Fort Casey Weather Forecast
- 38
- 48
Rain
- 38
- 46
Rain
- 37
- 47
Rain
- 37
- 45
Chance Rain
- 36
- 45
Chance Rain
- 38
- 45
Chance Rain/Snow
- 39
- 47
Chance Rain
Today 22 Dec Island County
Windy. Mostly cloudy. A chance of rain in the Morning, then a slight chance of rain early in the afternoon. A chance of rain late in the afternoon. Highs in the mid 40s to lower 50s. South wind 15 to 30 Mph.
Tonight 22 Dec Island County
Windy. Mostly cloudy until early morning then becoming partly cloudy. Rain at Times in the Evening, then a chance of rain after midnight. Rainfall Amounts less than a tenth of an inch likely. Lows near 40. South wind 15 to 30 Mph with Gusts to 45 Mph decreasing to 10 to 20 Mph after midnight.
Fort Casey Temperature Statistics
December Temperature
Whidbey Island Naval Air Station - Ault Field (13 miles)
Lowest 1 December, 2025
34 °FAverage December
47 °FHighest 15 December, 2025
61 °F
Climate (2020–Present)
Whidbey Island Naval Air Station - Ault Field (13 miles)
Average Low 2020–2025
44.5 °FAverage 2020–2025
50.1 °FAverage High 2020–2025
56.1 °F