Weather in Rock Creek, IL
Rock Creek, Saturday, 8 August, 22:53
Partly cloudy. Feels like 79°. High 88°, low 69°.
Monthly outlook for Rock Creek, IL: average high 85°, average low 67°. That is 0.4° above the climate normal for August. Precipitation is expected on 6 days (about 3.3 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 11 August (103.1°), the coolest 21 August (53.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 86.7° | 84.3° | +1.4° |
| 18 August – 27 August | 82° | 84.3° | -1.3° |
| 28 August – 6 September | at normal | 82.3° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — La Grange (5 mi).
0
Rock Creek, Sunday, 9 August
Overcast. High 94°, low 72°.
0Rock Creek, Monday, 10 August
Overcast. High 100°, low 74°.
0Rock Creek, Tuesday, 11 August
Overcast. High 103°, low 82°.
0.24
Rock Creek, Wednesday, 12 August
Light rain. High 90°, low 71°.
2.43Rock Creek, Thursday, 13 August
Heavy rain. High 81°, low 66°.
0.21Rock Creek, Friday, 14 August
Light rain. High 77°, low 64°.
0.27Rock Creek, Saturday, 15 August
Light rain. High 74°, low 67°.
0Rock Creek, Sunday, 16 August
Overcast. High 78°, low 65°.
0.07Rock Creek, Monday, 17 August
Light rain. High 83°, low 68°.
0Rock Creek, Tuesday, 18 August
Overcast. High 87°, low 68°.
0Rock Creek, Wednesday, 19 August
Overcast. High 80°, low 66°.
0Rock Creek, Thursday, 20 August
Overcast. High 77°, low 58°.
0Rock Creek, Friday, 21 August
Overcast. High 72°, low 53°.
0.11Rock Creek, Saturday, 22 August
Light rain. High 85°, low 62°.
0
Rock Creek, Sunday, 23 August
Mostly clear. High 91°, low 67°.
0.07Rock Creek, Monday, 24 August
Climate normal for this date — 60-year average.
0.11
Rock Creek, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.15Rock Creek, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.06Rock Creek, Thursday, 27 August
Climate normal for this date — 60-year average.
0.09Rock Creek, Friday, 28 August
Climate normal for this date — 60-year average.
0.07Rock Creek, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Rock Creek, Sunday, 30 August
Climate normal for this date — 60-year average.
0.12Rock Creek, Monday, 31 August
Climate normal for this date — 60-year average.
0.13Rock Creek, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.1Rock Creek, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Rock Creek, Thursday, 3 September
Climate normal for this date — 60-year average.
0.08Rock Creek, Friday, 4 September
Climate normal for this date — 60-year average.
0.03Rock Creek, Saturday, 5 September
Climate normal for this date — 60-year average.
0.07Rock Creek, 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 Rock Creek, 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 Rock Creek, 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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