Weather in Chillicothe, IL
Chillicothe, Tuesday, 20 October, 03:24
Partly cloudy. Feels like 48°. High 72°, low 45°.
Monthly outlook for Chillicothe, IL: average high 60.9°, average low 43.3°. That is 1.6° above the climate normal for October. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 21 October (73.5°), the coolest 28 October (27.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 61.9° | 59.2° | +1.5° |
| 30 October – 8 November | 59.4° | 54.9° | +2.5° |
| 9 November – 18 November | at normal | 49.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Peoria (13 mi).
0
Chillicothe, Wednesday, 21 October
Clear. High 74°, low 44°.
0Chillicothe, Thursday, 22 October
Clear. High 71°, low 49°.
0Chillicothe, Friday, 23 October
Clear. High 68°, low 49°.
0
Chillicothe, Saturday, 24 October
Overcast. High 66°, low 47°.
0Chillicothe, Sunday, 25 October
Overcast. High 69°, low 51°.
0.24
Chillicothe, Monday, 26 October
Light rain. High 60°, low 51°.
0.65Chillicothe, Tuesday, 27 October
Rain. High 49°, low 35°.
0Chillicothe, Wednesday, 28 October
Clear. High 41°, low 28°.
0Chillicothe, Thursday, 29 October
Clear. High 50°, low 29°.
0
Chillicothe, Friday, 30 October
Mostly clear. High 55°, low 36°.
0
Chillicothe, Saturday, 31 October
Partly cloudy. High 64°, low 43°.
0.02Chillicothe, Sunday, 1 November
Light rain. High 62°, low 49°.
0.33Chillicothe, Monday, 2 November
Rain. High 58°, low 51°.
0Chillicothe, Tuesday, 3 November
Mostly clear. High 60°, low 46°.
0Chillicothe, Wednesday, 4 November
Mostly clear. High 58°, low 42°.
0.13Chillicothe, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09Chillicothe, Friday, 6 November
Climate normal for this date — 60-year average.
0.04Chillicothe, Saturday, 7 November
Climate normal for this date — 60-year average.
0.05Chillicothe, Sunday, 8 November
Climate normal for this date — 60-year average.
0.14
Chillicothe, Monday, 9 November
Climate normal for this date — 60-year average.
0.15Chillicothe, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Chillicothe, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.07Chillicothe, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Chillicothe, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Chillicothe, Saturday, 14 November
Climate normal for this date — 60-year average.
0.07Chillicothe, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06Chillicothe, Monday, 16 November
Climate normal for this date — 60-year average.
0.12Chillicothe, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.14Chillicothe, Wednesday, 18 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Chillicothe, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Chillicothe, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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