Fort Casey Weather Forecast
- 45
- 51
Rain
- 46
- 56
Rain
- 43
- 52
Rain Likely
- 44
- 51
Chance Rain
- 45
- 53
Rain
- 44
- 53
Rain
- 43
- 54
Rain
Today 9 Dec Island County
Mostly cloudy. A slight chance of rain in the morning. A slight chance of rain early in the Afternoon, then a chance of rain late in the afternoon. Highs in the upper 40s to mid 50s. South wind 10 to 15 Mph becoming southeast in the afternoon.
Tonight 9 Dec Island County
Breezy, rain. Rainfall Amounts a quarter to a half inch possible. Lows in the mid to upper 40s. Southeast wind 10 to 20 Mph becoming south 15 to 25 Mph after midnight. Gusts to 35 Mph.
Fort Casey Temperature Statistics
December Temperature
Whidbey Island Naval Air Station - Ault Field (13 miles)
Lowest 1 December, 2025
34 °FAverage December
45 °FHighest 7 December, 2025
53.1 °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