Copper Cliff Weather Records (CA006061870)

Record envelope, standing records and threshold days for Copper Cliff (CA006061870), Ontario, Canada, with 63 years of record.

Key Facts for Copper Cliff

Copper Cliff (CA006061870) is a weather station in Ontario, Canada at 46.48 latitude and -81.05 longitude, 274 m (899 ft) above sea level.
The station reports from 1906 to 1968, 63 years of record.
1,464 records set at Copper Cliff still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Ontario, Canada, 46.48 latitude, -81.05 longitude.
Elevation: 274 m (899 ft).
Period of record: 1906 to 1968, 63 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 Cliff. 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 Cliff, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	7.2 C (45.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Feb	5.0 C (41.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Mar	17.2 C (63.0 F)	-32.2 C (-26.0 F)	n/a	n/a
Apr	27.8 C (82.0 F)	-17.8 C (0.0 F)	n/a	n/a
May	31.7 C (89.1 F)	-7.2 C (19.0 F)	n/a	n/a
Jun	33.3 C (91.9 F)	0.0 C (32.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	5.0 C (41.0 F)	n/a	n/a
Aug	33.9 C (93.0 F)	2.2 C (36.0 F)	n/a	n/a
Sep	29.4 C (84.9 F)	-4.4 C (24.1 F)	n/a	n/a
Oct	25.0 C (77.0 F)	-11.1 C (12.0 F)	n/a	n/a
Nov	15.6 C (60.1 F)	-21.7 C (-7.1 F)	n/a	n/a
Dec	10.6 C (51.1 F)	-33.9 C (-29.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Copper Cliff still stand. 1911 holds the most, with 189.

Wettest Day of Each Month

Nov: 53.8 mm (2.1 in)

The wettest day on record for each calendar month at Copper Cliff. The most was 53.8 mm (2.1 in) on 22 November 1963.

Record daily precipitation for each month at Copper Cliff
Month	Record daily precipitation (mm)	Date
Jan	25.4 mm (1.0 in)	2 January 1915
Feb	50.8 mm (2.0 in)	7 February 1914
Mar	48.3 mm (1.9 in)	31 March 1910
Apr	27.9 mm (1.1 in)	19 April 1966
May	36.8 mm (1.4 in)	1 May 1967
Jun	29.5 mm (1.2 in)	5 June 1907
Jul	38.1 mm (1.5 in)	2 July 1965
Aug	51.1 mm (2.0 in)	16 August 1963
Sep	38.6 mm (1.5 in)	30 September 1909
Oct	50.8 mm (2.0 in)	15 October 1966
Nov	53.8 mm (2.1 in)	22 November 1963
Dec	30.0 mm (1.2 in)	10 December 1911

Period of Record Coverage

1906 to 1916

11 years of record at Copper Cliff, 1906 to 1916. 5 years have data for under 90 percent of days and are left out of rankings: 1906, 1907, 1908, 1914, 1916.

Days with data per year at Copper Cliff
Year	Days with data	Share of year	Complete
1906	83	23%	No
1907	294	81%	No
1908	122	33%	No
1909	365	100%	Yes
1910	352	96%	Yes
1911	365	100%	Yes
1912	366	100%	Yes
1913	329	90%	Yes
1914	275	75%	No
1915	365	100%	Yes
1916	152	42%	No

Latest Records

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

Extremes by Year

1906 to 1968

Yearly extremes at Copper Cliff: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1911	33.3 C (91.9 F)	11
Coldest night (TNn)	-38.9 C (-38.0 F)	1912	-32.2 C (-26.0 F)	11
Wettest day (Rx1day)	53.8 mm (2.1 in)	1963	36.6 mm (1.4 in)	17
Wettest five days (Rx5day)	69.9 mm (2.8 in)	1967	51.4 mm (2.0 in)	17
Longest dry spell (CDD)	27 days	1910	17 days	17

Hottest day (TXx)

The hottest day of the year at Copper Cliff, 1906 to 1968. The record is 36.7 C (98.1 F) in 1911, marked on the chart; the median year is 33.3 C (91.9 F).

