As of 10:45 CDT

Rockford, IL weather in September

78°

Rockford, Sunday, 9 August, 10:45

Overcast. Feels like 79°. High 87°, low 63°.

Pressure29.97 inHg

Wind11.6 mph SW

Humidity76%

Visibility0.9 mi

Dew point69°

See detailed hourly forecast

In September, Rockford, IL averages a high of 73° and a low of 56.9°. About 3.1 inches of precipitation fall over the month (9 wet days). The record high is 93.7° (2023) and the record low 32.5° (1993). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	78.3°	61.9°	30%	91.6° (2011)	45.5° (1967)
2	78.6°	61.9°	25%	91.6° (2008)	47.3° (1967)
3	78.3°	62.2°	35%	93.7° (2023)	47.3° (1974)
4	77.2°	60.6°	32%	93° (2023)	44.6° (1974)
5	77°	60.1°	25%	88.7° (2023)	48° (1974)
6	76.8°	60.6°	32%	90.3° (1990)	45.7° (1988)
7	77°	60.1°	28%	90.3° (1960)	45.1° (2025)
8	75.2°	59.7°	32%	90.9° (2002)	43.5° (1986)
9	75°	59°	22%	91° (2013)	46.9° (1986)
10	75.6°	58.6°	22%	91.6° (2013)	47.3° (2008)
11	75.4°	58.5°	27%	90.7° (2021)	42.8° (1993)
12	75.2°	58.6°	32%	89.6° (2021)	42.8° (2014)
13	74.3°	58.6°	33%	89.1° (2005)	41° (2014)
14	73.2°	57°	27%	86.2° (2024)	42.8° (1975)
15	72°	56.8°	22%	86° (2024)	40.1° (2007)
16	72.1°	56.3°	25%	86.4° (2024)	41° (1984)
17	72.9°	56.8°	32%	89.1° (1988)	44.1° (2014)
18	73.6°	56.8°	32%	87.6° (1988)	42.6° (1973)
19	73.2°	57.7°	40%	88.2° (2021)	41.9° (1991)
20	72.3°	56.3°	38%	87.6° (2017)	38.3° (1991)
21	70.7°	55.6°	38%	88.9° (2024)	40.1° (1991)
22	69.1°	54.5°	40%	89.2° (2017)	37° (1995)
23	67.8°	52°	32%	88.3° (2017)	32.7° (1974)
24	68.7°	52.9°	28%	87.1° (2017)	36° (1989)
25	69.3°	53.1°	32%	87.1° (2017)	39.6° (2001)
26	69.4°	53.2°	28%	84.2° (1998)	39.6° (1984)
27	68.5°	52.5°	27%	84.7° (2021)	37° (1991)
28	67.3°	51.8°	27%	82.4° (2025)	36.7° (1964)
29	67.6°	51.3°	30%	86.2° (2025)	36.1° (1984)
30	68.9°	51.6°	15%	85.8° (2021)	32.5° (1993)