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CheckWeather USSouth Sioux City

South Sioux City weather

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South Sioux City weather alerts and warnings

active National Weather Service watches, warnings and advisories

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South Sioux City weather in numbers

from 30 years of measured normals

South Sioux City swings 72°F across the year, from 84°F highs in July to 12°F lows in January, and June is usually the wettest month in a year that brings about 31 in of precipitation.

Warmest month
July
84°F average high
Coldest month
January
12°F average low
Wettest month
June
31 in a year
Below freezing
4 months
January, February, March and December
Comfortable
3 months
April, May and October
Residents
13,000
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The weather map: all three models at once

NWS, American, European side by side around South Sioux City and nearby towns.Live rain radar →
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South Sioux City hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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South Sioux City 10-day forecast, out to 14 days

where the models agree, and where they split

South Sioux City, Nebraska (NE) is at its warmest in Jul (average highs near 84°F) and coldest in Jan (lows around 12°F), with roughly 31 in of precipitation across the year. Below, compare what NWS, American, European forecast for South Sioux City right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

South Sioux City climate by month

average daytime high and overnight low across a typical year
Jan
25°
12°
Feb
42°
21°
Mar
47°
27°
Apr
61°
41°
May
75°
53°
Jun
83°
63°
Jul
84°
65°
Aug
84°
66°
Sep
81°
61°
Oct
66°
47°
Nov
50°
33°
Dec
38°
24°

Which forecast is most accurate in the US?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
89
/100rank #1
88±1.2°F96±1.2 mph8491% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
73
/100rank #2
82±1.8°F93±2.3 mph4972% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Common questions

What's the weather in South Sioux City today?
On this page we show what NWS, American, European each forecast for South Sioux City today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in South Sioux City today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for South Sioux City and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for South Sioux City?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the South Sioux City forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in South Sioux City?
July is typically the warmest month in South Sioux City, with average highs around 84°F.
How cold does South Sioux City get?
The coldest month in South Sioux City is January, when overnight lows average about 12°F.
How much rain does South Sioux City get?
South Sioux City sees roughly 31 in of precipitation a year, with June usually the wettest month.

Nearby

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