St Catharines Power Glen Weather Records (CA006137306)

Record envelope, standing records and threshold days for St Catharines Power Glen (CA006137306), Ontario, Canada, with 42 years of record.

Key Facts for St Catharines Power Glen

St Catharines Power Glen (CA006137306) is a weather station in Ontario, Canada at 43.12 latitude and -79.25 longitude, 122 m (400 ft) above sea level.
The station reports from 1965 to 2006, 42 years of record.
1,464 records set at St Catharines Power Glen 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, 43.12 latitude, -79.25 longitude.
Elevation: 122 m (400 ft).
Period of record: 1965 to 2006, 42 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at St Catharines Power Glen. 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 Power Glen, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.7 C (62.1 F)	-26.0 C (-14.8 F)	n/a	n/a
Feb	14.4 C (57.9 F)	-28.0 C (-18.4 F)	n/a	n/a
Mar	23.9 C (75.0 F)	-20.0 C (-4.0 F)	n/a	n/a
Apr	27.8 C (82.0 F)	-9.5 C (14.9 F)	n/a	n/a
May	33.0 C (91.4 F)	-3.9 C (25.0 F)	n/a	n/a
Jun	32.5 C (90.5 F)	0.0 C (32.0 F)	n/a	n/a
Jul	35.5 C (95.9 F)	5.6 C (42.1 F)	n/a	n/a
Aug	35.6 C (96.1 F)	2.2 C (36.0 F)	n/a	n/a
Sep	32.8 C (91.0 F)	-1.1 C (30.0 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-7.8 C (18.0 F)	n/a	n/a
Nov	22.5 C (72.5 F)	-12.2 C (10.0 F)	n/a	n/a
Dec	21.5 C (70.7 F)	-26.0 C (-14.8 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at St Catharines Power Glen still stand. 1965 holds the most, with 110.

Standing records at St Catharines Power Glen by the year they were set
Year set	Standing records
1965	110
1966	95
1967	85
1968	75
1969	59
1970	69
1971	79
1972	68
1973	78
1974	75
1975	83
1976	106
1977	70
1978	68
1979	53
1980	69
1981	64
1982	76
1983	82

Wettest Day of Each Month

Jun: 76.2 mm (3.0 in)

The wettest day on record for each calendar month at St Catharines Power Glen. The most was 76.2 mm (3.0 in) on 25 June 1968.

Record daily precipitation for each month at St Catharines Power Glen
Month	Record daily precipitation (mm)	Date
Jan	38.1 mm (1.5 in)	22 January 1966
Feb	25.4 mm (1.0 in)	13 February 1971
Mar	38.1 mm (1.5 in)	1 March 1972
Apr	36.8 mm (1.4 in)	22 April 1977
May	57.2 mm (2.3 in)	6 May 1976
Jun	76.2 mm (3.0 in)	25 June 1968
Jul	38.6 mm (1.5 in)	31 July 1976
Aug	51.1 mm (2.0 in)	26 August 1965
Sep	66.4 mm (2.6 in)	13 September 1977
Oct	33.2 mm (1.3 in)	25 October 1980
Nov	41.9 mm (1.6 in)	28 November 1968
Dec	30.7 mm (1.2 in)	10 December 1969

Period of Record Coverage

1965 to 1983

19 years of record at St Catharines Power Glen, 1965 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1979.

Days with data per year at St Catharines Power Glen
Year	Days with data	Share of year	Complete
1965	352	96%	Yes
1966	349	96%	Yes
1967	343	94%	Yes
1968	363	99%	Yes
1969	358	98%	Yes
1970	359	98%	Yes
1971	359	98%	Yes
1972	365	100%	Yes
1973	359	98%	Yes
1974	356	98%	Yes
1975	361	99%	Yes
1976	364	99%	Yes
1977	355	97%	Yes
1978	346	95%	Yes
1979	201	55%	No
1980	345	94%	Yes
1981	358	98%	Yes
1982	344	94%	Yes
1983	355	97%	Yes

Latest Records

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

Climate Trend

16 complete years, 1965 to 1983

One stripe for each of 16 complete years at St Catharines Power Glen, 1965 to 1983. Blue stripes are years cooler than the station's own mean of 8.3 C (47.0 F); red stripes are warmer. The coolest year was 1972, at 7.6 C (45.7 F), and the warmest was 1973, at 9.4 C (48.8 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at St Catharines Power Glen as warming stripes, 1965 to 1983
Year	Annual mean temperature	Difference from the station mean
1965	7.8 C	-0.56 C
1967	8.2 C	-0.14 C
1968	8.4 C	+0.10 C
1969	8.3 C	-0.05 C
1970	8.4 C	+0.04 C
1971	8.6 C	+0.27 C
1972	7.6 C	-0.72 C
1973	9.4 C	+1.02 C
1974	8.4 C	+0.05 C
1975	9.1 C	+0.73 C
1976	7.8 C	-0.49 C
1977	8.4 C	+0.07 C
1978	7.7 C	-0.68 C
1980	8.0 C	-0.38 C
1981	8.5 C	+0.13 C
1983	8.9 C	+0.61 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

1965 to 1983

Yearly extremes at St Catharines Power Glen: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.6 C (96.1 F)	1973	33.0 C (91.4 F)	19
Coldest night (TNn)	-28.0 C (-18.4 F)	1979	-21.7 C (-7.1 F)	19
Wettest day (Rx1day)	76.2 mm (3.0 in)	1968	37.8 mm (1.5 in)	19
Wettest five days (Rx5day)	109.8 mm (4.3 in)	1977	65.6 mm (2.6 in)	19
Longest dry spell (CDD)	27 days	1978	17 days	19

Hottest day (TXx)

The hottest day of the year at St Catharines Power Glen, 1965 to 1983. The record is 35.6 C (96.1 F) in 1973, marked on the chart; the median year is 33.0 C (91.4 F).

