Record envelope, standing records and threshold days for Port Alberni (CA001036205), British Columbia, Canada, with 44 years of record.
Key Facts for Port Alberni
Port Alberni (CA001036205) is a weather station in British Columbia, Canada at 49.23 latitude and -124.80 longitude, 59 m (194 ft) above sea level.
The station reports from 1917 to 1960, 44 years of record.
1,464 records set at Port Alberni still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Port Alberni set a daily record high minimum temperature of 11.7 C (53.1 F) on 23 October 1960.
About the Station
Location: British Columbia, Canada, 49.23 latitude, -124.80 longitude.
Elevation: 59 m (194 ft).
Period of record: 1917 to 1960, 44 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 Port Alberni. 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 Port Alberni, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.6 C (60.1 F)
-18.9 C (-2.0 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-15.6 C (3.9 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-13.9 C (7.0 F)
n/a
n/a
Apr
30.6 C (87.1 F)
-7.8 C (18.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
37.2 C (99.0 F)
0.0 C (32.0 F)
n/a
n/a
Jul
41.1 C (106.0 F)
3.3 C (37.9 F)
n/a
n/a
Aug
39.4 C (102.9 F)
2.8 C (37.0 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
27.8 C (82.0 F)
-7.8 C (18.0 F)
n/a
n/a
Nov
20.6 C (69.1 F)
-12.8 C (9.0 F)
n/a
n/a
Dec
16.7 C (62.1 F)
-15.6 C (3.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Port Alberni still stand. 1934 holds the most, with 68.
Standing records at Port Alberni by the year they were set
Year set
Standing records
1917
24
1918
44
1919
60
1920
43
1921
38
1922
30
1923
35
1924
43
1925
36
1926
53
1927
20
1928
29
1929
26
1930
33
1931
29
1932
42
1933
36
1934
68
1935
44
1936
48
1937
19
1938
20
1939
40
1940
24
1941
36
1942
21
1943
31
1944
30
1945
38
1946
36
1947
31
1948
16
1949
34
1950
53
1951
28
1952
19
1953
7
1954
24
1955
37
1956
38
1957
23
1958
47
1959
13
1960
18
All-Time Record Progression
5 new records
5 all-time records were set at Port Alberni between 13 January 1950 and 30 November 1958. Each dot is a new record.
When Port Alberni set new all-time records
Date
Kind
Detail
1950-01-13
Record low maximum temperature
Record low maximum temperature -11.1 C (12.0 F)
1950-01-15
Record low minimum temperature
Record low minimum temperature -17.2 C (1.0 F)
1950-01-25
Record low minimum temperature
Record low minimum temperature -18.3 C (-0.9 F)
1950-01-31
Record low minimum temperature
Record low minimum temperature -18.9 C (-2.0 F)
1958-11-30
Record daily precipitation
Record daily precipitation 139.7 mm (5.5 in)
Wettest Day of Each Month
Nov: 139.7 mm (5.5 in)
The wettest day on record for each calendar month at Port Alberni. The most was 139.7 mm (5.5 in) on 30 November 1958.
Record daily precipitation for each month at Port Alberni
Month
Record daily precipitation (mm)
Date
Jan
105.7 mm (4.2 in)
24 January 1951
Feb
123.4 mm (4.9 in)
8 February 1918
Mar
105.2 mm (4.1 in)
18 March 1945
Apr
76.2 mm (3.0 in)
10 April 1950
May
63.0 mm (2.5 in)
10 May 1945
Jun
47.8 mm (1.9 in)
7 June 1956
Jul
70.4 mm (2.8 in)
20 July 1945
Aug
38.9 mm (1.5 in)
23 August 1950
Sep
57.7 mm (2.3 in)
27 September 1927
Oct
91.2 mm (3.6 in)
24 October 1950
Nov
139.7 mm (5.5 in)
30 November 1958
Dec
125.7 mm (4.9 in)
31 December 1926
Period of Record Coverage
1917 to 1960
Complete yearUnder 90 percent of days
44 years of record at Port Alberni, 1917 to 1960. 3 years have data for under 90 percent of days and are left out of rankings: 1917, 1953, 1960.
