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St. Catharines July Weather

Averages and records for weather in St. Catharines, Ontario in the month of July.

Typical St. Catharines July Weather 1991–2020
Average daily high	26.2 °C
Average daily low	18.4 °C
Average monthly precipitation	6.6 cm
Daily chance of precipitation	30.3%

St. Catharines July Weather Records 1882–2024
Highest temperature	40.0 °C	July 10, 1936
Lowest temperature	4.0 °C	July 5, 1982
Highest daily low	26.5 °C	July 6, 1993
Lowest daily high	15.0 °C	July 1, 1902
Hottest average high temperature	31.9 °C	1955
Coldest average high temperature	23.2 °C	2009
Most daily precipitation	6.1 cm	July 24, 1920
Most monthly precipitation	16.6 cm	1992

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
July 1	25.2	17.2	35.0	6.7
July 2	25.3	17.3	35.6	7.8
July 3	25.5	17.5	37.2	7.8
July 4	25.6	17.6	35.6	7.8
July 5	25.7	17.7	35.6	4.0
July 6	25.8	17.8	36.0	8.3
July 7	26.0	17.9	37.5	8.9
July 8	26.0	18.1	37.8	8.9
July 9	26.1	18.1	39.4	8.9
July 10	26.1	18.2	40.0	7.0
July 11	26.1	18.2	37.8	6.7
July 12	26.1	18.3	35.6	7.2
July 13	26.1	18.3	38.3	8.3
July 14	26.1	18.4	33.9	7.2
July 15	26.1	18.4	34.0	6.1
July 16	26.1	18.5	36.0	7.8
July 17	26.2	18.5	33.8	8.9
July 18	26.3	18.6	34.4	10.0
July 19	26.3	18.6	33.9	8.9
July 20	26.3	18.7	35.5	8.9
July 21	26.2	18.7	36.1	8.9
July 22	26.2	18.7	35.0	9.0
July 23	26.2	18.7	37.2	11.1
July 24	26.2	18.7	33.3	11.0
July 25	26.2	18.7	34.4	10.0
July 26	26.2	18.7	34.4	8.9
July 27	26.2	18.7	36.1	9.4
July 28	26.2	18.7	35.0	10.0
July 29	26.2	18.7	35.0	9.4
July 30	26.2	18.8	36.7	6.7
July 31	26.1	18.7	35.6	9.4

Weather Station Details

Years	Station	Coordinates
1995–2024	Port Weller (AUT)	location
1882–1994	St Catherines	location