Weather WorldSiouxon Trail, WA Weather Forecast
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Siouxon Trail Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 | | |  | | | | |  |  |  |  |
| Patchy Fog | Patchy Fog | Patchy Fog | Clearing | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Partly Cloudy | Mostly Sunny | Mostly Clear | Chance of Rain |
| Lo: 51°FLo: 11°C | Hi: 80°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 501 PM PDT Sat Aug 15 2026 
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Siouxon Trail Forecast Discussion
Issued: 610 PM PDT Sat Aug 15 2026
Discussion
...Now through Friday...Seasonable conditions with no weather impacts expected through the next week. The large-scale pattern looks to remain fairly stagnant through the period, with broad and relatively flat upper-level ridging over the majority of CONUS and weak positively-tilted upper troughing over the Northeast Pacific. This pattern will support continued onshore flow, maintaining near-normal daily high temperatures in the 80s within inland valleys an...