Monthly outlook for Swansea, IL: average high 59.6°, average low 41.3°. That is 4.4° above the climate normal for November. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 19 November (68.6°), the coolest 15 November (27.4°).
59.6°/41.3°
Average high / low
+4.4°
Above normal
2 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 November – 24 November
58.5°
53.3°
+2.9°
25 November – 4 December
61.4°
48.3°
+7.3°
5 December – 14 December
at normal
44.4°
—
November records over 66 years
80.8°8 November 2023All-time high
6.4°8 November 1991All-time low
Climate normals and records are computed from the nearest reference point — St. Louis (15 mi).
Mon, 1657° / 28°0
57 °
Swansea, Monday, 16 November
Clear. High 57°, low 28°.
Pressure30.53 inHg
Wind2.3 mph S
Humidity49%
Visibility6.2 mi
Dew point34°
Tue, 1757° / 35°0
57 °
Swansea, Tuesday, 17 November
Clear. High 57°, low 35°.
Pressure30.50 inHg
Wind5.8 mph S
Humidity53%
Visibility6.2 mi
Dew point38°
Wed, 1861° / 40°0
61 °
Swansea, Wednesday, 18 November
Overcast. High 61°, low 40°.
Pressure30.36 inHg
Wind9.2 mph S
Humidity48%
Visibility6.2 mi
Dew point39°
Thu, 1969° / 46°0
69 °
Swansea, Thursday, 19 November
Clear. High 69°, low 46°.
Pressure30.30 inHg
Wind8.9 mph S
Humidity51%
Visibility—
Dew point45°
Fri, 2067° / 51°0
67 °
Swansea, Friday, 20 November
Overcast. High 67°, low 51°.
Pressure30.27 inHg
Wind8.6 mph S
Humidity61%
Visibility—
Dew point50°
Sat, 2167° / 47°0.09
67 °
Swansea, Saturday, 21 November
Light rain. High 67°, low 47°.
Pressure30.03 inHg
Wind18.5 mph SW
Humidity37%
Visibility—
Dew point37°
Sun, 2255° / 43°0
55 °
Swansea, Sunday, 22 November
Mostly clear. High 55°, low 43°.
Pressure30.30 inHg
Wind12.4 mph NW
Humidity46%
Visibility—
Dew point33°
Mon, 2349° / 33°0
49 °
Swansea, Monday, 23 November
Partly cloudy. High 49°, low 33°.
Pressure30.47 inHg
Wind9 mph NE
Humidity40%
Visibility—
Dew point22°
Tue, 2451° / 31°0
51 °
Swansea, Tuesday, 24 November
Overcast. High 51°, low 31°.
Pressure30.47 inHg
Wind7.2 mph E
Humidity34%
Visibility—
Dew point18°
Wed, 2559° / 34°0
59 °
Swansea, Wednesday, 25 November
Clear. High 59°, low 34°.
Pressure30.39 inHg
Wind7.5 mph SE
Humidity42%
Visibility—
Dew point29°
Thu, 2663° / 41°0
63 °
Swansea, Thursday, 26 November
Clear. High 63°, low 41°.
Pressure30.27 inHg
Wind9.8 mph S
Humidity31%
Visibility—
Dew point27°
Fri, 2762° / 45°0
62 °
Swansea, Friday, 27 November
Overcast. High 62°, low 45°.
Pressure30.27 inHg
Wind6.8 mph E
Humidity40%
Visibility—
Dew point33°
Sat, 2863° / 49°0
63 °
Swansea, Saturday, 28 November
Overcast. High 63°, low 49°.
Pressure30.36 inHg
Wind6.6 mph NE
Humidity31%
Visibility—
Dew point26°
Sun, 2965° / 54°0
65 °
Swansea, Sunday, 29 November
Overcast. High 65°, low 54°.
Pressure30.24 inHg
Wind9.5 mph E
Humidity61%
Visibility—
Dew point46°
Mon, 3058° / 54°0.51
58 °
Swansea, Monday, 30 November
Rain. High 58°, low 54°.
Pressure30.03 inHg
Wind10.6 mph SE
Humidity95%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0147° / 33°0.11
47 °
Swansea, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.11 in
Chance of precipitation27%
Record high70° (1970)
Record low16° (1985)
Wed, 0248° / 33°0.08
48 °
Swansea, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.08 in
Chance of precipitation20%
Record high72° (2012)
Record low11° (1985)
Thu, 0347° / 33°0.11
47 °
Swansea, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.11 in
Chance of precipitation33%
Record high73° (1998)
Record low13° (2006)
Fri, 0446° / 32°0.08
46 °
Swansea, Friday, 4 December
Climate normal for this date — 60-year average.
Average high46°
Average low32°
Average precipitation0.08 in
Chance of precipitation27%
Record high71° (1998)
Record low4° (2006)
Sat, 0547° / 31°0.09
47 °
Swansea, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.09 in
Chance of precipitation27%
Record high72° (1998)
Record low11° (2025)
Sun, 0644° / 31°0.06
44 °
Swansea, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.06 in
Chance of precipitation37%
Record high71° (1998)
Record low6° (1977)
Mon, 0744° / 30°0.09
44 °
Swansea, Monday, 7 December
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.09 in
Chance of precipitation23%
Record high68° (1980)
Record low-3° (1977)
Tue, 0844° / 31°0.08
44 °
Swansea, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.08 in
Chance of precipitation33%
Record high68° (1991)
Record low13° (2006)
Wed, 0944° / 30°0.07
44 °
Swansea, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.07 in
Chance of precipitation30%
Record high62° (1965)
Record low4° (1977)
Thu, 1044° / 29°0.12
44 °
Swansea, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.12 in
Chance of precipitation23%
Record high66° (1965)
Record low-4° (1977)
Fri, 1144° / 29°0.1
44 °
Swansea, Friday, 11 December
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.1 in
Chance of precipitation28%
Record high65° (1979)
Record low7° (1977)
Sat, 1244° / 31°0.07
44 °
Swansea, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.07 in
Chance of precipitation25%
Record high71° (2015)
Record low2° (1962)
Sun, 1344° / 30°0.09
44 °
Swansea, Sunday, 13 December
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.09 in
Chance of precipitation33%
Record high65° (1975)
Record low-1° (1961)
Mon, 1444° / 30°0.13
44 °
Swansea, Monday, 14 December
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.13 in
Chance of precipitation37%
Record high66° (1975)
Record low1° (1963)
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.