Weather in Mountain Plains, SD
Mountain Plains, Sunday, 9 August, 00:33
Clear. Feels like 67°. High 86°, low 62°.
Monthly outlook for Mountain Plains, SD: average high 83.8°, average low 61.9°. That is 1.3° above the climate normal for August. Precipitation is expected on 7 days (about 0.8 inches), against a normal of 5 days and 0.9 inches. The warmest day looks like 17 August (93.1°), the coolest 19 August (55°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 84.5° | 81.4° | +1.7° |
| 19 August – 28 August | 82.7° | 81.4° | +0.7° |
| 29 August – 7 September | at normal | 79.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Whitewood (11 mi).
0
Mountain Plains, Monday, 10 August
Clear. High 91°, low 63°.
0.05
Mountain Plains, Tuesday, 11 August
Light rain. High 90°, low 62°.
0.06Mountain Plains, Wednesday, 12 August
Light rain. High 90°, low 64°.
0.08Mountain Plains, Thursday, 13 August
Light rain. High 70°, low 60°.
0.12Mountain Plains, Friday, 14 August
Light rain. High 75°, low 59°.
0.17Mountain Plains, Saturday, 15 August
Light rain. High 73°, low 61°.
0.01Mountain Plains, Sunday, 16 August
Light rain. High 89°, low 61°.
0Mountain Plains, Monday, 17 August
Clear. High 93°, low 67°.
0
Mountain Plains, Tuesday, 18 August
Overcast. High 89°, low 64°.
0
Mountain Plains, Wednesday, 19 August
Partly cloudy. High 82°, low 55°.
0.22Mountain Plains, Thursday, 20 August
Rain. High 83°, low 60°.
0.12Mountain Plains, Friday, 21 August
Light rain. High 74°, low 64°.
0Mountain Plains, Saturday, 22 August
Clear. High 78°, low 61°.
0
Mountain Plains, Sunday, 23 August
Mostly clear. High 91°, low 59°.
0Mountain Plains, Monday, 24 August
Mostly clear. High 88°, low 71°.
0.03Mountain Plains, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.07
Mountain Plains, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.06Mountain Plains, Thursday, 27 August
Climate normal for this date — 60-year average.
0.02Mountain Plains, Friday, 28 August
Climate normal for this date — 60-year average.
0.04Mountain Plains, Saturday, 29 August
Climate normal for this date — 60-year average.
0.04Mountain Plains, Sunday, 30 August
Climate normal for this date — 60-year average.
0.05Mountain Plains, Monday, 31 August
Climate normal for this date — 60-year average.
0.05Mountain Plains, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.05Mountain Plains, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.03Mountain Plains, Thursday, 3 September
Climate normal for this date — 60-year average.
0.08Mountain Plains, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Mountain Plains, Saturday, 5 September
Climate normal for this date — 60-year average.
0.05Mountain Plains, Sunday, 6 September
Climate normal for this date — 60-year average.
0.05Mountain Plains, Monday, 7 September
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 Mountain Plains, 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 Mountain Plains, 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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