As of 08:28 CDT

Weather in Mount Vernon, SD

40°Current weather

Mount Vernon, Saturday, 17 October, 08:28

Clear. Feels like 31°. High 65°, low 36°.

Pressure30.36 inHg
Wind17.3 mph S
Humidity75%
Visibility6.2 mi
Dew point32°

Monthly outlook for Mount Vernon, SD: average high 64.8°, average low 45.9°. That is 4.8° above the climate normal for October. Precipitation is expected on 5 days (about 0.7 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 23 October (74.2°), the coolest 31 October (35.4°).

64.8°/45.9°
Average high / low
+4.8°
Above normal
5 / 3
Wet days / normal
0.7 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
17 October – 26 October67.5°58°+5.3°
27 October – 5 November60.4°52°+4.7°
6 November – 15 Novemberat normal46.4°—

October records over 66 years

90.7°9 October 1980All-time high
9°26 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Stickney (12 mi).

Sun, 1867° / 46°0Clear
67 °Clear

Mount Vernon, Sunday, 18 October

Clear. High 67°, low 46°.

Pressure30.03 inHg
Wind7.7 mph S
Humidity45%
Visibility6.2 mi
Dew point40°
Mon, 1961° / 42°0Overcast
61 °Overcast

Mount Vernon, Monday, 19 October

Overcast. High 61°, low 42°.

Pressure30.21 inHg
Wind6.4 mph SE
Humidity65%
Visibility6.2 mi
Dew point45°
Tue, 2068° / 49°0Clear
68 °Clear

Mount Vernon, Tuesday, 20 October

Clear. High 68°, low 49°.

Pressure30.15 inHg
Wind10.5 mph S
Humidity64%
Visibility6.2 mi
Dew point49°
Wed, 2170° / 51°0Clear
70 °Clear

Mount Vernon, Wednesday, 21 October

Clear. High 70°, low 51°.

Pressure30.09 inHg
Wind7.5 mph S
Humidity64%
Visibility—
Dew point52°
Thu, 2274° / 49°0Clear
74 °Clear

Mount Vernon, Thursday, 22 October

Clear. High 74°, low 49°.

Pressure30.12 inHg
Wind11.3 mph SE
Humidity65%
Visibility—
Dew point55°
Fri, 2374° / 61°0.07Light rain
74 °Light rain

Mount Vernon, Friday, 23 October

Light rain. High 74°, low 61°.

Pressure29.74 inHg
Wind24.2 mph S
Humidity82%
Visibility—
Dew point61°
Sat, 2467° / 47°0.11Light rain
67 °Light rain

Mount Vernon, Saturday, 24 October

Light rain. High 67°, low 47°.

Pressure29.71 inHg
Wind23.6 mph W
Humidity51%
Visibility—
Dew point46°
Sun, 2560° / 49°0Partly cloudy
60 °Partly cloudy

Mount Vernon, Sunday, 25 October

Partly cloudy. High 60°, low 49°.

Pressure30.12 inHg
Wind17.8 mph W
Humidity45%
Visibility—
Dew point34°
Mon, 2669° / 48°0.3Rain
69 °Rain

Mount Vernon, Monday, 26 October

Rain. High 69°, low 48°.

Pressure29.80 inHg
Wind23.6 mph S
Humidity62%
Visibility—
Dew point50°
Tue, 2774° / 49°0Clear
74 °Clear

Mount Vernon, Tuesday, 27 October

Clear. High 74°, low 49°.

Pressure29.68 inHg
Wind19.1 mph SW
Humidity26%
Visibility—
Dew point29°
Wed, 2862° / 48°0Overcast
62 °Overcast

Mount Vernon, Wednesday, 28 October

Overcast. High 62°, low 48°.

Pressure29.85 inHg
Wind23 mph W
Humidity34%
Visibility—
Dew point31°
Thu, 2961° / 44°0Overcast
61 °Overcast

Mount Vernon, Thursday, 29 October

Overcast. High 61°, low 44°.

Pressure29.83 inHg
Wind25.8 mph S
Humidity28%
Visibility—
Dew point26°
Fri, 3060° / 44°0.21Light rain
60 °Light rain

Mount Vernon, Friday, 30 October

Light rain. High 60°, low 44°.

