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Stephenville September Weather

Averages and records for weather in Stephenville, Newfoundland and Labrador in the month of September.

Typical Stephenville September Weather 1991–2020
Average daily high	17.0 °C
Average daily low	9.3 °C
Average monthly precipitation	13.0 cm
Average monthly snow	0.0 cm
Daily chance of precipitation	51.5%
Daily chance of snow	0.29%

Stephenville September Weather Records 1942–2024
Highest temperature	30.1 °C	September 6, 2023
Lowest temperature	-0.7 °C	September 21, 1986
Highest daily low	19.4 °C	September 26, 1961
Lowest daily high	5.6 °C	September 28, 1947
Hottest average high temperature	19.6 °C	2012
Coldest average high temperature	13.4 °C	1978
Most daily precipitation	8.1 cm	September 21, 1955
Most monthly precipitation	28.0 cm	2005
Most daily snow	2.4 cm	September 27, 1989
Most monthly snow	2.4 cm	1989

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

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
September 1	19.3	11.2	26.6	3.3
September 2	19.2	11.0	27.8	4.4
September 3	19.0	10.9	27.1	3.9
September 4	18.8	10.7	27.1	3.3
September 5	18.6	10.5	24.0	4.4
September 6	18.4	10.4	30.1	3.3
September 7	18.3	10.2	27.9	4.0
September 8	18.2	10.1	27.9	3.0
September 9	18.1	10.0	24.2	3.1
September 10	17.9	9.9	29.1	3.3
September 11	17.7	9.7	25.0	2.2
September 12	17.5	9.5	24.5	1.1
September 13	17.4	9.3	23.9	2.2
September 14	17.3	9.2	26.0	0.6
September 15	17.2	9.1	26.0	2.2
September 16	17.1	9.0	23.9	2.5
September 17	17.0	8.9	24.1	1.7
September 18	16.8	8.8	22.2	1.3
September 19	16.6	8.7	24.4	1.1
September 20	16.5	8.5	22.5	-0.3
September 21	16.3	8.4	24.1	-0.7
September 22	16.1	8.2	24.8	1.1
September 23	15.9	8.0	25.0	1.5
September 24	15.6	7.8	23.9	0.0
September 25	15.4	7.6	22.2	0.8
September 26	15.2	7.5	24.4	0.7
September 27	15.1	7.3	24.2	0.8
September 28	14.8	7.1	24.1	0.6
September 29	14.7	6.9	22.2	0.0
September 30	14.5	6.7	23.5	-0.6

Weather Station Details

Years	Station	Coordinates
1942–2024	Stephenville A	location