Weather in Buffalo Grove, IL
Buffalo Grove, Sunday, 9 August, 15:46
Overcast. Feels like 78°. High 79°, low 62°.
Monthly outlook for Buffalo Grove, IL: average high 82.1°, average low 67.6°. That is 2.4° above the climate normal for August. Precipitation is expected on 9 days (about 2.9 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 10 August (89.4°), the coolest 9 August (62.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 82.1° | 77.9° | +2.3° |
| 19 August – 28 August | 81.9° | 77.8° | +2.3° |
| 29 August – 7 September | at normal | 76.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Highwood (8 mi).
0.39
Buffalo Grove, Monday, 10 August
Rain. High 89°, low 72°.
0.45Buffalo Grove, Tuesday, 11 August
Heavy rain. High 82°, low 71°.
0Buffalo Grove, Wednesday, 12 August
Overcast. High 82°, low 66°.
0.01Buffalo Grove, Thursday, 13 August
Light rain. High 83°, low 68°.
0.1Buffalo Grove, Friday, 14 August
Light rain. High 77°, low 69°.
0.46Buffalo Grove, Saturday, 15 August
Rain. High 89°, low 70°.
0Buffalo Grove, Sunday, 16 August
Overcast. High 79°, low 68°.
0.17Buffalo Grove, Monday, 17 August
Light rain. High 74°, low 65°.
0.05Buffalo Grove, Tuesday, 18 August
Light rain. High 86°, low 71°.
0Buffalo Grove, Wednesday, 19 August
Overcast. High 84°, low 69°.
0.1Buffalo Grove, Thursday, 20 August
Light rain. High 87°, low 70°.
0.15Buffalo Grove, Friday, 21 August
Rain. High 77°, low 66°.
0
Buffalo Grove, Saturday, 22 August
Clear. High 78°, low 63°.
0Buffalo Grove, Sunday, 23 August
Overcast. High 81°, low 64°.
0.03Buffalo Grove, Monday, 24 August
Light rain. High 85°, low 69°.
0.07
Buffalo Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.14
Buffalo Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.1Buffalo Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
0.12Buffalo Grove, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Buffalo Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Buffalo Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Buffalo Grove, Monday, 31 August
Climate normal for this date — 60-year average.
0.1Buffalo Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.04Buffalo Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Buffalo Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
0.08Buffalo Grove, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Buffalo Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
0.09Buffalo Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
0.07Buffalo Grove, Monday, 7 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 Buffalo Grove, 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 Buffalo Grove, 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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