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City of Union, ORUnion, OR Weather Forecast
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| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT |
 |  |  | | |  |  |  | | |  | |
| Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers |
| Lo: 40°FLo: 4°C | Hi: 63°FHi: 17°C | Lo: 40°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 60°FHi: 16°C | Hi: 66°FHi: 19°C Lo: 40°FLo: 4°C | Hi: 66°FHi: 19°C Lo: 40°FLo: 4°C | Hi: 79°FHi: 26°C Lo: 50°FLo: 10°C | Hi: 79°FHi: 26°C Lo: 50°FLo: 10°C | Hi: 76°FHi: 24°C Lo: 50°FLo: 10°C | Hi: 76°FHi: 24°C Lo: 50°FLo: 10°C |
| POP: 50% | POP: 50% | POP: 20% | POP: 70% | POP: 70% | POP: 50% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 302 PM PDT Fri Sep 04 2026 
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Issued: 314 PM PDT Fri Sep 4 2026
Key Messages
- Much cooler than average temperatures persist into the weekend as much as 8-12 degrees with a warming trend beginning Monday into mid-week.
- Unsettled weather with low chances of thunderstorms (15-25%) persisting into early next week.
- Little to low fire weather concerns owing to elevated afternoon humidity and showery weather.
Discussion
... Latest water vapor imagery shows a complex mid- level closed low over northwest OR with a shortwave trough moving into southeast BC. Additional emb...