Weather in Saint Thomas, IL
Saint Thomas, Sunday, 18 October, 02:35
Clear. Feels like 41°. High 67°, low 41°.
Monthly outlook for Saint Thomas, IL: average high 70.5°, average low 53°. That is 4.3° above the climate normal for October. Precipitation is expected on 3 days (about 1.3 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 24 October (79.5°), the coolest 18 October (41.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 69.8° | 63.7° | +3.4° |
| 28 October – 6 November | 71.6° | 59.8° | +6.6° |
| 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 71°, low 45°.
0
Saint Thomas, Tuesday, 20 October
Partly cloudy. High 68°, low 48°.
0Saint Thomas, Wednesday, 21 October
Partly cloudy. High 70°, low 50°.
0
Saint Thomas, Thursday, 22 October
Clear. High 71°, low 51°.
0Saint Thomas, Friday, 23 October
Clear. High 74°, low 52°.
0Saint Thomas, Saturday, 24 October
Overcast. High 80°, low 59°.
0Saint Thomas, Sunday, 25 October
Overcast. High 65°, low 53°.
0Saint Thomas, Monday, 26 October
Overcast. High 63°, low 45°.
0Saint Thomas, Tuesday, 27 October
Overcast. High 70°, low 50°.
0Saint Thomas, Wednesday, 28 October
Overcast. High 71°, low 57°.
0.08
Saint Thomas, Thursday, 29 October
Light rain. High 75°, low 62°.
0.01Saint Thomas, Friday, 30 October
Light rain. High 71°, low 63°.
1Saint Thomas, Saturday, 31 October
Heavy rain. High 71°, low 59°.
0.17Saint Thomas, Sunday, 1 November
Light rain. High 70°, low 59°.
0Saint Thomas, Monday, 2 November
Clear. High 71°, low 53°.
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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