Bismark Lake, SD Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Bismark Lake Weather Forecast
| EARLY THIS MORNING | TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
| Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Rain | Rain | Chance of Snow | Chance of Snow |
| Lo: 30°FLo: -1°C | Hi: 59°FHi: 15°C | Lo: 39°FLo: 4°C | Hi: 55°FHi: 13°C | Lo: 41°FLo: 5°C | Hi: 60°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 59°FHi: 15°C | Lo: 41°FLo: 5°C | Hi: 45°FHi: 7°C | Lo: 35°FLo: 2°C | Hi: 45°FHi: 7°C |
| POP: 80% | POP: 70% | POP: 60% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 322 AM MDT Thu Oct 29 2026 

Bismark Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Bismark Lake Weather Map
Bismark Lake Quick Facts
Bismark Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 547 AM MDT Thu Oct 29 2026
Key Messages
-Mild and dry through the rest of the week
-Unsettled and cooler to start next week with a good chance of rain Sunday night into Monday, with high some high elevation snow possible as well
Discussion
...(This Afternoon Through Tuesday) Issued at 1035 AM MDT Wed Oct 28 2026
Mean upper troughing over the PAC NW and western Canada will support general SW flow through the remainder week with weak/dry impulses traversing the flow. Departing impulse giving way to clear skies today as winds shi...
Weather World