As of 06:44 CDT

Summit, IL weather in October

67°

Summit, Sunday, 9 August, 06:44

Clear. Feels like 68°. High 84°, low 64°.

Pressure30.00 inHg

Wind3.2 mph S

Humidity92%

Visibility6.2 mi

Dew point65°

See detailed hourly forecast

In October, Summit, IL averages a high of 61.6° and a low of 47.8°. About 3.3 inches of precipitation fall over the month (10 wet days). The record high is 89.2° (2025) and the record low 25.7° (1962). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	69.3°	53.8°	20%	86° (2019)	40.1° (2003)
2	68.7°	53.8°	32%	83.7° (1971)	36.5° (2003)
3	67.6°	53.6°	42%	89.2° (2025)	34.3° (1974)
4	66.6°	52.5°	33%	85.6° (2005)	39° (1989)
5	66.6°	51.4°	27%	84.7° (2007)	34.3° (2020)
6	66°	51.6°	33%	86.4° (2007)	38.5° (1966)
7	64.6°	50.2°	28%	86.7° (2007)	33.6° (2001)
8	65.7°	50.7°	33%	86.2° (2007)	33.8° (2022)
9	64.8°	50.4°	27%	81.9° (2018)	35.1° (2000)
10	63.7°	49.1°	22%	81.7° (2010)	35.4° (1964)
11	64.4°	49.1°	25%	82.6° (2024)	33.3° (2009)
12	63.7°	49.6°	35%	80.1° (1995)	33.3° (2006)
13	63°	48.4°	35%	83.1° (1975)	30.7° (2018)
14	62.6°	48.7°	40%	81.3° (1975)	33.8° (1979)
15	61.7°	48.4°	40%	81.1° (1968)	34.7° (2006)
16	59.7°	47.5°	32%	81.1° (1963)	34.7° (2018)
17	60.3°	46.4°	32%	79.9° (2016)	34.3° (2004)
18	59.4°	45.3°	35%	77.2° (2007)	30.6° (2018)
19	58.5°	45.5°	37%	77.9° (1971)	30.7° (1992)
20	59.7°	45°	30%	79.5° (2003)	30° (1972)
21	60.1°	46.2°	28%	79.3° (2024)	26.1° (2018)
22	59.7°	45.5°	28%	79.2° (1963)	29.8° (1976)
23	59.4°	45.7°	33%	79.3° (1963)	31.6° (1976)
24	57.9°	45.9°	38%	78.8° (1963)	26.1° (1981)
25	57.2°	44.4°	32%	75.2° (1963)	31.3° (1962)
26	56.3°	44.2°	32%	79° (1963)	25.7° (1962)
27	56.3°	43.5°	37%	74.5° (2014)	30.2° (1980)
28	55.8°	43.2°	20%	73.6° (1999)	28.4° (1976)
29	55.8°	42.8°	20%	79.3° (2024)	29.1° (1980)
30	57.6°	43.7°	28%	77.7° (2024)	28.4° (1988)
31	56.1°	44.2°	42%	73.8° (1974)	26.4° (2023)