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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Toronto Island Threshold Days by Year (CA006158660)

13 fixed thresholds counted per year at Toronto Island (CA006158660): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Toronto Island Thresholds

  • Toronto Island: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1917 with 154.
  • Toronto Island: nights with a minimum temperature at or below -10 C (14 F) in 25 years, most in 1917 with 57.
  • Toronto Island: days with a maximum temperature at or below 0 C (32 F) in 24 years, most in 1912 with 67.
  • Toronto Island: nights with a minimum temperature at or below -20 C (-4 F) in 21 years, most in 1918 with 11.
  • 13 fixed thresholds have at least one qualifying day at Toronto Island.
18 years with a qualifying day
Days at or above 30 C (86 F) per year at Toronto Island Days per year at Toronto Island with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 1919. 01020301905: 11908: 11909: 31911: 71912: 11913: 61914: 61915: 11917: 81918: 171919: 261922: 91923: 81925: 51926: 21954: 21955: 61956: 1190519091912191419171919192319261955
Days per year at Toronto Island with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 1919.
Days at or above 30 C (86 F) per year at Toronto Island
YearDaysDecade average
190511.7
190811.7
190931.7
191179
191219
191369
191469
191519
191789
1918179
1919269
192296
192386
192556
192626
195423
195563
195613
First to last qualifying date each year at Toronto Island For each year, a bar from the first to the last day at Toronto Island meeting 30 C (86 F). 1905: 19 July 1905 to 19 July 19051908: 12 July 1908 to 12 July 19081909: 8 July 1909 to 26 August 19091911: 22 June 1911 to 8 August 19111912: 29 June 1912 to 29 June 19121913: 16 June 1913 to 18 August 19131914: 10 June 1914 to 7 August 19141915: 14 July 1915 to 14 July 19151917: 22 July 1917 to 1 August 19171918: 14 July 1918 to 26 August 19181919: 29 May 1919 to 27 July 19191922: 28 July 1922 to 5 September 19221923: 21 June 1923 to 7 August 19231925: 1 June 1925 to 31 August 19251926: 8 July 1926 to 9 July 19261954: 30 July 1954 to 24 August 19541955: 22 July 1955 to 21 August 19551956: 13 June 1956 to 13 June 1956190519111914191819231954JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Toronto Island meeting 30 C (86 F).
First to last qualifying date each year at Toronto Island
YearFirst dateLast date
19051905-07-191905-07-19
19081908-07-121908-07-12
19091909-07-081909-08-26
19111911-06-221911-08-08
19121912-06-291912-06-29
19131913-06-161913-08-18
19141914-06-101914-08-07
19151915-07-141915-07-14
19171917-07-221917-08-01
19181918-07-141918-08-26
19191919-05-291919-07-27
19221922-07-281922-09-05
19231923-06-211923-08-07
19251925-06-011925-08-31
19261926-07-081926-07-09
19541954-07-301954-08-24
19551955-07-221955-08-21
19561956-06-131956-06-13

Every Fixed Threshold

Fixed thresholds at Toronto Island
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days182619191
35 C (95 F): Days3219192
90 F (32.2 C): Days101219192
0 C (32 F): Ice days (max2467191257
0 C (32 F): Frost days (min251541917106
-10 C (14 F): Days with min2557191732
-20 C (-4 F): Days with min211119181
-30 C (-22 F): Days with min1119141
20 C (68 F): Tropical nights (min172819552
10 mm (0.39 in): Days with 10 mm or more rain427195615
25 mm (0.98 in): Days with 25 mm or more rain4819562
50 mm (1.97 in): Days with 50 mm or more rain2119551
10 cm (3.9 in): Days with 10 cm or more snowfall4319551

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.

Download the Data

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

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