Copper Ctr Weather Records (USC00502156)

Record envelope, standing records and threshold days for Copper Ctr (USC00502156), Alaska, United States, with 81 years of record.

Key Facts for Copper Ctr

Copper Ctr (USC00502156) is a weather station in Alaska, United States at 61.97 latitude and -145.32 longitude, 305 m (1,000 ft) above sea level.
The station reports from 1902 to 1982, 81 years of record.
1,464 records set at Copper Ctr still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Alaska, United States, 61.97 latitude, -145.32 longitude.
Elevation: 305 m (1,000 ft).
Period of record: 1902 to 1982, 81 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 Copper Ctr. 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 Copper Ctr, 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)	-58.9 C (-74.0 F)	n/a	n/a
Feb	22.2 C (72.0 F)	-49.4 C (-56.9 F)	n/a	n/a
Mar	14.4 C (57.9 F)	-44.4 C (-47.9 F)	n/a	n/a
Apr	21.1 C (70.0 F)	-34.4 C (-29.9 F)	n/a	n/a
May	29.4 C (84.9 F)	-11.7 C (10.9 F)	n/a	n/a
Jun	35.6 C (96.1 F)	-6.1 C (21.0 F)	n/a	n/a
Jul	34.4 C (93.9 F)	-5.6 C (21.9 F)	n/a	n/a
Aug	34.4 C (93.9 F)	-11.1 C (12.0 F)	n/a	n/a
Sep	28.9 C (84.0 F)	-16.1 C (3.0 F)	n/a	n/a
Oct	20.0 C (68.0 F)	-32.2 C (-26.0 F)	n/a	n/a
Nov	9.4 C (48.9 F)	-43.3 C (-45.9 F)	n/a	n/a
Dec	10.0 C (50.0 F)	-49.4 C (-56.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Copper Ctr still stand. 1908 holds the most, with 122.

Standing records at Copper Ctr by the year they were set
Year set	Standing records
1902	30
1903	80
1904	66
1905	56
1906	57
1907	92
1908	122
1909	38
1910	66
1911	55
1912	32
1913	40
1914	97
1918	20
1919	32
1920	53
1922	34
1923	11
1941	42
1942	37
1961	26
1962	3
1969	23
1970	12
1972	10
1973	12
1974	35
1975	43
1976	32
1977	31
1978	14
1979	50
1980	48
1981	48
1982	17

Wettest Day of Each Month

Jul: 76.2 mm (3.0 in)

The wettest day on record for each calendar month at Copper Ctr. The most was 76.2 mm (3.0 in) on 15 July 1920.

Record daily precipitation for each month at Copper Ctr
Month	Record daily precipitation (mm)	Date
Jan	21.1 mm (0.8 in)	26 January 1913
Feb	25.4 mm (1.0 in)	25 February 1905
Mar	12.7 mm (0.5 in)	5 March 1920
Apr	29.0 mm (1.1 in)	2 April 1918
May	21.3 mm (0.8 in)	3 May 1977
Jun	38.1 mm (1.5 in)	26 June 1920
Jul	76.2 mm (3.0 in)	15 July 1920
Aug	44.5 mm (1.8 in)	13 August 1973
Sep	33.8 mm (1.3 in)	11 September 1911
Oct	24.1 mm (0.9 in)	18 October 1908
Nov	30.5 mm (1.2 in)	25 November 1902
Dec	37.1 mm (1.5 in)	3 December 1981

Period of Record Coverage

1902 to 1982

35 years of record at Copper Ctr, 1902 to 1982. 27 years have data for under 90 percent of days and are left out of rankings: 1902, 1909, 1912, 1913, 1914, 1918, 1919, 1920 and others.

Days with data per year at Copper Ctr
Year	Days with data	Share of year	Complete
1902	163	45%	No
1903	354	97%	Yes
1904	362	99%	Yes
1905	361	99%	Yes
1906	361	99%	Yes
1907	359	98%	Yes
1908	362	99%	Yes
1909	256	70%	No
1910	351	96%	Yes
1911	351	96%	Yes
1912	267	73%	No
1913	298	82%	No
1914	310	85%	No
1918	35	10%	No
1919	276	76%	No
1920	194	53%	No
1922	270	74%	No
1923	57	16%	No
1941	180	49%	No
1942	220	60%	No
1961	151	41%	No
1962	30	8%	No
1969	118	32%	No
1970	93	25%	No
1972	107	29%	No
1973	256	70%	No
1974	260	71%	No
1975	254	70%	No
1976	256	70%	No
1977	257	70%	No
1978	250	68%	No
1979	255	70%	No
1980	254	69%	No
1981	240	66%	No
1982	104	28%	No