Cooler than the station meanWarmer than the station mean
One stripe for each of 39 complete years at Port Alberni, 1918 to 1959. Blue stripes are years cooler than the station's own mean of 9.6 C (49.3 F); red stripes are warmer. The coolest year was 1955, at 8.0 C (46.5 F), and the warmest was 1934, at 11.7 C (53.0 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Port Alberni as warming stripes, 1918 to 1959
Year
Annual mean temperature
Difference from the station mean
1918
9.9 C
+0.29 C
1919
9.2 C
-0.47 C
1920
9.2 C
-0.45 C
1921
8.9 C
-0.72 C
1922
9.0 C
-0.64 C
1923
10.0 C
+0.36 C
1924
9.8 C
+0.18 C
1925
10.6 C
+0.94 C
1926
10.9 C
+1.23 C
1927
9.4 C
-0.20 C
1928
10.3 C
+0.62 C
1929
9.4 C
-0.26 C
1930
9.5 C
-0.13 C
1931
10.7 C
+1.02 C
1932
10.7 C
+1.04 C
1933
10.2 C
+0.54 C
1934
11.7 C
+2.05 C
1935
10.1 C
+0.41 C
1936
10.2 C
+0.59 C
1937
9.8 C
+0.20 C
1938
10.4 C
+0.76 C
1939
11.2 C
+1.54 C
1940
11.1 C
+1.44 C
1942
9.2 C
-0.43 C
1943
9.1 C
-0.53 C
1944
9.4 C
-0.27 C
1945
9.2 C
-0.46 C
1946
8.5 C
-1.16 C
1947
9.2 C
-0.47 C
1948
8.7 C
-0.96 C
1949
8.7 C
-0.92 C
1950
8.3 C
-1.39 C
1951
9.0 C
-0.62 C
1952
9.1 C
-0.57 C
1955
8.0 C
-1.60 C
1956
8.8 C
-0.82 C
1957
8.9 C
-0.77 C
1958
10.7 C
+1.09 C
1959
9.1 C
-0.58 C
The annual mean temperature here has fallen by 0.26 C (0.04 to 0.48) per decade over 1918 to 1959. In Fahrenheit: 0.5 F (0.1 to 0.9) 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 Port Alberni
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.26 C (-0.48 to -0.04) per decade
-0.5 F (-0.9 to -0.1) per decade
1918 to 1959
39
Fall
Mean daily maximum
-0.4 C (-0.6 to -0.1) per decade
-0.6 F (-1.1 to -0.2) per decade
1918 to 1959
39
Fall
Mean daily minimum
-0.2 C (-0.4 to 0.1) per decade
-0.3 F (-0.7 to 0.2) per decade
1918 to 1959
39
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
1917 to 1960
Yearly extremes at Port Alberni: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
1941
35.6 C (96.1 F)
44
Coldest night (TNn)
-18.9 C (-2.0 F)
1950
-11.1 C (12.0 F)
44
Wettest day (Rx1day)
139.7 mm (5.5 in)
1958
71.6 mm (2.8 in)
44
Wettest five days (Rx5day)
326.7 mm (12.9 in)
1927
169.5 mm (6.7 in)
44
Longest dry spell (CDD)
55 days
1960
28 days
44
Hottest day (TXx)
The hottest day of the year at Port Alberni, 1917 to 1960. The record is 41.1 C (106.0 F) in 1941, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Port Alberni by year
Year
Hottest day (TXx)
1917
32.8 C (91.0 F)
1918
31.7 C (89.1 F)
1919
33.3 C (91.9 F)
1920
35.0 C (95.0 F)
1921
32.2 C (90.0 F)
1922
35.0 C (95.0 F)
1923
34.4 C (93.9 F)
1924
36.7 C (98.1 F)
1925
37.8 C (100.0 F)
1926
37.2 C (99.0 F)
1927
37.2 C (99.0 F)
1928
36.7 C (98.1 F)
1929
32.8 C (91.0 F)
1930
34.4 C (93.9 F)
1931
36.7 C (98.1 F)
1932
35.6 C (96.1 F)
1933
39.4 C (102.9 F)
1934
36.1 C (97.0 F)
1935
35.6 C (96.1 F)
1936
32.8 C (91.0 F)
1937
35.6 C (96.1 F)
1938
35.6 C (96.1 F)
1939
37.2 C (99.0 F)
1940
35.0 C (95.0 F)
1941
41.1 C (106.0 F)
1942
38.9 C (102.0 F)
1943
34.4 C (93.9 F)
1944
37.8 C (100.0 F)
1945
36.1 C (97.0 F)
1946
33.9 C (93.0 F)
1947
33.3 C (91.9 F)
1948
35.6 C (96.1 F)
1949
33.3 C (91.9 F)
1950
33.9 C (93.0 F)
1951
36.1 C (97.0 F)
1952
36.1 C (97.0 F)
1953
32.8 C (91.0 F)
1954
28.3 C (82.9 F)
1955
32.8 C (91.0 F)
1956
35.6 C (96.1 F)
1957
29.4 C (84.9 F)
1958
37.2 C (99.0 F)
1959
33.9 C (93.0 F)
1960
35.6 C (96.1 F)
Coldest night (TNn)
The coldest night of the year at Port Alberni, 1917 to 1960. The record is -18.9 C (-2.0 F) in 1950, marked on the chart; the median year is -11.1 C (12.0 F).
