Weather in Blue Island, IL
Blue Island, Saturday, 31 October, 19:32
Overcast. Feels like 56°. High 62°, low 52°.
Monthly outlook for Blue Island, IL: average high 56.3°, average low 49.1°. That is 2.9° above the climate normal for October. Precipitation is expected on 5 days (about 1.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 3 November (72.5°), the coolest 12 November (38.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 31 October – 9 November | 60.7° | 53.1° | +4.2° |
| 10 November – 19 November | 49° | 47.7° | +0.7° |
| 20 November – 29 November | at normal | 43.6° | — |
October records over 66 years
0Blue Island, Sunday, 1 November
Overcast. High 68°, low 55°.
0.17
Blue Island, Monday, 2 November
Rain. High 61°, low 55°.
0Blue Island, Tuesday, 3 November
Overcast. High 72°, low 62°.
0.58Blue Island, Wednesday, 4 November
Rain. High 67°, low 59°.
0.02Blue Island, Thursday, 5 November
Light rain. High 59°, low 55°.
0.16Blue Island, Friday, 6 November
Light rain. High 54°, low 51°.
0.02Blue Island, Saturday, 7 November
Light rain. High 54°, low 51°.
0Blue Island, Sunday, 8 November
Overcast. High 56°, low 49°.
0Blue Island, Monday, 9 November
Overcast. High 54°, low 49°.
0
Blue Island, Tuesday, 10 November
Clear. High 58°, low 44°.
0Blue Island, Wednesday, 11 November
Overcast. High 51°, low 43°.
0Blue Island, Thursday, 12 November
Clear. High 49°, low 38°.
0.31Blue Island, Friday, 13 November
Rain. High 44°, low 40°.
0.09Blue Island, Saturday, 14 November
Light rain. High 46°, low 43°.
0
Blue Island, Sunday, 15 November
Partly cloudy. High 47°, low 39°.
0.05Blue Island, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Blue Island, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.15Blue Island, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.08
Blue Island, Thursday, 19 November
Climate normal for this date — 60-year average.
0.1Blue Island, Friday, 20 November
Climate normal for this date — 60-year average.
0.11Blue Island, Saturday, 21 November
Climate normal for this date — 60-year average.
0.05
Blue Island, Sunday, 22 November
Climate normal for this date — 60-year average.
0.09Blue Island, Monday, 23 November
Climate normal for this date — 60-year average.
0.08Blue Island, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.08Blue Island, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.13Blue Island, Thursday, 26 November
Climate normal for this date — 60-year average.
0.22Blue Island, Friday, 27 November
Climate normal for this date — 60-year average.
0.14Blue Island, Saturday, 28 November
Climate normal for this date — 60-year average.
0.08Blue Island, Sunday, 29 November
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 Blue Island, 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 Blue Island, 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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