As of 03:16 CDT

Oak Lawn, IL weather in September

65°

Oak Lawn, Sunday, 9 August, 03:16

Clear. Feels like 66°. High 84°, low 64°.

Pressure30.00 inHg

Wind3.7 mph SW

Humidity92%

Visibility6.2 mi

Dew point62°

See detailed hourly forecast

In September, Oak Lawn, IL averages a high of 73.9° and a low of 59.1°. About 3.3 inches of precipitation fall over the month (9 wet days). The record high is 95° (2011) and the record low 36° (1974). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	78.8°	64°	30%	95° (2011)	52.9° (1967)
2	79.2°	64.4°	27%	92.3° (2008)	50.4° (1965)
3	79°	64°	27%	93° (2023)	51.4° (1974)
4	77.9°	63.1°	33%	91.2° (2023)	49.6° (2025)
5	77.9°	62.6°	27%	90.1° (2023)	52.2° (1974)
6	77.5°	62.8°	38%	91.8° (1990)	48.7° (2025)
7	77.7°	62.2°	30%	92.3° (1960)	47.7° (2025)
8	76.1°	61.9°	35%	91° (1978)	46.9° (1986)
9	75.7°	61.5°	32%	93.2° (2013)	50.4° (1986)
10	76.6°	61°	30%	93.9° (2013)	49.6° (2017)
11	76.3°	60.8°	30%	90.9° (2005)	45.5° (1993)
12	76.1°	60.6°	32%	90.1° (2005)	46.9° (2014)
13	75.7°	60.6°	40%	92.1° (2005)	43.5° (2014)
14	74.5°	59.7°	32%	87.6° (1991)	43.9° (1975)
15	73.2°	59°	23%	88.2° (1991)	45.9° (2007)
16	72.7°	58.8°	25%	87.4° (2024)	46.6° (1966)
17	73.9°	59.2°	38%	87.4° (1988)	46.8° (2014)
18	74.1°	58.8°	33%	86.7° (2025)	47.5° (1973)
19	74.1°	59.5°	35%	89.4° (2025)	42.1° (2020)
20	73.8°	58.6°	47%	89.2° (2017)	43.9° (1991)
21	72.5°	57.9°	33%	90.7° (2017)	44.1° (1962)
22	70.5°	57°	45%	89.8° (2017)	39.4° (1995)
23	69.3°	54.3°	32%	90.7° (2017)	36° (1974)
24	69.8°	55°	23%	90° (2007)	41.4° (1976)
25	70.2°	55.2°	42%	88.9° (2017)	43.7° (1989)
26	70.2°	55.2°	28%	87.8° (2017)	44.2° (1984)
27	69.4°	55.2°	28%	85.5° (2021)	41.5° (1991)
28	67.8°	54.5°	25%	83.8° (1971)	42.8° (1975)
29	68.4°	53.1°	30%	87.6° (2025)	37.6° (1967)
30	69.4°	53.6°	17%	85.5° (1971)	36.1° (1993)