Alert Bay: 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)
1960
27.2 C (81.0 F)
37
Coldest night (TNn)
-13.3 C (8.1 F)
1968
-5.6 C (21.9 F)
37
Wettest day (Rx1day)
116.1 mm (4.6 in)
1975
60.7 mm (2.4 in)
65
Wettest five days (Rx5day)
272.2 mm (10.7 in)
1975
119.3 mm (4.7 in)
65
Longest dry spell (CDD)
43 days
1981
19 days
65
Hottest day (TXx)
The hottest day of the year at Alert Bay, 1913 to 1983. The record is 33.3 C (91.9 F) in 1960, marked on the chart; the median year is 27.2 C (81.0 F).
Hottest day (TXx) at Alert Bay by year
Year
Hottest day (TXx)
1913
14.4 C (57.9 F)
1914
25.6 C (78.1 F)
1915
25.6 C (78.1 F)
1916
22.8 C (73.0 F)
1917
10.6 C (51.1 F)
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
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
24.4 C (75.9 F)
1953
24.4 C (75.9 F)
1954
25.0 C (77.0 F)
1955
30.0 C (86.0 F)
1956
29.4 C (84.9 F)
1957
27.8 C (82.0 F)
1958
27.8 C (82.0 F)
1959
23.9 C (75.0 F)
1960
33.3 C (91.9 F)
1961
25.6 C (78.1 F)
1962
25.6 C (78.1 F)
1963
28.9 C (84.0 F)
1964
22.2 C (72.0 F)
1965
28.9 C (84.0 F)
1966
27.2 C (81.0 F)
1967
28.3 C (82.9 F)
1968
28.9 C (84.0 F)
1969
27.8 C (82.0 F)
1970
29.4 C (84.9 F)
1971
27.8 C (82.0 F)
1972
29.4 C (84.9 F)
1973
26.7 C (80.1 F)
1974
27.2 C (81.0 F)
1975
24.4 C (75.9 F)
1976
25.0 C (77.0 F)
1977
25.7 C (78.3 F)
1978
27.5 C (81.5 F)
1979
26.0 C (78.8 F)
1980
27.4 C (81.3 F)
1981
26.2 C (79.2 F)
1982
28.0 C (82.4 F)
1983
30.1 C (86.2 F)
Coldest night (TNn)
The coldest night of the year at Alert Bay, 1913 to 1983. The record is -13.3 C (8.1 F) in 1968, marked on the chart; the median year is -5.6 C (21.9 F).
Coldest night (TNn) at Alert Bay by year
Year
Coldest night (TNn)
1913
0.0 C (32.0 F)
1914
-3.3 C (26.1 F)
1915
-2.2 C (28.0 F)
1916
-9.4 C (15.1 F)
1917
-11.1 C (12.0 F)
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
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
-5.0 C (23.0 F)
1953
-5.0 C (23.0 F)
1954
-10.0 C (14.0 F)
1955
-7.8 C (18.0 F)
1956
-8.9 C (16.0 F)
1957
-8.9 C (16.0 F)
1958
-2.8 C (27.0 F)
1959
-7.2 C (19.0 F)
1960
-3.3 C (26.1 F)
1961
-1.7 C (28.9 F)
1962
-5.6 C (21.9 F)
1963
-3.9 C (25.0 F)
1964
-10.0 C (14.0 F)
1965
-5.6 C (21.9 F)
1966
-4.4 C (24.1 F)
1967
-5.0 C (23.0 F)
1968
-13.3 C (8.1 F)
1969
-11.1 C (12.0 F)
1970
-5.6 C (21.9 F)
1971
-10.0 C (14.0 F)
1972
-8.3 C (17.1 F)
1973
-5.6 C (21.9 F)
1974
-5.0 C (23.0 F)
1975
-5.0 C (23.0 F)
1976
-3.9 C (25.0 F)
1977
-5.1 C (22.8 F)
1978
-8.3 C (17.1 F)
1979
-5.0 C (23.0 F)
1980
-7.0 C (19.4 F)
1981
-3.3 C (26.1 F)
1982
-7.9 C (17.8 F)
1983
-8.3 C (17.1 F)
Wettest day (Rx1day)
The wettest day of the year at Alert Bay, 1913 to 1983. The record is 116.1 mm (4.6 in) in 1975, marked on the chart; the median year is 60.7 mm (2.4 in).
