Sudbury A Weather Records (CA006068150)

Record envelope, standing records and threshold days for Sudbury A (CA006068150), Ontario, Canada, with 60 years of record.

Key Facts for Sudbury A

Sudbury A (CA006068150) is a weather station in Ontario, Canada at 46.63 latitude and -80.80 longitude, 348 m (1,142 ft) above sea level.
The station reports from 1954 to 2013, 60 years of record.
1,464 records set at Sudbury A still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.

About the Station

Location: Ontario, Canada, 46.63 latitude, -80.80 longitude.
Elevation: 348 m (1,142 ft).
Period of record: 1954 to 2013, 60 years.
Eligible elements: tmax, tmin, prcp, snow.

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 Sudbury 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 Sudbury A, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	6.1 C (43.0 F)	-39.3 C (-38.7 F)	n/a	n/a
Feb	6.7 C (44.1 F)	-37.8 C (-36.0 F)	n/a	n/a
Mar	14.8 C (58.6 F)	-29.4 C (-20.9 F)	n/a	n/a
Apr	25.6 C (78.1 F)	-21.1 C (-6.0 F)	n/a	n/a
May	32.8 C (91.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	33.9 C (93.0 F)	-1.6 C (29.1 F)	n/a	n/a
Jul	38.3 C (100.9 F)	4.1 C (39.4 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)	-3.9 C (25.0 F)	n/a	n/a
Oct	25.0 C (77.0 F)	-10.0 C (14.0 F)	n/a	n/a
Nov	17.8 C (64.0 F)	-25.0 C (-13.0 F)	n/a	n/a
Dec	14.4 C (57.9 F)	-33.5 C (-28.3 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Sudbury A still stand. 1963 holds the most, with 70.

Standing records at Sudbury A by the year they were set
Year set	Standing records
1954	32
1955	66
1956	63
1957	58
1958	52
1959	62
1960	30
1961	50
1962	53
1963	70
1964	64
1965	47
1966	51
1967	51
1968	43
1969	35
1970	33
1971	39
1972	36
1973	54
1974	40
1975	49
1976	52
1977	53
1978	41
1979	60
1980	39
1981	45
1982	54
1983	42

Wettest Day of Each Month

Sep: 112.0 mm (4.4 in)

The wettest day on record for each calendar month at Sudbury A. The most was 112.0 mm (4.4 in) on 3 September 1970.

Record daily precipitation for each month at Sudbury A
Month	Record daily precipitation (mm)	Date
Jan	51.6 mm (2.0 in)	11 January 1980
Feb	37.8 mm (1.5 in)	22 February 1974
Mar	47.0 mm (1.9 in)	26 March 1963
Apr	49.9 mm (2.0 in)	26 April 1979
May	42.7 mm (1.7 in)	1 May 1967
Jun	86.9 mm (3.4 in)	12 June 1961
Jul	91.8 mm (3.6 in)	24 July 1977
Aug	77.7 mm (3.1 in)	21 August 1972
Sep	112.0 mm (4.4 in)	3 September 1970
Oct	55.6 mm (2.2 in)	15 October 1954
Nov	37.1 mm (1.5 in)	14 November 1957
Dec	42.9 mm (1.7 in)	10 December 1971

Period of Record Coverage

1954 to 1983

30 years of record at Sudbury A, 1954 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1954.

Days with data per year at Sudbury A
Year	Days with data	Share of year	Complete
1954	326	89%	No
1955	352	96%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	364	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	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	365	100%	Yes
1978	365	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

28 complete years, 1956 to 1983

One stripe for each of 28 complete years at Sudbury A, 1956 to 1983. Blue stripes are years cooler than the station's own mean of 3.4 C (38.0 F); red stripes are warmer. The coolest year was 1972, at 2.4 C (36.2 F), and the warmest was 1973, at 4.5 C (40.2 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Sudbury A as warming stripes, 1956 to 1983
Year	Annual mean temperature	Difference from the station mean
1956	2.8 C	-0.52 C
1957	3.8 C	+0.41 C
1958	3.4 C	+0.06 C
1959	3.2 C	-0.12 C
1960	3.5 C	+0.10 C
1961	3.8 C	+0.43 C
1962	3.1 C	-0.25 C
1963	3.1 C	-0.24 C
1964	3.6 C	+0.28 C
1965	2.6 C	-0.76 C
1966	3.3 C	-0.05 C
1967	2.8 C	-0.61 C
1968	3.5 C	+0.16 C
1969	3.6 C	+0.22 C
1970	3.1 C	-0.22 C
1971	3.7 C	+0.29 C
1972	2.4 C	-1.01 C
1973	4.5 C	+1.17 C
1974	3.1 C	-0.30 C
1975	4.4 C	+0.99 C
1976	2.8 C	-0.56 C
1977	4.1 C	+0.70 C
1978	2.7 C	-0.67 C
1979	3.2 C	-0.15 C
1980	2.7 C	-0.64 C
1981	4.1 C	+0.72 C
1982	3.2 C	-0.13 C
1983	4.0 C	+0.62 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

