Peterborough A Weather Records (CA006166418)

Record envelope, standing records and threshold days for Peterborough A (CA006166418), Ontario, Canada, with 39 years of record.

Key Facts for Peterborough A

Peterborough A (CA006166418) is a weather station in Ontario, Canada at 44.23 latitude and -78.37 longitude, 191 m (627 ft) above sea level.
The station reports from 1969 to 2007, 39 years of record.
1,464 records set at Peterborough A 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, 44.23 latitude, -78.37 longitude.
Elevation: 191 m (627 ft).
Period of record: 1969 to 2007, 39 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 Peterborough 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 Peterborough A, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	11.1 C (52.0 F)	-37.1 C (-34.8 F)	n/a	n/a
Feb	11.3 C (52.3 F)	-37.8 C (-36.0 F)	n/a	n/a
Mar	22.1 C (71.8 F)	-29.1 C (-20.4 F)	n/a	n/a
Apr	27.8 C (82.0 F)	-15.0 C (5.0 F)	n/a	n/a
May	31.7 C (89.1 F)	-3.7 C (25.3 F)	n/a	n/a
Jun	31.7 C (89.1 F)	-0.7 C (30.7 F)	n/a	n/a
Jul	35.2 C (95.4 F)	4.4 C (39.9 F)	n/a	n/a
Aug	33.9 C (93.0 F)	0.0 C (32.0 F)	n/a	n/a
Sep	33.3 C (91.9 F)	-4.4 C (24.1 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-9.4 C (15.1 F)	n/a	n/a
Nov	22.8 C (73.0 F)	-17.6 C (0.3 F)	n/a	n/a
Dec	19.2 C (66.6 F)	-33.9 C (-29.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Peterborough A still stand. 1973 holds the most, with 125.

Wettest Day of Each Month

Jul: 73.4 mm (2.9 in)

The wettest day on record for each calendar month at Peterborough A. The most was 73.4 mm (2.9 in) on 20 July 1980.

Record daily precipitation for each month at Peterborough A
Month	Record daily precipitation (mm)	Date
Jan	32.3 mm (1.3 in)	24 January 1979
Feb	28.0 mm (1.1 in)	10 February 1981
Mar	61.3 mm (2.4 in)	21 March 1980
Apr	46.7 mm (1.8 in)	1 April 1973
May	33.8 mm (1.3 in)	18 May 1969
Jun	53.4 mm (2.1 in)	15 June 1981
Jul	73.4 mm (2.9 in)	20 July 1980
Aug	62.5 mm (2.5 in)	16 August 1977
Sep	45.8 mm (1.8 in)	18 September 1978
Oct	37.8 mm (1.5 in)	25 October 1980
Nov	34.0 mm (1.3 in)	16 November 1981
Dec	39.4 mm (1.6 in)	10 December 1969

Period of Record Coverage

1969 to 1983

15 years of record at Peterborough A, 1969 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1969.

Days with data per year at Peterborough A
Year	Days with data	Share of year	Complete
1969	322	88%	No
1970	359	98%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	364	100%	Yes
1978	364	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes

Latest Records

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

Climate Trend

14 complete years, 1970 to 1983

One stripe for each of 14 complete years at Peterborough A, 1970 to 1983. Blue stripes are years cooler than the station's own mean of 5.8 C (42.4 F); red stripes are warmer. The coolest year was 1978, at 4.8 C (40.6 F), and the warmest was 1973, at 6.9 C (44.4 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Peterborough A as warming stripes, 1970 to 1983
Year	Annual mean temperature	Difference from the station mean
1970	6.1 C	+0.30 C
1971	6.0 C	+0.25 C
1972	4.9 C	-0.86 C
1973	6.9 C	+1.11 C
1974	5.6 C	-0.14 C
1975	6.5 C	+0.75 C
1976	5.2 C	-0.57 C
1977	6.0 C	+0.18 C
1978	4.8 C	-1.01 C
1979	5.8 C	+0.01 C
1980	5.3 C	-0.52 C
1981	6.0 C	+0.19 C
1982	5.4 C	-0.40 C
1983	6.5 C	+0.70 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

1969 to 1983

Yearly extremes at Peterborough A: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.2 C (95.4 F)	1977	32.2 C (90.0 F)	15
Coldest night (TNn)	-37.8 C (-36.0 F)	1979	-32.0 C (-25.6 F)	15
Wettest day (Rx1day)	73.4 mm (2.9 in)	1980	45.8 mm (1.8 in)	15
Wettest five days (Rx5day)	99.4 mm (3.9 in)	1983	66.6 mm (2.6 in)	15
Longest dry spell (CDD)	28 days	1969	17 days	15

Hottest day (TXx)

The hottest day of the year at Peterborough A, 1969 to 1983. The record is 35.2 C (95.4 F) in 1977, marked on the chart; the median year is 32.2 C (90.0 F).

