Weather in Lake Bluff, IL
Lake Bluff, Sunday, 18 October, 18:36
Clear. Feels like 54°. High 63°, low 41°.
Monthly outlook for Lake Bluff, IL: average high 61.4°, average low 49.4°. That is 3.5° above the climate normal for October. Precipitation is expected on 4 days (about 1.3 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 24 October (68.7°), the coolest 18 October (40.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 62.4° | 56.2° | +3.5° |
| 28 October – 6 November | 59.6° | 52.4° | +4° |
| 7 November – 16 November | at normal | 47.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Park City (5 mi).
0
Lake Bluff, Monday, 19 October
Clear. High 66°, low 43°.
0
Lake Bluff, Tuesday, 20 October
Mostly clear. High 62°, low 46°.
0Lake Bluff, Wednesday, 21 October
Clear. High 66°, low 45°.
0.01
Lake Bluff, Thursday, 22 October
Light rain. High 63°, low 49°.
0Lake Bluff, Friday, 23 October
Mostly clear. High 61°, low 52°.
0
Lake Bluff, Saturday, 24 October
Overcast. High 69°, low 50°.
0Lake Bluff, Sunday, 25 October
Overcast. High 64°, low 56°.
0.04Lake Bluff, Monday, 26 October
Light rain. High 56°, low 53°.
0Lake Bluff, Tuesday, 27 October
Overcast. High 55°, low 52°.
0Lake Bluff, Wednesday, 28 October
Overcast. High 58°, low 55°.
0.01Lake Bluff, Thursday, 29 October
Light rain. High 67°, low 55°.
0.19Lake Bluff, Friday, 30 October
Rain. High 66°, low 52°.
0Lake Bluff, Saturday, 31 October
Clear. High 59°, low 46°.
0.47Lake Bluff, Sunday, 1 November
Rain. High 55°, low 51°.
0.57Lake Bluff, Monday, 2 November
Rain. High 54°, low 44°.
0.06
Lake Bluff, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.1Lake Bluff, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.11Lake Bluff, Thursday, 5 November
Climate normal for this date — 60-year average.
0.08Lake Bluff, Friday, 6 November
Climate normal for this date — 60-year average.
0.05Lake Bluff, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Lake Bluff, Sunday, 8 November
Climate normal for this date — 60-year average.
0.12
Lake Bluff, Monday, 9 November
Climate normal for this date — 60-year average.
0.11Lake Bluff, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.08Lake Bluff, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Lake Bluff, Thursday, 12 November
Climate normal for this date — 60-year average.
0.05Lake Bluff, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Lake Bluff, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09Lake Bluff, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Lake Bluff, Monday, 16 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 Lake Bluff, 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 Lake Bluff, 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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