Harrisburg Weather Forecast
Weather forecast for: Harrisburg IL
Last Update: 12:26 pm CST Nov 14, 2026
This Afternoon: Sunny, with a high near 51. Light north northwest wind.
Tonight: Mostly clear, with a low around 28. Calm wind.
Sunday: Mostly sunny, with a high near 55. Calm wind.
Sunday Night: Mostly clear, with a low around 27. Calm wind.
Monday: Sunny, with a high near 57. Calm wind.
Monday Night: Clear, with a low around 27. Calm wind.
Tuesday: Sunny, with a high near 61. Calm wind.
Tuesday Night: Clear, with a low around 32. Calm wind.
Wednesday: Sunny, with a high near 65. Calm wind becoming south 5 to 8 mph.
Wednesday Night: Partly cloudy, with a low around 39. Calm wind.
Thursday: Mostly sunny, with a high near 67. Calm wind becoming south southwest 5 to 8 mph.
Thursday Night: Partly cloudy, with a low around 45. Calm wind.
Friday: Mostly sunny, with a high near 71. Calm wind becoming south around 5 mph.