As of 01:35 CDT

Joliet, IL weather in August

65°

Joliet, Sunday, 9 August, 01:35

Clear. Feels like 65°. High 86°, low 64°.

Pressure30.00 inHg

Wind3.8 mph SW

Humidity95%

Visibility6.2 mi

Dew point63°

See detailed hourly forecast

In August, Joliet, IL averages a high of 81.1° and a low of 64.9°. About 3.5 inches of precipitation fall over the month (10 wet days). The record high is 97.9° (2023) and the record low 45.7° (1986). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	82.4°	65.3°	25%	95.2° (1988)	52.9° (1990)
2	82.6°	66°	35%	95° (1991)	55° (1968)
3	82.6°	65.5°	33%	94.3° (1988)	51.1° (1976)
4	81.7°	65.3°	38%	95.4° (1988)	53.1° (1966)
5	80.8°	65.5°	37%	91.4° (2024)	52.9° (1993)
6	81.1°	65.1°	28%	92.8° (1968)	50.2° (1994)
7	81.5°	65.3°	33%	93.4° (2001)	52.9° (1994)
8	82.2°	66°	33%	95° (1983)	52.7° (1976)
9	81.7°	65.8°	35%	94.1° (2001)	51.8° (1972)
10	80.8°	65.8°	40%	92.8° (1983)	50° (1972)
11	79.9°	64.6°	32%	92.3° (2016)	52.2° (1965)
12	80.1°	63.3°	27%	93.4° (1995)	49.6° (2004)
13	80.8°	64.6°	23%	92.3° (1995)	52.7° (2004)
14	80.2°	64.6°	30%	92.7° (1988)	50° (1964)
15	81.1°	64.8°	30%	93.7° (1988)	50° (1964)
16	81.7°	64.9°	33%	97.7° (1988)	51.4° (1979)
17	81.5°	65.1°	38%	97.7° (1988)	51.8° (1976)
18	81°	64.9°	37%	94.3° (1988)	53.2° (1963)
19	80.8°	65.1°	40%	97° (1983)	54.3° (1992)
20	80.2°	65.1°	37%	91.9° (1983)	52.9° (1992)
21	81°	64°	27%	95.7° (1983)	52° (1992)
22	80.8°	64.6°	32%	91.6° (1968)	50.5° (2024)
23	80.4°	64.6°	37%	97° (2023)	54.1° (1997)
24	81.1°	64.4°	27%	97.9° (2023)	52.9° (1967)
25	81.3°	64.4°	27%	92.5° (1991)	52.2° (2017)
26	81.5°	65.7°	35%	95° (2024)	50.9° (1964)
27	81.5°	66°	27%	95.7° (2024)	52.9° (2025)
28	80.8°	65.3°	25%	93° (1984)	48.2° (1986)
29	81°	64.2°	33%	93.9° (1984)	45.7° (1986)
30	79.9°	63.9°	22%	93° (2013)	49.8° (1986)
31	79.7°	63.3°	22%	89.8° (2011)	51.4° (2009)