Weather in Sylvan Lake, IL
Sylvan Lake, Saturday, 31 October, 18:07
Clear. Feels like 56°. High 61°, low 51°.
Monthly outlook for Sylvan Lake, IL: average high 54.5°, average low 45.8°. That is 2.8° above the climate normal for October. Precipitation is expected on 6 days (about 1.3 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 3 November (70.4°), the coolest 15 November (32.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 31 October – 9 November | 59.2° | 51.4° | +4.3° |
| 10 November – 19 November | 46.6° | 46° | +0.4° |
| 20 November – 29 November | at normal | 41.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Round Lake Beach (9 mi).
0
Sylvan Lake, Sunday, 1 November
Mostly clear. High 68°, low 53°.
0.12
Sylvan Lake, Monday, 2 November
Light rain. High 59°, low 54°.
0.44Sylvan Lake, Tuesday, 3 November
Rain. High 70°, low 59°.
0.25Sylvan Lake, Wednesday, 4 November
Light rain. High 64°, low 56°.
0.03Sylvan Lake, Thursday, 5 November
Light rain. High 57°, low 54°.
0.04Sylvan Lake, Friday, 6 November
Light rain. High 52°, low 49°.
0
Sylvan Lake, Saturday, 7 November
Overcast. High 55°, low 48°.
0Sylvan Lake, Sunday, 8 November
Overcast. High 55°, low 45°.
0Sylvan Lake, Monday, 9 November
Overcast. High 51°, low 44°.
0
Sylvan Lake, Tuesday, 10 November
Clear. High 56°, low 39°.
0Sylvan Lake, Wednesday, 11 November
Clear. High 48°, low 36°.
0Sylvan Lake, Thursday, 12 November
Mostly clear. High 47°, low 35°.
0.38Sylvan Lake, Friday, 13 November
Rain. High 42°, low 39°.
0.05Sylvan Lake, Saturday, 14 November
Light rain. High 43°, low 38°.
0Sylvan Lake, Sunday, 15 November
Clear. High 44°, low 32°.
0.05Sylvan Lake, Monday, 16 November
Climate normal for this date — 60-year average.
0.1
Sylvan Lake, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.1Sylvan Lake, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.07Sylvan Lake, Thursday, 19 November
Climate normal for this date — 60-year average.
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.
0.04Sylvan 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.
0.09Sylvan 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.
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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