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St Catharines A Weather Records (CA006137287)

Record envelope, standing records and threshold days for St Catharines A (CA006137287), Ontario, Canada, with 30 years of record.

Key Facts for St Catharines A

  • St Catharines A (CA006137287) is a weather station in Ontario, Canada at 43.20 latitude and -79.17 longitude, 98 m (322 ft) above sea level.
  • The station reports from 1971 to 2000, 30 years of record.
  • 1,464 records set at St Catharines A still stand.
  • Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

  • Location: Ontario, Canada, 43.20 latitude, -79.17 longitude.
  • Elevation: 98 m (322 ft).
  • Period of record: 1971 to 2000, 30 years.
  • Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at St Catharines A, with 2026 drawn through them The band shows the record high and record low for each calendar day at St Catharines A. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at St Catharines A. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at St Catharines A, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan14.4 C (57.9 F)-23.6 C (-10.5 F)n/an/a
Feb15.6 C (60.1 F)-25.7 C (-14.3 F)n/an/a
Mar24.6 C (76.3 F)-17.7 C (0.1 F)n/an/a
Apr28.9 C (84.0 F)-9.1 C (15.6 F)n/an/a
May32.1 C (89.8 F)-1.7 C (28.9 F)n/an/a
Jun32.9 C (91.2 F)1.7 C (35.1 F)n/an/a
Jul35.7 C (96.3 F)8.3 C (46.9 F)n/an/a
Aug35.6 C (96.1 F)2.6 C (36.7 F)n/an/a
Sep33.3 C (91.9 F)0.6 C (33.1 F)n/an/a
Oct28.9 C (84.0 F)-5.0 C (23.0 F)n/an/a
Nov22.2 C (72.0 F)-10.6 C (12.9 F)n/an/a
Dec21.9 C (71.4 F)-22.5 C (-8.5 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at St Catharines A by the year they were set 1,464 records at St Catharines A still stand. 1976 holds the most, with 159. 0501001502001971: 791972: 1081973: 1291974: 1161975: 1101976: 1591977: 1101978: 1001979: 1141980: 1081981: 971982: 1151983: 1191971197319751977197919811983
1,464 records at St Catharines A still stand. 1976 holds the most, with 159.
Standing records at St Catharines A by the year they were set
Year setStanding records
197179
1972108
1973129
1974116
1975110
1976159
1977110
1978100
1979114
1980108
198197
1982115
1983119

Wettest Day of Each Month

Sep: 67.0 mm (2.6 in)
Record daily precipitation for each month at St Catharines A The wettest day on record for each calendar month at St Catharines A. The most was 67.0 mm (2.6 in) on 14 September 1979. 020406080 Jan: 30.0 mm (1.2 in), 24 January 1979 Jan Feb: 26.9 mm (1.1 in), 13 February 1972 Feb Mar: 42.4 mm (1.7 in), 17 March 1973 Mar Apr: 49.3 mm (1.9 in), 25 April 1976 Apr May: 42.9 mm (1.7 in), 6 May 1976 May Jun: 65.2 mm (2.6 in), 22 June 1981 Jun Jul: 66.0 mm (2.6 in), 13 July 1971 Jul Aug: 50.3 mm (2.0 in), 14 August 1972 Aug Sep: 67.0 mm (2.6 in), 14 September 1979 Sep Oct: 36.8 mm (1.4 in), 25 October 1980 Oct Nov: 48.0 mm (1.9 in), 15 November 1973 Nov Dec: 33.4 mm (1.3 in), 25 December 1979 Dec
The wettest day on record for each calendar month at St Catharines A. The most was 67.0 mm (2.6 in) on 14 September 1979.
Record daily precipitation for each month at St Catharines A
MonthRecord daily precipitation (mm)Date
Jan30.0 mm (1.2 in)24 January 1979
Feb26.9 mm (1.1 in)13 February 1972
Mar42.4 mm (1.7 in)17 March 1973
Apr49.3 mm (1.9 in)25 April 1976
May42.9 mm (1.7 in)6 May 1976
Jun65.2 mm (2.6 in)22 June 1981
Jul66.0 mm (2.6 in)13 July 1971
Aug50.3 mm (2.0 in)14 August 1972
Sep67.0 mm (2.6 in)14 September 1979
Oct36.8 mm (1.4 in)25 October 1980
Nov48.0 mm (1.9 in)15 November 1973
Dec33.4 mm (1.3 in)25 December 1979

