Rainbow Lake Weather Forecast
- 72
- 94
Mostly Cloudy
- 72
- 94
Becoming Sunny
- 72
- 93
Mostly Sunny
- 71
- 93
Partly Sunny
- 69
- 92
Chance Rain Showers
- 69
- 91
Slight Chance Thunderstorms
- 70
- 91
Partly Sunny
Today 14 Sep Rockwall
Mostly sunny. Highs in the lower 90s. South Winds 5 to 10 Mph.
Tonight 14 Sep Rockwall
Partly cloudy. Lows in the lower 70s. Southeast Winds around 5 Mph.
Rainbow Lake Temperature Statistics
September Temperature
Rockwall Municipal Airport (3.7 miles)
Lowest 9 September, 2025
60.8 °FAverage September
76.5 °FHighest 4 September, 2025
98.4 °F
Climate (2020–Present)
Rockwall Municipal Airport (3.7 miles)
Average Low 2020–2025
57.2 °FAverage 2020–2025
66.4 °FAverage High 2020–2025
76.5 °F