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Arrow Lake, WA Weather Forecast
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Arrow Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  | |  | |  |  | |  | | |
| Chance of Showers | Mostly Clear | Patchy Fog | Clear | Sunny | Mostly Clear | Partly Sunny | Chance of Rain | Chance of Rain | Partly Cloudy | Partly Sunny | Partly Cloudy |
| Hi: 55°FHi: 13°C | Lo: 40°FLo: 4°C | Hi: 56°FHi: 13°C | Lo: 36°FLo: 2°C | Hi: 60°FHi: 16°C | Lo: 40°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 47°FLo: 8°C | Hi: 63°FHi: 17°C | Lo: 47°FLo: 8°C | Hi: 67°FHi: 19°C | Lo: 46°FLo: 8°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 241 AM PDT Sat Oct 10 2026 
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Issued: 945 AM PDT Sat Oct 10 2026
Aviation
... Northwest flow aloft will become northeasterly late today as an upper level low sinks southward over the Pacific Northwest. A mix of MVFR and VFR ceilings in scattered showers this morning will become VFR most areas this afternoon (after 18Z-20Z) with shower activity diminishing as the upper low shifts southeastward away from Western Washington. Areas of LIFR fog are likely to form in outlying valleys and across the Southwest Interior on Sunday morning. Winds will get breezy for cent...