Weather in Poplar Grove, IL
Poplar Grove, Sunday, 9 August, 13:57
Overcast. Feels like 78°. High 82°, low 62°.
Monthly outlook for Poplar Grove, IL: average high 79.9°, average low 64.1°. That is 0.1° above the climate normal for August. Precipitation is expected on 11 days (about 2.7 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 15 August (87.1°), the coolest 22 August (55.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 79.8° | 79.8° | +0° |
| 19 August – 28 August | 79.9° | 79.8° | +0° |
| 29 August – 7 September | at normal | 78° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Rockford (13 mi).
0.15
Poplar Grove, Monday, 10 August
Light rain. High 86°, low 70°.
0.37Poplar Grove, Tuesday, 11 August
Heavy rain. High 81°, low 68°.
0.01Poplar Grove, Wednesday, 12 August
Light rain. High 81°, low 64°.
0.05Poplar Grove, Thursday, 13 August
Light rain. High 77°, low 63°.
0.17Poplar Grove, Friday, 14 August
Light rain. High 76°, low 65°.
0.5Poplar Grove, Saturday, 15 August
Rain. High 87°, low 68°.
0Poplar Grove, Sunday, 16 August
Light rain. High 74°, low 64°.
0.27Poplar Grove, Monday, 17 August
Light rain. High 71°, low 60°.
0.06Poplar Grove, Tuesday, 18 August
Light rain. High 84°, low 68°.
0Poplar Grove, Wednesday, 19 August
Overcast. High 82°, low 65°.
0.13Poplar Grove, Thursday, 20 August
Light rain. High 84°, low 67°.
0.12Poplar Grove, Friday, 21 August
Rain. High 73°, low 59°.
0
Poplar Grove, Saturday, 22 August
Clear. High 78°, low 56°.
0Poplar Grove, Sunday, 23 August
Overcast. High 79°, low 60°.
0.07Poplar Grove, Monday, 24 August
Light rain. High 84°, low 66°.
0.07
Poplar Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.16Poplar Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Poplar Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15
Poplar Grove, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Poplar Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
0.06Poplar Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Poplar Grove, Monday, 31 August
Climate normal for this date — 60-year average.
0.09Poplar Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.05Poplar Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11Poplar Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Poplar Grove, Friday, 4 September
Climate normal for this date — 60-year average.
0.06Poplar Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Poplar Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
0.12Poplar 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 Poplar 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 Poplar 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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