Weather in Round Lake, IL
Round Lake, Friday, 30 October, 16:34
Overcast. Feels like 52°. High 55°, low 42°.
Monthly outlook for Round Lake, IL: average high 62.9°, average low 52.1°. That is 7.2° above the climate normal for October. Precipitation is expected on 8 days (about 1.5 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 13 November (67.7°), the coolest 30 October (42°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 30 October – 8 November | 63° | 51.9° | +6.1° |
| 9 November – 18 November | 62.7° | 46.4° | +9.1° |
| 19 November – 28 November | at normal | 42.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (3 mi).
0.06
Round Lake, Saturday, 31 October
Light rain. High 60°, low 52°.
0.07Round Lake, Sunday, 1 November
Rain. High 62°, low 52°.
0.02Round Lake, Monday, 2 November
Light rain. High 58°, low 52°.
0.01Round Lake, Tuesday, 3 November
Light rain. High 66°, low 59°.
0.62Round Lake, Wednesday, 4 November
Light rain. High 63°, low 57°.
0Round Lake, Thursday, 5 November
Overcast. High 66°, low 53°.
0Round Lake, Friday, 6 November
Overcast. High 67°, low 51°.
0Round Lake, Saturday, 7 November
Overcast. High 66°, low 52°.
0Round Lake, Sunday, 8 November
Overcast. High 66°, low 54°.
0Round Lake, Monday, 9 November
Overcast. High 66°, low 54°.
0.28Round Lake, Tuesday, 10 November
Rain. High 61°, low 54°.
0.05Round Lake, Wednesday, 11 November
Light rain. High 64°, low 52°.
0.09Round Lake, Thursday, 12 November
Light rain. High 67°, low 52°.
0.21Round Lake, Friday, 13 November
Light rain. High 68°, low 53°.
0.09Round Lake, Saturday, 14 November
Light rain. High 52°, low 44°.
0.08
Round 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.
0.07
Round 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.
0.09Round Lake, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.12Round Lake, Thursday, 26 November
Climate normal for this date — 60-year average.
0.21Round Lake, Friday, 27 November
Climate normal for this date — 60-year average.
0.12Round Lake, Saturday, 28 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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