Weather in Round Lake, IL
Round Lake, Thursday, 12 November, 03:36
Overcast. Feels like 39°. High 44°, low 37°.
Monthly outlook for Round Lake, IL: average high 46.4°, average low 34.8°. That is 1.3° above the climate normal for November. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 20 November (62°), the coolest 26 November (18.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 November – 21 November | 50.5° | 45.2° | +2.9° |
| 22 November – 1 December | 39.5° | 40.9° | -0.8° |
| 2 December – 11 December | at normal | 35.9° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (3 mi).
0Round Lake, Friday, 13 November
Overcast. High 41°, low 34°.
0
Round Lake, Saturday, 14 November
Clear. High 44°, low 30°.
0Round Lake, Sunday, 15 November
Clear. High 45°, low 31°.
0Round Lake, Monday, 16 November
Clear. High 48°, low 31°.
0Round Lake, Tuesday, 17 November
Clear. High 51°, low 33°.
0
Round Lake, Wednesday, 18 November
Mostly clear. High 55°, low 39°.
0Round Lake, Thursday, 19 November
Overcast. High 58°, low 47°.
0
Round Lake, Friday, 20 November
Partly cloudy. High 62°, low 48°.
0Round Lake, Saturday, 21 November
Overcast. High 57°, low 44°.
0.19
Round Lake, Sunday, 22 November
Rain. High 58°, low 47°.
0Round Lake, Monday, 23 November
Overcast. High 44°, low 36°.
0Round Lake, Tuesday, 24 November
Overcast. High 43°, low 33°.
0Round Lake, Wednesday, 25 November
Partly cloudy. High 30°, low 23°.
0Round Lake, Thursday, 26 November
Clear. High 29°, low 18°.
0.07
Round Lake, Friday, 27 November
Light snow. High 33°, low 25°.
0.12
Round Lake, Saturday, 28 November
Climate normal for this date — 60-year average.
0.08Round Lake, Sunday, 29 November
Climate normal for this date — 60-year average.
0.07Round Lake, Monday, 30 November
Climate normal for this date — 60-year average.
0.14Round Lake, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.07Round Lake, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.09Round Lake, Thursday, 3 December
Climate normal for this date — 60-year average.
0.06Round Lake, Friday, 4 December
Climate normal for this date — 60-year average.
0.07Round Lake, Saturday, 5 December
Climate normal for this date — 60-year average.
0.06Round Lake, Sunday, 6 December
Climate normal for this date — 60-year average.
0.11Round Lake, Monday, 7 December
Climate normal for this date — 60-year average.
0.09Round Lake, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.09Round Lake, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.09Round Lake, Thursday, 10 December
Climate normal for this date — 60-year average.
0.11Round Lake, Friday, 11 December
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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