Weather WorldMark, IL Weather Forecast
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| TODAY | TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY |
 |  | | | | |  | |  |  | | |
| Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Sunny | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear | Mostly Sunny |
| Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 646 AM CDT Sun Sep 06 2026 
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Issued: 638 AM CDT Sun Sep 6 2026
Key Messages
- The break in the heat will last through Monday night, followed by hot weather Tuesday and Wednesday, with highs reaching the 90s, but with substantially lower humidity values than recent weather.
- Showers and storms, some of which may be severe, are likely (60- 90%) Tuesday afternoon through the overnight hours. SPC has issued a Marginal, level 1 of 5, risk for severe storms along and north of an Ottumwa to Muscatine to Galena line.
Aviation
/12Z TAFS THROUGH 12Z MONDAY/... Issued at 63...