Toronto Island A Weather Records (CA006158665)

Record envelope, standing records and threshold days for Toronto Island A (CA006158665), Ontario, Canada, with 50 years of record.

Key Facts for Toronto Island A

Toronto Island A (CA006158665) is a weather station in Ontario, Canada at 43.63 latitude and -79.40 longitude, 77 m (253 ft) above sea level.
The station reports from 1957 to 2006, 50 years of record.
1,464 records set at Toronto Island 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, 43.63 latitude, -79.40 longitude.
Elevation: 77 m (253 ft).
Period of record: 1957 to 2006, 50 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 Toronto Island 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 Toronto Island A, 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)	-27.8 C (-18.0 F)	n/a	n/a
Feb	11.1 C (52.0 F)	-25.1 C (-13.2 F)	n/a	n/a
Mar	20.6 C (69.1 F)	-20.6 C (-5.1 F)	n/a	n/a
Apr	24.4 C (75.9 F)	-11.1 C (12.0 F)	n/a	n/a
May	32.2 C (90.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jun	34.5 C (94.1 F)	4.0 C (39.2 F)	n/a	n/a
Jul	35.8 C (96.4 F)	7.2 C (45.0 F)	n/a	n/a
Aug	36.1 C (97.0 F)	5.5 C (41.9 F)	n/a	n/a
Sep	33.4 C (92.1 F)	3.3 C (37.9 F)	n/a	n/a
Oct	28.3 C (82.9 F)	-3.3 C (26.1 F)	n/a	n/a
Nov	20.0 C (68.0 F)	-13.9 C (7.0 F)	n/a	n/a
Dec	16.3 C (61.3 F)	-25.0 C (-13.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Toronto Island A still stand. 1959 holds the most, with 84.

Standing records at Toronto Island A by the year they were set
Year set	Standing records
1957	55
1958	35
1959	84
1960	44
1961	54
1962	47
1963	70
1964	73
1965	68
1966	62
1967	65
1968	57
1969	35
1970	55
1971	42
1972	46
1973	67
1974	51
1975	55
1976	73
1977	48
1978	23
1979	55
1980	40
1981	50
1982	51
1983	59

Wettest Day of Each Month

Aug: 75.9 mm (3.0 in)

The wettest day on record for each calendar month at Toronto Island A. The most was 75.9 mm (3.0 in) on 30 August 1970.

Record daily precipitation for each month at Toronto Island A
Month	Record daily precipitation (mm)	Date
Jan	61.0 mm (2.4 in)	14 January 1968
Feb	31.5 mm (1.2 in)	1 February 1968
Mar	39.2 mm (1.5 in)	21 March 1980
Apr	36.2 mm (1.4 in)	14 April 1980
May	61.7 mm (2.4 in)	16 May 1974
Jun	51.1 mm (2.0 in)	28 June 1957
Jul	63.1 mm (2.5 in)	6 July 1977
Aug	75.9 mm (3.0 in)	30 August 1970
Sep	66.4 mm (2.6 in)	24 September 1977
Oct	43.7 mm (1.7 in)	23 October 1957
Nov	56.9 mm (2.2 in)	7 November 1977
Dec	45.8 mm (1.8 in)	25 December 1979

Period of Record Coverage

1957 to 1983

27 years of record at Toronto Island A, 1957 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1957.

Days with data per year at Toronto Island A
Year	Days with data	Share of year	Complete
1957	245	67%	No
1958	365	100%	Yes
1959	365	100%	Yes
1960	364	99%	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	365	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	366	100%	Yes
1977	363	99%	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

