St Catharines Power Glen Threshold Days by Year (CA006137306)

13 fixed thresholds counted per year at St Catharines Power Glen (CA006137306): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for St Catharines Power Glen Thresholds

St Catharines Power Glen: days with a maximum temperature at or above 30 C (86 F) in 18 years, most in 1983 with 26.
St Catharines Power Glen: days with a maximum temperature at or below 0 C (32 F) in 18 years, most in 1970 with 70.
St Catharines Power Glen: nights with a minimum temperature at or below 0 C (32 F) in 18 years, most in 1972 with 154.
St Catharines Power Glen: nights with a minimum temperature at or below -10 C (14 F) in 18 years, most in 1978 with 51.
13 fixed thresholds have at least one qualifying day at St Catharines Power Glen.

Days at or above 30 C (86 F)

18 years with a qualifying day

Days per year at St Catharines Power Glen with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 1983.

Days at or above 30 C (86 F) per year at St Catharines Power Glen
Year	Days	Decade average
1965	6	13.6
1966	21	13.6
1967	11	13.6
1968	15	13.6
1969	15	13.6
1970	14	14.8
1971	13	14.8
1972	8	14.8
1973	25	14.8
1974	13	14.8
1975	18	14.8
1976	7	14.8
1977	12	14.8
1978	23	14.8
1980	10	12.5
1981	5	12.5
1982	9	12.5
1983	26	12.5

For each year, a bar from the first to the last day at St Catharines Power Glen meeting 30 C (86 F).

First to last qualifying date each year at St Catharines Power Glen
Year	First date	Last date
1965	1965-06-20	1965-09-22
1966	1966-06-23	1966-09-02
1967	1967-06-12	1967-08-17
1968	1968-06-07	1968-08-24
1969	1969-06-26	1969-09-01
1970	1970-06-10	1970-09-24
1971	1971-06-29	1971-09-08
1972	1972-07-11	1972-08-24
1973	1973-06-09	1973-09-05
1974	1974-06-09	1974-08-21
1975	1975-05-22	1975-08-02
1976	1976-06-07	1976-06-15
1977	1977-05-17	1977-09-01
1978	1978-05-26	1978-09-06
1980	1980-05-23	1980-08-25
1981	1981-06-15	1981-07-13
1982	1982-07-06	1982-09-13
1983	1983-06-12	1983-09-10

Every Fixed Threshold

Fixed thresholds at St Catharines Power Glen
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	18	26	1983	26
35 C (95 F): Days	4	2	1966	2
90 F (32.2 C): Days	14	10	1973	3
0 C (32 F): Ice days (max	18	70	1970	48
0 C (32 F): Frost days (min	18	154	1972	124
-10 C (14 F): Days with min	18	51	1978	24
-20 C (-4 F): Days with min	15	7	1977	3
20 C (68 F): Tropical nights (min	18	24	1973	21
10 mm (0.39 in): Days with 10 mm or more rain	17	35	1981	30
25 mm (0.98 in): Days with 25 mm or more rain	17	7	1969	5
50 mm (1.97 in): Days with 50 mm or more rain	4	1	1968	1
10 cm (3.9 in): Days with 10 cm or more snowfall	15	6	1971	2
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.

Download the Data

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

St Catharines Power Glen Threshold Days by Year (CA006137306)

Key Facts for St Catharines Power Glen Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related