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Interstate Park Weather Forecast
| OVERNIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT |
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| Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear | Partly Cloudy |
| Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C Lo: 70°FLo: 21°C | Hi: 95°FHi: 35°C Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C |
| POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1050 PM CDT Fri Sep 18 2026 
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Issued: 1206 AM CDT Sat Sep 19 2026
Key Messages
Issued at 1230 PM CDT Fri Sep 18 2026- A Heat Advisory remains in effect for eastern Arkansas 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 the Arkansas River Valley and will stay in...