Pressure29.29 inHg
Wind21.8 mph S
Humidity95%
Visibility—
Dew point51°
Sat, 3144° / 35°0.04Snow
44 °Snow

Mount Vernon, Saturday, 31 October

Snow. High 44°, low 35°.

Pressure29.80 inHg
Wind29.1 mph NW
Humidity51%
Visibility—
Dew point25°
Sun, 0161° / 37°0Overcast
61 °Overcast

Mount Vernon, Sunday, 1 November

Overcast. High 61°, low 37°.

Pressure29.94 inHg
Wind14.6 mph S
Humidity32%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0251° / 35°0.04Climate normal
51 °Climate normal

Mount Vernon, Monday, 2 November

Climate normal for this date — 60-year average.

Average high51°
Average low35°
Average precipitation0.04 in
Chance of precipitation13%
Record high74° (2005)
Record low10° (1991)
Tue, 0350° / 35°0.04Climate normal
50 °Climate normal

Mount Vernon, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high50°
Average low35°
Average precipitation0.04 in
Chance of precipitation15%
Record high74° (1978)
Record low7° (1991)
Wed, 0450° / 32°0.01Climate normal
50 °Climate normal

Mount Vernon, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high50°
Average low32°
Average precipitation0.01 in
Chance of precipitation8%
Record high73° (1978)
Record low-7° (1991)
Thu, 0551° / 33°0.03Climate normal
51 °Climate normal

Mount Vernon, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high51°
Average low33°
Average precipitation0.03 in
Chance of precipitation17%
Record high74° (2001)
Record low13° (2003)
Fri, 0650° / 33°0.02Climate normal
50 °Climate normal

Mount Vernon, Friday, 6 November

Climate normal for this date — 60-year average.

Average high50°
Average low33°
Average precipitation0.02 in
Chance of precipitation15%
Record high78° (2020)
Record low3° (2003)
Sat, 0750° / 33°0.03Climate normal
50 °Climate normal

Mount Vernon, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high50°
Average low33°
Average precipitation0.03 in
Chance of precipitation13%
Record high74° (2020)
Record low2° (1991)
Sun, 0849° / 33°0.07Climate normal
49 °Climate normal

Mount Vernon, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high49°
Average low33°
Average precipitation0.07 in
Chance of precipitation18%
Record high75° (2006)
Record low7° (1991)
Mon, 0946° / 32°0.09Climate normal
46 °Climate normal

Mount Vernon, Monday, 9 November

Climate normal for this date — 60-year average.

Average high46°
Average low32°
Average precipitation0.09 in
Chance of precipitation22%
Record high68° (1999)
Record low11° (2018)
Tue, 1045° / 29°0.04Climate normal
45 °Climate normal

Mount Vernon, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high45°
Average low29°
Average precipitation0.04 in
Chance of precipitation17%
Record high65° (2016)
Record low2° (1986)
Wed, 1143° / 28°0.04Climate normal
43 °Climate normal

Mount Vernon, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high43°
Average low28°
Average precipitation0.04 in
Chance of precipitation18%
Record high70° (2005)
Record low-5° (1986)
Thu, 1244° / 28°0.05Climate normal
44 °Climate normal

Mount Vernon, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high44°
Average low28°
Average precipitation0.05 in
Chance of precipitation22%
Record high68° (1999)
Record low1° (1966)
Fri, 1346° / 29°0.02Climate normal
46 °Climate normal

Mount Vernon, Friday, 13 November

Climate normal for this date — 60-year average.

Average high46°
Average low29°
Average precipitation0.02 in
Chance of precipitation17%
Record high72° (1999)
Record low-11° (1986)
Sat, 1446° / 30°0.02Climate normal
46 °Climate normal

Mount Vernon, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high46°
Average low30°
Average precipitation0.02 in
Chance of precipitation17%
Record high77° (2025)
Record low6° (2014)
Sun, 1545° / 29°0.04Climate normal
45 °Climate normal

Mount Vernon, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high45°
Average low29°
Average precipitation0.04 in
Chance of precipitation18%
Record high65° (2001)
Record low3° (2000)

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, SD 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, SD 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.