Hottest day (TXx) at St Catharines Power Glen by year
Year	Hottest day (TXx)
1965	31.7 C (89.1 F)
1966	35.0 C (95.0 F)
1967	30.6 C (87.1 F)
1968	32.8 C (91.0 F)
1969	32.8 C (91.0 F)
1970	31.7 C (89.1 F)
1971	32.2 C (90.0 F)
1972	33.3 C (91.9 F)
1973	35.6 C (96.1 F)
1974	33.3 C (91.9 F)
1975	34.4 C (93.9 F)
1976	31.7 C (89.1 F)
1977	35.5 C (95.9 F)
1978	34.0 C (93.2 F)
1979	33.0 C (91.4 F)
1980	32.5 C (90.5 F)
1981	33.0 C (91.4 F)
1982	32.5 C (90.5 F)
1983	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at St Catharines Power Glen, 1965 to 1983. The record is -28.0 C (-18.4 F) in 1979, marked on the chart; the median year is -21.7 C (-7.1 F).

Coldest night (TNn) at St Catharines Power Glen by year
Year	Coldest night (TNn)
1965	-23.3 C (-9.9 F)
1966	-22.8 C (-9.0 F)
1967	-21.1 C (-6.0 F)
1968	-22.2 C (-8.0 F)
1969	-20.0 C (-4.0 F)
1970	-22.2 C (-8.0 F)
1971	-20.0 C (-4.0 F)
1972	-21.7 C (-7.1 F)
1973	-18.9 C (-2.0 F)
1974	-21.1 C (-6.0 F)
1975	-16.1 C (3.0 F)
1976	-25.0 C (-13.0 F)
1977	-21.1 C (-6.0 F)
1978	-20.0 C (-4.0 F)
1979	-28.0 C (-18.4 F)
1980	-26.0 C (-14.8 F)
1981	-26.0 C (-14.8 F)
1982	-24.0 C (-11.2 F)
1983	-19.5 C (-3.1 F)

Wettest day (Rx1day)

The wettest day of the year at St Catharines Power Glen, 1965 to 1983. The record is 76.2 mm (3.0 in) in 1968, marked on the chart; the median year is 37.8 mm (1.5 in).

Wettest day (Rx1day) at St Catharines Power Glen by year
Year	Wettest day (Rx1day)
1965	51.1 mm (2.0 in)
1966	39.1 mm (1.5 in)
1967	34.8 mm (1.4 in)
1968	76.2 mm (3.0 in)
1969	37.8 mm (1.5 in)
1970	29.0 mm (1.1 in)
1971	34.5 mm (1.4 in)
1972	40.9 mm (1.6 in)
1973	34.5 mm (1.4 in)
1974	30.5 mm (1.2 in)
1975	34.5 mm (1.4 in)
1976	57.2 mm (2.3 in)
1977	66.4 mm (2.6 in)
1978	42.0 mm (1.7 in)
1979	28.2 mm (1.1 in)
1980	33.2 mm (1.3 in)
1981	57.0 mm (2.2 in)
1982	35.0 mm (1.4 in)
1983	49.8 mm (2.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at St Catharines Power Glen, 1965 to 1983. The record is 109.8 mm (4.3 in) in 1977, marked on the chart; the median year is 65.6 mm (2.6 in).

Wettest five days (Rx5day) at St Catharines Power Glen by year
Year	Wettest five days (Rx5day)
1965	60.3 mm (2.4 in)
1966	48.3 mm (1.9 in)
1967	70.1 mm (2.8 in)
1968	82.1 mm (3.2 in)
1969	71.6 mm (2.8 in)
1970	49.6 mm (2.0 in)
1971	56.1 mm (2.2 in)
1972	65.6 mm (2.6 in)
1973	64.9 mm (2.6 in)
1974	51.5 mm (2.0 in)
1975	51.2 mm (2.0 in)
1976	80.8 mm (3.2 in)
1977	109.8 mm (4.3 in)
1978	68.8 mm (2.7 in)
1979	38.0 mm (1.5 in)
1980	52.2 mm (2.1 in)
1981	92.8 mm (3.7 in)
1982	67.0 mm (2.6 in)
1983	87.7 mm (3.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at St Catharines Power Glen, 1965 to 1983. The record is 27 days in 1978, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at St Catharines Power Glen by year
Year	Longest dry spell (CDD)
1965	13 days
1966	18 days
1967	21 days
1968	13 days
1969	20 days
1970	14 days
1971	12 days
1972	14 days
1973	17 days
1974	17 days
1975	22 days
1976	20 days
1977	22 days
1978	27 days
1979	9 days
1980	15 days
1981	14 days
1982	16 days
1983	20 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 Power Glen standing records by year: CSV or JSON. Field meanings are on the data page.
Data for St Catharines Power Glen 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 2026-10-14. Last revised 14 October 2026 (2026-10-14).