Arpan, SD Weather Forecast
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Arpan Weather Forecast
| EARLY THIS MORNING | TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
| Clear | Sunny | Partly Cloudy | Partly Cloudy | Chance of Rain | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Chance of Rain | Rain | Chance of Rain | Chance of Rain |
| Lo: 31°FLo: -1°C | Hi: 59°FHi: 15°C | Lo: 35°FLo: 2°C | Hi: 55°FHi: 13°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 50°FHi: 10°C | Lo: 35°FLo: 2°C | Hi: 50°FHi: 10°C |
| POP: 20% | POP: 70% | POP: 80% | POP: 60% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 322 AM MDT Thu Oct 29 2026 

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Issued: 547 AM MDT Thu Oct 29 2026
Key Messages
-Mild and dry through the rest of the week
-Unsettled and cooler to start next week with a good chance of rain Sunday night into Monday, with high some high elevation snow possible as well
Discussion
...(This Afternoon Through Tuesday) Issued at 1035 AM MDT Wed Oct 28 2026
Mean upper troughing over the PAC NW and western Canada will support general SW flow through the remainder week with weak/dry impulses traversing the flow. Departing impulse giving way to clear skies today as winds shi...
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