Record envelope, standing records and threshold days for Comox A (CA001021830), British Columbia, Canada, with 83 years of record.
Key Facts for Comox A
Comox A (CA001021830) is a weather station in British Columbia, Canada at 49.72 latitude and -124.90 longitude, 26 m (85 ft) above sea level.
The station reports from 1944 to 2026, 83 years of record.
1,464 records set at Comox A still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Comox A set a daily record snowfall of 6.9 cm (2.7 in) on 29 December 1983.
About the Station
Location: British Columbia, Canada, 49.72 latitude, -124.90 longitude.
Elevation: 26 m (85 ft).
Period of record: 1944 to 2026, 83 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 Comox 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 Comox A, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.7 C (62.1 F)
-21.1 C (-6.0 F)
n/a
n/a
Feb
15.5 C (59.9 F)
-16.1 C (3.0 F)
n/a
n/a
Mar
18.9 C (66.0 F)
-13.9 C (7.0 F)
n/a
n/a
Apr
23.9 C (75.0 F)
-4.4 C (24.1 F)
n/a
n/a
May
31.7 C (89.1 F)
-2.8 C (27.0 F)
n/a
n/a
Jun
34.4 C (93.9 F)
3.3 C (37.9 F)
n/a
n/a
Jul
34.4 C (93.9 F)
5.0 C (41.0 F)
n/a
n/a
Aug
33.6 C (92.5 F)
4.4 C (39.9 F)
n/a
n/a
Sep
30.6 C (87.1 F)
-1.7 C (28.9 F)
n/a
n/a
Oct
22.2 C (72.0 F)
-3.3 C (26.1 F)
n/a
n/a
Nov
17.8 C (64.0 F)
-10.0 C (14.0 F)
n/a
n/a
Dec
16.0 C (60.8 F)
-15.0 C (5.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Comox A still stand. 1958 holds the most, with 85.
Standing records at Comox A by the year they were set
Year set
Standing records
1944
41
1945
37
1946
24
1947
49
1948
41
1949
58
1950
64
1951
52
1952
43
1953
27
1954
35
1955
58
1956
41
1957
41
1958
85
1959
18
1960
28
1961
42
1962
35
1963
31
1964
27
1965
32
1966
28
1967
26
1968
28
1969
37
1970
26
1971
27
1972
44
1973
20
1974
28
1975
26
1976
34
1977
27
1978
23
1979
25
1980
49
1981
32
1982
31
1983
44
All-Time Record Progression
1 new records
1 all-time records were set at Comox A between 4 January 1978 and 4 January 1978. Each dot is a new record.
When Comox A set new all-time records
Date
Kind
Detail
1978-01-04
Record daily snowfall
Record daily snowfall 60.2 cm (23.7 in)
Wettest Day of Each Month
Dec: 113.0 mm (4.4 in)
The wettest day on record for each calendar month at Comox A. The most was 113.0 mm (4.4 in) on 22 December 1957.
