Prospect Slough - French Island Weather Forecast
- 59
- 87
Sunny
- 61
- 94
Mostly Sunny
- 61
- 92
Mostly Sunny
- 64
- 97
Hot
- 62
- 94
Mostly Sunny
- 61
- 92
Mostly Sunny
- 60
- 90
Mostly Sunny
Today 5 Aug Carquinez Strait and Delta
Sunny. Highs 82 to 88. Southwest Winds 10 to 15 Mph.
Tonight 5 Aug Carquinez Strait and Delta
Clear. Lows 55 to 61. Southwest Winds 10 to 15 Mph.
Prospect Slough - French Island Temperature Statistics
August Temperature
Fairfield / Travis Air Force Base (13.7 miles)
Lowest 2 August, 2025
57 °FAverage August
70.1 °FHighest 2 August, 2025
89.1 °F
Climate (2020–Present)
Fairfield / Travis Air Force Base (13.7 miles)
Average Low 2020–2025
48.5 °FAverage 2020–2025
60.6 °FAverage High 2020–2025
75.5 °F