Diablo Lake Weather Forecast
- 51
- 68
Mostly Sunny
- 52
- 73
Increasing Clouds
- 53
- 72
Partly Sunny
- 55
- 76
Mostly Sunny
- 58
- 80
Sunny
- 61
- 85
Sunny
- 62
- 87
Mostly Sunny
Today 3 Jul Foothills and Valleys of the North Cascades
Mostly sunny. Highs in the upper 60s to mid 70s. Light wind becoming west around 10 Mph in the afternoon.
Tonight 3 Jul Foothills and Valleys of the North Cascades
Partly cloudy. Lows near 50. West wind to 10 Mph in the evening becoming light.
Diablo Lake Temperature Statistics
July Temperature
Arlington Municipal Airport (60.9 miles)
Lowest 1 July, 2025
54 °FAverage July
65.8 °FHighest 1 July, 2025
79 °F
Climate (2020–Present)
Arlington Municipal Airport (60.9 miles)
Average Low 2020–2025
42.3 °FAverage 2020–2025
50.5 °FAverage High 2020–2025
59.6 °F