Harper, WA Weather Forecast
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Harper Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
| Mostly Cloudy | Mostly Cloudy | Cloudy | Chance of Rain | Chance of T-Storm | Chance of Rain | Partly Cloudy | Mostly Cloudy | Mostly Clear | Mostly Sunny | Mostly Clear | Sunny |
| Lo: 57°FLo: 14°C | Hi: 66°FHi: 19°C | Lo: 57°FLo: 14°C | Hi: 66°FHi: 19°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 70°FHi: 21°C | Lo: 53°FLo: 12°C | Hi: 73°FHi: 23°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 236 PM PDT Thu Sep 10 2026 

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Issued: 245 PM PDT Thu Sep 10 2026
Aviation
... A generally dry cold front pushed through terminals earlier this morning, with the front spanning east of the Cascades down to Vancouver WA this afternoon. The flow pattern aloft will remain influenced by troughs, keeping the flow west/northwest. CLoud coverage has decreased some this afternoon, but remains broken across the interior and around Neah Bay. VFR to MVFR conditions will improve to VFR for all except the coast this afternoon. A weak convergence zone in Puget Sound may prod...
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