Hedley Np Mine Weather Records (CA001123390)

Record envelope, standing records and threshold days for Hedley Np Mine (CA001123390), British Columbia, Canada, with 112 years of record.

Key Facts for Hedley Np Mine

Hedley Np Mine (CA001123390) is a weather station in British Columbia, Canada at 49.37 latitude and -120.02 longitude, 1,651 m (5,417 ft) above sea level.
The station reports from 1904 to 2015, 112 years of record.
1,464 records set at Hedley Np Mine still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: British Columbia, Canada, 49.37 latitude, -120.02 longitude.
Elevation: 1,651 m (5,417 ft).
Period of record: 1904 to 2015, 112 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Hedley Np Mine. 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 Hedley Np Mine, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	9.4 C (48.9 F)	-38.9 C (-38.0 F)	n/a	n/a
Feb	13.3 C (55.9 F)	-32.2 C (-26.0 F)	n/a	n/a
Mar	18.9 C (66.0 F)	-31.7 C (-25.1 F)	n/a	n/a
Apr	22.8 C (73.0 F)	-19.4 C (-2.9 F)	n/a	n/a
May	25.6 C (78.1 F)	-13.3 C (8.1 F)	n/a	n/a
Jun	28.3 C (82.9 F)	-7.8 C (18.0 F)	n/a	n/a
Jul	32.8 C (91.0 F)	-3.9 C (25.0 F)	n/a	n/a
Aug	29.4 C (84.9 F)	-7.2 C (19.0 F)	n/a	n/a
Sep	28.9 C (84.0 F)	-8.3 C (17.1 F)	n/a	n/a
Oct	24.4 C (75.9 F)	-20.6 C (-5.1 F)	n/a	n/a
Nov	17.8 C (64.0 F)	-31.7 C (-25.1 F)	n/a	n/a
Dec	10.0 C (50.0 F)	-31.1 C (-24.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Hedley Np Mine still stand. 1916 holds the most, with 114.

Standing records at Hedley Np Mine by the year they were set
Year set	Standing records
1904	48
1905	63
1906	73
1907	37
1908	39
1910	58
1911	89
1912	60
1913	54
1914	57
1915	42
1916	114
1917	60
1939	54
1940	43
1941	44
1942	51
1943	32
1944	48
1945	43
1946	27
1947	53
1948	37
1949	51
1950	42
1951	35
1952	31
1953	17
1954	41
1955	21

Wettest Day of Each Month

May: 63.5 mm (2.5 in)

The wettest day on record for each calendar month at Hedley Np Mine. The most was 63.5 mm (2.5 in) on 16 May 1911.

Record daily precipitation for each month at Hedley Np Mine
Month	Record daily precipitation (mm)	Date
Jan	30.5 mm (1.2 in)	31 January 1914
Feb	35.6 mm (1.4 in)	14 February 1949
Mar	24.1 mm (0.9 in)	9 March 1952
Apr	24.9 mm (1.0 in)	11 April 1948
May	63.5 mm (2.5 in)	16 May 1911
Jun	41.9 mm (1.6 in)	1 June 1944
Jul	45.7 mm (1.8 in)	28 July 1950
Aug	25.4 mm (1.0 in)	27 August 1951
Sep	30.5 mm (1.2 in)	8 September 1914
Oct	48.3 mm (1.9 in)	25 October 1945
Nov	20.3 mm (0.8 in)	13 November 1906
Dec	42.7 mm (1.7 in)	27 December 1949

Period of Record Coverage

1904 to 1955

30 years of record at Hedley Np Mine, 1904 to 1955. 4 years have data for under 90 percent of days and are left out of rankings: 1908, 1911, 1954, 1955.

Days with data per year at Hedley Np Mine
Year	Days with data	Share of year	Complete
1904	342	93%	Yes
1905	364	100%	Yes
1906	364	100%	Yes
1907	331	91%	Yes
1908	304	83%	No
1910	365	100%	Yes
1911	296	81%	No
1912	366	100%	Yes
1913	364	100%	Yes
1914	364	100%	Yes
1915	364	100%	Yes
1916	363	99%	Yes
1917	331	91%	Yes
1939	332	91%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	357	98%	Yes
1945	365	100%	Yes
1946	364	100%	Yes
1947	364	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	362	99%	Yes
1954	297	81%	No
1955	145	40%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

21 complete years, 1905 to 1952

One stripe for each of 21 complete years at Hedley Np Mine, 1905 to 1952. Blue stripes are years cooler than the station's own mean of 1.7 C (35.1 F); red stripes are warmer. The coolest year was 1916, at -1.2 C (29.9 F), and the warmest was 1944, at 3.4 C (38.1 F). The strongest colour marks a difference of 2.9 C (5.2 F).

