| National Weather Service Forecast for:
Mount Prospect IL Issued by: National Weather Service Chicago, IL |
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| Updated: 1:22 pm CDT Oct 20, 2026 | ||||||||||||||||||
|
| This Afternoon |
Sunny, with a high near 68. East wind around 5 mph. |
| Tonight |
Areas of fog after 3am. Otherwise, increasing clouds, with a low around 44. East wind around 5 mph becoming calm in the evening. |
| Wednesday |
Areas of fog before 8am. Otherwise, sunny, with a high near 70. Calm wind becoming west southwest around 5 mph. |
| Wednesday Night |
Partly cloudy, with a low around 50. Calm wind. |
| Thursday |
Mostly sunny, with a high near 70. Calm wind becoming east northeast around 5 mph in the afternoon. |
| Thursday Night |
Mostly clear, with a low around 50. |
| Friday |
Sunny, with a high near 69. |
| Friday Night |
Partly cloudy, with a low around 51. |
| Saturday |
Mostly sunny, with a high near 70. |
| Saturday Night |
Mostly cloudy, with a low around 54. |
| Sunday |
Partly sunny, with a high near 71. |
| Sunday Night |
Mostly cloudy, with a low around 52. |
| Monday |
Partly sunny, with a high near 64. |
Forecast from NOAA-NWS for Mount Prospect IL.
