South Baymouth Weather Records (CA006097915)

Record envelope, standing records and threshold days for South Baymouth (CA006097915), Ontario, Canada, with 40 years of record.

Key Facts for South Baymouth

South Baymouth (CA006097915) is a weather station in Ontario, Canada at 45.58 latitude and -82.02 longitude, 182 m (597 ft) above sea level.
The station reports from 1954 to 1993, 40 years of record.
1,464 records set at South Baymouth 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, 45.58 latitude, -82.02 longitude.
Elevation: 182 m (597 ft).
Period of record: 1954 to 1993, 40 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 South Baymouth. 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 South Baymouth, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	7.8 C (46.0 F)	-37.0 C (-34.6 F)	n/a	n/a
Feb	8.0 C (46.4 F)	-36.5 C (-33.7 F)	n/a	n/a
Mar	12.2 C (54.0 F)	-31.1 C (-24.0 F)	n/a	n/a
Apr	21.1 C (70.0 F)	-19.5 C (-3.1 F)	n/a	n/a
May	29.5 C (85.1 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	29.4 C (84.9 F)	0.0 C (32.0 F)	n/a	n/a
Jul	33.9 C (93.0 F)	4.4 C (39.9 F)	n/a	n/a
Aug	31.1 C (88.0 F)	-0.6 C (30.9 F)	n/a	n/a
Sep	28.3 C (82.9 F)	-2.0 C (28.4 F)	n/a	n/a
Oct	23.9 C (75.0 F)	-8.3 C (17.1 F)	n/a	n/a
Nov	17.2 C (63.0 F)	-18.3 C (-0.9 F)	n/a	n/a
Dec	14.0 C (57.2 F)	-33.0 C (-27.4 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at South Baymouth still stand. 1964 holds the most, with 78.

Standing records at South Baymouth by the year they were set
Year set	Standing records
1954	12
1955	60
1956	55
1957	48
1958	53
1959	49
1960	31
1961	40
1962	48
1963	65
1964	78
1965	47
1966	49
1967	61
1968	54
1969	45
1970	38
1971	42
1972	35
1973	70
1974	40
1975	46
1976	69
1977	39
1978	20
1979	55
1980	44
1981	45
1982	60
1983	66

Wettest Day of Each Month

Oct: 94.0 mm (3.7 in)

The wettest day on record for each calendar month at South Baymouth. The most was 94.0 mm (3.7 in) on 6 October 1982.

Record daily precipitation for each month at South Baymouth
Month	Record daily precipitation (mm)	Date
Jan	27.9 mm (1.1 in)	7 January 1967
Feb	26.0 mm (1.0 in)	6 February 1979
Mar	45.5 mm (1.8 in)	12 March 1977
Apr	32.8 mm (1.3 in)	23 April 1968
May	37.3 mm (1.5 in)	27 May 1973
Jun	45.0 mm (1.8 in)	12 June 1967
Jul	39.6 mm (1.6 in)	23 July 1975
Aug	63.2 mm (2.5 in)	30 August 1959
Sep	41.4 mm (1.6 in)	9 September 1976
Oct	94.0 mm (3.7 in)	6 October 1982
Nov	47.5 mm (1.9 in)	27 November 1966
Dec	49.5 mm (1.9 in)	12 December 1968

Period of Record Coverage

1954 to 1983

30 years of record at South Baymouth, 1954 to 1983. 2 years have data for under 90 percent of days and are left out of rankings: 1954, 1974.

Days with data per year at South Baymouth
Year	Days with data	Share of year	Complete
1954	140	38%	No
1955	364	100%	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	364	100%	Yes
1964	365	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	364	100%	Yes
1968	365	100%	Yes
1969	364	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	308	84%	No
1975	365	100%	Yes
1976	366	100%	Yes
1977	364	100%	Yes
1978	364	100%	Yes
1979	334	92%	Yes
1980	366	100%	Yes
1981	364	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

