Grand Lake Weather Forecast
- 73
- 97
Hot
- 73
- 98
Hot
- 76
- 97
Hot
- 75
- 95
Chance Thunderstorms
- 75
- 90
Chance Thunderstorms
- 75
- 94
Chance Thunderstorms
Today 22 Jul Montgomery
Mostly sunny. Hot with Highs in the mid 90s. South Winds 5 to 10 Mph. Heat index Values up to 105.
Tonight 22 Jul Montgomery
Mostly clear. Lows in the mid 70s. Southeast Winds 5 to 10 Mph, becoming southwest after midnight.
Grand Lake Temperature Statistics
July Temperature
Conroe, Montgomery County Airport (6.8 miles)
Lowest 3 July, 2025
70.6 °FAverage July
83 °FHighest 1 July, 2025
96.7 °F
Climate (2020–Present)
Conroe, Montgomery County Airport (6.8 miles)
Average Low 2020–2025
58.2 °FAverage 2020–2025
69.1 °FAverage High 2020–2025
80.7 °F