Record envelope, standing records and threshold days for Fort St John A (CA001183000), British Columbia, Canada, with 71 years of record.
Key Facts for Fort St John A
Fort St John A (CA001183000) is a weather station in British Columbia, Canada at 56.23 latitude and -120.73 longitude, 695 m (2,280 ft) above sea level.
The station reports from 1942 to 2012, 71 years of record.
1,464 records set at Fort St John A still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Fort St John A set a daily record low minimum temperature of -34.5 C (-30.1 F) on 17 December 1983.
About the Station
Location: British Columbia, Canada, 56.23 latitude, -120.73 longitude.
Elevation: 695 m (2,280 ft).
Period of record: 1942 to 2012, 71 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 Fort St John 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 Fort St John A, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
10.6 C (51.1 F)
-47.2 C (-53.0 F)
n/a
n/a
Feb
12.8 C (55.0 F)
-42.2 C (-44.0 F)
n/a
n/a
Mar
13.9 C (57.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Apr
27.9 C (82.2 F)
-28.9 C (-20.0 F)
n/a
n/a
May
31.8 C (89.2 F)
-10.6 C (12.9 F)
n/a
n/a
Jun
31.7 C (89.1 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
33.3 C (91.9 F)
2.2 C (36.0 F)
n/a
n/a
Aug
33.6 C (92.5 F)
-1.2 C (29.8 F)
n/a
n/a
Sep
30.0 C (86.0 F)
-12.8 C (9.0 F)
n/a
n/a
Oct
25.6 C (78.1 F)
-20.6 C (-5.1 F)
n/a
n/a
Nov
18.3 C (64.9 F)
-36.1 C (-33.0 F)
n/a
n/a
Dec
11.4 C (52.5 F)
-40.6 C (-41.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Fort St John A still stand. 1951 holds the most, with 67.
Standing records at Fort St John A by the year they were set
Year set
Standing records
1942
31
1943
57
1944
34
1945
46
1946
19
1947
42
1948
34
1949
45
1950
53
1951
67
1952
34
1953
27
1954
58
1955
39
1956
47
1957
25
1958
18
1959
40
1960
28
1961
53
1962
20
1963
41
1964
29
1965
43
1966
40
1967
29
1968
42
1969
31
1970
31
1971
20
1972
32
1973
25
1974
21
1975
25
1976
28
1977
51
1978
21
1979
36
1980
37
1981
30
1982
23
1983
12
All-Time Record Progression
1 new records
1 all-time records were set at Fort St John A between 9 August 1981 and 9 August 1981. Each dot is a new record.
When Fort St John A set new all-time records
Date
Kind
Detail
1981-08-09
Record high maximum temperature
Record high maximum temperature 33.6 C (92.5 F)
Wettest Day of Each Month
Jun: 80.3 mm (3.2 in)
The wettest day on record for each calendar month at Fort St John A. The most was 80.3 mm (3.2 in) on 27 June 1965.
Record daily precipitation for each month at Fort St John A
Month
Record daily precipitation (mm)
Date
Jan
18.5 mm (0.7 in)
20 January 1968
Feb
17.3 mm (0.7 in)
24 February 1973
Mar
31.5 mm (1.2 in)
10 March 1954
Apr
21.6 mm (0.9 in)
30 April 1974
May
49.8 mm (2.0 in)
27 May 1979
Jun
80.3 mm (3.2 in)
27 June 1965
Jul
60.2 mm (2.4 in)
9 July 1972
Aug
58.4 mm (2.3 in)
10 August 1972
Sep
26.4 mm (1.0 in)
16 September 1944
Oct
34.5 mm (1.4 in)
4 October 1957
Nov
24.9 mm (1.0 in)
22 November 1957
Dec
28.7 mm (1.1 in)
11 December 1955
Period of Record Coverage
1942 to 1983
Complete yearUnder 90 percent of days
42 years of record at Fort St John A, 1942 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1942.
