Monthly outlook for Saint Thomas, IL: average high 61°, average low 48.1°. That is 3.1° above the climate normal for November. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 10 November (70.6°), the coolest 14 November (38.2°).
61°/48.1°
Average high / low
+3.1°
Above normal
3 / 4
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
3 November – 12 November
63°
56.5°
+3.6°
13 November – 22 November
57.6°
52.9°
+2.6°
23 November – 2 December
at normal
48.3°
—
November records over 66 years
79.9°8 November 2023All-time high
3.7°8 November 1991All-time low
Climate normals and records are computed from the nearest reference point — Edwardsville (7 mi).
Wed, 0461° / 55°0.01
61 °
Saint Thomas, Wednesday, 4 November
Light rain. High 61°, low 55°.
Pressure29.80 inHg
Wind13.2 mph W
Humidity65%
Visibility6.2 mi
Dew point49°
Thu, 0562° / 50°0.01
62 °
Saint Thomas, Thursday, 5 November
Light rain. High 62°, low 50°.
Pressure29.88 inHg
Wind9 mph W
Humidity59%
Visibility6.2 mi
Dew point46°
Fri, 0655° / 51°0.01
55 °
Saint Thomas, Friday, 6 November
Light rain. High 55°, low 51°.
Pressure30.06 inHg
Wind8.4 mph N
Humidity69%
Visibility6.2 mi
Dew point45°
Sat, 0755° / 45°0
55 °
Saint Thomas, Saturday, 7 November
Partly cloudy. High 55°, low 45°.
Pressure30.21 inHg
Wind6.8 mph NW
Humidity53%
Visibility—
Dew point36°
Sun, 0865° / 44°0
65 °
Saint Thomas, Sunday, 8 November
Clear. High 65°, low 44°.
Pressure30.18 inHg
Wind5.8 mph SW
Humidity62%
Visibility—
Dew point46°
Mon, 0969° / 50°0
69 °
Saint Thomas, Monday, 9 November
Clear. High 69°, low 50°.
Pressure30.06 inHg
Wind6.1 mph SW
Humidity40%
Visibility—
Dew point38°
Tue, 1071° / 55°0
71 °
Saint Thomas, Tuesday, 10 November
Overcast. High 71°, low 55°.
Pressure30.09 inHg
Wind7.1 mph SW
Humidity43%
Visibility—
Dew point43°
Wed, 1162° / 57°0.17
62 °
Saint Thomas, Wednesday, 11 November
Rain. High 62°, low 57°.
Pressure29.97 inHg
Wind8.1 mph W
Humidity85%
Visibility—
Dew point56°
Thu, 1260° / 51°0
60 °
Saint Thomas, Thursday, 12 November
Overcast. High 60°, low 51°.
Pressure30.00 inHg
Wind10.5 mph NE
Humidity54%
Visibility—
Dew point42°
Fri, 1353° / 42°0
53 °
Saint Thomas, Friday, 13 November
Mostly clear. High 53°, low 42°.
Pressure30.18 inHg
Wind9.3 mph NE
Humidity41%
Visibility—
Dew point28°
Sat, 1452° / 38°0
52 °
Saint Thomas, Saturday, 14 November
Clear. High 52°, low 38°.
Pressure30.33 inHg
Wind7.8 mph N
Humidity45%
Visibility—
Dew point28°
Sun, 1555° / 38°0
55 °
Saint Thomas, Sunday, 15 November
Clear. High 55°, low 38°.
Pressure30.36 inHg
Wind5.6 mph NE
Humidity36%
Visibility—
Dew point25°
Mon, 1659° / 41°0
59 °
Saint Thomas, Monday, 16 November
Clear. High 59°, low 41°.
Pressure30.18 inHg
Wind10.1 mph S
Humidity34%
Visibility—
Dew point26°
Tue, 1759° / 44°0.09
59 °
Saint Thomas, Tuesday, 17 November
Light rain. High 59°, low 44°.
Pressure29.91 inHg
Wind16.4 mph S
Humidity70%
Visibility—
Dew point42°
Wed, 1868° / 48°0
68 °
Saint Thomas, Wednesday, 18 November
Clear. High 68°, low 48°.
Pressure29.94 inHg
Wind12 mph SW
Humidity30%
Visibility—
Dew point31°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 1953° / 39°0.07
53 °
Saint Thomas, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.07 in
Chance of precipitation32%
Record high72° (1985)
Record low21° (2022)
Fri, 2052° / 38°0.1
52 °
Saint Thomas, Friday, 20 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.1 in
Chance of precipitation33%
Record high71° (2007)
Record low18° (1984)
Sat, 2151° / 38°0.1
51 °
Saint Thomas, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.1 in
Chance of precipitation25%
Record high71° (1990)
Record low17° (1964)
Sun, 2251° / 37°0.09
51 °
Saint Thomas, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.09 in
Chance of precipitation30%
Record high71° (2010)
Record low17° (1964)
Mon, 2351° / 36°0.1
51 °
Saint Thomas, Monday, 23 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.1 in
Chance of precipitation27%
Record high66° (1966)
Record low18° (1970)
Tue, 2450° / 35°0.15
50 °
Saint Thomas, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.15 in
Chance of precipitation28%
Record high69° (1966)
Record low16° (1970)
Wed, 2550° / 36°0.17
50 °
Saint Thomas, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.17 in
Chance of precipitation35%
Record high68° (1990)
Record low20° (1977)
Thu, 2650° / 37°0.17
50 °
Saint Thomas, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.17 in
Chance of precipitation42%
Record high74° (1965)
Record low13° (1977)
Fri, 2749° / 36°0.21
49 °
Saint Thomas, Friday, 27 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.21 in
Chance of precipitation45%
Record high70° (1989)
Record low15° (1993)
Sat, 2846° / 33°0.11
46 °
Saint Thomas, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.11 in
Chance of precipitation27%
Record high69° (1998)
Record low9° (1977)
Sun, 2947° / 34°0.08
47 °
Saint Thomas, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.08 in
Chance of precipitation25%
Record high69° (1998)
Record low15° (1976)
Mon, 3048° / 34°0.18
48 °
Saint Thomas, Monday, 30 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.18 in
Chance of precipitation33%
Record high67° (2014)
Record low11° (1964)
Tue, 0146° / 33°0.12
46 °
Saint Thomas, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.12 in
Chance of precipitation30%
Record high69° (1970)
Record low15° (1985)
Wed, 0247° / 33°0.09
47 °
Saint Thomas, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.09 in
Chance of precipitation23%
Record high71° (2012)
Record low11° (1985)
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.