Weather in Swansea, IL
Swansea, Thursday, 12 November, 10:05
Overcast. Feels like 45°. High 51°, low 40°.
Monthly outlook for Swansea, IL: average high 56.7°, average low 41°. That is 2.1° above the climate normal for November. Precipitation is expected on 4 days (about 2.7 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 21 November (69.1°), the coolest 15 November (31°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 November – 21 November | 56.6° | 54° | +1.4° |
| 22 November – 1 December | 56.8° | 49.6° | +4° |
| 2 December – 11 December | at normal | 45.3° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — St. Louis (15 mi).
0Swansea, Friday, 13 November
Overcast. High 47°, low 39°.
0
Swansea, Saturday, 14 November
Clear. High 46°, low 32°.
0Swansea, Sunday, 15 November
Overcast. High 50°, low 31°.
0Swansea, Monday, 16 November
Clear. High 53°, low 32°.
0Swansea, Tuesday, 17 November
Clear. High 55°, low 34°.
0
Swansea, Wednesday, 18 November
Mostly clear. High 63°, low 39°.
0Swansea, Thursday, 19 November
Overcast. High 68°, low 46°.
0.22
Swansea, Friday, 20 November
Rain. High 62°, low 50°.
0Swansea, Saturday, 21 November
Overcast. High 69°, low 56°.
0.02Swansea, Sunday, 22 November
Light rain. High 68°, low 57°.
1Swansea, Monday, 23 November
Rain. High 62°, low 54°.
0.72Swansea, Tuesday, 24 November
Heavy rain. High 60°, low 39°.
0Swansea, Wednesday, 25 November
Clear. High 43°, low 33°.
0Swansea, Thursday, 26 November
Overcast. High 46°, low 32°.
0.71Swansea, Friday, 27 November
Rain. High 62°, low 43°.
0.1
Swansea, Saturday, 28 November
Climate normal for this date — 60-year average.
0.07Swansea, Sunday, 29 November
Climate normal for this date — 60-year average.
0.17Swansea, Monday, 30 November
Climate normal for this date — 60-year average.
0.11Swansea, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.08Swansea, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.11
Swansea, Thursday, 3 December
Climate normal for this date — 60-year average.
0.08Swansea, Friday, 4 December
Climate normal for this date — 60-year average.
0.09Swansea, Saturday, 5 December
Climate normal for this date — 60-year average.
0.06Swansea, Sunday, 6 December
Climate normal for this date — 60-year average.
0.09Swansea, Monday, 7 December
Climate normal for this date — 60-year average.
0.08Swansea, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.07Swansea, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.12Swansea, Thursday, 10 December
Climate normal for this date — 60-year average.
0.1Swansea, Friday, 11 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 Swansea, 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 Swansea, 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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