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Herman Slough, SD Weather Forecast
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Herman Slough Weather Forecast
| REST OF TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  | |  | |  | | | | |
| Chance of T-Storm | Mostly Sunny | Partly Cloudy | Clearing | Partly Cloudy | Chance of T-Storm | Partly Cloudy | Mostly Cloudy | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C |
| POP: 70% | POP: 20% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1248 AM CDT Sat Aug 29 2026 
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Issued: 1215 AM CDT Sat Aug 29 2026
Key Messages
- Warm and humid conditions continue into the weekend. Afternoon heat indices may approach 100F in portions of the Missouri River Valley Saturday/Sunday as temperatures climb into the 90s.
- A Marginal Risk (level 1 of 5) for severe thunderstorms remains in place into early Saturday morning. Widespread severe weather is not expected, but isolated stronger storms may produce up to ping pong ball sized hail and 60 mph wind gusts.
- Periodic shower and storm chances continue this weekend into...