Irvine Slough Weather Forecast
- 50
- 62
Rain Likely
- 47
- 59
Chance Rain
- 43
- 62
Partly Sunny
- 44
- 65
Mostly Sunny
- 45
- 66
Partly Sunny
- 46
- 66
Partly Sunny
Today 21 Apr Lowlands of Western Skagit and Northwestern Snohomish Counties
Mostly cloudy. A slight chance of rain in the late morning and early afternoon. A chance of rain late in the afternoon. Highs in the upper 50s to mid 60s. South wind 10 to 15 Mph becoming southwest in the afternoon.
Tonight 21 Apr Lowlands of Western Skagit and Northwestern Snohomish Counties
Cloudy with a chance of rain. Lows near 50. Southwest wind 10 to 15 Mph becoming west after midnight.
Irvine Slough Temperature Statistics
April Temperature
Arlington Municipal Airport (10.6 miles)
Lowest 8 April, 2026
30 °FAverage April
48.6 °FHighest 18 April, 2026
70 °F
Climate (2021–Present)
Arlington Municipal Airport (10.6 miles)
Average Low 2021–2026
42.6 °FAverage 2021–2026
50.8 °FAverage High 2021–2026
59.9 °F