Period of Record Coverage

1971 to 1983
Days with data per year at St Catharines A 13 years of record at St Catharines A, 1971 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1971. 1971: 193 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 364 of 365 days1982: 365 of 365 days1983: 361 of 365 days19751980
13 years of record at St Catharines A, 1971 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1971.
Days with data per year at St Catharines A
YearDays with dataShare of yearComplete
197119353%No
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981364100%Yes
1982365100%Yes
198336199%Yes

Latest Records

0

No records were set at this station in the latest data.

Climate Trend

12 complete years, 1972 to 1983
Annual mean temperature at St Catharines A as warming stripes, 1972 to 1983 One stripe for each of 12 complete years at St Catharines A, 1972 to 1983. Blue stripes are years cooler than the station's own mean of 8.5 C (47.3 F); red stripes are warmer. The coolest year was 1978, at 7.8 C (46.0 F), and the warmest was 1973, at 9.6 C (49.3 F). The strongest colour marks a difference of 1.2 C (2.2 F). 1972: 7.9 C, -0.6 C from the station mean1973: 9.6 C, +1.1 C from the station mean1974: 8.5 C, -0.1 C from the station mean1975: 9.3 C, +0.8 C from the station mean1976: 8.0 C, -0.5 C from the station mean1977: 8.6 C, 0.0 C from the station mean1978: 7.8 C, -0.7 C from the station mean1979: 8.3 C, -0.2 C from the station mean1980: 8.2 C, -0.4 C from the station mean1981: 8.6 C, +0.1 C from the station mean1982: 8.3 C, -0.3 C from the station mean1983: 9.2 C, +0.7 C from the station mean197219741976197819801982
One stripe for each of 12 complete years at St Catharines A, 1972 to 1983. Blue stripes are years cooler than the station's own mean of 8.5 C (47.3 F); red stripes are warmer. The coolest year was 1978, at 7.8 C (46.0 F), and the warmest was 1973, at 9.6 C (49.3 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at St Catharines A as warming stripes, 1972 to 1983
YearAnnual mean temperatureDifference from the station mean
19727.9 C-0.57 C
19739.6 C+1.11 C
19748.5 C-0.06 C
19759.3 C+0.83 C
19768.0 C-0.54 C
19778.6 C+0.04 C
19787.8 C-0.74 C
19798.3 C-0.20 C
19808.2 C-0.35 C
19818.6 C+0.07 C
19828.3 C-0.26 C
19839.2 C+0.68 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1971 to 1983
Yearly extremes at St Catharines A: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)35.7 C (96.3 F)198333.3 C (91.9 F)13
Coldest night (TNn)-25.7 C (-14.3 F)1979-19.4 C (-2.9 F)13
Wettest day (Rx1day)67.0 mm (2.6 in)197946.2 mm (1.8 in)13
Wettest five days (Rx5day)92.2 mm (3.6 in)197671.4 mm (2.8 in)13
Longest dry spell (CDD)22 days197516 days13

Hottest day (TXx)

Hottest day (TXx) at St Catharines A by year The hottest day of the year at St Catharines A, 1971 to 1983. The record is 35.7 C (96.3 F) in 1983, marked on the chart; the median year is 33.3 C (91.9 F). 31323334353619751980Record: 35.7 C (96.3 F) in 1983
The hottest day of the year at St Catharines A, 1971 to 1983. The record is 35.7 C (96.3 F) in 1983, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at St Catharines A by year
YearHottest day (TXx)
197132.2 C (90.0 F)
197233.3 C (91.9 F)
197335.6 C (96.1 F)
197433.3 C (91.9 F)
197534.4 C (93.9 F)
197631.7 C (89.1 F)
197735.6 C (96.1 F)
197834.9 C (94.8 F)
197931.7 C (89.1 F)
198032.6 C (90.7 F)
198134.0 C (93.2 F)
198232.7 C (90.9 F)
198335.7 C (96.3 F)