Wettest day (Rx1day) at Alert Bay by year
Year
Wettest day (Rx1day)
1913
38.9 mm (1.5 in)
1914
60.2 mm (2.4 in)
1915
60.7 mm (2.4 in)
1916
63.0 mm (2.5 in)
1917
30.0 mm (1.2 in)
1924
52.1 mm (2.1 in)
1925
38.1 mm (1.5 in)
1926
64.8 mm (2.6 in)
1927
39.4 mm (1.6 in)
1928
73.7 mm (2.9 in)
1929
63.5 mm (2.5 in)
1930
100.3 mm (3.9 in)
1931
42.9 mm (1.7 in)
1932
77.0 mm (3.0 in)
1933
49.5 mm (1.9 in)
1934
50.0 mm (2.0 in)
1935
56.6 mm (2.2 in)
1936
54.6 mm (2.1 in)
1937
46.2 mm (1.8 in)
1938
63.8 mm (2.5 in)
1939
68.1 mm (2.7 in)
1940
50.5 mm (2.0 in)
1941
62.5 mm (2.5 in)
1942
35.6 mm (1.4 in)
1943
69.6 mm (2.7 in)
1944
65.3 mm (2.6 in)
1945
39.9 mm (1.6 in)
1946
105.2 mm (4.1 in)
1947
86.1 mm (3.4 in)
1948
64.5 mm (2.5 in)
1949
33.5 mm (1.3 in)
1950
53.3 mm (2.1 in)
1951
44.5 mm (1.8 in)
1952
83.1 mm (3.3 in)
1953
44.7 mm (1.8 in)
1954
64.5 mm (2.5 in)
1955
45.7 mm (1.8 in)
1956
44.7 mm (1.8 in)
1957
84.3 mm (3.3 in)
1958
70.1 mm (2.8 in)
1959
67.8 mm (2.7 in)
1960
54.6 mm (2.1 in)
1961
43.4 mm (1.7 in)
1962
90.2 mm (3.6 in)
1963
84.3 mm (3.3 in)
1964
54.6 mm (2.1 in)
1965
47.0 mm (1.9 in)
1966
66.8 mm (2.6 in)
1967
49.3 mm (1.9 in)
1968
79.2 mm (3.1 in)
1969
57.2 mm (2.3 in)
1970
50.5 mm (2.0 in)
1971
83.8 mm (3.3 in)
1972
40.4 mm (1.6 in)
1973
85.1 mm (3.4 in)
1974
57.9 mm (2.3 in)
1975
116.1 mm (4.6 in)
1976
59.2 mm (2.3 in)
1977
102.4 mm (4.0 in)
1978
49.4 mm (1.9 in)
1979
60.7 mm (2.4 in)
1980
72.7 mm (2.9 in)
1981
63.2 mm (2.5 in)
1982
61.5 mm (2.4 in)
1983
94.0 mm (3.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Alert Bay, 1913 to 1983. The record is 272.2 mm (10.7 in) in 1975, marked on the chart; the median year is 119.3 mm (4.7 in).