26 complete years, 1958 to 1983

One stripe for each of 26 complete years at Toronto Island A, 1958 to 1983. Blue stripes are years cooler than the station's own mean of 7.9 C (46.3 F); red stripes are warmer. The coolest year was 1976, at 6.9 C (44.4 F), and the warmest was 1983, at 8.9 C (48.1 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Toronto Island A as warming stripes, 1958 to 1983
Year	Annual mean temperature	Difference from the station mean
1958	7.4 C	-0.57 C
1959	8.3 C	+0.38 C
1960	7.8 C	-0.18 C
1961	8.3 C	+0.32 C
1962	7.9 C	+0.00 C
1963	7.5 C	-0.42 C
1964	8.1 C	+0.20 C
1965	7.5 C	-0.44 C
1966	8.0 C	+0.07 C
1967	7.8 C	-0.12 C
1968	7.8 C	-0.17 C
1969	8.3 C	+0.36 C
1970	8.2 C	+0.26 C
1971	8.4 C	+0.47 C
1972	7.4 C	-0.53 C
1973	8.9 C	+0.98 C
1974	7.9 C	-0.07 C
1975	8.6 C	+0.63 C
1976	6.9 C	-1.07 C
1977	7.6 C	-0.36 C
1978	7.7 C	-0.23 C
1979	7.9 C	+0.00 C
1980	7.6 C	-0.34 C
1981	8.0 C	+0.08 C
1982	7.6 C	-0.36 C
1983	8.9 C	+0.98 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

1957 to 1983

Yearly extremes at Toronto Island A: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.1 C (97.0 F)	1973	32.8 C (91.0 F)	27
Coldest night (TNn)	-27.8 C (-18.0 F)	1981	-21.1 C (-6.0 F)	27
Wettest day (Rx1day)	75.9 mm (3.0 in)	1970	43.9 mm (1.7 in)	27
Wettest five days (Rx5day)	114.5 mm (4.5 in)	1973	69.4 mm (2.7 in)	27
Longest dry spell (CDD)	31 days	1963	18 days	27

Hottest day (TXx)

The hottest day of the year at Toronto Island A, 1957 to 1983. The record is 36.1 C (97.0 F) in 1973, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at Toronto Island A by year
Year	Hottest day (TXx)
1957	31.7 C (89.1 F)
1958	30.6 C (87.1 F)
1959	32.8 C (91.0 F)
1960	31.1 C (88.0 F)
1961	30.0 C (86.0 F)
1962	32.2 C (90.0 F)
1963	32.8 C (91.0 F)
1964	34.4 C (93.9 F)
1965	33.3 C (91.9 F)
1966	35.0 C (95.0 F)
1967	28.9 C (84.0 F)
1968	31.7 C (89.1 F)
1969	33.3 C (91.9 F)
1970	31.7 C (89.1 F)
1971	33.3 C (91.9 F)
1972	32.8 C (91.0 F)
1973	36.1 C (97.0 F)
1974	33.3 C (91.9 F)
1975	32.8 C (91.0 F)
1976	31.1 C (88.0 F)
1977	34.1 C (93.4 F)
1978	34.5 C (94.1 F)
1979	29.7 C (85.5 F)
1980	31.0 C (87.8 F)
1981	33.4 C (92.1 F)
1982	30.5 C (86.9 F)
1983	35.8 C (96.4 F)

Coldest night (TNn)

The coldest night of the year at Toronto Island A, 1957 to 1983. The record is -27.8 C (-18.0 F) in 1981, marked on the chart; the median year is -21.1 C (-6.0 F).

Coldest night (TNn) at Toronto Island A by year
Year	Coldest night (TNn)
1957	-16.7 C (1.9 F)
1958	-22.2 C (-8.0 F)
1959	-20.6 C (-5.1 F)
1960	-20.0 C (-4.0 F)
1961	-24.4 C (-11.9 F)
1962	-22.8 C (-9.0 F)
1963	-22.2 C (-8.0 F)
1964	-21.1 C (-6.0 F)
1965	-21.7 C (-7.1 F)
1966	-20.0 C (-4.0 F)
1967	-22.8 C (-9.0 F)
1968	-22.8 C (-9.0 F)
1969	-17.8 C (0.0 F)
1970	-21.1 C (-6.0 F)
1971	-19.4 C (-2.9 F)
1972	-20.0 C (-4.0 F)
1973	-20.6 C (-5.1 F)
1974	-18.3 C (-0.9 F)
1975	-18.9 C (-2.0 F)
1976	-26.7 C (-16.1 F)
1977	-26.1 C (-15.0 F)
1978	-16.7 C (1.9 F)
1979	-25.1 C (-13.2 F)
1980	-25.0 C (-13.0 F)
1981	-27.8 C (-18.0 F)
1982	-23.8 C (-10.8 F)
1983	-20.1 C (-4.2 F)

Wettest day (Rx1day)

The wettest day of the year at Toronto Island A, 1957 to 1983. The record is 75.9 mm (3.0 in) in 1970, marked on the chart; the median year is 43.9 mm (1.7 in).

