Weather in Lake Forest, IL
Lake Forest, Thursday, 29 October, 23:23
Mostly clear. Feels like 48°. High 68°, low 50°.
Monthly outlook for Lake Forest, IL: average high 57.1°, average low 48.5°. That is 3.8° above the climate normal for October. Precipitation is expected on 6 days (about 1.7 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 3 November (69.9°), the coolest 11 November (36.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 29 October – 7 November | 62.6° | 52.1° | +5.8° |
| 8 November – 17 November | 48° | 46.8° | +0.7° |
| 18 November – 27 November | at normal | 43.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (3 mi).
0.02
Lake Forest, Friday, 30 October
Light rain. High 61°, low 48°.
0.31Lake Forest, Saturday, 31 October
Rain. High 63°, low 52°.
0.03Lake Forest, Sunday, 1 November
Light rain. High 69°, low 51°.
0
Lake Forest, Monday, 2 November
Overcast. High 62°, low 54°.
0.27Lake Forest, Tuesday, 3 November
Light rain. High 70°, low 58°.
0.21Lake Forest, Wednesday, 4 November
Rain. High 65°, low 59°.
0.02Lake Forest, Thursday, 5 November
Light rain. High 60°, low 52°.
0Lake Forest, Friday, 6 November
Overcast. High 54°, low 49°.
0
Lake Forest, Saturday, 7 November
Partly cloudy. High 54°, low 45°.
0Lake Forest, Sunday, 8 November
Overcast. High 50°, low 48°.
0.4Lake Forest, Monday, 9 November
Rain. High 50°, low 45°.
0.03Lake Forest, Tuesday, 10 November
Light rain. High 45°, low 43°.
0Lake Forest, Wednesday, 11 November
Partly cloudy. High 46°, low 36°.
0.3Lake Forest, Thursday, 12 November
Light rain. High 44°, low 42°.
0.09Lake Forest, Friday, 13 November
Light rain. High 52°, low 43°.
0.07Lake Forest, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09Lake Forest, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05
Lake Forest, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Lake Forest, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.11Lake Forest, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.07Lake Forest, Thursday, 19 November
Climate normal for this date — 60-year average.
0.08Lake Forest, Friday, 20 November
Climate normal for this date — 60-year average.
0.11Lake Forest, Saturday, 21 November
Climate normal for this date — 60-year average.
0.04Lake Forest, Sunday, 22 November
Climate normal for this date — 60-year average.
0.08Lake Forest, Monday, 23 November
Climate normal for this date — 60-year average.
0.08Lake Forest, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.09
Lake Forest, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.12Lake Forest, Thursday, 26 November
Climate normal for this date — 60-year average.
0.21Lake Forest, Friday, 27 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 Forest, 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 Forest, 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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