Weather in Sylvan Lake, IL
Sylvan Lake, Friday, 6 November, 23:58
Mostly clear. Feels like 31°. High 47°, low 35°.
Monthly outlook for Sylvan Lake, IL: average high 50.7°, average low 36.9°. That is 2.2° above the climate normal for November. Precipitation is expected on 4 days (about 0.9 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 10 November (58.4°), the coolest 14 November (26.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 6 November – 15 November | 49.3° | 47.7° | +0.9° |
| 16 November – 25 November | 53° | 44° | +5° |
| 26 November – 5 December | at normal | 39.1° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (9 mi).
0
Sylvan Lake, Saturday, 7 November
Overcast. High 47°, low 30°.
0
Sylvan Lake, Sunday, 8 November
Clear. High 58°, low 38°.
0Sylvan Lake, Monday, 9 November
Overcast. High 55°, low 37°.
0
Sylvan Lake, Tuesday, 10 November
Partly cloudy. High 58°, low 44°.
0Sylvan Lake, Wednesday, 11 November
Overcast. High 56°, low 42°.
0.19
Sylvan Lake, Thursday, 12 November
Snow. High 48°, low 33°.
0.13Sylvan Lake, Friday, 13 November
Snow. High 37°, low 28°.
0
Sylvan Lake, Saturday, 14 November
Mostly clear. High 40°, low 26°.
0Sylvan Lake, Sunday, 15 November
Overcast. High 45°, low 29°.
0Sylvan Lake, Monday, 16 November
Clear. High 54°, low 36°.
0Sylvan Lake, Tuesday, 17 November
Overcast. High 56°, low 44°.
0Sylvan Lake, Wednesday, 18 November
Partly cloudy. High 50°, low 43°.
0Sylvan Lake, Thursday, 19 November
Overcast. High 57°, low 47°.
0.48
Sylvan Lake, Friday, 20 November
Rain. High 56°, low 47°.
0.08Sylvan Lake, Saturday, 21 November
Snow. High 46°, low 32°.
0.04Sylvan Lake, Sunday, 22 November
Climate normal for this date — 60-year average.
0.07Sylvan Lake, Monday, 23 November
Climate normal for this date — 60-year average.
0.08Sylvan Lake, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.09
Sylvan Lake, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.12Sylvan Lake, Thursday, 26 November
Climate normal for this date — 60-year average.
0.21Sylvan Lake, Friday, 27 November
Climate normal for this date — 60-year average.
0.12Sylvan Lake, Saturday, 28 November
Climate normal for this date — 60-year average.
0.08Sylvan Lake, Sunday, 29 November
Climate normal for this date — 60-year average.
0.07Sylvan Lake, Monday, 30 November
Climate normal for this date — 60-year average.
0.14Sylvan Lake, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.07Sylvan Lake, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.09Sylvan Lake, Thursday, 3 December
Climate normal for this date — 60-year average.
0.06Sylvan Lake, Friday, 4 December
Climate normal for this date — 60-year average.
0.07Sylvan Lake, Saturday, 5 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 Sylvan 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 Sylvan 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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