Cooler than the station meanWarmer than the station mean
One stripe for each of 41 complete years at Fort St John A, 1943 to 1983. Blue stripes are years cooler than the station's own mean of 1.3 C (34.4 F); red stripes are warmer. The coolest year was 1950, at -1.2 C (29.8 F), and the warmest was 1981, at 3.7 C (38.7 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Fort St John A as warming stripes, 1943 to 1983
Year
Annual mean temperature
Difference from the station mean
1943
3.2 C
+1.89 C
1944
3.6 C
+2.22 C
1945
1.4 C
+0.08 C
1946
1.4 C
+0.04 C
1947
1.6 C
+0.24 C
1948
0.8 C
-0.53 C
1949
1.8 C
+0.45 C
1950
-1.2 C
-2.55 C
1951
-0.9 C
-2.28 C
1952
2.2 C
+0.84 C
1953
2.3 C
+0.96 C
1954
0.9 C
-0.46 C
1955
-0.3 C
-1.66 C
1956
0.8 C
-0.56 C
1957
1.3 C
-0.04 C
1958
2.5 C
+1.20 C
1959
1.5 C
+0.21 C
1960
2.2 C
+0.87 C
1961
1.4 C
+0.05 C
1962
1.7 C
+0.34 C
1963
2.0 C
+0.64 C
1964
1.0 C
-0.35 C
1965
0.8 C
-0.55 C
1966
-0.5 C
-1.79 C
1967
1.4 C
+0.06 C
1968
1.0 C
-0.31 C
1969
0.3 C
-1.06 C
1970
1.3 C
-0.08 C
1971
0.9 C
-0.47 C
1972
-0.6 C
-1.93 C
1973
1.0 C
-0.29 C
1974
1.2 C
-0.17 C
1975
1.0 C
-0.36 C
1976
2.9 C
+1.55 C
1977
2.5 C
+1.15 C
1978
2.1 C
+0.74 C
1979
1.1 C
-0.21 C
1980
2.7 C
+1.34 C
1981
3.7 C
+2.38 C
1982
-0.3 C
-1.66 C
1983
1.2 C
-0.10 C
The fitted trend in annual mean temperature here over 1943 to 1983 is 0.0 C (-0.3 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.0 F (-0.6 to 0.6) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Fort St John A
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.0 C (-0.3 to 0.3) per decade
0.0 F (-0.6 to 0.6) per decade
1943 to 1983
41
Not clearly different from zero
Mean daily maximum
-0.05 C (-0.35 to 0.26) per decade
-0.1 F (-0.6 to 0.5) per decade
1943 to 1983
41
Not clearly different from zero
Mean daily minimum
0.05 C (-0.27 to 0.37) per decade
0.1 F (-0.5 to 0.7) per decade
1943 to 1983
41
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
1942 to 1983
Yearly extremes at Fort St John A: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
33.6 C (92.5 F)
1981
30.0 C (86.0 F)
42
Coldest night (TNn)
-47.2 C (-53.0 F)
1947
-38.6 C (-37.6 F)
42
Wettest day (Rx1day)
80.3 mm (3.2 in)
1965
32.5 mm (1.3 in)
42
Wettest five days (Rx5day)
112.2 mm (4.4 in)
1954
57.9 mm (2.3 in)
42
Longest dry spell (CDD)
55 days
1945
27 days
42
Hottest day (TXx)
The hottest day of the year at Fort St John A, 1942 to 1983. The record is 33.6 C (92.5 F) in 1981, marked on the chart; the median year is 30.0 C (86.0 F).
Hottest day (TXx) at Fort St John A by year
Year
Hottest day (TXx)
1942
33.3 C (91.9 F)
1943
27.8 C (82.0 F)
1944
33.3 C (91.9 F)
1945
32.8 C (91.0 F)
1946
29.4 C (84.9 F)
1947
28.9 C (84.0 F)
1948
30.0 C (86.0 F)
1949
30.0 C (86.0 F)
1950
31.1 C (88.0 F)
1951
27.8 C (82.0 F)
1952
29.4 C (84.9 F)
1953
28.9 C (84.0 F)
1954
27.2 C (81.0 F)
1955
29.4 C (84.9 F)
1956
28.9 C (84.0 F)
1957
25.6 C (78.1 F)
1958
30.0 C (86.0 F)
1959
31.7 C (89.1 F)
1960
31.1 C (88.0 F)
1961
31.7 C (89.1 F)
1962
31.1 C (88.0 F)
1963
30.0 C (86.0 F)
1964
28.9 C (84.0 F)
1965
31.7 C (89.1 F)
1966
30.0 C (86.0 F)
1967
30.6 C (87.1 F)
1968
31.7 C (89.1 F)
1969
31.7 C (89.1 F)
1970
31.7 C (89.1 F)
1971
30.6 C (87.1 F)
1972
28.9 C (84.0 F)
1973
29.4 C (84.9 F)
1974
28.3 C (82.9 F)
1975
30.0 C (86.0 F)
1976
25.0 C (77.0 F)
1977
27.9 C (82.2 F)
1978
29.8 C (85.6 F)
1979
29.5 C (85.1 F)
1980
28.2 C (82.8 F)
1981
33.6 C (92.5 F)
1982
31.6 C (88.9 F)
1983
31.8 C (89.2 F)
Coldest night (TNn)
The coldest night of the year at Fort St John A, 1942 to 1983. The record is -47.2 C (-53.0 F) in 1947, marked on the chart; the median year is -38.6 C (-37.6 F).
