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Belleville September Weather

Averages and records for weather in Belleville, Illinois in the month of September.

Typical Belleville September Weather 1991–2020
Average daily high	83.0 °F
Average daily low	57.3 °F
Average monthly precipitation	3.4 inches
Average monthly snow	none
Daily chance of precipitation	21.9%
Daily chance of snow	0%

Belleville September Weather Records 1948–2024
Highest temperature	103 °F	September 5, 1954
Lowest temperature	26 °F	September 23, 1995
Highest daily low	76 °F	September 4, 2019
Lowest daily high	57 °F	September 15, 1993
Hottest average high temperature	88.1 °F	2019
Coldest average high temperature	74.8 °F	1949
Most daily precipitation	4.2 inches	September 8, 2018
Most monthly precipitation	9.5 inches	2005
Most daily snow	none	-
Most monthly snow	none	-

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

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	87.0	62.5	100	44
September 2	86.7	62.3	100	42
September 3	86.4	62.0	98	44
September 4	86.2	61.7	102	42
September 5	86.1	61.4	103	42
September 6	85.9	61.2	102	45
September 7	85.6	60.9	99	35
September 8	85.3	60.6	98	40
September 9	85.0	60.2	98	41
September 10	84.6	59.8	99	41
September 11	84.3	59.4	99	41
September 12	84.0	59.0	98	39
September 13	83.7	58.5	97	42
September 14	83.5	58.1	101	40
September 15	83.2	57.6	100	38
September 16	82.9	57.0	97	37
September 17	82.7	56.6	95	40
September 18	82.4	56.2	97	41
September 19	82.1	55.9	97	36
September 20	81.9	55.6	96	32
September 21	81.6	55.2	97	31
September 22	81.2	54.8	97	35
September 23	80.9	54.3	94	26
September 24	80.6	53.9	94	28
September 25	80.3	53.6	94	32
September 26	80.0	53.3	95	36
September 27	79.6	52.9	93	34
September 28	79.2	52.6	98	30
September 29	78.8	52.2	101	35
September 30	78.5	51.9	94	28

Weather Station Details

Years	Station	Coordinates
1948–2024	Belleville SIU Research	location