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CheckWeather US›Sioux Falls

Sioux Falls weather

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NWSNational Blend (NBM)
74°
Light drizzle
Feels 76° · Wind 7 mph · Humidity 69%
AmericanNOAA GFS
73°
Overcast
Feels 74° · Wind 9 mph · Humidity 69%
EuropeanECMWF
76°
Light drizzle
Feels 77° · Wind 6 mph · Humidity 62%

Latest for Sioux Falls: NWS (National Blend (NBM)): 74° Light drizzle · American (NOAA GFS): 73° Overcast · European (ECMWF): 76° Light drizzle.

The weather map: all three models at once

NWS, American, European side by side around Sioux Falls and nearby towns.Live rain radar →
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Next 14 hours

consensus of the three models

7-day forecast

where the models agree, and where they split

Sioux Falls, SD is at its warmest in Jul (average highs near 82°F) and coldest in Jan (lows around 10°F), with roughly 28 in of precipitation across the year. Below, compare what NWS, American, European forecast for Sioux Falls right now, and see exactly where they disagree.

Sioux Falls climate by month

average daytime high and overnight low across a typical year
Jan
22°
10°
Feb
36°
17°
Mar
41°
22°
Apr
58°
38°
May
72°
51°
Jun
81°
62°
Jul
82°
63°
Aug
82°
64°
Sep
79°
59°
Oct
63°
45°
Nov
47°
30°
Dec
36°
23°

Which forecast is most accurate in the US?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
European logo
European ★ Best
Behind Apple Weather, Windy
88
/100rank #1
85±1.5°F96±1.2 mph8592% hitECMWF — European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
Behind Windy & many free apps
74
/100rank #2
82±1.8°F92±2.6 mph5374% 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 40 cities. Lower error means a higher score. The apps you know (AccuWeather, Apple Weather, The Weather Channel) are built on these models.

Common questions

What's the weather in Sioux Falls today?
On this page we show what NWS, American, European each forecast for Sioux Falls 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 Sioux Falls today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Sioux Falls 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 Sioux Falls?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Sioux Falls 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 Sioux Falls?
Jul is typically the warmest month in Sioux Falls, with average highs around 82°F.
How cold does Sioux Falls get?
The coldest month in Sioux Falls is Jan, when overnight lows average about 10°F.
How much rain does Sioux Falls get?
Sioux Falls sees roughly 28 in of precipitation a year, with Jun usually the wettest month.

The forecasts Americans check

The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.

NWSNational Weather Service
Open model · shown above ✓AWAccuWeather
Closed model · open ↗↗TWCThe Weather Channel
Closed model · open ↗↗

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