Weather in Round Lake, IL
Round Lake, Thursday, 5 November, 01:21
Overcast. Feels like 50°. High 54°, low 49°.
Monthly outlook for Round Lake, IL: average high 53.9°, average low 41.5°. That is 3.7° above the climate normal for November. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 15 November (64°), the coolest 12 November (29.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 5 November – 14 November | 52.9° | 48.2° | +2.6° |
| 15 November – 24 November | 55.5° | 44.4° | +6.1° |
| 25 November – 4 December | at normal | 39.5° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (3 mi).
0Round Lake, Friday, 6 November
Overcast. High 49°, low 39°.
0
Round Lake, Saturday, 7 November
Partly cloudy. High 49°, low 35°.
0
Round Lake, Sunday, 8 November
Clear. High 57°, low 40°.
0
Round Lake, Monday, 9 November
Mostly clear. High 57°, low 38°.
0Round Lake, Tuesday, 10 November
Clear. High 59°, low 43°.
0Round Lake, Wednesday, 11 November
Partly cloudy. High 48°, low 35°.
0Round Lake, Thursday, 12 November
Clear. High 44°, low 30°.
0Round Lake, Friday, 13 November
Overcast. High 53°, low 33°.
0Round Lake, Saturday, 14 November
Clear. High 59°, low 42°.
0Round Lake, Sunday, 15 November
Clear. High 64°, low 49°.
0.02
Round Lake, Monday, 16 November
Light rain. High 60°, low 52°.
0.18Round Lake, Tuesday, 17 November
Light rain. High 55°, low 47°.
0Round Lake, Wednesday, 18 November
Overcast. High 54°, low 44°.
0.3Round Lake, Thursday, 19 November
Rain. High 57°, low 49°.
0Round Lake, Friday, 20 November
Overcast. High 42°, low 38°.
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.
0.09
Round 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.
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.
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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