Coldest night (TNn) at Fort St John A by year
Year
Coldest night (TNn)
1942
-32.8 C (-27.0 F)
1943
-42.2 C (-44.0 F)
1944
-32.2 C (-26.0 F)
1945
-36.1 C (-33.0 F)
1946
-37.2 C (-35.0 F)
1947
-47.2 C (-53.0 F)
1948
-40.6 C (-41.1 F)
1949
-39.4 C (-38.9 F)
1950
-43.9 C (-47.0 F)
1951
-37.2 C (-35.0 F)
1952
-43.9 C (-47.0 F)
1953
-38.3 C (-36.9 F)
1954
-45.0 C (-49.0 F)
1955
-36.7 C (-34.1 F)
1956
-40.0 C (-40.0 F)
1957
-37.8 C (-36.0 F)
1958
-34.4 C (-29.9 F)
1959
-41.1 C (-42.0 F)
1960
-29.4 C (-20.9 F)
1961
-37.2 C (-35.0 F)
1962
-34.4 C (-29.9 F)
1963
-35.0 C (-31.0 F)
1964
-37.2 C (-35.0 F)
1965
-38.9 C (-38.0 F)
1966
-43.3 C (-45.9 F)
1967
-34.4 C (-29.9 F)
1968
-40.0 C (-40.0 F)
1969
-42.8 C (-45.0 F)
1970
-40.6 C (-41.1 F)
1971
-39.4 C (-38.9 F)
1972
-38.9 C (-38.0 F)
1973
-31.1 C (-24.0 F)
1974
-37.2 C (-35.0 F)
1975
-41.1 C (-42.0 F)
1976
-42.2 C (-44.0 F)
1977
-40.4 C (-40.7 F)
1978
-36.9 C (-34.4 F)
1979
-40.8 C (-41.4 F)
1980
-37.0 C (-34.6 F)
1981
-38.4 C (-37.1 F)
1982
-39.4 C (-38.9 F)
1983
-37.5 C (-35.5 F)
Wettest day (Rx1day)
The wettest day of the year at Fort St John A, 1942 to 1983. The record is 80.3 mm (3.2 in) in 1965, marked on the chart; the median year is 32.5 mm (1.3 in).
Wettest day (Rx1day) at Fort St John A by year
Year
Wettest day (Rx1day)
1942
36.3 mm (1.4 in)
1943
24.6 mm (1.0 in)
1944
26.4 mm (1.0 in)
1945
14.2 mm (0.6 in)
1946
26.9 mm (1.1 in)
1947
14.0 mm (0.6 in)
1948
30.2 mm (1.2 in)
1949
19.6 mm (0.8 in)
1950
45.0 mm (1.8 in)
1951
21.6 mm (0.9 in)
1952
19.1 mm (0.8 in)
1953
23.9 mm (0.9 in)
1954
55.6 mm (2.2 in)
1955
28.7 mm (1.1 in)
1956
39.1 mm (1.5 in)
1957
56.9 mm (2.2 in)
1958
24.4 mm (1.0 in)
1959
18.0 mm (0.7 in)
1960
47.8 mm (1.9 in)
1961
26.9 mm (1.1 in)
1962
32.5 mm (1.3 in)
1963
26.4 mm (1.0 in)
1964
53.1 mm (2.1 in)
1965
80.3 mm (3.2 in)
1966
48.5 mm (1.9 in)
1967
28.4 mm (1.1 in)
1968
42.2 mm (1.7 in)
1969
22.1 mm (0.9 in)
1970
42.2 mm (1.7 in)
1971
39.1 mm (1.5 in)
1972
60.2 mm (2.4 in)
1973
32.5 mm (1.3 in)
1974
43.7 mm (1.7 in)
1975
59.7 mm (2.4 in)
1976
45.5 mm (1.8 in)
1977
36.8 mm (1.4 in)
1978
20.2 mm (0.8 in)
1979
49.8 mm (2.0 in)
1980
44.2 mm (1.7 in)
1981
29.8 mm (1.2 in)
1982
30.6 mm (1.2 in)
1983
32.6 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Fort St John A, 1942 to 1983. The record is 112.2 mm (4.4 in) in 1954, marked on the chart; the median year is 57.9 mm (2.3 in).
