Weather in Five Island Park, IL
Five Island Park, Sunday, 9 August, 03:08
Clear. Feels like 63°. High 83°, low 62°.
Monthly outlook for Five Island Park, IL: average high 80.9°, average low 65.2°. That is 0.6° above the climate normal for August. Precipitation is expected on 4 days (about 1.8 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 23 August (89.3°), the coolest 14 August (57.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 78.4° | 79.8° | -0.8° |
| 19 August – 28 August | 85° | 79.9° | +2.8° |
| 29 August – 7 September | at normal | 78.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Elgin (5 mi).
0.54
Five Island Park, Monday, 10 August
Rain. High 88°, low 69°.
0.09Five Island Park, Tuesday, 11 August
Light rain. High 80°, low 68°.
0.01Five Island Park, Wednesday, 12 August
Light rain. High 82°, low 67°.
0
Five Island Park, Thursday, 13 August
Overcast. High 74°, low 63°.
0
Five Island Park, Friday, 14 August
Partly cloudy. High 74°, low 57°.
0Five Island Park, Saturday, 15 August
Overcast. High 75°, low 59°.
0.01Five Island Park, Sunday, 16 August
Light rain. High 73°, low 63°.
0.02Five Island Park, Monday, 17 August
Light rain. High 79°, low 63°.
0Five Island Park, Tuesday, 18 August
Overcast. High 75°, low 62°.
0.13Five Island Park, Wednesday, 19 August
Light rain. High 83°, low 66°.
0Five Island Park, Thursday, 20 August
Overcast. High 84°, low 73°.
0
Five Island Park, Friday, 21 August
Clear. High 84°, low 70°.
0Five Island Park, Saturday, 22 August
Clear. High 89°, low 66°.
0.03Five Island Park, Sunday, 23 August
Light rain. High 89°, low 67°.
0.02Five Island Park, Monday, 24 August
Light rain. High 80°, low 66°.
0.08Five Island Park, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.16
Five Island Park, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Five Island Park, Thursday, 27 August
Climate normal for this date — 60-year average.
0.13Five Island Park, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Five Island Park, Saturday, 29 August
Climate normal for this date — 60-year average.
0.11Five Island Park, Sunday, 30 August
Climate normal for this date — 60-year average.
0.09Five Island Park, Monday, 31 August
Climate normal for this date — 60-year average.
0.12Five Island Park, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.04Five Island Park, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Five Island Park, Thursday, 3 September
Climate normal for this date — 60-year average.
0.1Five Island Park, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Five Island Park, Saturday, 5 September
Climate normal for this date — 60-year average.
0.12Five Island Park, Sunday, 6 September
Climate normal for this date — 60-year average.
0.09Five Island 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 Five Island 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 Five Island 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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