Monthly outlook for Mount Vernon, MO: average high 68.5°, average low 52.4°. That is 2.6° above the climate normal for October. Precipitation is expected on 5 days (about 1.7 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 26 October (76.3°), the coolest 1 November (40.5°).
68.5°/52.4°
Average high / low
+2.6°
Above normal
5 / 5
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
69.7°
65.1°
+2.6°
29 October – 7 November
66.3°
60.7°
+3.1°
8 November – 17 November
at normal
57°
—
October records over 66 years
89.6°3 October 2006All-time high
25.2°31 October 1993All-time low
Climate normals and records are computed from the nearest reference point — Miller (8 mi).
Tue, 2070° / 47°0
70 °
Mount Vernon, Tuesday, 20 October
Overcast. High 70°, low 47°.
Pressure30.33 inHg
Wind6.5 mph S
Humidity52%
Visibility6.2 mi
Dew point48°
Wed, 2168° / 51°0.01
68 °
Mount Vernon, Wednesday, 21 October
Light rain. High 68°, low 51°.
Pressure30.30 inHg
Wind0.7 mph S
Humidity48%
Visibility6.2 mi
Dew point47°
Thu, 2272° / 50°0
72 °
Mount Vernon, Thursday, 22 October
Clear. High 72°, low 50°.
Pressure30.27 inHg
Wind4.7 mph E
Humidity51%
Visibility6.2 mi
Dew point49°
Fri, 2371° / 54°0
71 °
Mount Vernon, Friday, 23 October
Partly cloudy. High 71°, low 54°.
Pressure30.24 inHg
Wind10.5 mph SE
Humidity54%
Visibility—
Dew point50°
Sat, 2476° / 53°0
76 °
Mount Vernon, Saturday, 24 October
Overcast. High 76°, low 53°.
Pressure30.24 inHg
Wind11.9 mph SE
Humidity40%
Visibility—
Dew point45°
Sun, 2571° / 54°0
71 °
Mount Vernon, Sunday, 25 October
Overcast. High 71°, low 54°.
Pressure30.30 inHg
Wind11.7 mph NE
Humidity55%
Visibility—
Dew point49°
Mon, 2676° / 60°0
76 °
Mount Vernon, Monday, 26 October
Overcast. High 76°, low 60°.
Pressure30.12 inHg
Wind14.9 mph S
Humidity31%
Visibility—
Dew point40°
Tue, 2764° / 54°0.57
64 °
Mount Vernon, Tuesday, 27 October
Rain. High 64°, low 54°.
Pressure30.12 inHg
Wind11.5 mph SW
Humidity96%
Visibility—
Dew point53°
Wed, 2859° / 55°0.24
59 °
Mount Vernon, Wednesday, 28 October
Light rain. High 59°, low 55°.
Pressure30.06 inHg
Wind10 mph S
Humidity90%
Visibility—
Dew point55°
Thu, 2973° / 59°0.02
73 °
Mount Vernon, Thursday, 29 October
Light rain. High 73°, low 59°.
Pressure29.88 inHg
Wind16.6 mph S
Humidity66%
Visibility—
Dew point59°
Fri, 3072° / 62°0.04
72 °
Mount Vernon, Friday, 30 October
Light rain. High 72°, low 62°.
Pressure29.88 inHg
Wind21.2 mph S
Humidity73%
Visibility—
Dew point62°
Sat, 3171° / 58°0.45
71 °
Mount Vernon, Saturday, 31 October
Rain. High 71°, low 58°.
Pressure29.88 inHg
Wind17.8 mph SW
Humidity88%
Visibility—
Dew point63°
Sun, 0160° / 40°0
60 °
Mount Vernon, Sunday, 1 November
Mostly clear. High 60°, low 40°.
Pressure30.06 inHg
Wind22.2 mph W
Humidity47%
Visibility—
Dew point35°
Mon, 0264° / 46°0
64 °
Mount Vernon, Monday, 2 November
Overcast. High 64°, low 46°.
Pressure30.03 inHg
Wind13.4 mph S
Humidity32%
Visibility—
Dew point31°
Tue, 0358° / 51°0.37
58 °
Mount Vernon, Tuesday, 3 November
Rain. High 58°, low 51°.
Pressure29.74 inHg
Wind28.5 mph SE
Humidity90%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0460° / 44°0.19
60 °
Mount Vernon, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high60°
Average low44°
Average precipitation0.19 in
Chance of precipitation35%
Record high78° (1978)
Record low17° (1991)
Thu, 0559° / 44°0.11
59 °
Mount Vernon, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.11 in
Chance of precipitation33%
Record high77° (2017)
Record low25° (1976)
Fri, 0659° / 42°0.1
59 °
Mount Vernon, Friday, 6 November
Climate normal for this date — 60-year average.
Average high59°
Average low42°
Average precipitation0.1 in
Chance of precipitation23%
Record high76° (1999)
Record low26° (1993)
Sat, 0759° / 43°0.06
59 °
Mount Vernon, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.06 in
Chance of precipitation18%
Record high78° (2023)
Record low24° (1991)
Sun, 0860° / 44°0.09
60 °
Mount Vernon, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high60°
Average low44°
Average precipitation0.09 in
Chance of precipitation17%
Record high79° (1980)
Record low17° (1991)
Mon, 0960° / 44°0.09
60 °
Mount Vernon, Monday, 9 November
Climate normal for this date — 60-year average.
Average high60°
Average low44°
Average precipitation0.09 in
Chance of precipitation28%
Record high78° (2006)
Record low23° (1991)
Tue, 1058° / 42°0.1
58 °
Mount Vernon, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high58°
Average low42°
Average precipitation0.1 in
Chance of precipitation32%
Record high75° (2022)
Record low17° (2018)
Wed, 1157° / 40°0.1
57 °
Mount Vernon, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high57°
Average low40°
Average precipitation0.1 in
Chance of precipitation27%
Record high75° (1989)
Record low21° (2019)
Thu, 1255° / 39°0.08
55 °
Mount Vernon, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.08 in
Chance of precipitation25%
Record high77° (1999)
Record low11° (2019)
Fri, 1356° / 39°0.06
56 °
Mount Vernon, Friday, 13 November
Climate normal for this date — 60-year average.
Average high56°
Average low39°
Average precipitation0.06 in
Chance of precipitation22%
Record high78° (1999)
Record low11° (1986)
Sat, 1456° / 41°0.08
56 °
Mount Vernon, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.08 in
Chance of precipitation28%
Record high76° (2025)
Record low15° (2018)
Sun, 1556° / 40°0.15
56 °
Mount Vernon, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high56°
Average low40°
Average precipitation0.15 in
Chance of precipitation37%
Record high78° (2025)
Record low20° (2018)
Mon, 1656° / 39°0.1
56 °
Mount Vernon, Monday, 16 November
Climate normal for this date — 60-year average.
Average high56°
Average low39°
Average precipitation0.1 in
Chance of precipitation23%
Record high74° (2016)
Record low24° (1997)
Tue, 1757° / 41°0.11
57 °
Mount Vernon, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high57°
Average low41°
Average precipitation0.11 in
Chance of precipitation27%
Record high74° (2016)
Record low19° (2014)
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 Mount Vernon, 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 Mount Vernon, 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.