Algonquin Weather Forecast
- 50
- 67
Slight Chance Thunderstorms
- 63
- 79
Chance Thunderstorms
- 43
- 72
Slight Chance Thunderstorms
- 49
- 59
Rain Showers Likely
- 47
- 66
Rain Showers Likely
- 40
- 64
Mostly Sunny
Today 27 Apr McHenry
Partly cloudy in the morning then clearing. Highs in the mid 60s. Southeast Winds 5 to 10 Mph, increasing to south 10 to 15 Mph in the afternoon.
Tonight 27 Apr McHenry
Mostly clear in the Evening, then becoming partly cloudy. A slight chance of Showers and Thunderstorms late. Lows around 50. South Winds 5 to 10 Mph. Chance of precipitation 20 percent.
Algonquin Temperature Statistics
April Temperature
Chicago / West Chicago, Dupage Airport (18.6 miles)
Lowest 8 April, 2025
23.8 °FAverage April
49.1 °FHighest 24 April, 2025
78.1 °F
Climate (2020–Present)
Chicago / West Chicago, Dupage Airport (18.6 miles)
Average Low 2020–2025
42 °FAverage 2020–2025
51.7 °FAverage High 2020–2025
61.1 °F