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Built 2026-10-19 (19 October 2026)

St Catharines A Threshold Days by Year (CA006137287)

13 fixed thresholds counted per year at St Catharines A (CA006137287): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for St Catharines A Thresholds

  • St Catharines A: days with a maximum temperature at or above 30 C (86 F) in 12 years, most in 1983 with 30.
  • St Catharines A: days with a maximum temperature at or below 0 C (32 F) in 12 years, most in 1978 with 74.
  • St Catharines A: nights with a minimum temperature at or below 0 C (32 F) in 12 years, most in 1976 with 148.
  • St Catharines A: nights with a minimum temperature at or below -10 C (14 F) in 12 years, most in 1978 with 53.
  • 13 fixed thresholds have at least one qualifying day at St Catharines A.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at St Catharines A Days per year at St Catharines A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 30 in 1983. 01020301972: 101973: 261974: 141975: 181976: 71977: 111978: 221979: 131980: 111981: 91982: 91983: 30197219741976197819801982
Days per year at St Catharines A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 30 in 1983.
Days at or above 30 C (86 F) per year at St Catharines A
YearDaysDecade average
19721015.1
19732615.1
19741415.1
19751815.1
1976715.1
19771115.1
19782215.1
19791315.1
19801114.8
1981914.8
1982914.8
19833014.8
First to last qualifying date each year at St Catharines A For each year, a bar from the first to the last day at St Catharines A meeting 30 C (86 F). 1972: 11 July 1972 to 17 September 19721973: 11 June 1973 to 5 September 19731974: 9 June 1974 to 23 August 19741975: 15 June 1975 to 2 August 19751976: 8 June 1976 to 11 July 19761977: 17 May 1977 to 1 September 19771978: 29 May 1978 to 6 September 19781979: 8 May 1979 to 1 September 19791980: 26 June 1980 to 27 August 19801981: 15 June 1981 to 19 July 19811982: 6 July 1982 to 26 July 19821983: 12 June 1983 to 10 September 1983197219741976197819801982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at St Catharines A meeting 30 C (86 F).
First to last qualifying date each year at St Catharines A
YearFirst dateLast date
19721972-07-111972-09-17
19731973-06-111973-09-05
19741974-06-091974-08-23
19751975-06-151975-08-02
19761976-06-081976-07-11
19771977-05-171977-09-01
19781978-05-291978-09-06
19791979-05-081979-09-01
19801980-06-261980-08-27
19811981-06-151981-07-19
19821982-07-061982-07-26
19831983-06-121983-09-10

Every Fixed Threshold

Fixed thresholds at St Catharines A
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1230198330
35 C (95 F): Days3119731
90 F (32.2 C): Days101019736
0 C (32 F): Ice days (max1274197841
0 C (32 F): Frost days (min121481976115
-10 C (14 F): Days with min1253197825
-20 C (-4 F): Days with min5419792
20 C (68 F): Tropical nights (min1226197317
10 mm (0.39 in): Days with 10 mm or more rain1238197732
25 mm (0.98 in): Days with 25 mm or more rain121019773
50 mm (1.97 in): Days with 50 mm or more rain3319813
10 cm (3.9 in): Days with 10 cm or more snowfall10419722
25 cm (9.8 in): Days with 25 cm or more snowfall1119781

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1972.

Download the Data

  • Data for St Catharines 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).