Portage Park Weather Forecast
- 73
- 80
Chance Thunderstorms
- 68
- 84
Chance Thunderstorms
- 66
- 79
Partly Sunny
- 68
- 82
Chance Thunderstorms
- 63
- 78
Slight Chance Thunderstorms
- 61
- 73
Slight Chance Thunderstorms
Today 15 Aug Central Cook
Cloudy. Showers likely and a slight chance of Thunderstorms in the Morning, then a chance of Showers and a slight chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall early in the morning. Highs in the lower 80s. Southeast Winds 5 to 10 Mph, becoming southwest in the afternoon. Chance of precipitation 60 percent.
Tonight 15 Aug Central Cook
Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms early in the Evening, then a slight chance of Showers late in the evening. A chance of Showers and Thunderstorms after midnight. Humid with Lows in the lower 70s. Southwest Winds 5 to 10 Mph. Chance of precipitation 50 percent.
Portage Park Temperature Statistics
August Temperature
Chicago, Chicago-O'Hare International Airport (7.5 miles)
Lowest 3 August, 2026
62.7 °FAverage August
75.7 °FHighest 7 August, 2026
87.7 °F
Climate (2021–2026)
Chicago, Chicago-O'Hare International Airport (7.5 miles)
Average Low 2021–2026
45.3 °FAverage 2021–2026
53.5 °FAverage High 2021–2026
61.9 °F