Weather World
Optimist Park, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Optimist Park Weather Forecast
| REST OF TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT |
 |  | |  |  |  |  |  |  |  | | |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Showers | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Partly Sunny | Partly Cloudy |
| Lo: 70°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Hi: 61°FHi: 16°C Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Hi: 71°FHi: 22°C Lo: 55°FLo: 13°C |
| POP: 50% | POP: 70% | POP: 90% | POP: 80% | POP: 50% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 151 AM CDT Sat Sep 19 2026 
Optimist Park Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Optimist Park Weather Map
Optimist Park Quick Facts
Optimist Park Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 317 AM CDT Sat Sep 19 2026
Key Messages
- Heavy rain and thunderstorms are likely for portions of the area this morning and again this evening into the overnight. Localized flash flooding is the primary concern. Rapid rises on small creeks and streams and the flooding of low-lying areas are possible.
- The ongoing Flood Watch has been expanded southward a few counties across east-central Iowa and far northwestern Illinois, and all of it extended through Sunday morning. Rainfall totals of 1-3 inches are still likely (60-80%) in...