Weather WorldGrettum School, WI Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Grettum School Weather Forecast
| THIS AFTERNOON | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  | |  | | |  |  |  | | |  |
| Sunny | Clear | Sunny | Patchy Fog | Patchy Fog | Mostly Clear | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy |
| Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 70°FHi: 21°C | Lo: 40°FLo: 4°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 70°FHi: 21°C Lo: 45°FLo: 7°C | Hi: 70°FHi: 21°C Lo: 45°FLo: 7°C | Hi: 55°FHi: 13°C | Hi: 51°FHi: 11°C Lo: 35°FLo: 2°C |
| POP: 20% | POP: 40% | POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 306 PM CDT Tue Oct 20 2026 
Grettum School Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Grettum School Weather Map
Grettum School Quick Facts
Grettum School Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 121 PM CDT Tue Oct 20 2026
Key Messages
- Above normal temperatures through Saturday.
- Next chance of rain (20-40%) is Friday afternoon into Saturday.
- Near-normal temperatures return Sunday.
Discussion
... Issued at 121 PM CDT Tue Oct 20 2026
SYNOPTIC:
A complex split-flow regime was found aloft over the North American continent early this afternoon. A cutoff low was positioned off the coast of California with a broad relatively flat ridge farther east across the Canadian Prairies into Ontario. A northern jet stream with several ...