McCartney Lake Weather Forecast
- 69
- 87
Rain Showers
- 61
- 82
Chance Thunderstorms
- 64
- 83
Mostly Sunny
- 69
- 88
Partly Sunny
- 69
- 89
Chance Thunderstorms
- 60
- 81
Chance Rain Showers
Today 11 Jul Grant
Mostly cloudy with scattered Showers in the Morning, then partly sunny with a chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the upper 80s. South Winds 5 to 10 Mph. Chance of rain 50 percent.
Tonight 11 Jul Grant
A chance of Thunderstorms. Showers likely in the Evening, then a chance of Showers after midnight. Humid with Lows in the upper 60s. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent.
McCartney Lake Temperature Statistics
July Temperature
Dubuque Regional Airport (21.1 miles)
Lowest 2 July, 2025
62.1 °FAverage July
75.8 °FHighest 4 July, 2025
90 °F
Climate (2020–Present)
Dubuque Regional Airport (21.1 miles)
Average Low 2020–2025
40.2 °FAverage 2020–2025
49.6 °FAverage High 2020–2025
58.9 °F