Monthly outlook for St. Charles, MO: average high 71.1°, average low 56.6°. That is 6.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 29 October (78.8°), the coolest 9 November (48.3°).
71.1°/56.6°
Average high / low
+6.2°
Above normal
1 / 5
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
72.9°
61.3°
+6.4°
4 November – 13 November
68.1°
56.2°
+6.6°
14 November – 23 November
at normal
53.1°
—
October records over 66 years
91°1 October 2019All-time high
28°24 October 1981All-time low
Climate normals and records are computed from the nearest reference point — Woodson Terrace (10 mi).
Mon, 2675° / 54°0
75 °
St. Charles, Monday, 26 October
Overcast. High 75°, low 54°.
Pressure30.33 inHg
Wind3.7 mph SW
Humidity56%
Visibility6.2 mi
Dew point52°
Tue, 2772° / 51°0
72 °
St. Charles, Tuesday, 27 October
Overcast. High 72°, low 51°.
Pressure30.24 inHg
Wind6.3 mph S
Humidity54%
Visibility6.2 mi
Dew point52°
Wed, 2875° / 56°0
75 °
St. Charles, Wednesday, 28 October
Clear. High 75°, low 56°.
Pressure30.18 inHg
Wind4.6 mph S
Humidity57%
Visibility6.2 mi
Dew point54°
Thu, 2979° / 59°0.04
79 °
St. Charles, Thursday, 29 October
Light rain. High 79°, low 59°.
Pressure30.12 inHg
Wind7.1 mph SW
Humidity55%
Visibility6.2 mi
Dew point57°
Fri, 3074° / 59°0.01
74 °
St. Charles, Friday, 30 October
Light rain. High 74°, low 59°.
Pressure30.15 inHg
Wind6.4 mph E
Humidity72%
Visibility—
Dew point62°
Sat, 3169° / 61°0
69 °
St. Charles, Saturday, 31 October
Overcast. High 69°, low 61°.
Pressure30.18 inHg
Wind6.6 mph SE
Humidity62%
Visibility—
Dew point53°
Sun, 0169° / 62°0.01
69 °
St. Charles, Sunday, 1 November
Light rain. High 69°, low 62°.
Pressure30.12 inHg
Wind5.7 mph N
Humidity62%
Visibility—
Dew point53°
Mon, 0268° / 61°0.01
68 °
St. Charles, Monday, 2 November
Light rain. High 68°, low 61°.
Pressure30.06 inHg
Wind8.2 mph E
Humidity71%
Visibility—
Dew point55°
Tue, 0371° / 58°0
71 °
St. Charles, Tuesday, 3 November
Overcast. High 71°, low 58°.
Pressure30.00 inHg
Wind11.2 mph SE
Humidity53%
Visibility—
Dew point49°
Wed, 0472° / 57°0
72 °
St. Charles, Wednesday, 4 November
Overcast. High 72°, low 57°.
Pressure30.03 inHg
Wind6.8 mph E
Humidity46%
Visibility—
Dew point46°
Thu, 0568° / 60°0.02
68 °
St. Charles, Thursday, 5 November
Light rain. High 68°, low 60°.
Pressure29.97 inHg
Wind5.1 mph NE
Humidity67%
Visibility—
Dew point53°
Fri, 0669° / 54°0
69 °
St. Charles, Friday, 6 November
Overcast. High 69°, low 54°.
Pressure29.91 inHg
Wind5.6 mph E
Humidity53%
Visibility—
Dew point48°
Sat, 0771° / 62°0
71 °
St. Charles, Saturday, 7 November
Overcast. High 71°, low 62°.
Pressure29.83 inHg
Wind12.4 mph SW
Humidity42%
Visibility—
Dew point45°
Sun, 0869° / 54°0
69 °
St. Charles, Sunday, 8 November
Overcast. High 69°, low 54°.
Pressure29.77 inHg
Wind14.1 mph W
Humidity37%
Visibility—
Dew point39°
Mon, 0960° / 48°0
60 °
St. Charles, Monday, 9 November
Clear. High 60°, low 48°.
Pressure29.68 inHg
Wind19.9 mph W
Humidity21%
Visibility—
Dew point18°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1056° / 41°0.13
56 °
St. Charles, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.13 in
Chance of precipitation32%
Record high74° (2012)
Record low19° (2018)
Wed, 1155° / 39°0.11
55 °
St. Charles, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.11 in
Chance of precipitation27%
Record high75° (1964)
Record low22° (2019)
Thu, 1252° / 37°0.09
52 °
St. Charles, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.09 in
Chance of precipitation22%
Record high72° (2010)
Record low11° (2019)
Fri, 1353° / 38°0.06
53 °
St. Charles, Friday, 13 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.06 in
Chance of precipitation20%
Record high78° (1999)
Record low11° (1986)
Sat, 1454° / 39°0.09
54 °
St. Charles, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.09 in
Chance of precipitation30%
Record high77° (1971)
Record low16° (1986)
Sun, 1554° / 39°0.13
54 °
St. Charles, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.13 in
Chance of precipitation32%
Record high76° (1964)
Record low20° (2019)
Mon, 1654° / 38°0.11
54 °
St. Charles, Monday, 16 November
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.11 in
Chance of precipitation23%
Record high72° (2001)
Record low24° (1997)
Tue, 1755° / 39°0.13
55 °
St. Charles, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.13 in
Chance of precipitation27%
Record high76° (2016)
Record low20° (2014)
Wed, 1854° / 39°0.16
54 °
St. Charles, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.16 in
Chance of precipitation35%
Record high71° (1999)
Record low14° (2014)
Thu, 1954° / 39°0.08
54 °
St. Charles, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.08 in
Chance of precipitation35%
Record high72° (1979)
Record low21° (2022)
Fri, 2053° / 39°0.1
53 °
St. Charles, Friday, 20 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.1 in
Chance of precipitation32%
Record high72° (2007)
Record low19° (1984)
Sat, 2151° / 38°0.09
51 °
St. Charles, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.09 in
Chance of precipitation25%
Record high70° (1990)
Record low16° (1964)
Sun, 2251° / 37°0.09
51 °
St. Charles, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.09 in
Chance of precipitation30%
Record high72° (2010)
Record low18° (1964)
Mon, 2351° / 37°0.1
51 °
St. Charles, Monday, 23 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.1 in
Chance of precipitation32%
Record high68° (1966)
Record low18° (1970)
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 St. Charles, MO 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 St. Charles, MO 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.