Castle Lake Weather Forecast
- 60
- 76
Sunny
- 57
- 78
Slight Chance Thunderstorms
- 54
- 70
Sunny
- 55
- 72
Mostly Sunny
- 59
- 76
Sunny
- 60
- 80
Sunny
- 60
- 80
Sunny
Today 6 Jul South Central Siskiyou County
Sunny. Highs in the mid 80s to mid 90s. Northeast Winds around 5 Mph shifting to the south late this afternoon.
Tonight 6 Jul South Central Siskiyou County
Clear. Lows in the lower 50s to lower 60s. Southwest Winds around 5 Mph shifting to the north after midnight.
Castle Lake Temperature Statistics
July Temperature
Mount Shasta (6.8 miles)
Lowest 4 July, 2025
48.9 °FAverage July
67.6 °FHighest 1 July, 2025
84.9 °F
Climate (2020–Present)
Mount Shasta (6.8 miles)
Average Low 2020–2025
39.6 °FAverage 2020–2025
52.5 °FAverage High 2020–2025
65.7 °F