Weather in Sylvan Lake, IL
Sylvan Lake, Wednesday, 4 November, 09:27
Overcast. Feels like 62°. High 65°, low 55°.
Monthly outlook for Sylvan Lake, IL: average high 55.8°, average low 42.4°. That is 4.5° 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 4 November (64.6°), the coolest 7 November (33.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 4 November – 13 November | 53.7° | 48.7° | +2.7° |
| 14 November – 23 November | 59.4° | 44.8° | +8.1° |
| 24 November – 3 December | at normal | 39.9° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (9 mi).
0.03
Sylvan Lake, Thursday, 5 November
Light rain. High 54°, low 46°.
0Sylvan Lake, Friday, 6 November
Overcast. High 48°, low 39°.
0Sylvan Lake, Saturday, 7 November
Overcast. High 48°, low 34°.
0
Sylvan Lake, Sunday, 8 November
Partly cloudy. High 58°, low 38°.
0Sylvan Lake, Monday, 9 November
Overcast. High 57°, low 38°.
0
Sylvan Lake, Tuesday, 10 November
Clear. High 57°, low 44°.
0Sylvan Lake, Wednesday, 11 November
Overcast. High 51°, low 39°.
0Sylvan Lake, Thursday, 12 November
Overcast. High 48°, low 39°.
0Sylvan Lake, Friday, 13 November
Partly cloudy. High 53°, low 36°.
0Sylvan Lake, Saturday, 14 November
Clear. High 59°, low 40°.
0Sylvan Lake, Sunday, 15 November
Overcast. High 62°, low 47°.
0Sylvan Lake, Monday, 16 November
Clear. High 59°, low 45°.
0Sylvan Lake, Tuesday, 17 November
Clear. High 61°, low 48°.
0.01Sylvan Lake, Wednesday, 18 November
Light rain. High 60°, low 49°.
0.2Sylvan Lake, Thursday, 19 November
Light rain. High 56°, low 41°.
0.07
Sylvan Lake, Friday, 20 November
Climate normal for this date — 60-year average.
0.1Sylvan Lake, Saturday, 21 November
Climate normal for this date — 60-year average.
0.04
Sylvan 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.
0.09Sylvan 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.
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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