1954 to 1983

Yearly extremes at Sudbury A: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.3 C (100.9 F)	1975	31.7 C (89.1 F)	30
Coldest night (TNn)	-39.3 C (-38.7 F)	1982	-33.5 C (-28.4 F)	30
Wettest day (Rx1day)	112.0 mm (4.4 in)	1970	44.1 mm (1.7 in)	30
Wettest five days (Rx5day)	143.2 mm (5.6 in)	1972	69.9 mm (2.8 in)	30
Longest dry spell (CDD)	41 days	1961	14 days	30

Hottest day (TXx)

The hottest day of the year at Sudbury A, 1954 to 1983. The record is 38.3 C (100.9 F) in 1975, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at Sudbury A by year
Year	Hottest day (TXx)
1954	30.6 C (87.1 F)
1955	36.1 C (97.0 F)
1956	33.9 C (93.0 F)
1957	30.6 C (87.1 F)
1958	29.4 C (84.9 F)
1959	30.6 C (87.1 F)
1960	30.6 C (87.1 F)
1961	31.7 C (89.1 F)
1962	32.8 C (91.0 F)
1963	34.4 C (93.9 F)
1964	31.7 C (89.1 F)
1965	29.4 C (84.9 F)
1966	33.9 C (93.0 F)
1967	29.4 C (84.9 F)
1968	32.2 C (90.0 F)
1969	31.7 C (89.1 F)
1970	31.1 C (88.0 F)
1971	32.8 C (91.0 F)
1972	29.4 C (84.9 F)
1973	32.2 C (90.0 F)
1974	31.7 C (89.1 F)
1975	38.3 C (100.9 F)
1976	31.1 C (88.0 F)
1977	35.3 C (95.5 F)
1978	31.0 C (87.8 F)
1979	31.8 C (89.2 F)
1980	31.3 C (88.3 F)
1981	31.9 C (89.4 F)
1982	30.5 C (86.9 F)
1983	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Sudbury A, 1954 to 1983. The record is -39.3 C (-38.7 F) in 1982, marked on the chart; the median year is -33.5 C (-28.4 F).

Coldest night (TNn) at Sudbury A by year
Year	Coldest night (TNn)
1954	-30.6 C (-23.1 F)
1955	-35.0 C (-31.0 F)
1956	-33.3 C (-27.9 F)
1957	-35.6 C (-32.1 F)
1958	-30.6 C (-23.1 F)
1959	-36.1 C (-33.0 F)
1960	-34.4 C (-29.9 F)
1961	-30.6 C (-23.1 F)
1962	-35.6 C (-32.1 F)
1963	-32.8 C (-27.0 F)
1964	-30.0 C (-22.0 F)
1965	-35.6 C (-32.1 F)
1966	-31.1 C (-24.0 F)
1967	-37.8 C (-36.0 F)
1968	-37.2 C (-35.0 F)
1969	-27.2 C (-17.0 F)
1970	-32.8 C (-27.0 F)
1971	-35.6 C (-32.1 F)
1972	-33.9 C (-29.0 F)
1973	-32.8 C (-27.0 F)
1974	-30.6 C (-23.1 F)
1975	-32.8 C (-27.0 F)
1976	-35.0 C (-31.0 F)
1977	-33.8 C (-28.8 F)
1978	-28.4 C (-19.1 F)
1979	-33.6 C (-28.5 F)
1980	-33.5 C (-28.3 F)
1981	-36.8 C (-34.2 F)
1982	-39.3 C (-38.7 F)
1983	-32.6 C (-26.7 F)

Wettest day (Rx1day)

The wettest day of the year at Sudbury A, 1954 to 1983. The record is 112.0 mm (4.4 in) in 1970, marked on the chart; the median year is 44.1 mm (1.7 in).

