Weather in Crystal Lake, IL
Crystal Lake, Tuesday, 10 November, 10:14
Clear. Feels like 55°. High 61°, low 42°.
Monthly outlook for Crystal Lake, IL: average high 46.7°, average low 35.3°. That is 0.7° above the climate normal for November. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 10 November (61.1°), the coolest 25 November (23.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 November – 19 November | 48.4° | 46.7° | +0.9° |
| 20 November – 29 November | 43.9° | 42.4° | +0.9° |
| 30 November – 9 December | at normal | 37° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Elgin (13 mi).
0.01
Crystal Lake, Wednesday, 11 November
Light rain. High 58°, low 40°.
0.02Crystal Lake, Thursday, 12 November
Light rain. High 42°, low 34°.
0
Crystal Lake, Friday, 13 November
Partly cloudy. High 41°, low 31°.
0Crystal Lake, Saturday, 14 November
Clear. High 42°, low 27°.
0
Crystal Lake, Sunday, 15 November
Overcast. High 46°, low 31°.
0Crystal Lake, Monday, 16 November
Clear. High 47°, low 33°.
0
Crystal Lake, Tuesday, 17 November
Mostly clear. High 47°, low 33°.
0Crystal Lake, Wednesday, 18 November
Clear. High 49°, low 33°.
0Crystal Lake, Thursday, 19 November
Overcast. High 50°, low 35°.
0Crystal Lake, Friday, 20 November
Overcast. High 48°, low 43°.
0.11Crystal Lake, Saturday, 21 November
Light rain. High 50°, low 46°.
0.43Crystal Lake, Sunday, 22 November
Rain. High 51°, low 43°.
0Crystal Lake, Monday, 23 November
Light rain. High 43°, low 37°.
0.01
Crystal Lake, Tuesday, 24 November
Light snow. High 39°, low 30°.
0Crystal Lake, Wednesday, 25 November
Partly cloudy. High 32°, low 24°.
0.11
Crystal Lake, Thursday, 26 November
Climate normal for this date — 60-year average.
0.2Crystal Lake, Friday, 27 November
Climate normal for this date — 60-year average.
0.12Crystal Lake, Saturday, 28 November
Climate normal for this date — 60-year average.
0.07Crystal Lake, Sunday, 29 November
Climate normal for this date — 60-year average.
0.07Crystal Lake, Monday, 30 November
Climate normal for this date — 60-year average.
0.14Crystal Lake, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.06Crystal Lake, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.09Crystal Lake, Thursday, 3 December
Climate normal for this date — 60-year average.
0.06Crystal Lake, Friday, 4 December
Climate normal for this date — 60-year average.
0.08Crystal Lake, Saturday, 5 December
Climate normal for this date — 60-year average.
0.06Crystal Lake, Sunday, 6 December
Climate normal for this date — 60-year average.
0.12Crystal Lake, Monday, 7 December
Climate normal for this date — 60-year average.
0.07Crystal Lake, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.09Crystal 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 Crystal 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 Crystal 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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