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City of Greenbrier, ARGreenbrier, AR Weather Forecast
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| OVERNIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY |
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| Mostly Clear | Sunny | Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear |
| Lo: 71°FLo: 22°C | Hi: 100°FHi: 38°C | Lo: 71°FLo: 22°C | Hi: 100°FHi: 38°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C Lo: 65°FLo: 18°C | Hi: 91°FHi: 33°C Lo: 65°FLo: 18°C | Hi: 90°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 90°FHi: 32°C Lo: 65°FLo: 18°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1050 PM CDT Thu Sep 17 2026 
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Issued: 229 AM CDT Fri Sep 18 2026
Key Messages
Issued at 228 AM CDT Fri Sep 18 2026- A Heat Advisory remains in effect for the Arkansas River Valley and the Mississippi River Delta through Saturday
- Dry air begins to move into the region, below 30th percentile Min RHs possible through the weekend.
- Little to no rainfall and above average temperatures to continue through the weekend
Discussion
... Issued at 228 AM CDT Fri Sep 18 2026
The 600Dm H500 ridge that has been dominating the region for several weeks now is firmly planted over th...