Weather in Mount Vernon, SD
Mount Vernon, Wednesday, 14 October, 08:36
Overcast. Feels like 34°. High 57°, low 39°.
Monthly outlook for Mount Vernon, SD: average high 62.8°, average low 44.3°. That is 3° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 21 October (74°), the coolest 29 October (37.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 14 October – 23 October | 63.9° | 58.7° | +2.9° |
| 24 October – 2 November | 61° | 53.8° | +4° |
| 3 November – 12 November | at normal | 47.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Stickney (12 mi).
0
Mount Vernon, Thursday, 15 October
Light rain. High 59°, low 46°.
0.01Mount Vernon, Friday, 16 October
Light rain. High 52°, low 38°.
0
Mount Vernon, Saturday, 17 October
Clear. High 64°, low 38°.
0Mount Vernon, Sunday, 18 October
Clear. High 67°, low 46°.
0Mount Vernon, Monday, 19 October
Overcast. High 65°, low 44°.
0Mount Vernon, Tuesday, 20 October
Clear. High 73°, low 50°.
0Mount Vernon, Wednesday, 21 October
Overcast. High 74°, low 56°.
0Mount Vernon, Thursday, 22 October
Clear. High 65°, low 45°.
0.22Mount Vernon, Friday, 23 October
Light rain. High 64°, low 52°.
0.04Mount Vernon, Saturday, 24 October
Light rain. High 55°, low 44°.
0Mount Vernon, Sunday, 25 October
Clear. High 67°, low 39°.
0Mount Vernon, Monday, 26 October
Clear. High 64°, low 46°.
0Mount Vernon, Tuesday, 27 October
Overcast. High 65°, low 48°.
0.07Mount Vernon, Wednesday, 28 October
Light rain. High 52°, low 41°.
0Mount Vernon, Thursday, 29 October
Overcast. High 62°, low 38°.
0.09
Mount Vernon, Friday, 30 October
Climate normal for this date — 60-year average.
0.05
Mount Vernon, Saturday, 31 October
Climate normal for this date — 60-year average.
0.04Mount Vernon, Sunday, 1 November
Climate normal for this date — 60-year average.
0.04Mount Vernon, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Mount Vernon, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.01Mount Vernon, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.03Mount Vernon, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Mount Vernon, Friday, 6 November
Climate normal for this date — 60-year average.
0.03Mount Vernon, Saturday, 7 November
Climate normal for this date — 60-year average.
0.07Mount Vernon, Sunday, 8 November
Climate normal for this date — 60-year average.
0.09Mount Vernon, Monday, 9 November
Climate normal for this date — 60-year average.
0.04Mount Vernon, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.04Mount Vernon, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.05Mount Vernon, Thursday, 12 November
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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