10-day forecast for Mount Vernon, SD: 60° to 101°, with precipitation expected on 4 days. The table below breaks each day into morning, afternoon, evening and overnight.
97°
Best day: Tuesday, August 18
77° · 0.64 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 10101° / 65°0.25
Morning67°feels 67°
Afternoon97°feels 97°
Evening95°feels 95°
Overnight69°feels 69°
101 °
Mount Vernon, Monday, 10 August
Rain. High 101°, low 65°.
Pressure29.80 inHg
Wind9 mph E
Humidity41%
Visibility6.2 mi
Dew point63°
Tue, 1196° / 66°0.05
Morning69°feels 69°
Afternoon92°feels 93°
Evening88°feels 87°
Overnight72°feels 73°
96 °
Mount Vernon, Tuesday, 11 August
Light rain. High 96°, low 66°.
Pressure29.83 inHg
Wind11 mph NE
Humidity45%
Visibility6.2 mi
Dew point63°
Wed, 1293° / 66°0.16
Morning69°feels 70°
Afternoon91°feels 90°
Evening86°feels 86°
Overnight68°feels 69°
93 °
Mount Vernon, Wednesday, 12 August
Rain. High 93°, low 66°.
Pressure29.91 inHg
Wind7.5 mph E
Humidity45%
Visibility6.2 mi
Dew point61°
Thu, 1377° / 63°0.64
Morning64°feels 64°
Afternoon68°feels 68°
Evening75°feels 74°
Overnight67°feels 67°
77 °
Mount Vernon, Thursday, 13 August
Rain. High 77°, low 63°.
Pressure30.03 inHg
Wind15.2 mph E
Humidity79%
Visibility—
Dew point59°
Fri, 1481° / 60°0
Morning66°feels 65°
Afternoon77°feels 77°
Evening69°feels 69°
Overnight64°feels 63°
81 °
Mount Vernon, Friday, 14 August
Overcast. High 81°, low 60°.
Pressure30.09 inHg
Wind10.8 mph SE
Humidity45%
Visibility—
Dew point53°
Sat, 1579° / 63°0
Morning67°feels 67°
Afternoon77°feels 78°
Evening77°feels 77°
Overnight69°feels 69°
79 °
Mount Vernon, Saturday, 15 August
Overcast. High 79°, low 63°.
Pressure30.12 inHg
Wind11.8 mph SE
Humidity60%
Visibility—
Dew point60°
Sun, 1686° / 63°0.03
Morning69°feels 69°
Afternoon81°feels 83°
Evening76°feels 77°
Overnight70°feels 71°
86 °
Mount Vernon, Sunday, 16 August
Light rain. High 86°, low 63°.
Pressure30.06 inHg
Wind8.1 mph SE
Humidity57%
Visibility—
Dew point63°
Mon, 1794° / 66°0.01
Morning72°feels 74°
Afternoon89°feels 91°
Evening91°feels 91°
Overnight74°feels 75°
94 °
Mount Vernon, Monday, 17 August
Light rain. High 94°, low 66°.
Pressure29.97 inHg
Wind14.6 mph W
Humidity49%
Visibility—
Dew point63°
Tue, 1897° / 66°0.01
Morning73°feels 73°
Afternoon92°feels 90°
Evening92°feels 90°
Overnight75°feels 75°
97 °
Mount Vernon, Tuesday, 18 August
Light rain. High 97°, low 66°.
Pressure29.91 inHg
Wind14.9 mph W
Humidity30%
Visibility—
Dew point52°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Mount Vernon, SD around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.