27 complete years, 1955 to 1983

One stripe for each of 27 complete years at South Baymouth, 1955 to 1983. Blue stripes are years cooler than the station's own mean of 4.9 C (40.9 F); red stripes are warmer. The coolest year was 1972, at 4.0 C (39.1 F), and the warmest was 1955, at 6.0 C (42.8 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at South Baymouth as warming stripes, 1955 to 1983
Year	Annual mean temperature	Difference from the station mean
1955	6.0 C	+1.07 C
1956	4.7 C	-0.29 C
1957	5.2 C	+0.28 C
1958	4.9 C	-0.07 C
1959	4.9 C	-0.03 C
1960	5.0 C	+0.04 C
1961	5.5 C	+0.51 C
1962	4.9 C	-0.05 C
1963	4.5 C	-0.40 C
1964	5.6 C	+0.62 C
1965	4.5 C	-0.44 C
1966	5.0 C	+0.07 C
1967	4.5 C	-0.41 C
1968	4.9 C	-0.05 C
1969	4.9 C	-0.02 C
1970	4.6 C	-0.39 C
1971	4.9 C	-0.02 C
1972	4.0 C	-0.97 C
1973	6.0 C	+1.02 C
1975	5.5 C	+0.60 C
1976	4.2 C	-0.75 C
1977	5.0 C	+0.04 C
1978	4.2 C	-0.75 C
1980	4.3 C	-0.60 C
1981	5.2 C	+0.26 C
1982	4.8 C	-0.19 C
1983	5.8 C	+0.86 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 South Baymouth: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	33.9 C (93.0 F)	1975	28.3 C (82.9 F)	30
Coldest night (TNn)	-37.0 C (-34.6 F)	1982	-29.7 C (-21.5 F)	30
Wettest day (Rx1day)	94.0 mm (3.7 in)	1982	38.7 mm (1.5 in)	30
Wettest five days (Rx5day)	112.0 mm (4.4 in)	1969	67.9 mm (2.7 in)	30
Longest dry spell (CDD)	31 days	1962	17 days	30

Hottest day (TXx)

The hottest day of the year at South Baymouth, 1954 to 1983. The record is 33.9 C (93.0 F) in 1975, marked on the chart; the median year is 28.3 C (82.9 F).

Hottest day (TXx) at South Baymouth by year
Year	Hottest day (TXx)
1954	26.7 C (80.1 F)
1955	31.1 C (88.0 F)
1956	27.2 C (81.0 F)
1957	30.0 C (86.0 F)
1958	28.9 C (84.0 F)
1959	27.8 C (82.0 F)
1960	30.0 C (86.0 F)
1961	27.8 C (82.0 F)
1962	28.3 C (82.9 F)
1963	28.9 C (84.0 F)
1964	31.1 C (88.0 F)
1965	27.2 C (81.0 F)
1966	31.1 C (88.0 F)
1967	26.7 C (80.1 F)
1968	26.7 C (80.1 F)
1969	28.3 C (82.9 F)
1970	30.0 C (86.0 F)
1971	28.3 C (82.9 F)
1972	26.7 C (80.1 F)
1973	28.3 C (82.9 F)
1974	28.3 C (82.9 F)
1975	33.9 C (93.0 F)
1976	28.3 C (82.9 F)
1977	29.4 C (84.9 F)
1978	28.0 C (82.4 F)
1979	25.0 C (77.0 F)
1980	29.5 C (85.1 F)
1981	28.0 C (82.4 F)
1982	27.5 C (81.5 F)
1983	30.0 C (86.0 F)

Coldest night (TNn)

The coldest night of the year at South Baymouth, 1954 to 1983. The record is -37.0 C (-34.6 F) in 1982, marked on the chart; the median year is -29.7 C (-21.5 F).

Coldest night (TNn) at South Baymouth by year
Year	Coldest night (TNn)
1954	-21.1 C (-6.0 F)
1955	-28.3 C (-18.9 F)
1956	-25.6 C (-14.1 F)
1957	-31.1 C (-24.0 F)
1958	-26.7 C (-16.1 F)
1959	-32.8 C (-27.0 F)
1960	-25.0 C (-13.0 F)
1961	-27.2 C (-17.0 F)
1962	-31.1 C (-24.0 F)
1963	-28.9 C (-20.0 F)
1964	-26.7 C (-16.1 F)
1965	-30.0 C (-22.0 F)
1966	-28.3 C (-18.9 F)
1967	-31.7 C (-25.1 F)
1968	-32.2 C (-26.0 F)
1969	-25.6 C (-14.1 F)
1970	-31.7 C (-25.1 F)
1971	-31.1 C (-24.0 F)
1972	-28.9 C (-20.0 F)
1973	-26.7 C (-16.1 F)
1974	-23.9 C (-11.0 F)
1975	-27.2 C (-17.0 F)
1976	-33.3 C (-27.9 F)
1977	-33.3 C (-27.9 F)
1978	-30.0 C (-22.0 F)
1979	-36.5 C (-33.7 F)
1980	-33.0 C (-27.4 F)
1981	-34.5 C (-30.1 F)
1982	-37.0 C (-34.6 F)
1983	-29.5 C (-21.1 F)

Wettest day (Rx1day)

The wettest day of the year at South Baymouth, 1954 to 1983. The record is 94.0 mm (3.7 in) in 1982, marked on the chart; the median year is 38.7 mm (1.5 in).