Hottest day (TXx) at Copper Cliff by year
Year	Hottest day (TXx)
1906	25.0 C (77.0 F)
1907	33.3 C (91.9 F)
1908	29.4 C (84.9 F)
1909	32.8 C (91.0 F)
1910	33.9 C (93.0 F)
1911	36.7 C (98.1 F)
1912	33.3 C (91.9 F)
1913	33.9 C (93.0 F)
1914	33.3 C (91.9 F)
1915	31.7 C (89.1 F)
1916	25.0 C (77.0 F)
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a

Coldest night (TNn)

The coldest night of the year at Copper Cliff, 1906 to 1968. The record is -38.9 C (-38.0 F) in 1912, marked on the chart; the median year is -32.2 C (-26.0 F).

Coldest night (TNn) at Copper Cliff by year
Year	Coldest night (TNn)
1906	-30.6 C (-23.1 F)
1907	-32.2 C (-26.0 F)
1908	-28.3 C (-18.9 F)
1909	-34.4 C (-29.9 F)
1910	-36.1 C (-33.0 F)
1911	-36.1 C (-33.0 F)
1912	-38.9 C (-38.0 F)
1913	-32.2 C (-26.0 F)
1914	-37.2 C (-35.0 F)
1915	-26.7 C (-16.1 F)
1916	-15.6 C (3.9 F)
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a

Wettest day (Rx1day)

The wettest day of the year at Copper Cliff, 1906 to 1968. The record is 53.8 mm (2.1 in) in 1963, marked on the chart; the median year is 36.6 mm (1.4 in).

Wettest day (Rx1day) at Copper Cliff by year
Year	Wettest day (Rx1day)
1906	32.8 mm (1.3 in)
1907	29.5 mm (1.2 in)
1908	27.4 mm (1.1 in)
1909	38.6 mm (1.5 in)
1910	48.3 mm (1.9 in)
1911	32.0 mm (1.3 in)
1912	36.6 mm (1.4 in)
1913	37.1 mm (1.5 in)
1914	50.8 mm (2.0 in)
1915	32.0 mm (1.3 in)
1916	31.8 mm (1.3 in)
1963	53.8 mm (2.1 in)
1964	30.0 mm (1.2 in)
1965	38.1 mm (1.5 in)
1966	50.8 mm (2.0 in)
1967	36.8 mm (1.4 in)
1968	17.8 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Copper Cliff, 1906 to 1968. The record is 69.9 mm (2.8 in) in 1967, marked on the chart; the median year is 51.4 mm (2.0 in).

Wettest five days (Rx5day) at Copper Cliff by year
Year	Wettest five days (Rx5day)
1906	65.3 mm (2.6 in)
1907	51.4 mm (2.0 in)
1908	41.1 mm (1.6 in)
1909	58.6 mm (2.3 in)
1910	48.3 mm (1.9 in)
1911	58.5 mm (2.3 in)
1912	50.3 mm (2.0 in)
1913	46.5 mm (1.8 in)
1914	55.9 mm (2.2 in)
1915	47.2 mm (1.9 in)
1916	44.2 mm (1.7 in)
1963	54.1 mm (2.1 in)
1964	42.9 mm (1.7 in)
1965	54.6 mm (2.1 in)
1966	63.3 mm (2.5 in)
1967	69.9 mm (2.8 in)
1968	24.1 mm (0.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Copper Cliff, 1906 to 1968. The record is 27 days in 1910, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Copper Cliff by year
Year	Longest dry spell (CDD)
1906	16 days
1907	20 days
1908	17 days
1909	19 days
1910	27 days
1911	19 days
1912	17 days
1913	13 days
1914	23 days
1915	16 days
1916	18 days
1963	13 days
1964	14 days
1965	14 days
1966	17 days
1967	11 days
1968	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.

Download the Data

Data for Copper Cliff standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Copper Cliff 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).