Diamond, IL Weather Forecast
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| THIS AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
| Mostly Cloudy | Clearing | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Sunny | Mostly Clear | Partly Cloudy | Chance of Showers | Showers | Showers |
| Hi: 69°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 61°FLo: 16°C |
| POP: 50% | POP: 60% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 121 PM CDT Fri Sep 25 2026 

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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1244 PM CDT Fri Sep 25 2026
Key Messages
- Near to slightly below normal temperatures are forecasted over the next several days.
- The next chance for a widespread soaking rainfall won`t come until at least the middle of next week.
Discussion
... Issued at 1244 PM CDT Fri Sep 25 2026
Over the next few days, a deepening coastal low along the northeastern seaboard on the eastern flank of an upper-level ridge over Upper Midwest will reinforce a Rex-like blocking pattern across the Great Lakes. As a result, relatively quiescent condit...
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