Weather in Crystal Lake, IL
Crystal Lake, Saturday, 14 November, 16:28
Clear. Feels like 42°. High 44°, low 29°.
Monthly outlook for Crystal Lake, IL: average high 48.7°, average low 37.2°. That is 2.6° above the climate normal for November. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 19 November (58°), the coolest 23 November (27.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 14 November – 23 November | 50.3° | 45.6° | +2.6° |
| 24 November – 3 December | 46° | 40.2° | +3.2° |
| 4 December – 13 December | at normal | 35.4° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Elgin (13 mi).
0Crystal Lake, Sunday, 15 November
Clear. High 49°, low 30°.
0Crystal Lake, Monday, 16 November
Clear. High 49°, low 30°.
0Crystal Lake, Tuesday, 17 November
Clear. High 53°, low 34°.
0
Crystal Lake, Wednesday, 18 November
Overcast. High 54°, low 38°.
0.04
Crystal Lake, Thursday, 19 November
Light rain. High 58°, low 46°.
0Crystal Lake, Friday, 20 November
Overcast. High 56°, low 46°.
0.07Crystal Lake, Saturday, 21 November
Light rain. High 56°, low 48°.
0Crystal Lake, Sunday, 22 November
Overcast. High 45°, low 35°.
0
Crystal Lake, Monday, 23 November
Mostly clear. High 39°, low 28°.
0Crystal Lake, Tuesday, 24 November
Overcast. High 39°, low 29°.
0.16
Crystal Lake, Wednesday, 25 November
Snow. High 39°, low 34°.
0Crystal Lake, Thursday, 26 November
Overcast. High 46°, low 38°.
0Crystal Lake, Friday, 27 November
Overcast. High 48°, low 39°.
0.58Crystal Lake, Saturday, 28 November
Rain. High 47°, low 43°.
0.02Crystal Lake, Sunday, 29 November
Light rain. High 57°, low 47°.
0.07
Crystal Lake, Monday, 30 November
Climate normal for this date — 60-year average.
0.14
Crystal 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.
0.09Crystal Lake, Thursday, 10 December
Climate normal for this date — 60-year average.
0.1Crystal Lake, Friday, 11 December
Climate normal for this date — 60-year average.
0.08Crystal Lake, Saturday, 12 December
Climate normal for this date — 60-year average.
0.06Crystal Lake, Sunday, 13 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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