As of 05:00 CDT

La Grange, IL weather in September

64°

La Grange, Sunday, 9 August, 05:00

Clear. Feels like 65°. High 84°, low 64°.

Pressure30.00 inHg

Wind3.2 mph SW

Humidity93%

Visibility6.2 mi

Dew point61°

See detailed hourly forecast

In September, La Grange, IL averages a high of 73.7° and a low of 58.9°. About 3.2 inches of precipitation fall over the month (10 wet days). The record high is 94.3° (2011) and the record low 35.8° (1974). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	78.6°	63.7°	30%	94.3° (2011)	50.5° (2009)
2	79°	64°	27%	92.1° (2008)	47.7° (2017)
3	78.6°	63.9°	28%	92.5° (2023)	50.5° (1974)
4	77.5°	63°	33%	90.7° (2023)	49.3° (2025)
5	77.5°	62.2°	27%	89.2° (2023)	51.3° (1974)
6	77.4°	62.4°	38%	91.8° (1990)	48.9° (2025)
7	77.5°	61.9°	32%	91.9° (1960)	47.7° (2025)
8	75.7°	61.7°	35%	91° (1978)	46.6° (1986)
9	75.6°	61.2°	32%	92.8° (2013)	49.8° (2008)
10	76.3°	60.6°	30%	93.7° (2013)	49.3° (2008)
11	75.9°	60.4°	32%	90.5° (2005)	45.7° (1993)
12	75.9°	60.4°	32%	89.6° (2005)	45.9° (2014)
13	75.4°	60.4°	38%	91.8° (2005)	43° (2014)
14	74.1°	59.5°	32%	86.9° (1991)	43.9° (1975)
15	72.9°	58.8°	23%	87.4° (1991)	45° (2007)
16	72.5°	58.5°	25%	86.9° (2024)	47.1° (1966)
17	73.6°	59°	38%	87.6° (2018)	45.7° (2014)
18	73.9°	58.6°	33%	86.4° (2007)	46.8° (1973)
19	73.8°	59.4°	35%	87.4° (2025)	43.5° (2012)
20	73.4°	58.3°	48%	89.1° (2017)	43.2° (1991)
21	72.1°	57.6°	32%	89.8° (2017)	43.7° (1991)
22	70.2°	56.7°	45%	89.1° (2017)	39° (1995)
23	68.9°	54.1°	32%	90.3° (2017)	35.8° (1974)
24	69.4°	54.9°	23%	89.6° (2007)	42.1° (1976)
25	70°	55°	42%	87.8° (2017)	43° (2001)
26	70°	55°	28%	86.9° (2017)	43.5° (1984)
27	69.3°	54.9°	28%	84.7° (2021)	41.2° (1991)
28	67.6°	54.1°	27%	84° (1971)	42.3° (1975)
29	68.2°	52.9°	30%	87.8° (2025)	37.6° (1967)
30	69.1°	53.2°	17%	85.3° (1971)	36.1° (1993)