Weather WorldGrass Rope, SD Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Grass Rope Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  |  |  |  | | | | | |
| Chance of T-Storm | Chance of T-Storm | Mostly Clear | Mostly Sunny | Chance of Showers | Chance of Showers | Mostly Cloudy | Chance of Showers | Chance of T-Storm | Chance of Showers | Chance of T-Storm | Chance of Showers |
| Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C |
| POP: 70% | POP: 100% | POP: 40% | POP: 50% | POP: 20% | POP: 60% | POP: 50% | POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 922 PM CDT Sun Sep 13 2026 
Grass Rope Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Grass Rope Weather Map
Grass Rope Quick Facts
Grass Rope Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 631 PM CDT Sun Sep 13 2026
Key Messages
- Cooler than normal temperatures expected through Wednesday (highs in the 60s to low 70s) with the exception of a brief warmup on Monday (highs in the upper 60s to upper 70s over much of the forecast area). A gradual warming trend will begin mid-week and continue through the weekend.
- Confidence is high on widespread rain and perhaps weak thunderstorms overnight tonight through Monday afternoon. Highest probability of rainfall totals that may exceed one inch (55-60% chance) is along a ...