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Rousseau Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY |
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| Chance of Showers | Showers | Chance of Showers | Mostly Cloudy | Partly Sunny | Mostly Cloudy | Chance of Showers | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy |
| Hi: 61°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C |
| POP: 90% | POP: 100% | POP: 50% | POP: 20% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 512 AM CDT Sun Sep 20 2026 
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Meteorlogic Glosserator
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Issued: 616 AM CDT Sun Sep 20 2026
Key Messages
- Low clouds will persist into Monday and may result in periods of reduced visibility along higher terrain.
- Steady showers move into central SD today and make it as far east as parts of the James and Big Sioux Valleys tonight. Rain tapers off from north to south on Monday.
- Temperatures will remain below seasonal normals the next few days before returning to near normal toward the middle of the week.
Discussion
... Issued at 252 AM CDT Sun Sep 20 2026
Weak shortwave ridging aloft across ea...