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Built 2026-10-19 (19 October 2026)

Toronto Island A Threshold Days by Year (CA006158665)

13 fixed thresholds counted per year at Toronto Island A (CA006158665): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Toronto Island A Thresholds

  • Toronto Island A: days with a maximum temperature at or below 0 C (32 F) in 26 years, most in 1960 with 76.
  • Toronto Island A: nights with a minimum temperature at or below 0 C (32 F) in 26 years, most in 1976 with 144.
  • Toronto Island A: nights with a minimum temperature at or below -10 C (14 F) in 26 years, most in 1963 with 44.
  • Toronto Island A: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1977 with 35.
  • 13 fixed thresholds have at least one qualifying day at Toronto Island A.
24 years with a qualifying day
Days at or above 30 C (86 F) per year at Toronto Island A Days per year at Toronto Island A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 19 in 1959. 051015201958: 21959: 191960: 31961: 21962: 31963: 111964: 81965: 21966: 131968: 51969: 101970: 41971: 51972: 51973: 101974: 31975: 31976: 41977: 21978: 51980: 31981: 51982: 31983: 1019581961196419681971197419771981
Days per year at Toronto Island A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 19 in 1959.
Days at or above 30 C (86 F) per year at Toronto Island A
YearDaysDecade average
1958210.5
19591910.5
196036.3
196126.3
196236.3
1963116.3
196486.3
196526.3
1966136.3
196856.3
1969106.3
197044.6
197154.6
197254.6
1973104.6
197434.6
197534.6
197644.6
197724.6
197854.6
198035.3
198155.3
198235.3
1983105.3
First to last qualifying date each year at Toronto Island A For each year, a bar from the first to the last day at Toronto Island A meeting 30 C (86 F). 1958: 2 July 1958 to 3 August 19581959: 8 June 1959 to 9 September 19591960: 1 September 1960 to 8 September 19601961: 29 June 1961 to 23 July 19611962: 18 May 1962 to 7 August 19621963: 9 June 1963 to 28 July 19631964: 22 May 1964 to 28 July 19641965: 24 July 1965 to 15 August 19651966: 23 June 1966 to 2 September 19661968: 16 July 1968 to 20 August 19681969: 28 May 1969 to 6 September 19691970: 11 June 1970 to 26 August 19701971: 29 June 1971 to 20 August 19711972: 12 July 1972 to 24 July 19721973: 11 June 1973 to 5 September 19731974: 7 July 1974 to 9 July 19741975: 2 July 1975 to 8 July 19751976: 7 June 1976 to 11 July 19761977: 28 May 1977 to 20 July 19771978: 27 June 1978 to 6 September 19781980: 11 July 1980 to 6 August 19801981: 7 July 1981 to 13 July 19811982: 7 July 1982 to 26 July 19821983: 23 June 1983 to 10 September 198319581961196419681971197419771981JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Toronto Island A meeting 30 C (86 F).
First to last qualifying date each year at Toronto Island A
YearFirst dateLast date
19581958-07-021958-08-03
19591959-06-081959-09-09
19601960-09-011960-09-08
19611961-06-291961-07-23
19621962-05-181962-08-07
19631963-06-091963-07-28
19641964-05-221964-07-28
19651965-07-241965-08-15
19661966-06-231966-09-02
19681968-07-161968-08-20
19691969-05-281969-09-06
19701970-06-111970-08-26
19711971-06-291971-08-20
19721972-07-121972-07-24
19731973-06-111973-09-05
19741974-07-071974-07-09
19751975-07-021975-07-08
19761976-06-071976-07-11
19771977-05-281977-07-20
19781978-06-271978-09-06
19801980-07-111980-08-06
19811981-07-071981-07-13
19821982-07-071982-07-26
19831983-06-231983-09-10

Every Fixed Threshold

Fixed thresholds at Toronto Island A
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2419195910
35 C (95 F): Days3219832
90 F (32.2 C): Days16619596
0 C (32 F): Ice days (max2676196041
0 C (32 F): Frost days (min261441976102
-10 C (14 F): Days with min2644196324
-20 C (-4 F): Days with min21819792
20 C (68 F): Tropical nights (min2525197317
10 mm (0.39 in): Days with 10 mm or more rain2635197729
25 mm (0.98 in): Days with 25 mm or more rain25819623
50 mm (1.97 in): Days with 50 mm or more rain8319683
10 cm (3.9 in): Days with 10 cm or more snowfall21519651
25 cm (9.8 in): Days with 25 cm or more snowfall2119661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1958.

Download the Data

  • 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-17).