Wettest day (Rx1day) at Toronto Island A by year
Year	Wettest day (Rx1day)
1957	61.0 mm (2.4 in)
1958	49.3 mm (1.9 in)
1959	33.5 mm (1.3 in)
1960	55.9 mm (2.2 in)
1961	35.1 mm (1.4 in)
1962	50.0 mm (2.0 in)
1963	23.9 mm (0.9 in)
1964	58.9 mm (2.3 in)
1965	35.3 mm (1.4 in)
1966	34.5 mm (1.4 in)
1967	39.6 mm (1.6 in)
1968	61.0 mm (2.4 in)
1969	36.8 mm (1.4 in)
1970	75.9 mm (3.0 in)
1971	25.4 mm (1.0 in)
1972	43.9 mm (1.7 in)
1973	39.4 mm (1.6 in)
1974	61.7 mm (2.4 in)
1975	42.7 mm (1.7 in)
1976	51.1 mm (2.0 in)
1977	66.4 mm (2.6 in)
1978	34.7 mm (1.4 in)
1979	45.8 mm (1.8 in)
1980	39.2 mm (1.5 in)
1981	48.6 mm (1.9 in)
1982	44.8 mm (1.8 in)
1983	28.2 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Toronto Island A, 1957 to 1983. The record is 114.5 mm (4.5 in) in 1973, marked on the chart; the median year is 69.4 mm (2.7 in).

Wettest five days (Rx5day) at Toronto Island A by year
Year	Wettest five days (Rx5day)
1957	71.1 mm (2.8 in)
1958	72.8 mm (2.9 in)
1959	47.2 mm (1.9 in)
1960	86.3 mm (3.4 in)
1961	47.8 mm (1.9 in)
1962	90.7 mm (3.6 in)
1963	42.7 mm (1.7 in)
1964	86.1 mm (3.4 in)
1965	65.8 mm (2.6 in)
1966	70.6 mm (2.8 in)
1967	50.6 mm (2.0 in)
1968	83.8 mm (3.3 in)
1969	77.9 mm (3.1 in)
1970	75.9 mm (3.0 in)
1971	41.0 mm (1.6 in)
1972	59.7 mm (2.4 in)
1973	114.5 mm (4.5 in)
1974	96.0 mm (3.8 in)
1975	68.6 mm (2.7 in)
1976	63.5 mm (2.5 in)
1977	86.2 mm (3.4 in)
1978	69.4 mm (2.7 in)
1979	95.7 mm (3.8 in)
1980	52.8 mm (2.1 in)
1981	65.5 mm (2.6 in)
1982	61.5 mm (2.4 in)
1983	54.2 mm (2.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Toronto Island A, 1957 to 1983. The record is 31 days in 1963, marked on the chart; the median year is 18 days.

Longest dry spell (CDD) at Toronto Island A by year
Year	Longest dry spell (CDD)
1957	23 days
1958	15 days
1959	17 days
1960	30 days
1961	21 days
1962	24 days
1963	31 days
1964	17 days
1965	16 days
1966	25 days
1967	21 days
1968	24 days
1969	25 days
1970	17 days
1971	18 days
1972	14 days
1973	14 days
1974	17 days
1975	14 days
1976	24 days
1977	22 days
1978	17 days
1979	17 days
1980	16 days
1981	19 days
1982	17 days
1983	20 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

26 years with a frost

Across 26 years with a frost, the median last spring frost at Toronto Island A falls on 20 April and the median first autumn frost on 1 November, which leaves a median of 196 days between them.

Fitted over all years, the growing season changes by +1.6 days per decade at this station.

Frost dates and growing season at Toronto Island A
Measure	Median, all years	Earliest period	Recent period (1958 to 1983)	Recent against earliest	Fitted trend
Last spring frost	20 April	n/a	20 April	n/a	-1.0 days per decade
First autumn frost	1 November	n/a	1 November	n/a	+0.6 days per decade
Growing days	196 days	n/a	196 days	n/a	+1.6 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 Toronto Island A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Toronto Island 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).