Niantic, IL Weather Forecast
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Niantic Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY | SATURDAY NIGHT |
| Mostly Cloudy | Mostly Sunny | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers |
| Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C | Hi: 89°FHi: 32°C Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C Lo: 71°FLo: 22°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C |
| POP: 50% | POP: 50% | POP: 50% | POP: 40% | POP: 40% | POP: 30% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 437 PM CDT Sun Sep 13 2026 

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Issued: 150 PM CDT Sun Sep 13 2026
Key Messages
- Pleasant sleeping weather is expected tonight, with low temperatures in the 50s. Some lows near 50 can`t be ruled out in a few areas north of I-74.
- A significant temperature range is expected Tuesday through Thursday, based on placement of a stationary front. South of the front, highs in the mid 90s are likely, while low-mid 80s are more common north of it.
- Rainfall will be most widespread north of this front as well. Chances of more than an inch of rain range from 50-70% near Galesb...
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