Weather World
Brant Lake, SD Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Brant Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  | | |  |  | | | | | |
| Mostly Sunny | Partly Cloudy | Clearing | Partly Cloudy | Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Clearing | Partly Cloudy |
| Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C |
| POP: 20% | POP: 40% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 614 AM CDT Sat Aug 29 2026 
Brant Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Brant Lake Weather Map
Brant Lake Quick Facts
Brant Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 638 AM CDT Sat Aug 29 2026
Key Messages
- Scattered showers and thunderstorms will continue to progress through the area through daybreak. The severe weather risk is low but not zero.
- 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.
- Periodic shower and storm chances continue this weekend into early next week. Confidence on any details is low.
Discussion
... Issued at 316 PM CDT Fri Aug 28 20...