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As of 01:35 CDT

Weather in River Sioux, IA

69°Current weather

River Sioux, Sunday, 9 August, 01:35

Clear. Feels like 70°. High 94°, low 69°.

Pressure29.85 inHg
Wind9.6 mph S
Humidity90%
Visibility6.2 mi
Dew point67°
Mon, 1091° / 73°0Overcast
91 °Overcast

River Sioux, Monday, 10 August

Overcast. High 91°, low 73°.

Pressure29.85 inHg
Wind15.1 mph SE
Humidity48%
Visibility6.2 mi
Dew point65°
Tue, 11107° / 70°0Partly cloudy
107 °Partly cloudy

River Sioux, Tuesday, 11 August

Partly cloudy. High 107°, low 70°.

Pressure29.71 inHg
Wind2 mph W
Humidity24%
Visibility6.2 mi
Dew point57°
Wed, 1296° / 70°0.07Light rain
96 °Light rain

River Sioux, Wednesday, 12 August

Light rain. High 96°, low 70°.

Pressure29.85 inHg
Wind9.4 mph E
Humidity80%
Visibility6.2 mi
Dew point71°
Thu, 1376° / 62°0.48Rain
76 °Rain

River Sioux, Thursday, 13 August

Rain. High 76°, low 62°.

Pressure30.00 inHg
Wind18.2 mph E
Humidity94%
Visibility—
Dew point64°
Fri, 1466° / 62°0.13Light rain
66 °Light rain

River Sioux, Friday, 14 August

Light rain. High 66°, low 62°.

Pressure30.09 inHg
Wind12.1 mph E
Humidity95%
Visibility—
Dew point62°
Sat, 1573° / 63°0Overcast
73 °Overcast

River Sioux, Saturday, 15 August

Overcast. High 73°, low 63°.

Pressure30.12 inHg
Wind9.1 mph E
Humidity77%
Visibility—
Dew point63°
Sun, 1689° / 64°0Overcast
89 °Overcast

River Sioux, Sunday, 16 August

Overcast. High 89°, low 64°.

Pressure30.12 inHg
Wind8.7 mph N
Humidity51%
Visibility—
Dew point62°
Mon, 1790° / 68°0Light rain
90 °Light rain

River Sioux, Monday, 17 August

Light rain. High 90°, low 68°.

Pressure30.03 inHg
Wind12.6 mph S
Humidity44%
Visibility—
Dew point62°
Tue, 18100° / 68°0Overcast
100 °Overcast

River Sioux, Tuesday, 18 August

Overcast. High 100°, low 68°.

Pressure29.80 inHg
Wind14.6 mph S
Humidity40%
Visibility—
Dew point63°
Wed, 19110° / 74°0Overcast
110 °Overcast

River Sioux, Wednesday, 19 August

Overcast. High 110°, low 74°.

Pressure29.71 inHg
Wind16.9 mph E
Humidity21%
Visibility—
Dew point52°
Thu, 20105° / 75°0.01Light rain
105 °Light rain

River Sioux, Thursday, 20 August

Light rain. High 105°, low 75°.

Pressure29.77 inHg
Wind19 mph N
Humidity27%
Visibility—
Dew point59°
Fri, 2197° / 68°0.05Light rain
97 °Light rain

River Sioux, Friday, 21 August

Light rain. High 97°, low 68°.

Pressure29.85 inHg
Wind18.7 mph E
Humidity33%
Visibility—
Dew point55°
Sat, 22115° / 70°0Clear
115 °Clear

River Sioux, Saturday, 22 August

Clear. High 115°, low 70°.

Pressure29.65 inHg
Wind20.9 mph SW
Humidity13%
Visibility—
Dew point44°
Sun, 2397° / 76°0.01Light rain
97 °Light rain

River Sioux, Sunday, 23 August

Light rain. High 97°, low 76°.

Pressure29.80 inHg
Wind17.3 mph NE
Humidity48%
Visibility—
Dew point66°
Mon, 2499° / 70°0.06Light rain
99 °Light rain

River Sioux, Monday, 24 August

Light rain. High 99°, low 70°.

Pressure29.88 inHg
Wind14.9 mph N
Humidity37%
Visibility—
Dew point61°

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.