Weather in Mount Vernon, SD
Mount Vernon, Tuesday, 13 October, 07:00
Clear. Feels like 39°. High 54°, low 45°.
Monthly outlook for Mount Vernon, SD: average high 61.2°, average low 45.7°. That is 1.8° above the climate normal for October. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 20 October (72.1°), the coolest 24 October (37.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 October – 22 October | 63.2° | 59.1° | +2.3° |
| 23 October – 1 November | 57.9° | 54.4° | +1.9° |
| 2 November – 11 November | at normal | 48.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Stickney (12 mi).
0
Mount Vernon, Wednesday, 14 October
Light rain. High 56°, low 41°.
0.47Mount Vernon, Thursday, 15 October
Rain. High 62°, low 48°.
0
Mount Vernon, Friday, 16 October
Clear. High 53°, low 42°.
0Mount Vernon, Saturday, 17 October
Clear. High 67°, low 42°.
0
Mount Vernon, Sunday, 18 October
Overcast. High 63°, low 50°.
0Mount Vernon, Monday, 19 October
Clear. High 67°, low 46°.
0Mount Vernon, Tuesday, 20 October
Clear. High 72°, low 50°.
0.14Mount Vernon, Wednesday, 21 October
Light rain. High 71°, low 64°.
0.32Mount Vernon, Thursday, 22 October
Rain. High 67°, low 51°.
0.14Mount Vernon, Friday, 23 October
Rain. High 53°, low 44°.
0Mount Vernon, Saturday, 24 October
Clear. High 54°, low 37°.
0Mount Vernon, Sunday, 25 October
Clear. High 57°, low 40°.
0
Mount Vernon, Monday, 26 October
Partly cloudy. High 58°, low 42°.
0Mount Vernon, Tuesday, 27 October
Clear. High 62°, low 43°.
0Mount Vernon, Wednesday, 28 October
Clear. High 63°, low 43°.
0.07Mount Vernon, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09Mount 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.
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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