Weather in Round Lake, IL
Round Lake, Saturday, 24 October, 22:36
Partly cloudy. Feels like 55°. High 70°, low 48°.
Monthly outlook for Round Lake, IL: average high 64°, average low 50.1°. That is 6.1° above the climate normal for October. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 25 October (71.9°), the coolest 6 November (41.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 24 October – 2 November | 67.8° | 54.4° | +7.4° |
| 3 November – 12 November | 57.8° | 49.4° | +4.7° |
| 13 November – 22 November | at normal | 45° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (3 mi).
0
Round Lake, Sunday, 25 October
Partly cloudy. High 72°, low 49°.
0
Round Lake, Monday, 26 October
Overcast. High 67°, low 47°.
0.01
Round Lake, Tuesday, 27 October
Light rain. High 67°, low 50°.
0.02Round Lake, Wednesday, 28 October
Light rain. High 70°, low 54°.
0.04Round Lake, Thursday, 29 October
Light rain. High 63°, low 54°.
0Round Lake, Friday, 30 October
Overcast. High 69°, low 50°.
0.02Round Lake, Saturday, 31 October
Light rain. High 67°, low 59°.
0.79Round Lake, Sunday, 1 November
Rain. High 69°, low 61°.
0
Round Lake, Monday, 2 November
Clear. High 66°, low 52°.
0Round Lake, Tuesday, 3 November
Overcast. High 62°, low 50°.
0.09Round Lake, Wednesday, 4 November
Light rain. High 54°, low 50°.
0Round Lake, Thursday, 5 November
Overcast. High 54°, low 42°.
0Round Lake, Friday, 6 November
Overcast. High 57°, low 41°.
0Round Lake, Saturday, 7 November
Overcast. High 67°, low 52°.
0Round Lake, Sunday, 8 November
Overcast. High 53°, low 43°.
0.11
Round Lake, Monday, 9 November
Climate normal for this date — 60-year average.
0.11Round Lake, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.08Round 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.
0.05
Round 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.
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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