Northwest Island Weather Forecast
- 50
- 63
Decreasing Clouds
- 50
- 64
Partly Sunny
- 52
- 63
Mostly Cloudy
- 51
- 59
Mostly Cloudy
- 52
- 61
Partly Sunny
- 52
- 61
Chance Rain
Today 5 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties
Mostly cloudy. A slight chance of rain late in the morning. A slight chance of rain late in the afternoon. Highs in the mid 60s to lower 70s. Light wind becoming northwest to 10 Mph in the afternoon.
Tonight 5 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties
Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 40s to mid 50s. Light wind.
Northwest Island Temperature Statistics
September Temperature
Whidbey Island Naval Air Station - Ault Field (4.3 miles)
Lowest 1 September, 2026
51.1 °FAverage September
60.2 °FHighest 2 September, 2026
68 °F
Climate (2021–2026)
Whidbey Island Naval Air Station - Ault Field (4.3 miles)
Average Low 2021–2026
44.4 °FAverage 2021–2026
50 °FAverage High 2021–2026
56 °F