Weather in Merrionette Park, IL
Merrionette Park, Sunday, 9 August, 19:33
Clear. Feels like 78°. High 82°, low 63°.
Monthly outlook for Merrionette Park, IL: average high 83°, average low 68.4°. That is 1.8° above the climate normal for August. Precipitation is expected on 8 days (about 3.4 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 15 August (90.5°), the coolest 9 August (63.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 83.2° | 79.9° | +1.8° |
| 19 August – 28 August | 82.8° | 79.9° | +1.6° |
| 29 August – 7 September | at normal | 78.2° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Blue Island (2 mi).
1.3
Merrionette Park, Monday, 10 August
Heavy rain. High 88°, low 71°.
0.29Merrionette Park, Tuesday, 11 August
Rain. High 87°, low 70°.
0Merrionette Park, Wednesday, 12 August
Light rain. High 83°, low 68°.
0.1Merrionette Park, Thursday, 13 August
Light rain. High 79°, low 67°.
0.14Merrionette Park, Friday, 14 August
Light rain. High 77°, low 68°.
0.29Merrionette Park, Saturday, 15 August
Rain. High 90°, low 71°.
0.01Merrionette Park, Sunday, 16 August
Light rain. High 81°, low 69°.
0Merrionette Park, Monday, 17 August
Light rain. High 77°, low 66°.
0Merrionette Park, Tuesday, 18 August
Light rain. High 89°, low 74°.
0
Merrionette Park, Wednesday, 19 August
Overcast. High 87°, low 71°.
0.45Merrionette Park, Thursday, 20 August
Rain. High 86°, low 70°.
0.53Merrionette Park, Friday, 21 August
Heavy rain. High 76°, low 69°.
0Merrionette Park, Saturday, 22 August
Clear. High 78°, low 67°.
0Merrionette Park, Sunday, 23 August
Overcast. High 82°, low 64°.
0.02Merrionette Park, Monday, 24 August
Light rain. High 87°, low 69°.
0.07
Merrionette Park, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.17
Merrionette Park, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.14Merrionette Park, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15Merrionette Park, Friday, 28 August
Climate normal for this date — 60-year average.
0.1Merrionette Park, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Merrionette Park, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Merrionette Park, Monday, 31 August
Climate normal for this date — 60-year average.
0.13Merrionette Park, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.06Merrionette Park, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.07Merrionette Park, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Merrionette Park, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Merrionette Park, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Merrionette Park, Sunday, 6 September
Climate normal for this date — 60-year average.
0.13Merrionette 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 Merrionette 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 Merrionette 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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