Gretna, SD Weather Forecast
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Gretna Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY |
| Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers |
| Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C Lo: 45°FLo: 7°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C | Hi: 59°FHi: 15°C | Hi: 49°FHi: 9°C Lo: 41°FLo: 5°C | Hi: 49°FHi: 9°C Lo: 41°FLo: 5°C |
| POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 722 PM CDT Mon Oct 05 2026 

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Issued: 611 PM CDT Mon Oct 5 2026
Key Messages
- Above normal temperatures and dry conditions expected through Saturday.
- Signs of cooler temperatures moving in Sunday into Monday of next week, with highs dropping back into the 50s.
Discussion
... Issued at 152 PM CDT Mon Oct 5 2026
Warm front is moving northward across the region this afternoon, with temps rising through the 70s and southerly winds gusting from 20 to 35 mph for most areas east of the Missouri River. For tonight, southwesterly low-level jet at 925mb remains in place ov...
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