Hottest day (TXx) at Peterborough A by year
Year	Hottest day (TXx)
1969	31.7 C (89.1 F)
1970	32.2 C (90.0 F)
1971	32.2 C (90.0 F)
1972	31.1 C (88.0 F)
1973	33.3 C (91.9 F)
1974	32.8 C (91.0 F)
1975	33.9 C (93.0 F)
1976	31.1 C (88.0 F)
1977	35.2 C (95.4 F)
1978	33.9 C (93.0 F)
1979	31.8 C (89.2 F)
1980	31.3 C (88.3 F)
1981	31.8 C (89.2 F)
1982	32.4 C (90.3 F)
1983	33.0 C (91.4 F)

Coldest night (TNn)

The coldest night of the year at Peterborough A, 1969 to 1983. The record is -37.8 C (-36.0 F) in 1979, marked on the chart; the median year is -32.0 C (-25.6 F).

Coldest night (TNn) at Peterborough A by year
Year	Coldest night (TNn)
1969	-28.3 C (-18.9 F)
1970	-35.6 C (-32.1 F)
1971	-36.1 C (-33.0 F)
1972	-31.7 C (-25.1 F)
1973	-31.1 C (-24.0 F)
1974	-26.7 C (-16.1 F)
1975	-27.8 C (-18.0 F)
1976	-36.1 C (-33.0 F)
1977	-37.1 C (-34.8 F)
1978	-32.2 C (-26.0 F)
1979	-37.8 C (-36.0 F)
1980	-32.0 C (-25.6 F)
1981	-36.2 C (-33.2 F)
1982	-32.0 C (-25.6 F)
1983	-26.2 C (-15.2 F)

Wettest day (Rx1day)

The wettest day of the year at Peterborough A, 1969 to 1983. The record is 73.4 mm (2.9 in) in 1980, marked on the chart; the median year is 45.8 mm (1.8 in).

Wettest day (Rx1day) at Peterborough A by year
Year	Wettest day (Rx1day)
1969	60.5 mm (2.4 in)
1970	29.5 mm (1.2 in)
1971	33.0 mm (1.3 in)
1972	37.1 mm (1.5 in)
1973	46.7 mm (1.8 in)
1974	30.0 mm (1.2 in)
1975	69.6 mm (2.7 in)
1976	37.6 mm (1.5 in)
1977	62.5 mm (2.5 in)
1978	45.8 mm (1.8 in)
1979	33.8 mm (1.3 in)
1980	73.4 mm (2.9 in)
1981	53.4 mm (2.1 in)
1982	33.3 mm (1.3 in)
1983	57.0 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Peterborough A, 1969 to 1983. The record is 99.4 mm (3.9 in) in 1983, marked on the chart; the median year is 66.6 mm (2.6 in).

Wettest five days (Rx5day) at Peterborough A by year
Year	Wettest five days (Rx5day)
1969	65.8 mm (2.6 in)
1970	39.4 mm (1.6 in)
1971	48.2 mm (1.9 in)
1972	70.9 mm (2.8 in)
1973	79.4 mm (3.1 in)
1974	57.4 mm (2.3 in)
1975	84.1 mm (3.3 in)
1976	62.2 mm (2.4 in)
1977	68.2 mm (2.7 in)
1978	56.9 mm (2.2 in)
1979	61.5 mm (2.4 in)
1980	92.3 mm (3.6 in)
1981	79.1 mm (3.1 in)
1982	66.6 mm (2.6 in)
1983	99.4 mm (3.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Peterborough A, 1969 to 1983. The record is 28 days in 1969, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Peterborough A by year
Year	Longest dry spell (CDD)
1969	28 days
1970	17 days
1971	17 days
1972	14 days
1973	20 days
1974	14 days
1975	13 days
1976	13 days
1977	16 days
1978	24 days
1979	17 days
1980	14 days
1981	15 days
1982	17 days
1983	19 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 Peterborough A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Peterborough 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).