Weather in Bannockburn, IL
Bannockburn, Sunday, 15 November, 07:28
Clear. Feels like 31°. High 49°, low 30°.
Monthly outlook for Bannockburn, IL: average high 51.2°, average low 40.1°. That is 4.4° above the climate normal for November. Precipitation is expected on 1 day (about 0.4 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 19 November (60.9°), the coolest 15 November (30.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 November – 24 November | 53° | 44.6° | +4.7° |
| 25 November – 4 December | 48.2° | 40.1° | +4.5° |
| 5 December – 14 December | at normal | 36° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (3 mi).
0Bannockburn, Monday, 16 November
Clear. High 52°, low 31°.
0Bannockburn, Tuesday, 17 November
Clear. High 53°, low 36°.
0
Bannockburn, Wednesday, 18 November
Overcast. High 55°, low 40°.
0Bannockburn, Thursday, 19 November
Clear. High 61°, low 47°.
0Bannockburn, Friday, 20 November
Overcast. High 53°, low 38°.
0.01
Bannockburn, Saturday, 21 November
Light rain. High 61°, low 52°.
0Bannockburn, Sunday, 22 November
Clear. High 55°, low 39°.
0Bannockburn, Monday, 23 November
Overcast. High 45°, low 37°.
0Bannockburn, Tuesday, 24 November
Overcast. High 45°, low 40°.
0
Bannockburn, Wednesday, 25 November
Partly cloudy. High 50°, low 38°.
0Bannockburn, Thursday, 26 November
Overcast. High 55°, low 44°.
0.35Bannockburn, Friday, 27 November
Rain. High 49°, low 46°.
0Bannockburn, Saturday, 28 November
Clear. High 49°, low 40°.
0Bannockburn, Sunday, 29 November
Overcast. High 45°, low 43°.
0Bannockburn, Monday, 30 November
Overcast. High 41°, low 39°.
0.15
Bannockburn, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.07Bannockburn, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.09Bannockburn, Thursday, 3 December
Climate normal for this date — 60-year average.
0.06Bannockburn, Friday, 4 December
Climate normal for this date — 60-year average.
0.08Bannockburn, Saturday, 5 December
Climate normal for this date — 60-year average.
0.06Bannockburn, Sunday, 6 December
Climate normal for this date — 60-year average.
0.12Bannockburn, Monday, 7 December
Climate normal for this date — 60-year average.
0.08Bannockburn, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.09Bannockburn, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.09Bannockburn, Thursday, 10 December
Climate normal for this date — 60-year average.
0.11Bannockburn, Friday, 11 December
Climate normal for this date — 60-year average.
0.09Bannockburn, Saturday, 12 December
Climate normal for this date — 60-year average.
0.06Bannockburn, Sunday, 13 December
Climate normal for this date — 60-year average.
0.11Bannockburn, Monday, 14 December
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 Bannockburn, 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 Bannockburn, 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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