Coldest night (TNn) at Port Alberni by year
Year
Coldest night (TNn)
1917
-8.9 C (16.0 F)
1918
-8.3 C (17.1 F)
1919
-15.6 C (3.9 F)
1920
-9.4 C (15.1 F)
1921
-10.6 C (12.9 F)
1922
-15.6 C (3.9 F)
1923
-11.7 C (10.9 F)
1924
-13.9 C (7.0 F)
1925
-5.6 C (21.9 F)
1926
-11.1 C (12.0 F)
1927
-11.1 C (12.0 F)
1928
-6.1 C (21.0 F)
1929
-15.0 C (5.0 F)
1930
-13.3 C (8.1 F)
1931
-5.0 C (23.0 F)
1932
-12.8 C (9.0 F)
1933
-12.2 C (10.0 F)
1934
-3.3 C (26.1 F)
1935
-16.7 C (1.9 F)
1936
-11.1 C (12.0 F)
1937
-11.1 C (12.0 F)
1938
-4.4 C (24.1 F)
1939
-5.0 C (23.0 F)
1940
-5.0 C (23.0 F)
1941
-10.6 C (12.9 F)
1942
-11.1 C (12.0 F)
1943
-12.8 C (9.0 F)
1944
-10.6 C (12.9 F)
1945
-6.7 C (19.9 F)
1946
-7.8 C (18.0 F)
1947
-16.7 C (1.9 F)
1948
-11.1 C (12.0 F)
1949
-13.9 C (7.0 F)
1950
-18.9 C (-2.0 F)
1951
-15.6 C (3.9 F)
1952
-9.4 C (15.1 F)
1953
-5.0 C (23.0 F)
1954
-12.2 C (10.0 F)
1955
-13.3 C (8.1 F)
1956
-11.1 C (12.0 F)
1957
-15.0 C (5.0 F)
1958
-6.1 C (21.0 F)
1959
-11.1 C (12.0 F)
1960
-7.2 C (19.0 F)
Wettest day (Rx1day)
The wettest day of the year at Port Alberni, 1917 to 1960. The record is 139.7 mm (5.5 in) in 1958, marked on the chart; the median year is 71.6 mm (2.8 in).
Wettest day (Rx1day) at Port Alberni by year
Year
Wettest day (Rx1day)
1917
64.3 mm (2.5 in)
1918
123.4 mm (4.9 in)
1919
62.5 mm (2.5 in)
1920
46.0 mm (1.8 in)
1921
48.8 mm (1.9 in)
1922
34.3 mm (1.4 in)
1923
71.1 mm (2.8 in)
1924
91.7 mm (3.6 in)
1925
78.2 mm (3.1 in)
1926
125.7 mm (4.9 in)
1927
82.0 mm (3.2 in)
1928
64.3 mm (2.5 in)
1929
80.3 mm (3.2 in)
1930
66.0 mm (2.6 in)
1931
71.1 mm (2.8 in)
1932
54.9 mm (2.2 in)
1933
54.6 mm (2.1 in)
1934
106.7 mm (4.2 in)
1935
67.8 mm (2.7 in)
1936
59.2 mm (2.3 in)
1937
58.4 mm (2.3 in)
1938
37.1 mm (1.5 in)
1939
62.2 mm (2.4 in)
1940
72.1 mm (2.8 in)
1941
43.2 mm (1.7 in)
1942
47.5 mm (1.9 in)
1943
36.1 mm (1.4 in)
1944
73.9 mm (2.9 in)
1945
105.2 mm (4.1 in)
1946
94.7 mm (3.7 in)
1947
117.3 mm (4.6 in)
1948
106.9 mm (4.2 in)
1949
98.3 mm (3.9 in)
1950
91.2 mm (3.6 in)
1951
105.7 mm (4.2 in)
1952
86.9 mm (3.4 in)
1953
74.2 mm (2.9 in)
1954
62.0 mm (2.4 in)
1955
79.5 mm (3.1 in)
1956
77.2 mm (3.0 in)
1957
44.2 mm (1.7 in)
1958
139.7 mm (5.5 in)
1959
69.6 mm (2.7 in)
1960
92.7 mm (3.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Port Alberni, 1917 to 1960. The record is 326.7 mm (12.9 in) in 1927, marked on the chart; the median year is 169.5 mm (6.7 in).
