Record envelope, standing records and threshold days for Heffley Creek (CA001163400), British Columbia, Canada, with 43 years of record.
Key Facts for Heffley Creek
Heffley Creek (CA001163400) is a weather station in British Columbia, Canada at 50.92 latitude and -120.18 longitude, 683 m (2,241 ft) above sea level.
The station reports from 1953 to 1995, 43 years of record.
1,464 records set at Heffley Creek still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Heffley Creek set a daily record precipitation of 14.4 mm (0.6 in) on 25 December 1983.
About the Station
Location: British Columbia, Canada, 50.92 latitude, -120.18 longitude.
Elevation: 683 m (2,241 ft).
Period of record: 1953 to 1995, 43 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 Heffley Creek. 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 Heffley Creek, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.8 C (55.0 F)
-38.9 C (-38.0 F)
n/a
n/a
Feb
15.0 C (59.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Mar
19.4 C (66.9 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
30.0 C (86.0 F)
-11.7 C (10.9 F)
n/a
n/a
May
33.5 C (92.3 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
34.4 C (93.9 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
37.0 C (98.6 F)
-0.6 C (30.9 F)
n/a
n/a
Aug
36.7 C (98.1 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
31.1 C (88.0 F)
-7.2 C (19.0 F)
n/a
n/a
Oct
25.5 C (77.9 F)
-13.3 C (8.1 F)
n/a
n/a
Nov
18.9 C (66.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Dec
12.2 C (54.0 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 Heffley Creek still stand. 1954 holds the most, with 75.
Standing records at Heffley Creek by the year they were set
Year set
Standing records
1953
31
1954
75
1955
71
1956
64
1957
55
1958
49
1959
40
1960
40
1961
57
1962
50
1963
41
1964
38
1965
55
1966
47
1967
56
1968
57
1969
42
1970
40
1971
39
1972
43
1973
49
1974
29
1975
69
1976
32
1977
37
1978
27
1979
44
1980
49
1981
43
1982
44
1983
51
Wettest Day of Each Month
Aug: 43.2 mm (1.7 in)
The wettest day on record for each calendar month at Heffley Creek. The most was 43.2 mm (1.7 in) on 16 August 1976.
Record daily precipitation for each month at Heffley Creek
Month
Record daily precipitation (mm)
Date
Jan
22.4 mm (0.9 in)
23 January 1958
Feb
25.9 mm (1.0 in)
6 February 1960
Mar
14.0 mm (0.6 in)
22 March 1972
Apr
14.5 mm (0.6 in)
23 April 1969
May
22.1 mm (0.9 in)
25 May 1954
Jun
33.0 mm (1.3 in)
21 June 1969
Jul
36.3 mm (1.4 in)
1 July 1954
Aug
43.2 mm (1.7 in)
16 August 1976
Sep
28.2 mm (1.1 in)
3 September 1954
Oct
15.2 mm (0.6 in)
22 October 1967
Nov
36.6 mm (1.4 in)
25 November 1977
Dec
26.9 mm (1.1 in)
8 December 1956
Period of Record Coverage
1953 to 1983
Complete yearUnder 90 percent of days
31 years of record at Heffley Creek, 1953 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1953.
Cooler than the station meanWarmer than the station mean
One stripe for each of 27 complete years at Heffley Creek, 1954 to 1983. Blue stripes are years cooler than the station's own mean of 5.4 C (41.7 F); red stripes are warmer. The coolest year was 1955, at 3.5 C (38.4 F), and the warmest was 1958, at 7.1 C (44.7 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Heffley Creek as warming stripes, 1954 to 1983
Year
Annual mean temperature
Difference from the station mean
1954
5.1 C
-0.27 C
1955
3.5 C
-1.86 C
1956
4.8 C
-0.58 C
1957
4.5 C
-0.88 C
1958
7.1 C
+1.69 C
1959
5.3 C
-0.14 C
1960
5.6 C
+0.17 C
1961
6.5 C
+1.15 C
1962
5.8 C
+0.45 C
1963
6.3 C
+0.90 C
1965
5.5 C
+0.10 C
1966
6.1 C
+0.73 C
1968
5.8 C
+0.37 C
1969
5.2 C
-0.20 C
1970
5.1 C
-0.27 C
1971
5.0 C
-0.37 C
1972
4.4 C
-1.04 C
1973
5.9 C
+0.49 C
1974
6.2 C
+0.76 C
1975
4.4 C
-1.03 C
1976
5.4 C
-0.03 C
1977
5.3 C
-0.07 C
1978
4.8 C
-0.64 C
1980
5.3 C
-0.06 C
1981
6.4 C
+0.98 C
1982
4.6 C
-0.84 C
1983
5.8 C
+0.43 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1953 to 1983
Yearly extremes at Heffley Creek: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.0 C (98.6 F)
1979
34.0 C (93.2 F)
31
Coldest night (TNn)
-40.6 C (-41.1 F)
1968
-31.1 C (-24.0 F)
31
Wettest day (Rx1day)
43.2 mm (1.7 in)
1976
21.3 mm (0.8 in)
31
Wettest five days (Rx5day)
56.0 mm (2.2 in)
1976
32.5 mm (1.3 in)
31
Longest dry spell (CDD)
45 days
1974
27 days
31
Hottest day (TXx)
The hottest day of the year at Heffley Creek, 1953 to 1983. The record is 37.0 C (98.6 F) in 1979, marked on the chart; the median year is 34.0 C (93.2 F).