Wettest day (Rx1day) at Sudbury A by year
Year	Wettest day (Rx1day)
1954	55.6 mm (2.2 in)
1955	39.4 mm (1.6 in)
1956	53.3 mm (2.1 in)
1957	41.4 mm (1.6 in)
1958	44.5 mm (1.8 in)
1959	42.2 mm (1.7 in)
1960	70.1 mm (2.8 in)
1961	86.9 mm (3.4 in)
1962	28.2 mm (1.1 in)
1963	47.0 mm (1.9 in)
1964	35.8 mm (1.4 in)
1965	33.3 mm (1.3 in)
1966	42.7 mm (1.7 in)
1967	42.7 mm (1.7 in)
1968	37.3 mm (1.5 in)
1969	46.7 mm (1.8 in)
1970	112.0 mm (4.4 in)
1971	42.9 mm (1.7 in)
1972	77.7 mm (3.1 in)
1973	35.6 mm (1.4 in)
1974	43.7 mm (1.7 in)
1975	30.5 mm (1.2 in)
1976	48.8 mm (1.9 in)
1977	91.8 mm (3.6 in)
1978	61.0 mm (2.4 in)
1979	49.9 mm (2.0 in)
1980	51.6 mm (2.0 in)
1981	58.4 mm (2.3 in)
1982	38.0 mm (1.5 in)
1983	43.0 mm (1.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Sudbury A, 1954 to 1983. The record is 143.2 mm (5.6 in) in 1972, marked on the chart; the median year is 69.9 mm (2.8 in).

Wettest five days (Rx5day) at Sudbury A by year
Year	Wettest five days (Rx5day)
1954	101.0 mm (4.0 in)
1955	64.3 mm (2.5 in)
1956	66.5 mm (2.6 in)
1957	84.7 mm (3.3 in)
1958	65.8 mm (2.6 in)
1959	63.8 mm (2.5 in)
1960	94.0 mm (3.7 in)
1961	94.0 mm (3.7 in)
1962	47.0 mm (1.9 in)
1963	69.4 mm (2.7 in)
1964	45.7 mm (1.8 in)
1965	67.3 mm (2.6 in)
1966	59.2 mm (2.3 in)
1967	70.4 mm (2.8 in)
1968	50.5 mm (2.0 in)
1969	72.1 mm (2.8 in)
1970	118.4 mm (4.7 in)
1971	50.7 mm (2.0 in)
1972	143.2 mm (5.6 in)
1973	67.4 mm (2.7 in)
1974	75.2 mm (3.0 in)
1975	51.8 mm (2.0 in)
1976	93.2 mm (3.7 in)
1977	93.0 mm (3.7 in)
1978	76.6 mm (3.0 in)
1979	72.4 mm (2.9 in)
1980	78.6 mm (3.1 in)
1981	93.7 mm (3.7 in)
1982	56.0 mm (2.2 in)
1983	68.1 mm (2.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Sudbury A, 1954 to 1983. The record is 41 days in 1961, marked on the chart; the median year is 14 days.

Longest dry spell (CDD) at Sudbury A by year
Year	Longest dry spell (CDD)
1954	17 days
1955	12 days
1956	13 days
1957	16 days
1958	29 days
1959	16 days
1960	18 days
1961	41 days
1962	11 days
1963	15 days
1964	14 days
1965	19 days
1966	14 days
1967	14 days
1968	10 days
1969	14 days
1970	15 days
1971	13 days
1972	14 days
1973	11 days
1974	12 days
1975	19 days
1976	19 days
1977	13 days
1978	13 days
1979	12 days
1980	14 days
1981	12 days
1982	10 days
1983	17 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

28 years with a frost

Across 28 years with a frost, the median last spring frost at Sudbury A falls on 16 May and the median first autumn frost on 26 September, which leaves a median of 133 days between them.

Fitted over all years, the growing season changes by +7.0 days per decade at this station.

Frost dates and growing season at Sudbury A
Measure	Median, all years	Earliest period	Recent period (1956 to 1983)	Recent against earliest	Fitted trend
Last spring frost	16 May	n/a	16 May	n/a	-3.6 days per decade
First autumn frost	26 September	n/a	26 September	n/a	+3.4 days per decade
Growing days	133 days	n/a	133 days	n/a	+7.0 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.

Download the Data

Data for Sudbury A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sudbury 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).