Weather in South Sioux City, NE
South Sioux City, Sunday, 9 August, 11:47
Clear. Feels like 88°. High 93°, low 71°.
Monthly outlook for South Sioux City, NE: average high 88.6°, average low 65.1°. That is 3.6° above the climate normal for August. Precipitation is expected on 4 days (about 1.7 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 24 August (100.1°), the coolest 23 August (60.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 86° | 82° | +2.2° |
| 19 August – 28 August | 92.8° | 82.2° | +5.9° |
| 29 August – 7 September | at normal | 80.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Sioux City (3 mi).
0
South Sioux City, Monday, 10 August
Overcast. High 90°, low 68°.
0South Sioux City, Tuesday, 11 August
Overcast. High 97°, low 67°.
0South Sioux City, Wednesday, 12 August
Overcast. High 99°, low 69°.
1.09
South Sioux City, Thursday, 13 August
Heavy rain. High 77°, low 67°.
0.14South Sioux City, Friday, 14 August
Light rain. High 72°, low 64°.
0.22South Sioux City, Saturday, 15 August
Light rain. High 78°, low 66°.
0South Sioux City, Sunday, 16 August
Overcast. High 85°, low 66°.
0South Sioux City, Monday, 17 August
Light rain. High 76°, low 65°.
0.23South Sioux City, Tuesday, 18 August
Rain. High 94°, low 62°.
0South Sioux City, Wednesday, 19 August
Clear. High 84°, low 62°.
0South Sioux City, Thursday, 20 August
Overcast. High 91°, low 61°.
0South Sioux City, Friday, 21 August
Clear. High 100°, low 65°.
0
South Sioux City, Saturday, 22 August
Mostly clear. High 89°, low 65°.
0South Sioux City, Sunday, 23 August
Light rain. High 94°, low 60°.
0.02South Sioux City, Monday, 24 August
Light rain. High 100°, low 64°.
0.09
South Sioux City, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.11
South Sioux City, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.09South Sioux City, Thursday, 27 August
Climate normal for this date — 60-year average.
0.14South Sioux City, Friday, 28 August
Climate normal for this date — 60-year average.
0.07South Sioux City, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09South Sioux City, Sunday, 30 August
Climate normal for this date — 60-year average.
0.09South Sioux City, Monday, 31 August
Climate normal for this date — 60-year average.
0.08South Sioux City, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.08South Sioux City, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.13South Sioux City, Thursday, 3 September
Climate normal for this date — 60-year average.
0.11South Sioux City, Friday, 4 September
Climate normal for this date — 60-year average.
0.08South Sioux City, Saturday, 5 September
Climate normal for this date — 60-year average.
0.05South Sioux City, Sunday, 6 September
Climate normal for this date — 60-year average.
0.08South Sioux City, 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 Sioux City, 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 Sioux City, 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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