As of 03:53 CDT

Blue Island, IL weather in September

65°

Blue Island, Sunday, 9 August, 03:53

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

Pressure30.00 inHg

Wind3.2 mph SW

Humidity94%

Visibility6.2 mi

Dew point63°

See detailed hourly forecast

In September, Blue Island, IL averages a high of 73.5° and a low of 59.8°. About 3.2 inches of precipitation fall over the month (9 wet days). The record high is 93.9° (2011) and the record low 38.1° (1995). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	78.4°	64.8°	30%	93.9° (2011)	53.6° (1967)
2	78.6°	65.1°	27%	91.6° (2011)	52° (1965)
3	78.6°	64.8°	23%	92.8° (2023)	52.5° (1974)
4	77.4°	63.9°	33%	90.9° (2023)	50.4° (2025)
5	77.4°	63.3°	27%	90.3° (2023)	53.2° (2010)
6	77°	63.5°	37%	91.2° (1990)	49.3° (2025)
7	77.2°	63.1°	30%	91.8° (1960)	48.2° (2025)
8	75.6°	62.6°	35%	90.5° (1960)	47.5° (2024)
9	75.4°	62.2°	32%	92.1° (2013)	50.9° (2025)
10	76.1°	61.5°	30%	93.2° (2013)	50.4° (2017)
11	75.9°	61.5°	30%	90° (2005)	47.7° (1993)
12	75.7°	61.3°	32%	89.6° (2005)	48° (2014)
13	75.2°	61.3°	40%	91.2° (2005)	44.1° (2014)
14	74.1°	60.3°	32%	87.1° (1991)	45.3° (1975)
15	72.9°	59.7°	23%	87.6° (1991)	47.1° (2007)
16	72.3°	59.4°	23%	86.9° (2024)	47.5° (1966)
17	73.4°	59.7°	38%	87.1° (2018)	48.7° (2014)
18	73.6°	59.5°	33%	85.8° (2025)	48.7° (1973)
19	73.6°	60.1°	33%	89.4° (2025)	43.2° (2020)
20	73.4°	59.2°	47%	89.6° (2022)	45.1° (1991)
21	72.1°	58.5°	32%	91.4° (2017)	45.1° (1983)
22	70.2°	57.6°	43%	91.4° (2017)	40.1° (1995)
23	68.7°	55.2°	32%	91° (2017)	38.1° (1995)
24	69.4°	55.6°	23%	90.5° (2017)	42.8° (1976)
25	69.8°	55.9°	43%	90.1° (2017)	44.8° (2001)
26	69.8°	55.9°	28%	89.8° (2017)	45° (1984)
27	69.1°	55.8°	28%	84.9° (2021)	43° (1991)
28	67.3°	55.2°	23%	83.3° (1986)	43.5° (1984)
29	68°	53.8°	28%	85.3° (2025)	38.3° (1967)
30	68.7°	54.1°	17%	85.6° (2019)	38.3° (1993)