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Built 2026-10-19 (19 October 2026)

St Catharines Cda Threshold Days by Year (CA006137301)

16 fixed thresholds counted per year at St Catharines Cda (CA006137301): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for St Catharines Cda Thresholds

  • St Catharines Cda: days with a maximum temperature at or above 30 C (86 F) in 33 years, most in 1959 with 40.
  • St Catharines Cda: days with a maximum temperature at or below 0 C (32 F) in 33 years, most in 1960 with 71.
  • St Catharines Cda: nights with a minimum temperature at or below 0 C (32 F) in 33 years, most in 1940 with 155.
  • St Catharines Cda: nights with a minimum temperature at or below -10 C (14 F) in 33 years, most in 1934 with 46.
  • 16 fixed thresholds have at least one qualifying day at St Catharines Cda.
33 years with a qualifying day
Days at or above 30 C (86 F) per year at St Catharines Cda Days per year at St Catharines Cda with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1959. 0102030401929: 251930: 311931: 271932: 121933: 311934: 281935: 241936: 311937: 241938: 241939: 271940: 181941: 331942: 131943: 221944: 311945: 251946: 221947: 191948: 161949: 321950: 121951: 111952: 271953: 251954: 151956: 101957: 131958: 71959: 401960: 131961: 161962: 19192919331937194119451949195319581962
Days per year at St Catharines Cda with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1959.
Days at or above 30 C (86 F) per year at St Catharines Cda
YearDaysDecade average
19292525
19303125.9
19312725.9
19321225.9
19333125.9
19342825.9
19352425.9
19363125.9
19372425.9
19382425.9
19392725.9
19401823.1
19413323.1
19421323.1
19432223.1
19443123.1
19452523.1
19462223.1
19471923.1
19481623.1
19493223.1
19501217.8
19511117.8
19522717.8
19532517.8
19541517.8
19561017.8
19571317.8
1958717.8
19594017.8
19601316
19611616
19621916
First to last qualifying date each year at St Catharines Cda For each year, a bar from the first to the last day at St Catharines Cda meeting 30 C (86 F). 1929: 29 May 1929 to 5 September 19291930: 7 May 1930 to 14 September 19301931: 14 June 1931 to 22 September 19311932: 18 June 1932 to 13 September 19321933: 26 May 1933 to 8 September 19331934: 20 May 1934 to 19 August 19341935: 2 June 1935 to 20 August 19351936: 8 May 1936 to 23 September 19361937: 7 July 1937 to 24 September 19371938: 20 June 1938 to 29 August 19381939: 27 May 1939 to 16 September 19391940: 7 June 1940 to 20 September 19401941: 21 May 1941 to 7 October 19411942: 10 June 1942 to 17 September 19421943: 4 June 1943 to 6 September 19431944: 26 May 1944 to 21 August 19441945: 14 June 1945 to 10 September 19451946: 24 June 1946 to 28 September 19461947: 11 June 1947 to 11 September 19471948: 23 June 1948 to 30 August 19481949: 4 May 1949 to 27 August 19491950: 8 June 1950 to 27 August 19501951: 31 May 1951 to 12 September 19511952: 24 June 1952 to 14 September 19521953: 10 May 1953 to 4 September 19531954: 10 June 1954 to 5 September 19541956: 11 June 1956 to 31 August 19561957: 16 June 1957 to 11 August 19571958: 1 July 1958 to 14 August 19581959: 8 June 1959 to 28 September 19591960: 28 June 1960 to 8 September 19601961: 12 June 1961 to 14 September 19611962: 15 May 1962 to 31 August 19621929193419391944194919541960JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at St Catharines Cda meeting 30 C (86 F).
First to last qualifying date each year at St Catharines Cda
YearFirst dateLast date
19291929-05-291929-09-05
19301930-05-071930-09-14
19311931-06-141931-09-22
19321932-06-181932-09-13
19331933-05-261933-09-08
19341934-05-201934-08-19
19351935-06-021935-08-20
19361936-05-081936-09-23
19371937-07-071937-09-24
19381938-06-201938-08-29
19391939-05-271939-09-16
19401940-06-071940-09-20
19411941-05-211941-10-07
19421942-06-101942-09-17
19431943-06-041943-09-06
19441944-05-261944-08-21
19451945-06-141945-09-10
19461946-06-241946-09-28
19471947-06-111947-09-11
19481948-06-231948-08-30
19491949-05-041949-08-27
19501950-06-081950-08-27
19511951-05-311951-09-12
19521952-06-241952-09-14
19531953-05-101953-09-04
19541954-06-101954-09-05
19561956-06-111956-08-31
19571957-06-161957-08-11
19581958-07-011958-08-14
19591959-06-081959-09-28
19601960-06-281960-09-08
19611961-06-121961-09-14
19621962-05-151962-08-31

Every Fixed Threshold

Fixed thresholds at St Catharines Cda
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3340195919
35 C (95 F): Days11619362
40 C (104 F): Days1119361
90 F (32.2 C): Days321819446
100 F (37.8 C): Days1419364
0 C (32 F): Ice days (max3371196048
0 C (32 F): Frost days (min331551940151
-10 C (14 F): Days with min3346193442
-20 C (-4 F): Days with min8619341
20 C (68 F): Tropical nights (min333419492
25 C (77 F): Days with min7219572
10 mm (0.39 in): Days with 10 mm or more rain3335193218
25 mm (0.98 in): Days with 25 mm or more rain331019457
50 mm (1.97 in): Days with 50 mm or more rain10219422
10 cm (3.9 in): Days with 10 cm or more snowfall31719511
25 cm (9.8 in): Days with 25 cm or more snowfall7219441

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1929.

Download the Data

  • Data for St Catharines Cda 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).