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As of 03:00 CDT

Weather in River Sioux, IA

48°Current weather

River Sioux, Friday, 16 October, 03:00

Overcast. Feels like 42°. High 52°, low 39°.

Pressure30.30 inHg
Wind18.4 mph NW
Humidity66%
Visibility6.2 mi
Dew point37°
Sat, 1759° / 34°0Clear
59 °Clear

River Sioux, Saturday, 17 October

Clear. High 59°, low 34°.

Pressure30.47 inHg
Wind13.4 mph S
Humidity43%
Visibility6.2 mi
Dew point32°
Sun, 1864° / 43°0Clear
64 °Clear

River Sioux, Sunday, 18 October

Clear. High 64°, low 43°.

Pressure30.24 inHg
Wind14.9 mph S
Humidity54%
Visibility6.2 mi
Dew point40°
Mon, 1963° / 47°0Overcast
63 °Overcast

River Sioux, Monday, 19 October

Overcast. High 63°, low 47°.

Pressure30.18 inHg
Wind11.1 mph S
Humidity69%
Visibility6.2 mi
Dew point46°
Tue, 2069° / 50°0Clear
69 °Clear

River Sioux, Tuesday, 20 October

Clear. High 69°, low 50°.

Pressure30.12 inHg
Wind13.5 mph S
Humidity53%
Visibility—
Dew point46°
Wed, 2174° / 55°0.01Light rain
74 °Light rain

River Sioux, Wednesday, 21 October

Light rain. High 74°, low 55°.

Pressure30.09 inHg
Wind14.2 mph S
Humidity54%
Visibility—
Dew point49°
Thu, 2275° / 57°0.01Light rain
75 °Light rain

River Sioux, Thursday, 22 October

Light rain. High 75°, low 57°.

Pressure30.03 inHg
Wind14.7 mph S
Humidity64%
Visibility—
Dew point59°
Fri, 2371° / 62°0Overcast
71 °Overcast

River Sioux, Friday, 23 October

Overcast. High 71°, low 62°.

Pressure29.88 inHg
Wind24.6 mph SE
Humidity41%
Visibility—
Dew point45°
Sat, 2465° / 52°0Clear
65 °Clear

River Sioux, Saturday, 24 October

Clear. High 65°, low 52°.

Pressure30.15 inHg
Wind22.3 mph S
Humidity46%
Visibility—
Dew point40°
Sun, 2549° / 45°0.02Light rain
49 °Light rain

River Sioux, Sunday, 25 October

Light rain. High 49°, low 45°.

Pressure30.42 inHg
Wind13.2 mph N
Humidity63%
Visibility—
Dew point34°
Mon, 2650° / 45°1.09Rain
50 °Rain

River Sioux, Monday, 26 October

Rain. High 50°, low 45°.

Pressure29.91 inHg
Wind15 mph NW
Humidity91%
Visibility—
Dew point46°
Tue, 2754° / 41°0.17Rain
54 °Rain

River Sioux, Tuesday, 27 October

Rain. High 54°, low 41°.

Pressure30.03 inHg
Wind11.7 mph NW
Humidity68%
Visibility—
Dew point40°
Wed, 2849° / 41°0.41Rain
49 °Rain

River Sioux, Wednesday, 28 October

Rain. High 49°, low 41°.

Pressure29.91 inHg
Wind17.2 mph NW
Humidity89%
Visibility—
Dew point41°
Thu, 2958° / 38°0Partly cloudy
58 °Partly cloudy

River Sioux, Thursday, 29 October

Partly cloudy. High 58°, low 38°.

Pressure30.00 inHg
Wind6 mph W
Humidity58%
Visibility—
Dew point37°
Fri, 3063° / 45°0Partly cloudy
63 °Partly cloudy

River Sioux, Friday, 30 October

Partly cloudy. High 63°, low 45°.

Pressure30.09 inHg
Wind7 mph S
Humidity40%
Visibility—
Dew point34°
Sat, 3165° / 49°0Overcast
65 °Overcast

River Sioux, Saturday, 31 October

Overcast. High 65°, low 49°.

Pressure29.85 inHg
Wind10.8 mph SW
Humidity58%
Visibility—
Dew point47°

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 River Sioux, IA 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 River Sioux, IA 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.