Latest Records

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

Extremes by Year

1902 to 1982

Yearly extremes at Copper Ctr: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.6 C (96.1 F)	1903	30.0 C (86.0 F)	35
Coldest night (TNn)	-58.9 C (-74.0 F)	1906	-46.7 C (-52.1 F)	35
Wettest day (Rx1day)	76.2 mm (3.0 in)	1920	21.3 mm (0.8 in)	35
Wettest five days (Rx5day)	68.9 mm (2.7 in)	1912	29.0 mm (1.1 in)	34
Longest dry spell (CDD)	86 days	1978	30 days	35

Hottest day (TXx)

The hottest day of the year at Copper Ctr, 1902 to 1982. The record is 35.6 C (96.1 F) in 1903, marked on the chart; the median year is 30.0 C (86.0 F).

Hottest day (TXx) at Copper Ctr by year
Year	Hottest day (TXx)
1902	34.4 C (93.9 F)
1903	35.6 C (96.1 F)
1904	30.6 C (87.1 F)
1905	31.1 C (88.0 F)
1906	27.2 C (81.0 F)
1907	31.7 C (89.1 F)
1908	24.4 C (75.9 F)
1909	30.0 C (86.0 F)
1910	29.4 C (84.9 F)
1911	30.0 C (86.0 F)
1912	27.2 C (81.0 F)
1913	27.8 C (82.0 F)
1914	31.7 C (89.1 F)
1915	n/a
1918	22.2 C (72.0 F)
1919	30.6 C (87.1 F)
1920	28.3 C (82.9 F)
1922	29.4 C (84.9 F)
1923	7.2 C (45.0 F)
1941	22.8 C (73.0 F)
1942	30.0 C (86.0 F)
1961	23.9 C (75.0 F)
1962	1.7 C (35.1 F)
1969	33.3 C (91.9 F)
1970	25.6 C (78.1 F)
1972	31.1 C (88.0 F)
1973	27.8 C (82.0 F)
1974	28.9 C (84.0 F)
1975	31.1 C (88.0 F)
1976	34.4 C (93.9 F)
1977	31.7 C (89.1 F)
1978	32.2 C (90.0 F)
1979	30.0 C (86.0 F)
1980	31.7 C (89.1 F)
1981	27.8 C (82.0 F)
1982	15.6 C (60.1 F)

Coldest night (TNn)

The coldest night of the year at Copper Ctr, 1902 to 1982. The record is -58.9 C (-74.0 F) in 1906, marked on the chart; the median year is -46.7 C (-52.1 F).

Coldest night (TNn) at Copper Ctr by year
Year	Coldest night (TNn)
1902	-47.2 C (-53.0 F)
1903	-48.3 C (-54.9 F)
1904	-48.3 C (-54.9 F)
1905	-42.2 C (-44.0 F)
1906	-58.9 C (-74.0 F)
1907	-45.6 C (-50.1 F)
1908	-42.8 C (-45.0 F)
1909	-51.1 C (-60.0 F)
1910	-45.6 C (-50.1 F)
1911	-49.4 C (-56.9 F)
1912	-33.3 C (-27.9 F)
1913	-47.8 C (-54.0 F)
1914	-41.7 C (-43.1 F)
1915	n/a
1918	-44.4 C (-47.9 F)
1919	-42.2 C (-44.0 F)
1920	-47.2 C (-53.0 F)
1922	-48.3 C (-54.9 F)
1923	-51.1 C (-60.0 F)
1941	-45.6 C (-50.1 F)
1942	-34.4 C (-29.9 F)
1961	-48.9 C (-56.0 F)
1962	-51.1 C (-60.0 F)
1969	-10.6 C (12.9 F)
1970	-13.3 C (8.1 F)
1972	-39.4 C (-38.9 F)
1973	-47.8 C (-54.0 F)
1974	-45.6 C (-50.1 F)
1975	-50.0 C (-58.0 F)
1976	-46.7 C (-52.1 F)
1977	-42.8 C (-45.0 F)
1978	-38.9 C (-38.0 F)
1979	-49.4 C (-56.9 F)
1980	-49.4 C (-56.9 F)
1981	-44.4 C (-47.9 F)
1982	-47.2 C (-53.0 F)

Wettest day (Rx1day)

The wettest day of the year at Copper Ctr, 1902 to 1982. The record is 76.2 mm (3.0 in) in 1920, marked on the chart; the median year is 21.3 mm (0.8 in).

