Weather in Round Lake, IL
Round Lake, Tuesday, 27 October, 02:58
Mostly clear. Feels like 50°. High 68°, low 51°.
Monthly outlook for Round Lake, IL: average high 53.8°, average low 43.3°. That is 1.2° above the climate normal for October. Precipitation is expected on 7 days (about 3.3 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 28 October (71.4°), the coolest 7 November (27.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 27 October – 5 November | 61.4° | 53.1° | +4.6° |
| 6 November – 15 November | 41.3° | 47.7° | -3.6° |
| 16 November – 25 November | at normal | 44° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (3 mi).
0
Round Lake, Wednesday, 28 October
Clear. High 71°, low 51°.
0.02
Round Lake, Thursday, 29 October
Light rain. High 64°, low 50°.
0
Round Lake, Friday, 30 October
Overcast. High 62°, low 45°.
0.94Round Lake, Saturday, 31 October
Rain. High 62°, low 54°.
0.1Round Lake, Sunday, 1 November
Light rain. High 64°, low 54°.
0Round Lake, Monday, 2 November
Overcast. High 57°, low 53°.
0.56Round Lake, Tuesday, 3 November
Rain. High 59°, low 55°.
0.85Round Lake, Wednesday, 4 November
Heavy rain. High 58°, low 50°.
0.14
Round Lake, Thursday, 5 November
Snow. High 49°, low 34°.
0.12Round Lake, Friday, 6 November
Snow. High 37°, low 30°.
0
Round Lake, Saturday, 7 November
Partly cloudy. High 38°, low 27°.
0.02Round Lake, Sunday, 8 November
Light rain. High 42°, low 27°.
0.52Round Lake, Monday, 9 November
Rain. High 47°, low 42°.
0Round Lake, Tuesday, 10 November
Overcast. High 45°, low 38°.
0Round Lake, Wednesday, 11 November
Partly cloudy. High 40°, low 31°.
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.
0.07
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.
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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