Weather in South Yankton, NE
South Yankton, Sunday, 9 August, 10:21
Clear. Feels like 78°. High 90°, low 70°.
Monthly outlook for South Yankton, NE: average high 89°, average low 66.1°. That is 3.4° above the climate normal for August. Precipitation is expected on 4 days (about 2.0 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 24 August (102.5°), the coolest 18 August (61.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 86.7° | 82.9° | +2.1° |
| 19 August – 28 August | 92.9° | 83° | +5.5° |
| 29 August – 7 September | at normal | 81.2° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Yankton (3 mi).
0.01
South Yankton, Monday, 10 August
Light rain. High 91°, low 64°.
0
South Yankton, Tuesday, 11 August
Overcast. High 95°, low 68°.
0.01South Yankton, Wednesday, 12 August
Light rain. High 98°, low 69°.
1.42South Yankton, Thursday, 13 August
Heavy rain. High 78°, low 68°.
0.09South Yankton, Friday, 14 August
Light rain. High 75°, low 64°.
0.26South Yankton, Saturday, 15 August
Rain. High 81°, low 67°.
0South Yankton, Sunday, 16 August
Overcast. High 84°, low 65°.
0.01South Yankton, Monday, 17 August
Light rain. High 79°, low 67°.
0.22South Yankton, Tuesday, 18 August
Rain. High 96°, low 62°.
0
South Yankton, Wednesday, 19 August
Mostly clear. High 83°, low 63°.
0South Yankton, Thursday, 20 August
Overcast. High 94°, low 63°.
0South Yankton, Friday, 21 August
Mostly clear. High 97°, low 70°.
0South Yankton, Saturday, 22 August
Mostly clear. High 87°, low 64°.
0South Yankton, Sunday, 23 August
Overcast. High 94°, low 63°.
0South Yankton, Monday, 24 August
Clear. High 102°, low 70°.
0.11
South Yankton, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09South Yankton, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.1South Yankton, Thursday, 27 August
Climate normal for this date — 60-year average.
0.1South Yankton, Friday, 28 August
Climate normal for this date — 60-year average.
0.07South Yankton, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07South Yankton, Sunday, 30 August
Climate normal for this date — 60-year average.
0.11South Yankton, Monday, 31 August
Climate normal for this date — 60-year average.
0.06South Yankton, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.07South Yankton, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09South Yankton, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09South Yankton, Friday, 4 September
Climate normal for this date — 60-year average.
0.07South Yankton, Saturday, 5 September
Climate normal for this date — 60-year average.
0.04South Yankton, Sunday, 6 September
Climate normal for this date — 60-year average.
0.06South Yankton, 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 South Yankton, NE 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 South Yankton, NE 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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