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Fort St. John September Weather

Averages and records for weather in Fort St. John, British Columbia in the month of September.

Typical Fort St. John September Weather 1991–2020
Average daily high	15.7 °C
Average daily low	5.1 °C
Average monthly precipitation	4.4 cm
Average monthly snow	4.7 cm
Daily chance of precipitation	32.8%
Daily chance of snow	3.0%

Fort St. John September Weather Records 1910–2024
Highest temperature	32.2 °C	September 3, 1938
Lowest temperature	-12.8 °C	September 30, 1974
Highest daily low	16.5 °C	September 22, 1994
Lowest daily high	-6.1 °C	September 29, 1974
Hottest average high temperature	22.6 °C	1938
Coldest average high temperature	9.9 °C	1972
Most daily precipitation	4.3 cm	September 2, 2015
Most monthly precipitation	14.8 cm	1941
Most daily snow	21.8 cm	September 18, 2004
Most monthly snow	56.6 cm	2004

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	17.9	7.1	28.9	-6.7
September 2	17.6	6.9	31.1	-5.0
September 3	17.5	6.7	32.2	-1.7
September 4	17.3	6.6	29.4	-3.3
September 5	17.1	6.4	27.8	-6.1
September 6	17.0	6.2	29.1	-8.9
September 7	16.9	6.1	28.9	-2.8
September 8	16.8	5.9	27.9	-3.9
September 9	16.6	5.8	30.0	-1.7
September 10	16.5	5.7	28.9	-3.9
September 11	16.3	5.6	26.7	-8.3
September 12	16.2	5.5	29.8	-3.9
September 13	16.1	5.4	25.6	-5.0
September 14	16.0	5.3	26.7	-5.8
September 15	15.8	5.2	29.4	-5.0
September 16	15.6	5.0	29.4	-5.0
September 17	15.4	4.8	27.8	-7.8
September 18	15.1	4.6	26.7	-5.6
September 19	14.9	4.4	25.1	-5.0
September 20	14.7	4.2	26.0	-5.6
September 21	14.5	4.1	27.0	-5.6
September 22	14.3	3.9	27.2	-6.7
September 23	14.1	3.7	26.4	-6.0
September 24	13.9	3.6	26.7	-8.3
September 25	13.6	3.4	27.2	-6.7
September 26	13.4	3.2	23.9	-10.0
September 27	13.1	3.0	26.1	-8.3
September 28	12.9	2.8	25.6	-7.2
September 29	12.6	2.6	24.4	-11.1
September 30	12.4	2.5	25.6	-12.8

Weather Station Details

Years	Station	Coordinates
2012–2024	FORT ST. JOHN A	location
1942–2012	FORT ST JOHN A	location
1910–1942	FORT ST JOHN	location