Record daily precipitation for each month at Comox A
Month
Record daily precipitation (mm)
Date
Jan
77.0 mm (3.0 in)
18 January 1968
Feb
80.2 mm (3.2 in)
11 February 1983
Mar
56.6 mm (2.2 in)
9 March 1974
Apr
46.5 mm (1.8 in)
27 April 1962
May
29.2 mm (1.1 in)
23 May 1973
Jun
30.5 mm (1.2 in)
26 June 1947
Jul
37.3 mm (1.5 in)
16 July 1974
Aug
69.1 mm (2.7 in)
11 August 1957
Sep
42.2 mm (1.7 in)
20 September 1973
Oct
65.5 mm (2.6 in)
29 October 1975
Nov
69.9 mm (2.8 in)
24 November 1974
Dec
113.0 mm (4.4 in)
22 December 1957
Period of Record Coverage
1944 to 1983
Complete yearUnder 90 percent of days
40 years of record at Comox 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 Comox A, 1945 to 1983. Blue stripes are years cooler than the station's own mean of 9.3 C (48.7 F); red stripes are warmer. The coolest year was 1950, at 8.0 C (46.4 F), and the warmest was 1958, at 11.1 C (52.0 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Comox A as warming stripes, 1945 to 1983
Year
Annual mean temperature
Difference from the station mean
1945
9.6 C
+0.34 C
1946
9.1 C
-0.15 C
1947
9.3 C
+0.01 C
1948
8.5 C
-0.78 C
1949
8.5 C
-0.83 C
1950
8.0 C
-1.31 C
1951
8.6 C
-0.66 C
1952
9.2 C
-0.05 C
1953
9.7 C
+0.39 C
1954
8.9 C
-0.41 C
1955
8.2 C
-1.12 C
1956
9.1 C
-0.15 C
1957
9.3 C
+0.03 C
1958
11.1 C
+1.82 C
1959
9.5 C
+0.25 C
1960
9.4 C
+0.07 C
1961
10.1 C
+0.77 C
1962
9.5 C
+0.21 C
1963
9.9 C
+0.60 C
1964
8.7 C
-0.62 C
1965
9.3 C
+0.00 C
1966
9.5 C
+0.21 C
1967
10.3 C
+1.01 C
1968
9.6 C
+0.27 C
1969
9.3 C
+0.04 C
1970
9.3 C
+0.01 C
1971
8.8 C
-0.53 C
1972
8.8 C
-0.51 C
1973
8.9 C
-0.36 C
1974
9.4 C
+0.06 C
1975
8.7 C
-0.57 C
1976
9.1 C
-0.17 C
1977
9.3 C
+0.03 C
1978
9.4 C
+0.10 C
1979
9.6 C
+0.28 C
1980
9.6 C
+0.30 C
1981
9.9 C
+0.62 C
1982
9.4 C
+0.12 C
1983
9.9 C
+0.63 C
The fitted trend in annual mean temperature here over 1945 to 1983 is 0.13 C (-0.03 to 0.30) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.5) 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 Comox A
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.13 C (-0.03 to 0.30) per decade
0.2 F (-0.1 to 0.5) per decade
1945 to 1983
39
Not clearly different from zero
Mean daily maximum
0.02 C (-0.15 to 0.19) per decade
0.03 F (-0.28 to 0.34) per decade
1945 to 1983
39
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.8) per decade
1945 to 1983
39
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
1944 to 1983
Yearly extremes at Comox A: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
34.4 C (93.9 F)
1961
31.1 C (87.9 F)
40
Coldest night (TNn)
-21.1 C (-6.0 F)
1950
-9.4 C (15.1 F)
40
Wettest day (Rx1day)
113.0 mm (4.4 in)
1957
58.1 mm (2.3 in)
40
Wettest five days (Rx5day)
185.4 mm (7.3 in)
1982
116.0 mm (4.6 in)
40
Longest dry spell (CDD)
47 days
1974
27 days
40
Hottest day (TXx)
The hottest day of the year at Comox A, 1944 to 1983. The record is 34.4 C (93.9 F) in 1961, marked on the chart; the median year is 31.1 C (87.9 F).
Hottest day (TXx) at Comox A by year
Year
Hottest day (TXx)
1944
32.2 C (90.0 F)
1945
31.1 C (88.0 F)
1946
30.0 C (86.0 F)
1947
31.1 C (88.0 F)
1948
30.0 C (86.0 F)
1949
30.6 C (87.1 F)
1950
29.4 C (84.9 F)
1951
30.6 C (87.1 F)
1952
31.7 C (89.1 F)
1953
29.4 C (84.9 F)
1954
25.6 C (78.1 F)
1955
30.0 C (86.0 F)
1956
32.2 C (90.0 F)
1957
27.8 C (82.0 F)
1958
33.3 C (91.9 F)
1959
31.1 C (88.0 F)
1960
32.2 C (90.0 F)
1961
34.4 C (93.9 F)
1962
30.0 C (86.0 F)
1963
30.6 C (87.1 F)
1964
26.1 C (79.0 F)
1965
34.4 C (93.9 F)
1966
30.0 C (86.0 F)
1967
32.2 C (90.0 F)
1968
31.1 C (88.0 F)
1969
34.4 C (93.9 F)
1970
30.6 C (87.1 F)
1971
32.8 C (91.0 F)
1972
31.7 C (89.1 F)
1973
30.6 C (87.1 F)
1974
32.8 C (91.0 F)
1975
29.4 C (84.9 F)
1976
25.6 C (78.1 F)
1977
32.4 C (90.3 F)
1978
32.6 C (90.7 F)
1979
30.1 C (86.2 F)
1980
28.9 C (84.0 F)
1981
33.6 C (92.5 F)
1982
31.0 C (87.8 F)
1983
31.7 C (89.1 F)
Coldest night (TNn)
The coldest night of the year at Comox A, 1944 to 1983. The record is -21.1 C (-6.0 F) in 1950, marked on the chart; the median year is -9.4 C (15.1 F).
