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Data as of 2026-10-16
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Built 2026-10-17 (17 October 2026)

Port Colborne Threshold Days by Year

13 fixed thresholds counted per year at Port Colborne (CA006136606): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Port Colborne Thresholds

  • Port Colborne: days with a maximum temperature at or below 0 C (32 F) in 19 years, most in 1978 with 74.
  • Port Colborne: nights with a minimum temperature at or below 0 C (32 F) in 19 years, most in 1978 with 149.
  • Port Colborne: nights with a minimum temperature at or below -10 C (14 F) in 19 years, most in 1978 with 59.
  • Port Colborne: nights with a minimum temperature at or above 20 C (68 F) in 19 years, most in 1973 with 32.
  • 13 fixed thresholds have at least one qualifying day at Port Colborne.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Port Colborne Days per year at Port Colborne with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 5 in 1983. 02461966: 31967: 21968: 41970: 31971: 21972: 11973: 31975: 21978: 41979: 11982: 21983: 5196619681971197319781982
Days per year at Port Colborne with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 5 in 1983.
Days at or above 30 C (86 F) per year at Port Colborne
YearDaysDecade average
196633
196723
196843
197032.3
197122.3
197212.3
197332.3
197522.3
197842.3
197912.3
198223.5
198353.5
First to last qualifying date each year at Port Colborne For each year, a bar from the first to the last day at Port Colborne meeting 30 C (86 F). 1966: 24 June 1966 to 1 July 19661967: 3 June 1967 to 13 June 19671968: 8 June 1968 to 5 August 19681970: 8 August 1970 to 11 August 19701971: 29 June 1971 to 6 September 19711972: 12 July 1972 to 12 July 19721973: 23 July 1973 to 4 September 19731975: 29 June 1975 to 6 July 19751978: 27 May 1978 to 19 August 19781979: 13 July 1979 to 13 July 19791982: 10 July 1982 to 13 September 19821983: 14 June 1983 to 25 July 1983196619681971197319781982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Port Colborne meeting 30 C (86 F).
First to last qualifying date each year at Port Colborne
YearFirst dateLast date
19661966-06-241966-07-01
19671967-06-031967-06-13
19681968-06-081968-08-05
19701970-08-081970-08-11
19711971-06-291971-09-06
19721972-07-121972-07-12
19731973-07-231973-09-04
19751975-06-291975-07-06
19781978-05-271978-08-19
19791979-07-131979-07-13
19821982-07-101982-09-13
19831983-06-141983-07-25

Every Fixed Threshold

Fixed thresholds at Port Colborne
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days12519835
90 F (32.2 C): Days1119791
0 C (32 F): Ice days (max1974197843
0 C (32 F): Frost days (min191491978121
-10 C (14 F): Days with min1959197825
-20 C (-4 F): Days with min16819795
20 C (68 F): Tropical nights (min1932197332
10 mm (0.39 in): Days with 10 mm or more rain1950197734
25 mm (0.98 in): Days with 25 mm or more rain191019725
50 mm (1.97 in): Days with 50 mm or more rain3219681
100 mm (3.94 in): Days with 100 mm or more rain1119681
10 cm (3.9 in): Days with 10 cm or more snowfall18919701
25 cm (9.8 in): Days with 25 cm or more snowfall10219692

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1966.

Download the Data

  • Data for Port Colborne 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-16).