Weather in Round Lake, IL
Round Lake, Monday, 26 October, 10:52
Overcast. Feels like 58°. High 61°, low 49°.
Monthly outlook for Round Lake, IL: average high 60°, average low 46.6°. That is 4.3° above the climate normal for October. Precipitation is expected on 4 days (about 1.3 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 28 October (69.2°), the coolest 7 November (36.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 26 October – 4 November | 61.7° | 53.5° | +4.6° |
| 5 November – 14 November | 57.1° | 48.2° | +4.9° |
| 15 November – 24 November | at normal | 44.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (3 mi).
0Round Lake, Tuesday, 27 October
Overcast. High 68°, low 50°.
0
Round Lake, Wednesday, 28 October
Mostly clear. High 69°, low 55°.
0.01
Round Lake, Thursday, 29 October
Light rain. High 66°, low 54°.
0Round Lake, Friday, 30 October
Overcast. High 64°, low 46°.
0.14Round Lake, Saturday, 31 October
Light rain. High 62°, low 55°.
0.3Round Lake, Sunday, 1 November
Rain. High 56°, low 52°.
0.01Round Lake, Monday, 2 November
Light rain. High 58°, low 52°.
0.66Round Lake, Tuesday, 3 November
Rain. High 60°, low 45°.
0.19Round Lake, Wednesday, 4 November
Rain. High 51°, low 43°.
0Round Lake, Thursday, 5 November
Overcast. High 61°, low 41°.
0.02Round Lake, Friday, 6 November
Light rain. High 62°, low 41°.
0
Round Lake, Saturday, 7 November
Partly cloudy. High 49°, low 37°.
0Round Lake, Sunday, 8 November
Mostly clear. High 55°, low 39°.
0Round Lake, Monday, 9 November
Overcast. High 58°, low 43°.
0Round Lake, Tuesday, 10 November
Overcast. High 58°, low 45°.
0.08
Round Lake, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Round Lake, Thursday, 12 November
Climate normal for this date — 60-year average.
0.05Round Lake, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Round Lake, Saturday, 14 November
Climate normal for this date — 60-year average.
0.08Round Lake, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Round Lake, Monday, 16 November
Climate normal for this date — 60-year average.
0.1Round Lake, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.1Round Lake, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.07Round Lake, Thursday, 19 November
Climate normal for this date — 60-year average.
0.07Round Lake, Friday, 20 November
Climate normal for this date — 60-year average.
0.1Round Lake, Saturday, 21 November
Climate normal for this date — 60-year average.
0.04Round Lake, Sunday, 22 November
Climate normal for this date — 60-year average.
0.07Round Lake, Monday, 23 November
Climate normal for this date — 60-year average.
0.08Round Lake, Tuesday, 24 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 Round Lake, 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 Round Lake, 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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