Coldest night (TNn) at Comox A by year
Year
Coldest night (TNn)
1944
-7.2 C (19.0 F)
1945
-7.2 C (19.0 F)
1946
-6.1 C (21.0 F)
1947
-12.8 C (9.0 F)
1948
-10.6 C (12.9 F)
1949
-17.2 C (1.0 F)
1950
-21.1 C (-6.0 F)
1951
-13.9 C (7.0 F)
1952
-13.9 C (7.0 F)
1953
-3.9 C (25.0 F)
1954
-13.3 C (8.1 F)
1955
-10.0 C (14.0 F)
1956
-9.4 C (15.1 F)
1957
-15.0 C (5.0 F)
1958
-7.2 C (19.0 F)
1959
-9.4 C (15.1 F)
1960
-8.3 C (17.1 F)
1961
-3.3 C (26.1 F)
1962
-6.7 C (19.9 F)
1963
-8.9 C (16.0 F)
1964
-12.2 C (10.0 F)
1965
-8.3 C (17.1 F)
1966
-8.3 C (17.1 F)
1967
-6.1 C (21.0 F)
1968
-15.0 C (5.0 F)
1969
-15.0 C (5.0 F)
1970
-7.2 C (19.0 F)
1971
-10.6 C (12.9 F)
1972
-10.0 C (14.0 F)
1973
-11.1 C (12.0 F)
1974
-8.3 C (17.1 F)
1975
-7.8 C (18.0 F)
1976
-6.7 C (19.9 F)
1977
-7.2 C (19.0 F)
1978
-8.5 C (16.7 F)
1979
-10.0 C (14.0 F)
1980
-10.5 C (13.1 F)
1981
-6.7 C (19.9 F)
1982
-11.7 C (10.9 F)
1983
-12.4 C (9.7 F)
Wettest day (Rx1day)
The wettest day of the year at Comox A, 1944 to 1983. The record is 113.0 mm (4.4 in) in 1957, marked on the chart; the median year is 58.1 mm (2.3 in).
Wettest day (Rx1day) at Comox A by year
Year
Wettest day (Rx1day)
1944
36.3 mm (1.4 in)
1945
63.5 mm (2.5 in)
1946
37.8 mm (1.5 in)
1947
64.5 mm (2.5 in)
1948
65.8 mm (2.6 in)
1949
59.7 mm (2.4 in)
1950
48.5 mm (1.9 in)
1951
47.2 mm (1.9 in)
1952
57.9 mm (2.3 in)
1953
38.6 mm (1.5 in)
1954
56.6 mm (2.2 in)
1955
51.3 mm (2.0 in)
1956
59.4 mm (2.3 in)
1957
113.0 mm (4.4 in)
1958
62.2 mm (2.4 in)
1959
69.9 mm (2.8 in)
1960
65.3 mm (2.6 in)
1961
41.4 mm (1.6 in)
1962
55.4 mm (2.2 in)
1963
53.3 mm (2.1 in)
1964
58.4 mm (2.3 in)
1965
48.8 mm (1.9 in)
1966
63.5 mm (2.5 in)
1967
73.2 mm (2.9 in)
1968
77.0 mm (3.0 in)
1969
58.4 mm (2.3 in)
1970
37.1 mm (1.5 in)
1971
53.8 mm (2.1 in)
1972
42.2 mm (1.7 in)
1973
66.3 mm (2.6 in)
1974
69.9 mm (2.8 in)
1975
65.5 mm (2.6 in)
1976
28.4 mm (1.1 in)
1977
46.8 mm (1.8 in)
1978
59.9 mm (2.4 in)
1979
53.7 mm (2.1 in)
1980
41.6 mm (1.6 in)
1981
48.4 mm (1.9 in)
1982
58.3 mm (2.3 in)
1983
80.2 mm (3.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Comox A, 1944 to 1983. The record is 185.4 mm (7.3 in) in 1982, marked on the chart; the median year is 116.0 mm (4.6 in).