Hottest day (TXx) at Heffley Creek by year
Year
Hottest day (TXx)
1953
33.3 C (91.9 F)
1954
30.6 C (87.1 F)
1955
32.8 C (91.0 F)
1956
35.0 C (95.0 F)
1957
31.7 C (89.1 F)
1958
34.4 C (93.9 F)
1959
36.1 C (97.0 F)
1960
34.4 C (93.9 F)
1961
35.0 C (95.0 F)
1962
32.2 C (90.0 F)
1963
32.2 C (90.0 F)
1964
32.2 C (90.0 F)
1965
35.0 C (95.0 F)
1966
32.8 C (91.0 F)
1967
36.7 C (98.1 F)
1968
35.0 C (95.0 F)
1969
33.9 C (93.0 F)
1970
33.9 C (93.0 F)
1971
36.7 C (98.1 F)
1972
34.4 C (93.9 F)
1973
35.0 C (95.0 F)
1974
33.9 C (93.0 F)
1975
34.4 C (93.9 F)
1976
31.7 C (89.1 F)
1977
33.9 C (93.0 F)
1978
34.5 C (94.1 F)
1979
37.0 C (98.6 F)
1980
32.0 C (89.6 F)
1981
34.5 C (94.1 F)
1982
33.0 C (91.4 F)
1983
34.0 C (93.2 F)
Coldest night (TNn)
The coldest night of the year at Heffley Creek, 1953 to 1983. The record is -40.6 C (-41.1 F) in 1968, marked on the chart; the median year is -31.1 C (-24.0 F).
Coldest night (TNn) at Heffley Creek by year
Year
Coldest night (TNn)
1953
-11.7 C (10.9 F)
1954
-34.4 C (-29.9 F)
1955
-33.3 C (-27.9 F)
1956
-33.9 C (-29.0 F)
1957
-36.7 C (-34.1 F)
1958
-23.3 C (-9.9 F)
1959
-28.9 C (-20.0 F)
1960
-26.1 C (-15.0 F)
1961
-22.2 C (-8.0 F)
1962
-33.9 C (-29.0 F)
1963
-28.3 C (-18.9 F)
1964
-33.9 C (-29.0 F)
1965
-30.0 C (-22.0 F)
1966
-30.0 C (-22.0 F)
1967
-22.8 C (-9.0 F)
1968
-40.6 C (-41.1 F)
1969
-38.9 C (-38.0 F)
1970
-31.1 C (-24.0 F)
1971
-34.4 C (-29.9 F)
1972
-36.7 C (-34.1 F)
1973
-26.7 C (-16.1 F)
1974
-27.8 C (-18.0 F)
1975
-35.0 C (-31.0 F)
1976
-30.0 C (-22.0 F)
1977
-31.0 C (-23.8 F)
1978
-35.0 C (-31.0 F)
1979
-32.0 C (-25.6 F)
1980
-30.5 C (-22.9 F)
1981
-25.5 C (-13.9 F)
1982
-33.0 C (-27.4 F)
1983
-36.0 C (-32.8 F)
Wettest day (Rx1day)
The wettest day of the year at Heffley Creek, 1953 to 1983. The record is 43.2 mm (1.7 in) in 1976, marked on the chart; the median year is 21.3 mm (0.8 in).
