Weather in Saint Thomas, IL
Saint Thomas, Sunday, 18 October, 14:07
Clear. Feels like 63°. High 64°, low 39°.
Monthly outlook for Saint Thomas, IL: average high 71.3°, average low 52.4°. That is 4.7° above the climate normal for October. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 30 October (86.1°), the coolest 18 October (38.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 71.3° | 63.7° | +4.2° |
| 28 October – 6 November | 71.3° | 59.8° | +6.4° |
| 7 November – 16 November | at normal | 54.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Edwardsville (7 mi).
0
Saint Thomas, Monday, 19 October
Overcast. High 68°, low 43°.
0Saint Thomas, Tuesday, 20 October
Clear. High 68°, low 49°.
0
Saint Thomas, Wednesday, 21 October
Partly cloudy. High 69°, low 50°.
0Saint Thomas, Thursday, 22 October
Clear. High 71°, low 51°.
0Saint Thomas, Friday, 23 October
Clear. High 69°, low 51°.
0Saint Thomas, Saturday, 24 October
Overcast. High 81°, low 57°.
0Saint Thomas, Sunday, 25 October
Overcast. High 73°, low 58°.
0Saint Thomas, Monday, 26 October
Overcast. High 74°, low 57°.
0Saint Thomas, Tuesday, 27 October
Overcast. High 75°, low 58°.
0.22
Saint Thomas, Wednesday, 28 October
Light rain. High 74°, low 62°.
0.17Saint Thomas, Thursday, 29 October
Light rain. High 77°, low 63°.
0.03Saint Thomas, Friday, 30 October
Light rain. High 86°, low 63°.
0.01Saint Thomas, Saturday, 31 October
Light rain. High 72°, low 52°.
0Saint Thomas, Sunday, 1 November
Clear. High 57°, low 44°.
0Saint Thomas, Monday, 2 November
Clear. High 63°, low 43°.
0.11Saint Thomas, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.16Saint Thomas, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.16Saint Thomas, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09
Saint Thomas, Friday, 6 November
Climate normal for this date — 60-year average.
0.08Saint Thomas, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04
Saint Thomas, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1Saint Thomas, Monday, 9 November
Climate normal for this date — 60-year average.
0.13Saint Thomas, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.11Saint Thomas, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.09Saint Thomas, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Saint Thomas, Friday, 13 November
Climate normal for this date — 60-year average.
0.1Saint Thomas, Saturday, 14 November
Climate normal for this date — 60-year average.
0.13Saint Thomas, Sunday, 15 November
Climate normal for this date — 60-year average.
0.11Saint Thomas, Monday, 16 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 Saint Thomas, 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 Saint Thomas, 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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