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Jackson Field, IL Weather Forecast
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Jackson Field Weather Forecast
| REST OF TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
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| Isolated Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Showers | Mostly Cloudy | Mostly Cloudy | Partly Cloudy |
| Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Hi: 75°FHi: 24°C Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C Lo: 65°FLo: 18°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Hi: 69°FHi: 21°C Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C Lo: 55°FLo: 13°C |
| POP: 20% | POP: 30% | POP: 50% | POP: 40% | POP: 40% | POP: 70% | POP: 70% | POP: 60% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1037 AM CDT Thu Sep 17 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1030 AM CDT Thu Sep 17 2026
Key Messages
- Shower and thunderstorm chances will be highest north of I-74 this morning. Some areas could see locally heavy rain and a Flood Watch remains in effect for Knox, Stark and Marshall Counties through 10 AM.
- High heat and humidity will build over portions of central and southeast IL today. A Heat Advisory is in effect until 7 PM south of a Springfield to Robinson line, where afternoon heat indices will peak near 105 degrees.
Discussion
... Issued at 1222 AM CDT Thu Sep 17 2026
A stationary...