Wettest five days (Rx5day) at Port Alberni by year
Year
Wettest five days (Rx5day)
1917
152.7 mm (6.0 in)
1918
241.0 mm (9.5 in)
1919
194.6 mm (7.7 in)
1920
125.8 mm (5.0 in)
1921
165.9 mm (6.5 in)
1922
115.9 mm (4.6 in)
1923
171.9 mm (6.8 in)
1924
201.2 mm (7.9 in)
1925
173.3 mm (6.8 in)
1926
314.5 mm (12.4 in)
1927
326.7 mm (12.9 in)
1928
162.9 mm (6.4 in)
1929
197.6 mm (7.8 in)
1930
161.3 mm (6.4 in)
1931
190.0 mm (7.5 in)
1932
167.0 mm (6.6 in)
1933
160.2 mm (6.3 in)
1934
155.3 mm (6.1 in)
1935
232.2 mm (9.1 in)
1936
177.1 mm (7.0 in)
1937
134.4 mm (5.3 in)
1938
119.4 mm (4.7 in)
1939
183.6 mm (7.2 in)
1940
135.4 mm (5.3 in)
1941
142.9 mm (5.6 in)
1942
112.2 mm (4.4 in)
1943
121.7 mm (4.8 in)
1944
197.8 mm (7.8 in)
1945
238.3 mm (9.4 in)
1946
225.4 mm (8.9 in)
1947
228.7 mm (9.0 in)
1948
258.8 mm (10.2 in)
1949
244.4 mm (9.6 in)
1950
209.5 mm (8.2 in)
1951
206.1 mm (8.1 in)
1952
184.7 mm (7.3 in)
1953
134.6 mm (5.3 in)
1954
165.7 mm (6.5 in)
1955
150.1 mm (5.9 in)
1956
152.8 mm (6.0 in)
1957
132.6 mm (5.2 in)
1958
250.3 mm (9.9 in)
1959
165.4 mm (6.5 in)
1960
165.4 mm (6.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Port Alberni, 1917 to 1960. The record is 55 days in 1960, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Port Alberni by year
Year
Longest dry spell (CDD)
1917
21 days
1918
39 days
1919
32 days
1920
25 days
1921
33 days
1922
43 days
1923
41 days
1924
33 days
1925
39 days
1926
25 days
1927
31 days
1928
29 days
1929
23 days
1930
26 days
1931
24 days
1932
21 days
1933
26 days
1934
30 days
1935
27 days
1936
41 days
1937
25 days
1938
31 days
1939
39 days
1940
32 days
1941
17 days
1942
39 days
1943
23 days
1944
34 days
1945
28 days
1946
21 days
1947
24 days
1948
14 days
1949
23 days
1950
29 days
1951
28 days
1952
30 days
1953
27 days
1954
26 days
1955
24 days
1956
50 days
1957
19 days
1958
33 days
1959
17 days
1960
55 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 Port Alberni falls on 2 May and the median first autumn frost on 20 October, which leaves a median of 172 days between them.
Fitted over all years, the growing season changes by +2.6 days per decade at this station.
Frost dates and growing season at Port Alberni
Measure
Median, all years
Earliest period
Recent period (1927 to 1959)
Recent against earliest
Fitted trend
Last spring frost
2 May
n/a
1 May
n/a
-2.1 days per decade
First autumn frost
20 October
n/a
21 October
n/a
+0.4 days per decade
Growing days
172 days
n/a
174 days
n/a
+2.6 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
40 years, 1918 to 1958
A day with at least 72.5 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 153.3 mm (6.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Port Alberni: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
72.5 mm (2.9 in)
5 years
97.2 mm (3.8 in)
10 years
112.2 mm (4.4 in)
25 years
129.8 mm (5.1 in)
50 years
141.9 mm (5.6 in)
Longer than the 40 years of record
100 years
153.3 mm (6.0 in)
Longer than the 40 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, 40 years of values from 1918 to 1958.
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: 139.7 mm (5.5 in) in 1958; 125.7 mm (4.9 in) in 1926; 123.4 mm (4.9 in) in 1918.
Download the Data
Data for Port Alberni standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Port Alberni 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.