Romeoville Weather Forecast
- 70
- 87
Mostly Sunny
- 76
- 92
Mostly Sunny
- 73
- 96
Thunderstorms Likely
- 69
- 85
Thunderstorms Likely
- 71
- 87
Chance Thunderstorms
- 71
- 92
Mostly Sunny
- 72
- 93
Slight Chance Thunderstorms
Today 22 Jul Northern Will
Partly cloudy late in the Morning, then becoming mostly sunny. Highs in the upper 80s. Southeast Winds 5 to 10 Mph.
Tonight 22 Jul Northern Will
Mostly clear in the Evening, then becoming partly cloudy. Lows around 70. Southeast Winds 5 to 10 Mph.
Romeoville Temperature Statistics
July Temperature
Lewis University Airport (3.1 miles)
Lowest 18 July, 2025
58.6 °FAverage July
76.3 °FHighest 5 July, 2025
93.7 °F
Climate (2020–Present)
Lewis University Airport (3.1 miles)
Average Low 2020–2025
43.4 °FAverage 2020–2025
52.4 °FAverage High 2020–2025
61.7 °F