Weather in Sylvan Lake, IL
Sylvan Lake, Tuesday, 10 November, 20:58
Mostly clear. Feels like 46°. High 64°, low 41°.
Monthly outlook for Sylvan Lake, IL: average high 45.2°, average low 33.6°. That is 0.2° above the climate normal for November. Precipitation is expected on 4 days (about 3.0 inches), against a normal of 5 days and 1.2 inches. The warmest day looks like 10 November (63.9°), the coolest 24 November (17.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 November – 19 November | 49.2° | 46° | +1.8° |
| 20 November – 29 November | 38.6° | 41.9° | -1.8° |
| 30 November – 9 December | at normal | 36.9° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (9 mi).
0.07
Sylvan Lake, Wednesday, 11 November
Light rain. High 57°, low 41°.
0
Sylvan Lake, Thursday, 12 November
Overcast. High 47°, low 36°.
0
Sylvan Lake, Friday, 13 November
Partly cloudy. High 41°, low 33°.
0
Sylvan Lake, Saturday, 14 November
Clear. High 43°, low 30°.
0Sylvan Lake, Sunday, 15 November
Overcast. High 46°, low 32°.
0Sylvan Lake, Monday, 16 November
Partly cloudy. High 48°, low 30°.
0Sylvan Lake, Tuesday, 17 November
Clear. High 49°, low 36°.
0Sylvan Lake, Wednesday, 18 November
Clear. High 50°, low 36°.
0.01Sylvan Lake, Thursday, 19 November
Light rain. High 47°, low 41°.
1.2Sylvan Lake, Friday, 20 November
Rain. High 49°, low 47°.
1.59Sylvan Lake, Saturday, 21 November
Rain. High 48°, low 40°.
0.03Sylvan Lake, Sunday, 22 November
Light rain. High 37°, low 28°.
0.13
Sylvan Lake, Monday, 23 November
Light snow. High 30°, low 22°.
0
Sylvan Lake, Tuesday, 24 November
Mostly clear. High 30°, low 18°.
0Sylvan Lake, Wednesday, 25 November
Overcast. High 38°, low 27°.
0.12
Sylvan 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.
0.06Sylvan Lake, Sunday, 6 December
Climate normal for this date — 60-year average.
0.11Sylvan Lake, Monday, 7 December
Climate normal for this date — 60-year average.
0.09Sylvan Lake, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.09Sylvan Lake, Wednesday, 9 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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