Weather WorldHarrison, SD Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Harrison Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  | |  |  | | | | |  | |
| Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Showers | Showers | Showers | Showers | Chance of Showers | Chance of Showers |
| Lo: 41°FLo: 5°C | Hi: 55°FHi: 13°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 55°FHi: 13°C | Lo: 41°FLo: 5°C | Hi: 50°FHi: 10°C |
| POP: 20% | POP: 50% | POP: 20% | POP: 70% | POP: 90% | POP: 70% | POP: 70% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 614 PM CDT Thu Oct 29 2026 
Harrison Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Harrison Weather Map
Harrison Quick Facts
Harrison Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 650 PM CDT Thu Oct 29 2026
Key Messages
- Showers and very isolated thunderstorms will be possible Friday night into Saturday morning, mainly near and east of Highway 81. Drizzle and spotty showers will be possible west of Highway 81.
- More widespread rain returns later Sunday night into Monday. The EC/GFS and Canadian ensembles suggest about a 40-70 percent for more than an inch of rain.
Discussion
... Issued at 104 PM CDT Thu Oct 29 2026
Weak ridging aloft moves through the area tonight into Friday. This will allow for an incr...