Weather WorldAlder Lake, WA Weather Forecast
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Alder Lake Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
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| Mostly Cloudy | Mostly Clear | Patchy Fog | Partly Cloudy | Partly Sunny | Chance of Rain | Chance of Rain | Rain | Chance of T-Storm | Chance of Rain | Chance of Rain | Chance of Showers |
| Hi: 70°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 77°FHi: 25°C | Lo: 53°FLo: 12°C | Hi: 73°FHi: 23°C | Lo: 53°FLo: 12°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 67°FHi: 19°C | Lo: 50°FLo: 10°C | Hi: 70°FHi: 21°C | Lo: 50°FLo: 10°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 236 AM PDT Sun Aug 30 2026 
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Issued: 918 AM PDT Sun Aug 30 2026
Aviation
... West to northwest winds continue aloft as an upper level trough continues to depart east and brief ridging moves in. Ceilings are a mix of MVFR and VFR with scattered lower clouds and high clouds draped across the northwestern portions of the region. Expect low clouds to clear out between 18-21Z this morning becoming mostly clear, but mid-level clouds will remain in place over the northwest, including BLI. VFR conditions will then continue through this evening. Guidance is hinting at...