As of 16:57 CDT

Harwood Heights, IL weather in September

76°

Harwood Heights, Sunday, 9 August, 16:57

Overcast. Feels like 77°. High 79°, low 63°.

Pressure29.88 inHg

Wind7.5 mph SW

Humidity82%

Visibility6.2 mi

Dew point70°

See detailed hourly forecast

In September, Harwood Heights, IL averages a high of 73.1° and a low of 59.9°. About 3.2 inches of precipitation fall over the month (9 wet days). The record high is 94.3° (2023) and the record low 37.8° (1995). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	77.9°	64.9°	32%	91.9° (2011)	54.5° (1987)
2	78.4°	64.9°	23%	90.5° (2011)	51.4° (2017)
3	78.3°	64.9°	30%	94.3° (2023)	52.3° (1974)
4	77°	64°	30%	92.8° (2023)	49.8° (2025)
5	77°	63.5°	22%	91° (2023)	53.6° (2010)
6	76.8°	63.5°	35%	91.4° (1990)	49.6° (2025)
7	77°	63.1°	32%	91.4° (1960)	48.2° (2025)
8	75.2°	62.8°	33%	91° (1978)	48° (2024)
9	75°	62.4°	32%	91.2° (1983)	52° (1986)
10	75.7°	61.5°	27%	93.6° (2013)	50.9° (2017)
11	75.4°	61.7°	33%	89.1° (2005)	48.6° (1993)
12	75.4°	61.5°	35%	89.8° (2021)	47.3° (2014)
13	74.8°	61.5°	38%	91° (2005)	44.2° (2014)
14	73.6°	60.4°	32%	86.7° (2021)	46° (1975)
15	72.3°	59.9°	22%	86.9° (2024)	46.8° (2007)
16	72°	59.4°	28%	87.1° (2017)	49.1° (1966)
17	73°	59.9°	37%	87.6° (2018)	49.3° (2014)
18	73°	59.7°	35%	85.3° (1988)	48.9° (1973)
19	73.2°	60.4°	38%	89.8° (2024)	45.3° (2020)
20	73°	59.2°	43%	90.3° (2024)	45.1° (1991)
21	71.6°	58.6°	30%	91.2° (2017)	45.1° (1983)
22	69.8°	57.6°	45%	91.4° (2017)	40.1° (1995)
23	68.2°	55.4°	30%	90.5° (2017)	37.8° (1995)
24	68.7°	55.9°	27%	88.7° (2017)	43.9° (1990)
25	69.4°	56.1°	40%	88.5° (2017)	44.8° (2001)
26	69.4°	56.1°	32%	88.5° (2017)	44.2° (1984)
27	68.5°	55.8°	27%	86° (2021)	43.3° (1991)
28	66.7°	55.2°	28%	82.8° (1971)	43.9° (1961)
29	67.3°	54°	28%	83.8° (2025)	39.2° (1967)
30	68.2°	54.3°	18%	85.5° (2019)	39.4° (1993)