As of 05:29 CDT

Weather in River Sioux, IA

39°

River Sioux, Sunday, 18 October, 05:29

Clear. Feels like 34°. High 67°, low 39°.

Pressure30.21 inHg

Wind8.1 mph S

Humidity87%

Visibility6.2 mi

Dew point36°

See detailed hourly forecast

Mon, 1965° / 47°

65 °

River Sioux, Monday, 19 October

Overcast. High 65°, low 47°.

Pressure30.27 inHg

Wind7.6 mph S

Humidity65%

Visibility6.2 mi

Dew point47°

Tue, 2069° / 48°

69 °

River Sioux, Tuesday, 20 October

Mostly clear. High 69°, low 48°.

Pressure30.27 inHg

Wind9.3 mph S

Humidity58%

Visibility6.2 mi

Dew point48°

Wed, 2172° / 54°

0.02

72 °

River Sioux, Wednesday, 21 October

Light rain. High 72°, low 54°.

Pressure30.18 inHg

Wind8.5 mph S

Humidity63%

Visibility6.2 mi

Dew point53°

Thu, 2274° / 53°

74 °

River Sioux, Thursday, 22 October

Mostly clear. High 74°, low 53°.

Pressure30.21 inHg

Wind10.4 mph S

Humidity51%

Visibility—

Dew point50°

Fri, 2373° / 57°

73 °

River Sioux, Friday, 23 October

Overcast. High 73°, low 57°.

Pressure30.06 inHg

Wind18.2 mph S

Humidity50%

Visibility—

Dew point49°

Sat, 2467° / 52°

67 °

River Sioux, Saturday, 24 October

Light rain. High 67°, low 52°.

Pressure30.18 inHg

Wind18.2 mph S

Humidity51%

Visibility—

Dew point46°

Sun, 2557° / 42°

57 °

River Sioux, Sunday, 25 October

Partly cloudy. High 57°, low 42°.

Pressure30.53 inHg

Wind9.8 mph NW

Humidity36%

Visibility—

Dew point26°

Mon, 2654° / 43°

0.09

54 °

River Sioux, Monday, 26 October

Light rain. High 54°, low 43°.

Pressure30.21 inHg

Wind14.1 mph S

Humidity66%

Visibility—

Dew point41°

Tue, 2766° / 53°

66 °

River Sioux, Tuesday, 27 October

Overcast. High 66°, low 53°.

Pressure30.03 inHg

Wind12.5 mph S

Humidity67%

Visibility—

Dew point53°

Wed, 2868° / 57°

0.33

68 °

River Sioux, Wednesday, 28 October

Rain. High 68°, low 57°.

Pressure29.83 inHg

Wind13.2 mph S

Humidity83%

Visibility—

Dew point57°

Thu, 2970° / 53°

70 °

River Sioux, Thursday, 29 October

Partly cloudy. High 70°, low 53°.

Pressure29.77 inHg

Wind5.5 mph NW

Humidity64%

Visibility—

Dew point53°

Fri, 3072° / 53°

72 °

River Sioux, Friday, 30 October

Overcast. High 72°, low 53°.

Pressure29.59 inHg

Wind15.4 mph SW

Humidity42%

Visibility—

Dew point44°

Sat, 3173° / 53°

73 °

River Sioux, Saturday, 31 October

Partly cloudy. High 73°, low 53°.

Pressure29.65 inHg

Wind13 mph SW

Humidity34%

Visibility—

Dew point37°

Sun, 0175° / 54°

75 °

River Sioux, Sunday, 1 November

Overcast. High 75°, low 54°.

Pressure29.85 inHg

Wind7.3 mph S

Humidity24%

Visibility—

Dew point31°

Mon, 0267° / 50°

67 °

River Sioux, Monday, 2 November

Clear. High 67°, low 50°.

Pressure30.24 inHg

Wind11.9 mph SE

Humidity31%

Visibility—

Dew point32°

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.