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Rosslyn Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
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| Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Partly Cloudy | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Showers Likely | Showers Likely | Partly Cloudy | Partly Cloudy |
| Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Hi: 79°FHi: 26°C Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Hi: 71°FHi: 22°C Lo: 59°FLo: 15°C |
| POP: 40% | POP: 30% | POP: 30% | POP: 40% | POP: 60% | POP: 60% | POP: 60% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 607 PM EDT Fri Sep 18 2026 
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Issued: 638 PM EDT Fri Sep 18 2026
Key Messages
- Well-above normal temperatures persist into the weekend.
- The heat, humidity, and a nearby frontal boundary could foster isolated to scattered thunderstorms across the area at various times over the next several days.
- Rain chances increase early next week as the persistent upper level ridging breaks down.
Aviation
...(For the 18Z TAFS through 18Z Saturday afternoon) ISSUED AT 139 PM EDT FRI SEP 18 2026
At 17z, remnant shower activity continues on a dissipating trend from this morning`s s...