Coldest night (TNn)

Coldest night (TNn) at St Catharines A by year The coldest night of the year at St Catharines A, 1971 to 1983. The record is -25.7 C (-14.3 F) in 1979, marked on the chart; the median year is -19.4 C (-2.9 F). -30-25-20-1519751980Record: -25.7 C (-14.3 F) in 1979
The coldest night of the year at St Catharines A, 1971 to 1983. The record is -25.7 C (-14.3 F) in 1979, marked on the chart; the median year is -19.4 C (-2.9 F).
Coldest night (TNn) at St Catharines A by year
YearColdest night (TNn)
1971-15.0 C (5.0 F)
1972-19.4 C (-2.9 F)
1973-17.2 C (1.0 F)
1974-19.4 C (-2.9 F)
1975-17.8 C (0.0 F)
1976-22.2 C (-8.0 F)
1977-18.8 C (-1.8 F)
1978-17.9 C (-0.2 F)
1979-25.7 C (-14.3 F)
1980-22.5 C (-8.5 F)
1981-23.0 C (-9.4 F)
1982-23.6 C (-10.5 F)
1983-17.4 C (0.7 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at St Catharines A by year The wettest day of the year at St Catharines A, 1971 to 1983. The record is 67.0 mm (2.6 in) in 1979, marked on the chart; the median year is 46.2 mm (1.8 in). 20304050607019751980Record: 67.0 mm (2.6 in) in 1979
The wettest day of the year at St Catharines A, 1971 to 1983. The record is 67.0 mm (2.6 in) in 1979, marked on the chart; the median year is 46.2 mm (1.8 in).
Wettest day (Rx1day) at St Catharines A by year
YearWettest day (Rx1day)
197166.0 mm (2.6 in)
197250.3 mm (2.0 in)
197348.0 mm (1.9 in)
197428.2 mm (1.1 in)
197543.4 mm (1.7 in)
197649.3 mm (1.9 in)
197746.2 mm (1.8 in)
197846.0 mm (1.8 in)
197967.0 mm (2.6 in)
198037.8 mm (1.5 in)
198165.2 mm (2.6 in)
198238.0 mm (1.5 in)
198333.0 mm (1.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at St Catharines A by year The wettest five days of the year at St Catharines A, 1971 to 1983. The record is 92.2 mm (3.6 in) in 1976, marked on the chart; the median year is 71.4 mm (2.8 in). 40608010019751980Record: 92.2 mm (3.6 in) in 1976
The wettest five days of the year at St Catharines A, 1971 to 1983. The record is 92.2 mm (3.6 in) in 1976, marked on the chart; the median year is 71.4 mm (2.8 in).
Wettest five days (Rx5day) at St Catharines A by year
YearWettest five days (Rx5day)
197175.4 mm (3.0 in)
197256.6 mm (2.2 in)
197371.4 mm (2.8 in)
197450.3 mm (2.0 in)
197554.6 mm (2.1 in)
197692.2 mm (3.6 in)
197790.2 mm (3.6 in)
197863.6 mm (2.5 in)
197974.6 mm (2.9 in)
198050.0 mm (2.0 in)
198187.4 mm (3.4 in)
198272.4 mm (2.9 in)
198356.3 mm (2.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at St Catharines A by year The longest dry spell of the year at St Catharines A, 1971 to 1983. The record is 22 days in 1975, marked on the chart; the median year is 16 days. 1015202519751980Record: 22 days in 1975
The longest dry spell of the year at St Catharines A, 1971 to 1983. The record is 22 days in 1975, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at St Catharines A by year
YearLongest dry spell (CDD)
197113 days
197212 days
197318 days
197417 days
197522 days
197617 days
197714 days
197817 days
197911 days
198015 days
198116 days
198216 days
198312 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Download the Data

  • Data for St Catharines A standing records by year: CSV or JSON. Field meanings are on the data page.
  • 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).