Weather in Big Rock, IL
Big Rock, Thursday, 22 October, 16:38
Clear. Feels like 71°. High 72°, low 45°.
Monthly outlook for Big Rock, IL: average high 60.3°, average low 46.1°. That is 2.5° above the climate normal for October. Precipitation is expected on 2 days (about 1.9 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 22 October (72.4°), the coolest 3 November (39.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 22 October – 31 October | 64.2° | 57.3° | +3.8° |
| 1 November – 10 November | 53.9° | 52.6° | +0.7° |
| 11 November – 20 November | at normal | 47.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Boulder Hill (11 mi).
0Big Rock, Friday, 23 October
Clear. High 72°, low 46°.
0
Big Rock, Saturday, 24 October
Mostly clear. High 68°, low 45°.
0
Big Rock, Sunday, 25 October
Partly cloudy. High 71°, low 50°.
0
Big Rock, Monday, 26 October
Overcast. High 66°, low 50°.
0Big Rock, Tuesday, 27 October
Overcast. High 64°, low 50°.
0Big Rock, Wednesday, 28 October
Overcast. High 61°, low 49°.
0.41
Big Rock, Thursday, 29 October
Rain. High 57°, low 51°.
1.51Big Rock, Friday, 30 October
Heavy rain. High 54°, low 48°.
0Big Rock, Saturday, 31 October
Partly cloudy. High 55°, low 42°.
0Big Rock, Sunday, 1 November
Overcast. High 53°, low 46°.
0Big Rock, Monday, 2 November
Overcast. High 54°, low 42°.
0Big Rock, Tuesday, 3 November
Mostly clear. High 53°, low 39°.
0Big Rock, Wednesday, 4 November
Overcast. High 54°, low 42°.
0Big Rock, Thursday, 5 November
Overcast. High 55°, low 43°.
0Big Rock, Friday, 6 November
Overcast. High 54°, low 48°.
0.05Big Rock, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Big Rock, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11
Big Rock, Monday, 9 November
Climate normal for this date — 60-year average.
0.12Big Rock, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.06Big Rock, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Big Rock, Thursday, 12 November
Climate normal for this date — 60-year average.
0.05Big Rock, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Big Rock, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09Big Rock, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Big Rock, Monday, 16 November
Climate normal for this date — 60-year average.
0.1Big Rock, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.13Big Rock, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.07Big Rock, Thursday, 19 November
Climate normal for this date — 60-year average.
0.08Big Rock, Friday, 20 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 Big Rock, 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 Big Rock, 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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