Weather WorldAltamont, SD Weather Forecast
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Altamont Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  |  | |  |  | | | | | | |
| Chance of Showers | Mostly Cloudy | Partly Cloudy | Partly Sunny | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Partly Sunny |
| Lo: 45°FLo: 7°C | Hi: 59°FHi: 15°C | Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Hi: 65°FHi: 18°C Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C Lo: 55°FLo: 13°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C |
| POP: 20% | POP: 90% | POP: 20% | POP: 30% | POP: 30% | POP: 50% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 422 PM CDT Mon Sep 21 2026 
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Issued: 1224 PM CDT Mon Sep 21 2026
Key Messages
- There will be a brief break on Tuesday before spotty chances of rain return Tuesday night across central South Dakota. Occasional rain chances continue Wednesday through the end of the week with the highest chances (50-80%) Wednesday afternoon through Thursday morning.
- Temperatures will remain near to slightly below seasonal averages through Tuesday before climbing above normal Wednesday.
Discussion
... Issued at 1223 PM CDT Mon Sep 21 2026
The upper low is centered around Sioux City la...