Keystone Weather Forecast
- 39
- 48
Slight Chance Rain
- 39
- 45
Rain
- 35
- 45
Rain
- 34
- 41
Mostly Cloudy
- 36
- 42
Mostly Cloudy
- 37
- 45
Mostly Cloudy
- 38
- 46
Mostly Cloudy
Today 24 Dec Island County
Windy. A chance of rain late in the Morning, then rain at Times early in the afternoon. Rain likely late in the afternoon. Rainfall Amounts a tenth to a quarter of an inch possible. Highs near 50. North wind 10 to 15 Mph increasing to south 20 to 35 Mph with Gusts to 55 Mph in the afternoon.
Tonight 24 Dec Island County
Windy. Partly cloudy then becoming mostly cloudy in the late evening and early morning then becoming partly cloudy. A slight chance of rain in the evening. Lows near 40. South wind 20 to 30 Mph becoming east to 10 Mph after midnight.
Keystone Temperature Statistics
December Temperature
Whidbey Island Naval Air Station - Ault Field (13 miles)
Lowest 1 December, 2025
34 °FAverage December
46.8 °FHighest 15 December, 2025
61 °F
Climate (2020–Present)
Whidbey Island Naval Air Station - Ault Field (13 miles)
Average Low 2020–2025
44.6 °FAverage 2020–2025
50.1 °FAverage High 2020–2025
56.1 °F