Weather WorldOnaka, SD Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Onaka Weather Forecast
| REST OF TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  | | | | | |  |  |  |  | |
| Chance of Showers | Patchy Fog | Patchy Fog | Chance of Showers | Chance of Showers | Showers | Chance of Showers | Partly Cloudy | Partly Sunny | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 50°FLo: 10°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C |
| POP: 90% | POP: 20% | POP: 50% | POP: 70% | POP: 20% | POP: 20% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 912 AM CDT Fri Sep 18 2026 
Onaka Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Onaka Weather Map
Onaka Quick Facts
Onaka Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1023 AM CDT Fri Sep 18 2026
Key Messages
- Moderate to heavy rains will persist through the morning hours before tapering off west to east by midday through the afternoon. Heaviest swath of rainfall still expected from parts of south central SD into east central and southeast SD.
- An active pattern will persist this weekend into early next week with a 40-70 percent chance of rain Sunday into Monday.
- Temperatures will remain below seasonal normals the next several days before returning to near normal readings the latter half of...