Monthly weather forecast and climate
Sioux City, IA

What is the coldest month in Sioux City?

January is the coldest month, with an average high-temperature of 30.6°F (-0.8°C) and an average low-temperature of 10.2°F (-12.1°C).

How many days does it rain in Sioux City?

Throughout the year, in Sioux City, there are 100.9 rainfall days, and 27.7" (704.5mm) of precipitation is accumulated.

What is the driest month in Sioux City?

The month with the least rainfall in Sioux City, Iowa, is January when the rain falls for 6.3 days and typically collects 0.6" (15.7mm) of precipitation.

When does it snow in Sioux City?

January through April, October through December are months with snowfall.

How much does it snow in Sioux City?

Throughout the year, there are 25.5 snowfall days, and 34.8" (883.9mm) of snow is accumulated.

What is the rainiest month in Sioux City?

June is the month with the most rainfall. Rain falls for 10.9 days and accumulates 3.9" (98.8mm) of precipitation.

What is the warmest month in Sioux City?

With an average high-temperature of 85.5°F (29.7°C) and an average low-temperature of 63.1°F (17.3°C), July is the warmest month in Sioux City, Iowa.

What is the snowiest month in Sioux City?

The month with the most snowfall is December when snow falls for 5.7 days and typically aggregates up to 7.8" (198.1mm) of snow.
Average temperature - Sioux City, IA
Average humidity - Sioux City, IA

The month with the highest relative humidity is December (75.9%).
The month with the lowest relative humidity is April (61.6%).

Average rainfall - Sioux City, IA
Average rainfall days - Sioux City, IA

The month with the highest number of rainy days is May (11.3 days).
The month with the lowest number of rainy days is February (6 days).

Average snowfall - Sioux City, IA
Average snowfall days - Sioux City, IA

The month with the highest number of snowfall days is January (5.9 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine - Sioux City, IA
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