Wettest day (Rx1day) at Copper Ctr by year
Year	Wettest day (Rx1day)
1902	30.5 mm (1.2 in)
1903	21.1 mm (0.8 in)
1904	14.2 mm (0.6 in)
1905	25.4 mm (1.0 in)
1906	14.7 mm (0.6 in)
1907	10.2 mm (0.4 in)
1908	24.1 mm (0.9 in)
1909	13.7 mm (0.5 in)
1910	21.3 mm (0.8 in)
1911	33.8 mm (1.3 in)
1912	26.7 mm (1.1 in)
1913	27.4 mm (1.1 in)
1914	7.6 mm (0.30 in)
1915	n/a
1918	29.0 mm (1.1 in)
1919	6.4 mm (0.25 in)
1920	76.2 mm (3.0 in)
1922	25.4 mm (1.0 in)
1923	7.6 mm (0.30 in)
1941	18.8 mm (0.7 in)
1942	9.9 mm (0.39 in)
1961	25.7 mm (1.0 in)
1962	17.0 mm (0.7 in)
1969	18.3 mm (0.7 in)
1970	14.0 mm (0.6 in)
1972	39.9 mm (1.6 in)
1973	44.5 mm (1.8 in)
1974	25.7 mm (1.0 in)
1975	17.8 mm (0.7 in)
1976	31.2 mm (1.2 in)
1977	25.7 mm (1.0 in)
1978	14.7 mm (0.6 in)
1979	20.3 mm (0.8 in)
1980	21.6 mm (0.9 in)
1981	37.1 mm (1.5 in)
1982	12.7 mm (0.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Copper Ctr, 1902 to 1982. The record is 68.9 mm (2.7 in) in 1912, marked on the chart; the median year is 29.0 mm (1.1 in).

Wettest five days (Rx5day) at Copper Ctr by year
Year	Wettest five days (Rx5day)
1902	25.4 mm (1.0 in)
1903	31.6 mm (1.2 in)
1904	26.1 mm (1.0 in)
1905	31.2 mm (1.2 in)
1906	27.1 mm (1.1 in)
1907	10.2 mm (0.4 in)
1908	24.1 mm (0.9 in)
1909	17.8 mm (0.7 in)
1910	25.4 mm (1.0 in)
1911	41.9 mm (1.6 in)
1912	68.9 mm (2.7 in)
1913	33.0 mm (1.3 in)
1914	17.3 mm (0.7 in)
1915	n/a
1918	30.3 mm (1.2 in)
1919	8.4 mm (0.33 in)
1920	n/a
1922	28.5 mm (1.1 in)
1923	13.0 mm (0.5 in)
1941	28.9 mm (1.1 in)
1942	12.2 mm (0.5 in)
1961	48.0 mm (1.9 in)
1962	24.6 mm (1.0 in)
1969	31.2 mm (1.2 in)
1970	15.5 mm (0.6 in)
1972	41.4 mm (1.6 in)
1973	59.0 mm (2.3 in)
1974	41.4 mm (1.6 in)
1975	31.3 mm (1.2 in)
1976	41.2 mm (1.6 in)
1977	21.3 mm (0.8 in)
1978	29.0 mm (1.1 in)
1979	36.0 mm (1.4 in)
1980	30.0 mm (1.2 in)
1981	40.4 mm (1.6 in)
1982	15.0 mm (0.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Copper Ctr, 1902 to 1982. The record is 86 days in 1978, marked on the chart; the median year is 30 days.

Longest dry spell (CDD) at Copper Ctr by year
Year	Longest dry spell (CDD)
1902	16 days
1903	36 days
1904	22 days
1905	36 days
1906	20 days
1907	57 days
1908	42 days
1909	30 days
1910	41 days
1911	47 days
1912	26 days
1913	21 days
1914	39 days
1915	n/a
1918	42 days
1919	15 days
1920	2 days
1922	29 days
1923	28 days
1941	18 days
1942	26 days
1961	15 days
1962	13 days
1969	50 days
1970	26 days
1972	35 days
1973	38 days
1974	27 days
1975	42 days
1976	63 days
1977	18 days
1978	86 days
1979	59 days
1980	62 days
1981	55 days
1982	14 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.

Download the Data

Data for Copper Ctr standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Copper Ctr 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).