Marietta Weather Forecast
- 72
- 90
Chance Thunderstorms
- 65
- 81
Rain Showers Likely
- 64
- 82
Mostly Sunny
- 67
- 85
Slight Chance Thunderstorms
- 70
- 89
Slight Chance Thunderstorms
- 70
- 90
Chance Thunderstorms
Today 22 Jul Lac Qui Parle
Mostly sunny. Highs in the lower 90s. South Winds 15 to 20 Mph.
Tonight 22 Jul Lac Qui Parle
Partly cloudy with a 50 percent chance of Thunderstorms. Lows in the lower 70s. South Winds 5 to 15 Mph.
Marietta Temperature Statistics
July Temperature
Madison, Madison-Lac Qui Parle County Airport (11.8 miles)
Lowest 17 July, 2025
55.4 °FAverage July
76 °FHighest 3 July, 2025
96.8 °F
Climate (2020–Present)
Madison, Madison-Lac Qui Parle County Airport (11.8 miles)
Average Low 2020–2025
37.7 °FAverage 2020–2025
48.2 °FAverage High 2020–2025
58.6 °F