Wettest five days (Rx5day) at Alert Bay by year
Year
Wettest five days (Rx5day)
1913
51.9 mm (2.0 in)
1914
103.4 mm (4.1 in)
1915
119.3 mm (4.7 in)
1916
103.1 mm (4.1 in)
1917
78.2 mm (3.1 in)
1924
127.0 mm (5.0 in)
1925
98.3 mm (3.9 in)
1926
217.1 mm (8.5 in)
1927
204.4 mm (8.0 in)
1928
133.7 mm (5.3 in)
1929
112.7 mm (4.4 in)
1930
154.9 mm (6.1 in)
1931
67.9 mm (2.7 in)
1932
155.8 mm (6.1 in)
1933
113.0 mm (4.4 in)
1934
84.3 mm (3.3 in)
1935
109.2 mm (4.3 in)
1936
101.6 mm (4.0 in)
1937
100.1 mm (3.9 in)
1938
114.0 mm (4.5 in)
1939
187.3 mm (7.4 in)
1940
159.5 mm (6.3 in)
1941
175.6 mm (6.9 in)
1942
84.9 mm (3.3 in)
1943
99.3 mm (3.9 in)
1944
149.7 mm (5.9 in)
1945
93.8 mm (3.7 in)
1946
166.4 mm (6.6 in)
1947
157.7 mm (6.2 in)
1948
105.6 mm (4.2 in)
1949
83.3 mm (3.3 in)
1950
113.4 mm (4.5 in)
1951
117.0 mm (4.6 in)
1952
155.0 mm (6.1 in)
1953
118.6 mm (4.7 in)
1954
157.4 mm (6.2 in)
1955
99.6 mm (3.9 in)
1956
76.4 mm (3.0 in)
1957
121.1 mm (4.8 in)
1958
131.7 mm (5.2 in)
1959
96.5 mm (3.8 in)
1960
145.3 mm (5.7 in)
1961
106.9 mm (4.2 in)
1962
191.6 mm (7.5 in)
1963
174.9 mm (6.9 in)
1964
92.5 mm (3.6 in)
1965
128.3 mm (5.1 in)
1966
121.9 mm (4.8 in)
1967
171.9 mm (6.8 in)
1968
171.4 mm (6.7 in)
1969
117.2 mm (4.6 in)
1970
80.5 mm (3.2 in)
1971
195.8 mm (7.7 in)
1972
98.5 mm (3.9 in)
1973
139.5 mm (5.5 in)
1974
122.5 mm (4.8 in)
1975
272.2 mm (10.7 in)
1976
104.9 mm (4.1 in)
1977
173.3 mm (6.8 in)
1978
77.5 mm (3.1 in)
1979
99.9 mm (3.9 in)
1980
124.4 mm (4.9 in)
1981
132.4 mm (5.2 in)
1982
148.7 mm (5.9 in)
1983
127.3 mm (5.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Alert Bay, 1913 to 1983. The record is 43 days in 1981, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Alert Bay by year
Year
Longest dry spell (CDD)
1913
6 days
1914
29 days
1915
17 days
1916
38 days
1917
10 days
1924
32 days
1925
39 days
1926
19 days
1927
25 days
1928
23 days
1929
32 days
1930
27 days
1931
28 days
1932
24 days
1933
15 days
1934
30 days
1935
21 days
1936
11 days
1937
18 days
1938
29 days
1939
15 days
1940
18 days
1941
19 days
1942
34 days
1943
17 days
1944
16 days
1945
19 days
1946
28 days
1947
15 days
1948
14 days
1949
15 days
1950
18 days
1951
23 days
1952
28 days
1953
14 days
1954
16 days
1955
10 days
1956
15 days
1957
18 days
1958
30 days
1959
11 days
1960
29 days
1961
29 days
1962
19 days
1963
16 days
1964
14 days
1965
22 days
1966
14 days
1967
16 days
1968
21 days
1969
21 days
1970
21 days
1971
24 days
1972
35 days
1973
11 days
1974
30 days
1975
15 days
1976
9 days
1977
22 days
1978
29 days
1979
13 days
1980
13 days
1981
43 days
1982
22 days
1983
14 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
30 years with a frost
Across 30 years with a frost, the median last spring frost at Alert Bay falls on 28 March and the median first autumn frost on 17 November, which leaves a median of 231 days between them.
Fitted over all years, the growing season changes by +1.9 days per decade at this station.
Frost dates and growing season at Alert Bay
Measure
Median, all years
Earliest period
Recent period (1914 to 1983)
Recent against earliest
Fitted trend
Last spring frost
28 March
n/a
28 March
n/a
+0.2 days per decade
First autumn frost
17 November
n/a
17 November
n/a
+2.1 days per decade
Growing days
231 days
n/a
231 days
n/a
+1.9 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
62 years, 1914 to 1983
A day with at least 59.5 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 122.5 mm (4.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Alert Bay: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
59.5 mm (2.3 in)
5 years
76.3 mm (3.0 in)
10 years
87.4 mm (3.4 in)
25 years
101.6 mm (4.0 in)
50 years
112.1 mm (4.4 in)
100 years
122.5 mm (4.8 in)
Longer than the 62 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, 62 years of values from 1914 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: 116.1 mm (4.6 in) in 1975; 105.2 mm (4.1 in) in 1946; 102.4 mm (4.0 in) in 1977.
Download the Data
Data for Alert Bay standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alert Bay 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.