Wettest day (Rx1day) at South Baymouth by year
Year	Wettest day (Rx1day)
1954	56.4 mm (2.2 in)
1955	21.3 mm (0.8 in)
1956	57.2 mm (2.3 in)
1957	33.8 mm (1.3 in)
1958	34.3 mm (1.4 in)
1959	63.2 mm (2.5 in)
1960	36.1 mm (1.4 in)
1961	35.3 mm (1.4 in)
1962	24.6 mm (1.0 in)
1963	35.8 mm (1.4 in)
1964	37.8 mm (1.5 in)
1965	40.9 mm (1.6 in)
1966	47.5 mm (1.9 in)
1967	45.0 mm (1.8 in)
1968	49.5 mm (1.9 in)
1969	51.8 mm (2.0 in)
1970	27.9 mm (1.1 in)
1971	31.2 mm (1.2 in)
1972	49.5 mm (1.9 in)
1973	37.3 mm (1.5 in)
1974	40.6 mm (1.6 in)
1975	39.6 mm (1.6 in)
1976	43.7 mm (1.7 in)
1977	45.5 mm (1.8 in)
1978	35.2 mm (1.4 in)
1979	37.8 mm (1.5 in)
1980	37.8 mm (1.5 in)
1981	29.0 mm (1.1 in)
1982	94.0 mm (3.7 in)
1983	40.0 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at South Baymouth, 1954 to 1983. The record is 112.0 mm (4.4 in) in 1969, marked on the chart; the median year is 67.9 mm (2.7 in).

Wettest five days (Rx5day) at South Baymouth by year
Year	Wettest five days (Rx5day)
1954	93.8 mm (3.7 in)
1955	32.8 mm (1.3 in)
1956	63.6 mm (2.5 in)
1957	56.1 mm (2.2 in)
1958	68.1 mm (2.7 in)
1959	91.1 mm (3.6 in)
1960	66.5 mm (2.6 in)
1961	56.7 mm (2.2 in)
1962	60.5 mm (2.4 in)
1963	76.2 mm (3.0 in)
1964	39.2 mm (1.5 in)
1965	77.5 mm (3.1 in)
1966	94.4 mm (3.7 in)
1967	73.0 mm (2.9 in)
1968	96.8 mm (3.8 in)
1969	112.0 mm (4.4 in)
1970	56.4 mm (2.2 in)
1971	41.1 mm (1.6 in)
1972	53.8 mm (2.1 in)
1973	74.1 mm (2.9 in)
1974	64.5 mm (2.5 in)
1975	56.2 mm (2.2 in)
1976	74.2 mm (2.9 in)
1977	67.8 mm (2.7 in)
1978	69.2 mm (2.7 in)
1979	60.0 mm (2.4 in)
1980	71.4 mm (2.8 in)
1981	44.4 mm (1.7 in)
1982	96.2 mm (3.8 in)
1983	78.3 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at South Baymouth, 1954 to 1983. The record is 31 days in 1962, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at South Baymouth by year
Year	Longest dry spell (CDD)
1954	11 days
1955	20 days
1956	16 days
1957	21 days
1958	27 days
1959	14 days
1960	14 days
1961	17 days
1962	31 days
1963	23 days
1964	10 days
1965	23 days
1966	27 days
1967	21 days
1968	17 days
1969	17 days
1970	15 days
1971	14 days
1972	18 days
1973	17 days
1974	16 days
1975	23 days
1976	17 days
1977	15 days
1978	18 days
1979	17 days
1980	12 days
1981	23 days
1982	17 days
1983	16 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

27 years with a frost

Across 27 years with a frost, the median last spring frost at South Baymouth falls on 17 May and the median first autumn frost on 3 October, which leaves a median of 136 days between them.

Fitted over all years, the growing season changes by -0.3 days per decade at this station.

Frost dates and growing season at South Baymouth
Measure	Median, all years	Earliest period	Recent period (1955 to 1983)	Recent against earliest	Fitted trend
Last spring frost	17 May	n/a	17 May	n/a	+0.4 days per decade
First autumn frost	3 October	n/a	3 October	n/a	+0.1 days per decade
Growing days	136 days	n/a	136 days	n/a	-0.3 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 South Baymouth standing records by year: CSV or JSON. Field meanings are on the data page.
Data for South Baymouth 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).