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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Toronto Sunnybrook Threshold Days by Year

5 fixed thresholds counted per year at Toronto Sunnybrook (CA006158779): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Toronto Sunnybrook Thresholds

  • Toronto Sunnybrook: days with 10 cm (3.9 in) or more of snowfall in 19 years, most in 1965 with 6.
  • Toronto Sunnybrook: days with 10 mm (0.39 in) or more of precipitation in 16 years, most in 1977 with 36.
  • Toronto Sunnybrook: days with 25 mm (0.98 in) or more of precipitation in 16 years, most in 1964 with 6.
  • Toronto Sunnybrook: days with 50 mm (1.97 in) or more of precipitation in 5 years, most in 1964 with 1.
  • 5 fixed thresholds have at least one qualifying day at Toronto Sunnybrook.
16 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Toronto Sunnybrook Days per year at Toronto Sunnybrook with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 36 in 1977. 0102030401964: 241965: 311966: 251968: 291970: 261972: 241973: 221974: 151975: 171976: 241977: 361978: 191980: 191981: 201982: 271983: 3219641966197019731975197719801982
Days per year at Toronto Sunnybrook with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 36 in 1977.
Days with 10 mm (0.39 in) or more of precipitation per year at Toronto Sunnybrook
YearDaysDecade average
19642427.3
19653127.3
19662527.3
19682927.3
19702622.9
19722422.9
19732222.9
19741522.9
19751722.9
19762422.9
19773622.9
19781922.9
19801924.5
19812024.5
19822724.5
19833224.5
First to last qualifying date each year at Toronto Sunnybrook For each year, a bar from the first to the last day at Toronto Sunnybrook meeting 10 mm (0.39 in). 1964: 1 January 1964 to 24 December 19641965: 2 January 1965 to 24 December 19651966: 7 January 1966 to 10 December 19661968: 9 January 1968 to 27 December 19681970: 25 January 1970 to 16 December 19701972: 3 February 1972 to 15 December 19721973: 2 February 1973 to 26 December 19731974: 8 January 1974 to 2 December 19741975: 8 January 1975 to 20 December 19751976: 13 January 1976 to 6 December 19761977: 9 January 1977 to 20 December 19771978: 8 January 1978 to 31 December 19781980: 11 January 1980 to 2 December 19801981: 1 February 1981 to 19 November 19811982: 31 January 1982 to 19 December 19821983: 10 January 1983 to 28 December 198319641966197019731975197719801982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Toronto Sunnybrook meeting 10 mm (0.39 in).
First to last qualifying date each year at Toronto Sunnybrook
YearFirst dateLast date
19641964-01-011964-12-24
19651965-01-021965-12-24
19661966-01-071966-12-10
19681968-01-091968-12-27
19701970-01-251970-12-16
19721972-02-031972-12-15
19731973-02-021973-12-26
19741974-01-081974-12-02
19751975-01-081975-12-20
19761976-01-131976-12-06
19771977-01-091977-12-20
19781978-01-081978-12-31
19801980-01-111980-12-02
19811981-02-011981-11-19
19821982-01-311982-12-19
19831983-01-101983-12-28

Every Fixed Threshold

Fixed thresholds at Toronto Sunnybrook
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1636197732
25 mm (0.98 in): Days with 25 mm or more rain16619645
50 mm (1.97 in): Days with 50 mm or more rain5119641
10 cm (3.9 in): Days with 10 cm or more snowfall19619652
25 cm (9.8 in): Days with 25 cm or more snowfall2119681

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1964.

Download the Data

  • Data for Toronto Sunnybrook 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 (2025-12-31).