Annual mean temperature at Hedley Np Mine as warming stripes, 1905 to 1952
Year	Annual mean temperature	Difference from the station mean
1905	2.7 C	+0.96 C
1906	3.3 C	+1.54 C
1910	0.0 C	-1.73 C
1912	0.8 C	-0.88 C
1913	0.8 C	-0.93 C
1914	2.5 C	+0.76 C
1915	2.0 C	+0.29 C
1916	-1.2 C	-2.90 C
1940	2.8 C	+1.05 C
1941	2.2 C	+0.46 C
1942	2.0 C	+0.32 C
1943	1.7 C	-0.01 C
1944	3.4 C	+1.66 C
1945	2.3 C	+0.56 C
1946	1.7 C	+0.02 C
1947	2.2 C	+0.49 C
1948	0.8 C	-0.95 C
1949	1.4 C	-0.31 C
1950	0.8 C	-0.89 C
1951	1.2 C	-0.55 C
1952	2.8 C	+1.04 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

1904 to 1955

Yearly extremes at Hedley Np Mine: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	32.8 C (91.0 F)	1939	27.5 C (81.5 F)	30
Coldest night (TNn)	-38.9 C (-38.0 F)	1943	-28.9 C (-20.0 F)	30
Wettest day (Rx1day)	63.5 mm (2.5 in)	1911	28.3 mm (1.1 in)	30
Wettest five days (Rx5day)	137.1 mm (5.4 in)	1911	49.3 mm (1.9 in)	30
Longest dry spell (CDD)	55 days	1914	25 days	30

Hottest day (TXx)

The hottest day of the year at Hedley Np Mine, 1904 to 1955. The record is 32.8 C (91.0 F) in 1939, marked on the chart; the median year is 27.5 C (81.5 F).

Hottest day (TXx) at Hedley Np Mine by year
Year	Hottest day (TXx)
1904	28.3 C (82.9 F)
1905	28.3 C (82.9 F)
1906	32.2 C (90.0 F)
1907	25.6 C (78.1 F)
1908	30.0 C (86.0 F)
1910	25.6 C (78.1 F)
1911	27.8 C (82.0 F)
1912	26.7 C (80.1 F)
1913	28.9 C (84.0 F)
1914	27.8 C (82.0 F)
1915	28.9 C (84.0 F)
1916	28.9 C (84.0 F)
1917	29.4 C (84.9 F)
1939	32.8 C (91.0 F)
1940	26.7 C (80.1 F)
1941	28.3 C (82.9 F)
1942	32.2 C (90.0 F)
1943	23.9 C (75.0 F)
1944	30.6 C (87.1 F)
1945	28.3 C (82.9 F)
1946	26.1 C (79.0 F)
1947	25.6 C (78.1 F)
1948	26.1 C (79.0 F)
1949	25.6 C (78.1 F)
1950	27.2 C (81.0 F)
1951	26.1 C (79.0 F)
1952	27.2 C (81.0 F)
1953	25.6 C (78.1 F)
1954	23.3 C (73.9 F)
1955	11.1 C (52.0 F)

Coldest night (TNn)

The coldest night of the year at Hedley Np Mine, 1904 to 1955. The record is -38.9 C (-38.0 F) in 1943, marked on the chart; the median year is -28.9 C (-20.0 F).

Coldest night (TNn) at Hedley Np Mine by year
Year	Coldest night (TNn)
1904	-27.8 C (-18.0 F)
1905	-27.2 C (-17.0 F)
1906	-24.4 C (-11.9 F)
1907	-33.3 C (-27.9 F)
1908	-29.4 C (-20.9 F)
1910	-32.2 C (-26.0 F)
1911	-37.2 C (-35.0 F)
1912	-28.9 C (-20.0 F)
1913	-28.3 C (-18.9 F)
1914	-30.6 C (-23.1 F)
1915	-25.0 C (-13.0 F)
1916	-38.3 C (-36.9 F)
1917	-28.9 C (-20.0 F)
1939	-28.9 C (-20.0 F)
1940	-23.3 C (-9.9 F)
1941	-26.1 C (-15.0 F)
1942	-25.6 C (-14.1 F)
1943	-38.9 C (-38.0 F)
1944	-23.9 C (-11.0 F)
1945	-24.4 C (-11.9 F)
1946	-23.9 C (-11.0 F)
1947	-29.4 C (-20.9 F)
1948	-26.7 C (-16.1 F)
1949	-32.2 C (-26.0 F)
1950	-36.7 C (-34.1 F)
1951	-33.3 C (-27.9 F)
1952	-23.9 C (-11.0 F)
1953	-20.0 C (-4.0 F)
1954	-31.7 C (-25.1 F)
1955	-31.7 C (-25.1 F)

Wettest day (Rx1day)

The wettest day of the year at Hedley Np Mine, 1904 to 1955. The record is 63.5 mm (2.5 in) in 1911, marked on the chart; the median year is 28.3 mm (1.1 in).

