Toronto Island Weather Records (CA006158660)

Record envelope, standing records and threshold days for Toronto Island (CA006158660), Ontario, Canada, with 55 years of record.

Key Facts for Toronto Island

Toronto Island (CA006158660) is a weather station in Ontario, Canada at 43.62 latitude and -79.40 longitude, 78 m (256 ft) above sea level.
The station reports from 1905 to 1959, 55 years of record.
1,464 records set at Toronto Island 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, 43.62 latitude, -79.40 longitude.
Elevation: 78 m (256 ft).
Period of record: 1905 to 1959, 55 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. 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, 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)	-30.0 C (-22.0 F)	n/a	n/a
Feb	10.0 C (50.0 F)	-29.4 C (-20.9 F)	n/a	n/a
Mar	22.2 C (72.0 F)	-22.2 C (-8.0 F)	n/a	n/a
Apr	26.1 C (79.0 F)	-13.3 C (8.1 F)	n/a	n/a
May	32.2 C (90.0 F)	-3.3 C (26.1 F)	n/a	n/a
Jun	37.2 C (99.0 F)	2.2 C (36.0 F)	n/a	n/a
Jul	33.9 C (93.0 F)	4.4 C (39.9 F)	n/a	n/a
Aug	36.1 C (97.0 F)	5.0 C (41.0 F)	n/a	n/a
Sep	33.3 C (91.9 F)	1.7 C (35.1 F)	n/a	n/a
Oct	26.1 C (79.0 F)	-5.0 C (23.0 F)	n/a	n/a
Nov	19.4 C (66.9 F)	-12.8 C (9.0 F)	n/a	n/a
Dec	14.4 C (57.9 F)	-27.2 C (-17.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Toronto Island still stand. 1919 holds the most, with 77.

Standing records at Toronto Island by the year they were set
Year set	Standing records
1905	46
1906	57
1907	69
1908	46
1909	53
1910	39
1911	54
1912	41
1913	51
1914	61
1915	24
1916	60
1917	56
1918	73
1919	77
1920	61
1921	30
1922	49
1923	51
1924	30
1925	50
1926	53
1927	39
1953	50
1954	40
1955	60
1956	43
1957	33
1958	31
1959	37

Wettest Day of Each Month

Oct: 76.2 mm (3.0 in)

The wettest day on record for each calendar month at Toronto Island. The most was 76.2 mm (3.0 in) on 15 October 1954.

Record daily precipitation for each month at Toronto Island
Month	Record daily precipitation (mm)	Date
Jan	19.3 mm (0.8 in)	22 January 1957
Feb	16.0 mm (0.6 in)	14 February 1959
Mar	33.5 mm (1.3 in)	1 March 1954
Apr	43.7 mm (1.7 in)	15 April 1954
May	35.3 mm (1.4 in)	9 May 1956
Jun	68.3 mm (2.7 in)	28 June 1957
Jul	32.3 mm (1.3 in)	5 July 1955
Aug	63.2 mm (2.5 in)	13 August 1955
Sep	42.9 mm (1.7 in)	15 September 1958
Oct	76.2 mm (3.0 in)	15 October 1954
Nov	23.4 mm (0.9 in)	13 November 1958
Dec	20.6 mm (0.8 in)	2 December 1956

Period of Record Coverage

1905 to 1959

30 years of record at Toronto Island, 1905 to 1959. 6 years have data for under 90 percent of days and are left out of rankings: 1916, 1920, 1921, 1927, 1953, 1959.

Days with data per year at Toronto Island
Year	Days with data	Share of year	Complete
1905	346	95%	Yes
1906	365	100%	Yes
1907	365	100%	Yes
1908	366	100%	Yes
1909	365	100%	Yes
1910	365	100%	Yes
1911	364	100%	Yes
1912	366	100%	Yes
1913	365	100%	Yes
1914	365	100%	Yes
1915	365	100%	Yes
1916	304	83%	No
1917	365	100%	Yes
1918	365	100%	Yes
1919	365	100%	Yes
1920	213	58%	No
1921	153	42%	No
1922	365	100%	Yes
1923	365	100%	Yes
1924	366	100%	Yes
1925	365	100%	Yes
1926	365	100%	Yes
1927	243	67%	No
1953	234	64%	No
1954	350	96%	Yes
1955	347	95%	Yes
1956	353	96%	Yes
1957	362	99%	Yes
1958	359	98%	Yes
1959	258	71%	No

Latest Records

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

Climate Trend

23 complete years, 1906 to 1958

One stripe for each of 23 complete years at Toronto Island, 1906 to 1958. Blue stripes are years cooler than the station's own mean of 7.5 C (45.4 F); red stripes are warmer. The coolest year was 1907, at 5.8 C (42.5 F), and the warmest was 1955, at 9.0 C (48.2 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Toronto Island as warming stripes, 1906 to 1958
Year	Annual mean temperature	Difference from the station mean
1906	7.6 C	+0.08 C
1907	5.8 C	-1.66 C
1908	7.3 C	-0.21 C
1909	7.1 C	-0.40 C
1910	7.4 C	-0.09 C
1911	7.7 C	+0.26 C
1912	6.4 C	-1.04 C
1913	8.4 C	+0.95 C
1914	7.4 C	-0.03 C
1915	7.9 C	+0.38 C
1917	6.2 C	-1.24 C
1918	7.0 C	-0.43 C
1919	8.3 C	+0.82 C
1922	8.9 C	+1.45 C
1923	7.3 C	-0.16 C
1924	7.0 C	-0.48 C
1925	7.5 C	+0.04 C
1926	6.2 C	-1.25 C
1954	8.1 C	+0.67 C
1955	9.0 C	+1.55 C
1956	7.6 C	+0.09 C
1957	8.2 C	+0.69 C
1958	7.5 C	-0.01 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

1905 to 1959

Yearly extremes at Toronto Island: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	1919	31.4 C (88.5 F)	30
Coldest night (TNn)	-30.0 C (-22.0 F)	1914	-22.2 C (-8.0 F)	30
Wettest day (Rx1day)	76.2 mm (3.0 in)	1954	43.7 mm (1.7 in)	7
Wettest five days (Rx5day)	116.6 mm (4.6 in)	1955	76.7 mm (3.0 in)	7
Longest dry spell (CDD)	24 days	1954	18 days	7

Hottest day (TXx)

The hottest day of the year at Toronto Island, 1905 to 1959. The record is 37.2 C (99.0 F) in 1919, marked on the chart; the median year is 31.4 C (88.5 F).

