Gustave, SD Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Gustave Weather Forecast
| REST OF TODAY | TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
| Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Windy | Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Chance of Showers |
| Hi: 95°FHi: 35°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 49°FLo: 9°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 85°FHi: 29°C | Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C | Lo: 49°FLo: 9°C |
| POP: 60% | POP: 50% | POP: 20% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 932 AM MDT Sun Sep 06 2026 

Gustave Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Gustave Weather Map
Gustave Quick Facts
Gustave Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1117 AM MDT Sun Sep 6 2026
Key Messages
- Above average temperatures remain in the forecast. The hottest day will be today with highs in the mid to upper 90s with 80s and 90s expected Sunday and Monday.
- Elevated fire weather conditions are expected through the weekend.
- Isolated to scattered thunderstorms are expected through Sunday, focusing on this evening and Sunday afternoon/evening
Discussion
...(This Afternoon Through Friday) Issued at 1139 AM MDT Sat Sep 5 2026
For the rest of today, isolated storms are drifting northward...
Weather World