Weather in Machesney Park, IL
Machesney Park, Sunday, 9 August, 15:03
Overcast. Feels like 85°. High 82°, low 63°.
Monthly outlook for Machesney Park, IL: average high 80.7°, average low 64.4°. That is 0.6° above the climate normal for August. Precipitation is expected on 10 days (about 2.6 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 15 August (87.7°), the coolest 22 August (55.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.6° | 79.8° | +0.4° |
| 19 August – 28 August | 81° | 79.8° | +0.7° |
| 29 August – 7 September | at normal | 78° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Rockford (8 mi).
0.16
Machesney Park, Monday, 10 August
Rain. High 87°, low 70°.
0.35Machesney Park, Tuesday, 11 August
Heavy rain. High 82°, low 67°.
0.02Machesney Park, Wednesday, 12 August
Light rain. High 82°, low 65°.
0.07Machesney Park, Thursday, 13 August
Light rain. High 78°, low 64°.
0.18Machesney Park, Friday, 14 August
Light rain. High 77°, low 66°.
0.53Machesney Park, Saturday, 15 August
Rain. High 88°, low 68°.
0Machesney Park, Sunday, 16 August
Overcast. High 74°, low 65°.
0.27Machesney Park, Monday, 17 August
Rain. High 72°, low 61°.
0.06Machesney Park, Tuesday, 18 August
Light rain. High 85°, low 68°.
0Machesney Park, Wednesday, 19 August
Overcast. High 82°, low 65°.
0.13Machesney Park, Thursday, 20 August
Light rain. High 85°, low 67°.
0.13Machesney Park, Friday, 21 August
Rain. High 74°, low 61°.
0
Machesney Park, Saturday, 22 August
Clear. High 78°, low 56°.
0Machesney Park, Sunday, 23 August
Light rain. High 80°, low 61°.
0.03Machesney Park, Monday, 24 August
Light rain. High 86°, low 67°.
0.07
Machesney Park, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.16Machesney Park, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Machesney Park, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15
Machesney Park, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Machesney Park, Saturday, 29 August
Climate normal for this date — 60-year average.
0.06Machesney Park, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Machesney Park, Monday, 31 August
Climate normal for this date — 60-year average.
0.09Machesney Park, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.05Machesney Park, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11Machesney Park, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Machesney Park, Friday, 4 September
Climate normal for this date — 60-year average.
0.06Machesney Park, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Machesney Park, Sunday, 6 September
Climate normal for this date — 60-year average.
0.12Machesney Park, 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 Machesney Park, 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 Machesney Park, 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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