Weather in Lake Forest, IL
Lake Forest, Monday, 26 October, 22:20
Clear. Feels like 54°. High 63°, low 51°.
Monthly outlook for Lake Forest, IL: average high 56.1°, average low 45.9°. That is 2.4° above the climate normal for October. Precipitation is expected on 7 days (about 3.1 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 28 October (72.2°), the coolest 7 November (29.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 26 October – 4 November | 62.9° | 53.1° | +5.5° |
| 5 November – 14 November | 44.8° | 48.2° | -1.9° |
| 15 November – 24 November | at normal | 44.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (3 mi).
0
Lake Forest, Tuesday, 27 October
Overcast. High 68°, low 51°.
0
Lake Forest, Wednesday, 28 October
Clear. High 72°, low 51°.
0.02
Lake Forest, Thursday, 29 October
Light rain. High 67°, low 53°.
0Lake Forest, Friday, 30 October
Overcast. High 62°, low 45°.
0.72Lake Forest, Saturday, 31 October
Rain. High 63°, low 55°.
0.13Lake Forest, Sunday, 1 November
Light rain. High 63°, low 54°.
0.01Lake Forest, Monday, 2 November
Light rain. High 56°, low 54°.
0.38Lake Forest, Tuesday, 3 November
Rain. High 58°, low 56°.
0.85Lake Forest, Wednesday, 4 November
Heavy rain. High 58°, low 53°.
0.16
Lake Forest, Thursday, 5 November
Snow. High 52°, low 36°.
0.13Lake Forest, Friday, 6 November
Snow. High 39°, low 31°.
0
Lake Forest, Saturday, 7 November
Partly cloudy. High 39°, low 30°.
0.03Lake Forest, Sunday, 8 November
Light rain. High 44°, low 31°.
0.66Lake Forest, Monday, 9 November
Rain. High 47°, low 43°.
0Lake Forest, Tuesday, 10 November
Overcast. High 47°, low 40°.
0.08
Lake Forest, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Lake Forest, Thursday, 12 November
Climate normal for this date — 60-year average.
0.05Lake Forest, Friday, 13 November
Climate normal for this date — 60-year average.
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.
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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