Wettest five days (Rx5day) at Comox A by year
Year
Wettest five days (Rx5day)
1944
63.5 mm (2.5 in)
1945
126.3 mm (5.0 in)
1946
77.4 mm (3.0 in)
1947
112.0 mm (4.4 in)
1948
111.5 mm (4.4 in)
1949
110.0 mm (4.3 in)
1950
125.8 mm (5.0 in)
1951
139.7 mm (5.5 in)
1952
91.2 mm (3.6 in)
1953
123.7 mm (4.9 in)
1954
141.4 mm (5.6 in)
1955
106.4 mm (4.2 in)
1956
110.8 mm (4.4 in)
1957
181.5 mm (7.1 in)
1958
128.3 mm (5.1 in)
1959
149.9 mm (5.9 in)
1960
123.7 mm (4.9 in)
1961
119.9 mm (4.7 in)
1962
84.8 mm (3.3 in)
1963
130.0 mm (5.1 in)
1964
109.7 mm (4.3 in)
1965
100.3 mm (3.9 in)
1966
168.2 mm (6.6 in)
1967
139.1 mm (5.5 in)
1968
137.8 mm (5.4 in)
1969
111.8 mm (4.4 in)
1970
77.1 mm (3.0 in)
1971
93.6 mm (3.7 in)
1972
107.0 mm (4.2 in)
1973
134.6 mm (5.3 in)
1974
109.0 mm (4.3 in)
1975
138.1 mm (5.4 in)
1976
51.0 mm (2.0 in)
1977
110.2 mm (4.3 in)
1978
153.2 mm (6.0 in)
1979
136.3 mm (5.4 in)
1980
104.9 mm (4.1 in)
1981
109.7 mm (4.3 in)
1982
185.4 mm (7.3 in)
1983
142.2 mm (5.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Comox A, 1944 to 1983. The record is 47 days in 1974, marked on the chart; the median year is 27 days.
Longest dry spell (CDD) at Comox A by year
Year
Longest dry spell (CDD)
1944
39 days
1945
21 days
1946
24 days
1947
22 days
1948
13 days
1949
28 days
1950
29 days
1951
27 days
1952
28 days
1953
19 days
1954
27 days
1955
23 days
1956
32 days
1957
19 days
1958
35 days
1959
35 days
1960
30 days
1961
44 days
1962
28 days
1963
27 days
1964
16 days
1965
21 days
1966
16 days
1967
43 days
1968
24 days
1969
27 days
1970
27 days
1971
21 days
1972
34 days
1973
21 days
1974
47 days
1975
27 days
1976
21 days
1977
40 days
1978
15 days
1979
36 days
1980
28 days
1981
25 days
1982
23 days
1983
25 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 Comox A falls on 20 April and the median first autumn frost on 21 October, which leaves a median of 184 days between them.
Fitted over all years, the growing season changes by +7.7 days per decade at this station.
Frost dates and growing season at Comox A
Measure
Median, all years
Earliest period
Recent period (1954 to 1983)
Recent against earliest
Fitted trend
Last spring frost
20 April
n/a
17 April
n/a
-3.5 days per decade
First autumn frost
21 October
n/a
27 October
n/a
+4.2 days per decade
Growing days
184 days
n/a
190 days
n/a
+7.7 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 56.3 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 94.3 mm (3.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Comox 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
56.3 mm (2.2 in)
5 years
68.9 mm (2.7 in)
10 years
76.2 mm (3.0 in)
25 years
84.3 mm (3.3 in)
50 years
89.6 mm (3.5 in)
Longer than the 39 years of record
100 years
94.3 mm (3.7 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: 113.0 mm (4.4 in) in 1957; 80.2 mm (3.2 in) in 1983; 77.0 mm (3.0 in) in 1968.
Download the Data
Data for Comox A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Comox 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.