Wettest day (Rx1day) at Hedley Np Mine by year
Year	Wettest day (Rx1day)
1904	26.7 mm (1.1 in)
1905	25.1 mm (1.0 in)
1906	35.6 mm (1.4 in)
1907	22.9 mm (0.9 in)
1908	30.5 mm (1.2 in)
1910	25.4 mm (1.0 in)
1911	63.5 mm (2.5 in)
1912	30.5 mm (1.2 in)
1913	30.5 mm (1.2 in)
1914	38.1 mm (1.5 in)
1915	20.3 mm (0.8 in)
1916	30.5 mm (1.2 in)
1917	25.4 mm (1.0 in)
1939	24.4 mm (1.0 in)
1940	19.6 mm (0.8 in)
1941	25.4 mm (1.0 in)
1942	21.6 mm (0.9 in)
1943	25.4 mm (1.0 in)
1944	50.8 mm (2.0 in)
1945	48.3 mm (1.9 in)
1946	27.4 mm (1.1 in)
1947	25.4 mm (1.0 in)
1948	24.9 mm (1.0 in)
1949	42.7 mm (1.7 in)
1950	45.7 mm (1.8 in)
1951	27.4 mm (1.1 in)
1952	38.1 mm (1.5 in)
1953	40.6 mm (1.6 in)
1954	34.3 mm (1.4 in)
1955	29.2 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Hedley Np Mine, 1904 to 1955. The record is 137.1 mm (5.4 in) in 1911, marked on the chart; the median year is 49.3 mm (1.9 in).

Wettest five days (Rx5day) at Hedley Np Mine by year
Year	Wettest five days (Rx5day)
1904	34.1 mm (1.3 in)
1905	41.4 mm (1.6 in)
1906	80.7 mm (3.2 in)
1907	42.2 mm (1.7 in)
1908	46.0 mm (1.8 in)
1910	43.2 mm (1.7 in)
1911	137.1 mm (5.4 in)
1912	61.7 mm (2.4 in)
1913	45.7 mm (1.8 in)
1914	71.9 mm (2.8 in)
1915	45.7 mm (1.8 in)
1916	58.5 mm (2.3 in)
1917	40.7 mm (1.6 in)
1939	34.1 mm (1.3 in)
1940	27.8 mm (1.1 in)
1941	51.3 mm (2.0 in)
1942	43.1 mm (1.7 in)
1943	32.7 mm (1.3 in)
1944	114.3 mm (4.5 in)
1945	59.8 mm (2.4 in)
1946	49.8 mm (2.0 in)
1947	60.0 mm (2.4 in)
1948	53.3 mm (2.1 in)
1949	83.8 mm (3.3 in)
1950	51.0 mm (2.0 in)
1951	50.3 mm (2.0 in)
1952	49.1 mm (1.9 in)
1953	49.5 mm (1.9 in)
1954	40.9 mm (1.6 in)
1955	47.0 mm (1.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Hedley Np Mine, 1904 to 1955. The record is 55 days in 1914, marked on the chart; the median year is 25 days.

Longest dry spell (CDD) at Hedley Np Mine by year
Year	Longest dry spell (CDD)
1904	31 days
1905	15 days
1906	23 days
1907	19 days
1908	33 days
1910	28 days
1911	23 days
1912	22 days
1913	29 days
1914	55 days
1915	26 days
1916	15 days
1917	38 days
1939	20 days
1940	43 days
1941	19 days
1942	20 days
1943	46 days
1944	30 days
1945	20 days
1946	29 days
1947	17 days
1948	17 days
1949	16 days
1950	32 days
1951	33 days
1952	40 days
1953	32 days
1954	24 days
1955	18 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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Hedley Np Mine falls on 24 June and the median first autumn frost on 25 July, which leaves a median of 30 days between them.

Frost dates and growing season at Hedley Np Mine
Measure	Median, all years	Earliest period	Recent period (1905 to 1952)	Recent against earliest	Fitted trend
Last spring frost	24 June	n/a	24 June	n/a	n/a
First autumn frost	25 July	n/a	25 July	n/a	n/a
Growing days	30 days	n/a	30 days	n/a	n/a

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.

Download the Data

Data for Hedley Np Mine standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hedley Np Mine 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).