Weather in Gretna, IL
Gretna, Friday, 6 November, 17:29
Overcast. Feels like 40°. High 46°, low 34°.
Monthly outlook for Gretna, IL: average high 50.8°, average low 38.1°. That is 1.7° above the climate normal for November. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 17 November (61.1°), the coolest 14 November (29.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 6 November – 15 November | 48.3° | 48.8° | -0.3° |
| 16 November – 25 November | 55° | 45° | +5.5° |
| 26 November – 5 December | at normal | 39.8° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Glendale Heights (2 mi).
0Gretna, Saturday, 7 November
Overcast. High 46°, low 30°.
0
Gretna, Sunday, 8 November
Clear. High 58°, low 38°.
0
Gretna, Monday, 9 November
Mostly clear. High 56°, low 37°.
0Gretna, Tuesday, 10 November
Clear. High 59°, low 45°.
0
Gretna, Wednesday, 11 November
Light rain. High 51°, low 41°.
0.24Gretna, Thursday, 12 November
Light rain. High 45°, low 38°.
0.01
Gretna, Friday, 13 November
Light snow. High 40°, low 33°.
0.01Gretna, Saturday, 14 November
Light snow. High 40°, low 30°.
0Gretna, Sunday, 15 November
Mostly clear. High 42°, low 30°.
0Gretna, Monday, 16 November
Overcast. High 54°, low 38°.
0Gretna, Tuesday, 17 November
Clear. High 61°, low 47°.
0Gretna, Wednesday, 18 November
Overcast. High 60°, low 51°.
0.01Gretna, Thursday, 19 November
Light rain. High 60°, low 41°.
0Gretna, Friday, 20 November
Overcast. High 48°, low 37°.
0Gretna, Saturday, 21 November
Overcast. High 47°, low 39°.
0.04
Gretna, Sunday, 22 November
Climate normal for this date — 60-year average.
0.07Gretna, Monday, 23 November
Climate normal for this date — 60-year average.
0.07Gretna, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.08
Gretna, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.11Gretna, Thursday, 26 November
Climate normal for this date — 60-year average.
0.2Gretna, Friday, 27 November
Climate normal for this date — 60-year average.
0.11Gretna, Saturday, 28 November
Climate normal for this date — 60-year average.
0.06Gretna, Sunday, 29 November
Climate normal for this date — 60-year average.
0.07Gretna, Monday, 30 November
Climate normal for this date — 60-year average.
0.15Gretna, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.06Gretna, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.08Gretna, Thursday, 3 December
Climate normal for this date — 60-year average.
0.06Gretna, Friday, 4 December
Climate normal for this date — 60-year average.
0.08Gretna, Saturday, 5 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 Gretna, 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 Gretna, 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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