Monthly outlook for Mount Vernon, WI: average high 61°, average low 44.6°. That is 4° above the climate normal for October. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 24 October (67.9°), the coolest 26 October (33.1°).
61°/44.6°
Average high / low
+4°
Above normal
2 / 5
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
60.7°
55°
+3.1°
28 October – 6 November
61.7°
50.7°
+6.1°
7 November – 16 November
at normal
44.7°
—
October records over 66 years
84.7°3 October 2025All-time high
21.6°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Mount Horeb (6 mi).
Mon, 1962° / 41°0
62 °
Mount Vernon, Monday, 19 October
Partly cloudy. High 62°, low 41°.
Pressure30.39 inHg
Wind4.7 mph SW
Humidity65%
Visibility6.2 mi
Dew point47°
Tue, 2063° / 42°0
63 °
Mount Vernon, Tuesday, 20 October
Clear. High 63°, low 42°.
Pressure30.39 inHg
Wind6 mph SE
Humidity61%
Visibility6.2 mi
Dew point47°
Wed, 2165° / 43°0
65 °
Mount Vernon, Wednesday, 21 October
Clear. High 65°, low 43°.
Pressure30.27 inHg
Wind6.2 mph S
Humidity63%
Visibility6.2 mi
Dew point49°
Thu, 2265° / 50°0
65 °
Mount Vernon, Thursday, 22 October
Overcast. High 65°, low 50°.
Pressure30.30 inHg
Wind8.2 mph E
Humidity65%
Visibility—
Dew point50°
Fri, 2366° / 52°0
66 °
Mount Vernon, Friday, 23 October
Overcast. High 66°, low 52°.
Pressure30.30 inHg
Wind12.7 mph SE
Humidity57%
Visibility—
Dew point47°
Sat, 2468° / 56°0
68 °
Mount Vernon, Saturday, 24 October
Overcast. High 68°, low 56°.
Pressure30.12 inHg
Wind17.7 mph S
Humidity45%
Visibility—
Dew point44°
Sun, 2552° / 38°0
52 °
Mount Vernon, Sunday, 25 October
Overcast. High 52°, low 38°.
Pressure30.39 inHg
Wind15.9 mph NW
Humidity51%
Visibility—
Dew point32°
Mon, 2653° / 33°0
53 °
Mount Vernon, Monday, 26 October
Clear. High 53°, low 33°.
Pressure30.39 inHg
Wind10.3 mph W
Humidity35%
Visibility—
Dew point22°
Tue, 2754° / 35°0
54 °
Mount Vernon, Tuesday, 27 October
Light rain. High 54°, low 35°.
Pressure30.27 inHg
Wind10.4 mph S
Humidity37%
Visibility—
Dew point26°
Wed, 2864° / 47°0.02
64 °
Mount Vernon, Wednesday, 28 October
Light rain. High 64°, low 47°.
Pressure29.97 inHg
Wind19 mph S
Humidity65%
Visibility—
Dew point46°
Thu, 2961° / 55°0.22
61 °
Mount Vernon, Thursday, 29 October
Rain. High 61°, low 55°.
Pressure29.68 inHg
Wind19 mph SW
Humidity82%
Visibility—
Dew point53°
Fri, 3060° / 44°0
60 °
Mount Vernon, Friday, 30 October
Clear. High 60°, low 44°.
Pressure29.91 inHg
Wind12 mph W
Humidity33%
Visibility—
Dew point28°
Sat, 3163° / 45°0.03
63 °
Mount Vernon, Saturday, 31 October
Light rain. High 63°, low 45°.
Pressure30.03 inHg
Wind16.1 mph SE
Humidity42%
Visibility—
Dew point37°
Sun, 0159° / 47°0.04
59 °
Mount Vernon, Sunday, 1 November
Light rain. High 59°, low 47°.
Pressure29.77 inHg
Wind19.8 mph W
Humidity49%
Visibility—
Dew point39°
Mon, 0264° / 44°0
64 °
Mount Vernon, Monday, 2 November
Clear. High 64°, low 44°.
Pressure30.03 inHg
Wind15 mph S
Humidity39%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0349° / 37°0.06
49 °
Mount Vernon, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.06 in
Chance of precipitation23%
Record high69° (1964)
Record low14° (1991)
Wed, 0449° / 37°0.09
49 °
Mount Vernon, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.09 in
Chance of precipitation28%
Record high69° (2008)
Record low11° (1991)
Thu, 0549° / 36°0.09
49 °
Mount Vernon, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.09 in
Chance of precipitation27%
Record high68° (2020)
Record low18° (1991)
Fri, 0648° / 35°0.07
48 °
Mount Vernon, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation32%
Record high68° (2020)
Record low14° (1991)
Sat, 0748° / 35°0.03
48 °
Mount Vernon, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.03 in
Chance of precipitation18%
Record high67° (2020)
Record low5° (1991)
Sun, 0848° / 35°0.04
48 °
Mount Vernon, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.04 in
Chance of precipitation22%
Record high70° (2020)
Record low9° (1991)
Mon, 0947° / 35°0.1
47 °
Mount Vernon, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.1 in
Chance of precipitation33%
Record high71° (2020)
Record low17° (1991)
Tue, 1046° / 33°0.11
46 °
Mount Vernon, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.11 in
Chance of precipitation33%
Record high69° (2022)
Record low12° (2017)
Wed, 1144° / 31°0.07
44 °
Mount Vernon, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.07 in
Chance of precipitation27%
Record high67° (1964)
Record low12° (2019)
Thu, 1242° / 30°0.06
42 °
Mount Vernon, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.06 in
Chance of precipitation32%
Record high62° (1964)
Record low2° (2019)
Fri, 1343° / 30°0.04
43 °
Mount Vernon, Friday, 13 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.04 in
Chance of precipitation18%
Record high66° (1999)
Record low5° (1986)
Sat, 1444° / 31°0.03
44 °
Mount Vernon, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.03 in
Chance of precipitation20%
Record high64° (1971)
Record low14° (2019)
Sun, 1544° / 32°0.06
44 °
Mount Vernon, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.06 in
Chance of precipitation28%
Record high66° (2025)
Record low13° (1995)
Mon, 1644° / 31°0.05
44 °
Mount Vernon, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.05 in
Chance of precipitation22%
Record high60° (2023)
Record low19° (1989)
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, WI 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, WI 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.