Weather in Lake Bluff, IL
Lake Bluff, Saturday, 8 August, 18:24
Clear. Feels like 80°. High 82°, low 68°.
Monthly outlook for Lake Bluff, IL: average high 76.5°, average low 65.3°. That is 0.8° below the climate normal for August. Precipitation is expected on 6 days (about 2.7 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 9 August (83.4°), the coolest 23 August (57.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 78.3° | 78.1° | +0.1° |
| 18 August – 27 August | 73.5° | 77.8° | -2.4° |
| 28 August – 6 September | at normal | 76.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (6 mi).
1.11
Lake Bluff, Sunday, 9 August
Heavy rain. High 83°, low 66°.
0.31Lake Bluff, Monday, 10 August
Heavy rain. High 80°, low 71°.
0.59Lake Bluff, Tuesday, 11 August
Heavy rain. High 82°, low 69°.
0
Lake Bluff, Wednesday, 12 August
Overcast. High 82°, low 68°.
0.09Lake Bluff, Thursday, 13 August
Light rain. High 71°, low 63°.
0Lake Bluff, Friday, 14 August
Clear. High 71°, low 62°.
0Lake Bluff, Saturday, 15 August
Overcast. High 74°, low 59°.
0
Lake Bluff, Sunday, 16 August
Partly cloudy. High 79°, low 63°.
0.04Lake Bluff, Monday, 17 August
Light rain. High 78°, low 69°.
0Lake Bluff, Tuesday, 18 August
Partly cloudy. High 77°, low 69°.
0.35Lake Bluff, Wednesday, 19 August
Rain. High 80°, low 68°.
0.02Lake Bluff, Thursday, 20 August
Light rain. High 75°, low 67°.
0Lake Bluff, Friday, 21 August
Overcast. High 74°, low 65°.
0.11Lake Bluff, Saturday, 22 August
Light rain. High 72°, low 60°.
0
Lake Bluff, Sunday, 23 August
Mostly clear. High 63°, low 57°.
0.11Lake Bluff, Monday, 24 August
Climate normal for this date — 60-year average.
0.07Lake Bluff, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.14
Lake Bluff, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.1Lake Bluff, Thursday, 27 August
Climate normal for this date — 60-year average.
0.12Lake Bluff, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Lake Bluff, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Lake Bluff, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Lake Bluff, Monday, 31 August
Climate normal for this date — 60-year average.
0.1Lake Bluff, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.04Lake Bluff, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Lake Bluff, Thursday, 3 September
Climate normal for this date — 60-year average.
0.08Lake Bluff, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Lake Bluff, Saturday, 5 September
Climate normal for this date — 60-year average.
0.09Lake Bluff, Sunday, 6 September
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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