Wettest day (Rx1day) at Heffley Creek by year
Year
Wettest day (Rx1day)
1953
27.9 mm (1.1 in)
1954
36.3 mm (1.4 in)
1955
15.0 mm (0.6 in)
1956
26.9 mm (1.1 in)
1957
16.8 mm (0.7 in)
1958
22.4 mm (0.9 in)
1959
21.8 mm (0.9 in)
1960
25.9 mm (1.0 in)
1961
17.8 mm (0.7 in)
1962
21.3 mm (0.8 in)
1963
18.0 mm (0.7 in)
1964
25.9 mm (1.0 in)
1965
20.3 mm (0.8 in)
1966
15.5 mm (0.6 in)
1967
25.7 mm (1.0 in)
1968
25.9 mm (1.0 in)
1969
33.0 mm (1.3 in)
1970
9.9 mm (0.39 in)
1971
20.8 mm (0.8 in)
1972
14.7 mm (0.6 in)
1973
15.2 mm (0.6 in)
1974
18.0 mm (0.7 in)
1975
17.0 mm (0.7 in)
1976
43.2 mm (1.7 in)
1977
36.6 mm (1.4 in)
1978
17.4 mm (0.7 in)
1979
10.4 mm (0.4 in)
1980
22.0 mm (0.9 in)
1981
18.4 mm (0.7 in)
1982
23.8 mm (0.9 in)
1983
25.8 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Heffley Creek, 1953 to 1983. The record is 56.0 mm (2.2 in) in 1976, marked on the chart; the median year is 32.5 mm (1.3 in).
Wettest five days (Rx5day) at Heffley Creek by year
Year
Wettest five days (Rx5day)
1953
30.5 mm (1.2 in)
1954
45.5 mm (1.8 in)
1955
25.6 mm (1.0 in)
1956
34.5 mm (1.4 in)
1957
38.4 mm (1.5 in)
1958
31.1 mm (1.2 in)
1959
41.1 mm (1.6 in)
1960
28.7 mm (1.1 in)
1961
22.4 mm (0.9 in)
1962
44.1 mm (1.7 in)
1963
27.2 mm (1.1 in)
1964
29.5 mm (1.2 in)
1965
35.1 mm (1.4 in)
1966
29.0 mm (1.1 in)
1967
32.8 mm (1.3 in)
1968
37.5 mm (1.5 in)
1969
53.3 mm (2.1 in)
1970
21.9 mm (0.9 in)
1971
50.8 mm (2.0 in)
1972
32.5 mm (1.3 in)
1973
20.0 mm (0.8 in)
1974
26.5 mm (1.0 in)
1975
31.0 mm (1.2 in)
1976
56.0 mm (2.2 in)
1977
45.4 mm (1.8 in)
1978
29.4 mm (1.2 in)
1979
18.6 mm (0.7 in)
1980
42.6 mm (1.7 in)
1981
32.2 mm (1.3 in)
1982
55.2 mm (2.2 in)
1983
35.2 mm (1.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Heffley Creek, 1953 to 1983. The record is 45 days in 1974, marked on the chart; the median year is 27 days.
Longest dry spell (CDD) at Heffley Creek by year
Year
Longest dry spell (CDD)
1953
27 days
1954
24 days
1955
26 days
1956
24 days
1957
29 days
1958
38 days
1959
25 days
1960
32 days
1961
22 days
1962
28 days
1963
31 days
1964
25 days
1965
28 days
1966
36 days
1967
33 days
1968
26 days
1969
30 days
1970
43 days
1971
35 days
1972
27 days
1973
35 days
1974
45 days
1975
16 days
1976
26 days
1977
19 days
1978
43 days
1979
22 days
1980
18 days
1981
19 days
1982
21 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
27 years with a frost
Across 27 years with a frost, the median last spring frost at Heffley Creek falls on 28 May and the median first autumn frost on 17 September, which leaves a median of 110 days between them.
Fitted over all years, the growing season changes by +3.2 days per decade at this station.
Frost dates and growing season at Heffley Creek
Measure
Median, all years
Earliest period
Recent period (1954 to 1983)
Recent against earliest
Fitted trend
Last spring frost
28 May
n/a
28 May
n/a
-2.3 days per decade
First autumn frost
17 September
n/a
17 September
n/a
+0.9 days per decade
Growing days
110 days
n/a
110 days
n/a
+3.2 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
30 years, 1954 to 1983
A day with at least 20.7 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 47.4 mm (1.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Heffley Creek: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
20.7 mm (0.8 in)
5 years
27.5 mm (1.1 in)
10 years
32.2 mm (1.3 in)
25 years
38.2 mm (1.5 in)
50 years
42.8 mm (1.7 in)
Longer than the 30 years of record
100 years
47.4 mm (1.9 in)
Longer than the 30 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, 30 years of values from 1954 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: 43.2 mm (1.7 in) in 1976; 36.6 mm (1.4 in) in 1977; 36.3 mm (1.4 in) in 1954.
Download the Data
Data for Heffley Creek standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Heffley Creek 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.