Hottest day (TXx) at Toronto Island by year
Year	Hottest day (TXx)
1905	30.0 C (86.0 F)
1906	28.9 C (84.0 F)
1907	29.4 C (84.9 F)
1908	31.1 C (88.0 F)
1909	35.0 C (95.0 F)
1910	29.4 C (84.9 F)
1911	33.3 C (91.9 F)
1912	30.6 C (87.1 F)
1913	32.2 C (90.0 F)
1914	33.9 C (93.0 F)
1915	30.6 C (87.1 F)
1916	24.4 C (75.9 F)
1917	32.8 C (91.0 F)
1918	36.1 C (97.0 F)
1919	37.2 C (99.0 F)
1920	32.2 C (90.0 F)
1921	31.1 C (88.0 F)
1922	32.2 C (90.0 F)
1923	32.2 C (90.0 F)
1924	29.4 C (84.9 F)
1925	33.3 C (91.9 F)
1926	31.1 C (88.0 F)
1927	31.7 C (89.1 F)
1953	33.3 C (91.9 F)
1954	30.0 C (86.0 F)
1955	31.7 C (89.1 F)
1956	31.1 C (88.0 F)
1957	29.4 C (84.9 F)
1958	28.9 C (84.0 F)
1959	31.7 C (89.1 F)

Coldest night (TNn)

The coldest night of the year at Toronto Island, 1905 to 1959. The record is -30.0 C (-22.0 F) in 1914, marked on the chart; the median year is -22.2 C (-8.0 F).

Coldest night (TNn) at Toronto Island by year
Year	Coldest night (TNn)
1905	-21.7 C (-7.1 F)
1906	-24.4 C (-11.9 F)
1907	-23.3 C (-9.9 F)
1908	-27.8 C (-18.0 F)
1909	-21.7 C (-7.1 F)
1910	-23.9 C (-11.0 F)
1911	-18.3 C (-0.9 F)
1912	-28.3 C (-18.9 F)
1913	-19.4 C (-2.9 F)
1914	-30.0 C (-22.0 F)
1915	-18.9 C (-2.0 F)
1916	-23.3 C (-9.9 F)
1917	-27.2 C (-17.0 F)
1918	-29.4 C (-20.9 F)
1919	-23.3 C (-9.9 F)
1920	-29.4 C (-20.9 F)
1921	-16.7 C (1.9 F)
1922	-21.1 C (-6.0 F)
1923	-24.4 C (-11.9 F)
1924	-20.0 C (-4.0 F)
1925	-26.7 C (-16.1 F)
1926	-20.6 C (-5.1 F)
1927	-27.2 C (-17.0 F)
1953	-16.7 C (1.9 F)
1954	-20.6 C (-5.1 F)
1955	-22.2 C (-8.0 F)
1956	-17.8 C (0.0 F)
1957	-22.2 C (-8.0 F)
1958	-21.7 C (-7.1 F)
1959	-18.9 C (-2.0 F)

Wettest day (Rx1day)

The wettest day of the year at Toronto Island, 1905 to 1959. The record is 76.2 mm (3.0 in) in 1954, marked on the chart; the median year is 43.7 mm (1.7 in).

Wettest day (Rx1day) at Toronto Island by year
Year	Wettest day (Rx1day)
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1953	30.7 mm (1.2 in)
1954	76.2 mm (3.0 in)
1955	63.2 mm (2.5 in)
1956	43.7 mm (1.7 in)
1957	68.3 mm (2.7 in)
1958	42.9 mm (1.7 in)
1959	35.8 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Toronto Island, 1905 to 1959. The record is 116.6 mm (4.6 in) in 1955, marked on the chart; the median year is 76.7 mm (3.0 in).

Wettest five days (Rx5day) at Toronto Island by year
Year	Wettest five days (Rx5day)
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1953	38.8 mm (1.5 in)
1954	106.7 mm (4.2 in)
1955	116.6 mm (4.6 in)
1956	76.7 mm (3.0 in)
1957	87.1 mm (3.4 in)
1958	63.3 mm (2.5 in)
1959	42.1 mm (1.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Toronto Island, 1905 to 1959. The record is 24 days in 1954, marked on the chart; the median year is 18 days.

Longest dry spell (CDD) at Toronto Island by year
Year	Longest dry spell (CDD)
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1953	17 days
1954	24 days
1955	18 days
1956	19 days
1957	23 days
1958	15 days
1959	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

23 years with a frost

Across 23 years with a frost, the median last spring frost at Toronto Island falls on 30 April and the median first autumn frost on 23 October, which leaves a median of 174 days between them.

Frost dates and growing season at Toronto Island
Measure	Median, all years	Earliest period	Recent period (1906 to 1958)	Recent against earliest	Fitted trend
Last spring frost	30 April	n/a	30 April	n/a	n/a
First autumn frost	23 October	n/a	23 October	n/a	n/a
Growing days	174 days	n/a	174 days	n/a	n/a

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 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Toronto Island 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).