Wettest five days (Rx5day) at Fort St John A by year
Year
Wettest five days (Rx5day)
1942
66.2 mm (2.6 in)
1943
40.1 mm (1.6 in)
1944
54.1 mm (2.1 in)
1945
24.9 mm (1.0 in)
1946
47.5 mm (1.9 in)
1947
26.4 mm (1.0 in)
1948
68.6 mm (2.7 in)
1949
30.4 mm (1.2 in)
1950
45.0 mm (1.8 in)
1951
38.9 mm (1.5 in)
1952
42.1 mm (1.7 in)
1953
43.2 mm (1.7 in)
1954
112.2 mm (4.4 in)
1955
44.2 mm (1.7 in)
1956
79.3 mm (3.1 in)
1957
76.7 mm (3.0 in)
1958
25.0 mm (1.0 in)
1959
36.0 mm (1.4 in)
1960
74.3 mm (2.9 in)
1961
60.5 mm (2.4 in)
1962
68.4 mm (2.7 in)
1963
47.5 mm (1.9 in)
1964
85.6 mm (3.4 in)
1965
92.7 mm (3.6 in)
1966
81.5 mm (3.2 in)
1967
41.6 mm (1.6 in)
1968
62.0 mm (2.4 in)
1969
55.7 mm (2.2 in)
1970
60.0 mm (2.4 in)
1971
61.2 mm (2.4 in)
1972
87.4 mm (3.4 in)
1973
51.0 mm (2.0 in)
1974
93.7 mm (3.7 in)
1975
68.1 mm (2.7 in)
1976
88.4 mm (3.5 in)
1977
51.1 mm (2.0 in)
1978
28.2 mm (1.1 in)
1979
75.1 mm (3.0 in)
1980
73.6 mm (2.9 in)
1981
40.8 mm (1.6 in)
1982
68.6 mm (2.7 in)
1983
55.8 mm (2.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Fort St John A, 1942 to 1983. The record is 55 days in 1945, marked on the chart; the median year is 27 days.
Longest dry spell (CDD) at Fort St John A by year
Year
Longest dry spell (CDD)
1942
23 days
1943
35 days
1944
23 days
1945
55 days
1946
41 days
1947
20 days
1948
34 days
1949
21 days
1950
32 days
1951
22 days
1952
27 days
1953
51 days
1954
31 days
1955
42 days
1956
34 days
1957
22 days
1958
43 days
1959
27 days
1960
31 days
1961
32 days
1962
22 days
1963
27 days
1964
23 days
1965
26 days
1966
20 days
1967
22 days
1968
15 days
1969
21 days
1970
28 days
1971
28 days
1972
19 days
1973
32 days
1974
29 days
1975
19 days
1976
22 days
1977
21 days
1978
26 days
1979
35 days
1980
40 days
1981
36 days
1982
29 days
1983
24 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
41 years with a frost
Across 41 years with a frost, the median last spring frost at Fort St John A falls on 18 May and the median first autumn frost on 12 September, which leaves a median of 113 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 Fort St John A
Measure
Median, all years
Earliest period
Recent period (1954 to 1983)
Recent against earliest
Fitted trend
Last spring frost
18 May
n/a
19 May
n/a
+0.7 days per decade
First autumn frost
12 September
n/a
14 September
n/a
+3.3 days per decade
Growing days
113 days
n/a
114 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
41 years, 1943 to 1983
A day with at least 33.3 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 82.4 mm (3.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Fort St John 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
33.3 mm (1.3 in)
5 years
46.8 mm (1.8 in)
10 years
55.5 mm (2.2 in)
25 years
66.5 mm (2.6 in)
50 years
74.5 mm (2.9 in)
Longer than the 41 years of record
100 years
82.4 mm (3.2 in)
Longer than the 41 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, 41 years of values from 1943 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: 80.3 mm (3.2 in) in 1965; 60.2 mm (2.4 in) in 1972; 59.7 mm (2.4 in) in 1975.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Fort St John A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Fort St John 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.