What’s the climate like in Sioux City?
The current climate of Sioux City features average monthly temperatures ranging from highs of 30°C during the day to lows of 0°C. The average yearly temperature is around 17°C. At night, temperatures in the colder months average around -10°C and in the warmer months around 18°C.
The highest temperature recorded in Sioux City in recent years was 39°C in September 2023. The lowest daytime temperature recorded was -22°C in February 2021.
On average, Sioux City gets 882 mm of precipitation each year. Of this, about 88 cm is snowfall. For comparison, London gets 701 mm of precipitation each year.
Best time to visit Sioux City?
The best time to visit Sioux City for sunny weather is May through September. During this period, you'll have good temperatures and not too much rain, making it a great time to visit Sioux City. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.
Climate Table of Sioux City
The climate table of Sioux City shows the average temperatures, precipitation, snow, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. max (°C) | 0 | 3 | 9 | 16 | 23 | 30 | 30 | 29 | 26 | 17 | 10 | 2 |
| Temp. min (°C) | -10 | -8 | -2 | 3 | 11 | 17 | 19 | 17 | 13 | 5 | -2 | -7 |
| Precipitation |  |
|
|
|
|
|
|
|
|
|
|
|
| Precipitation (mm) | 15 | 23 | 71 | 91 | 86 | 87 | 107 | 106 | 78 | 133 | 37 | 48 |
| Snow (cm) | 17 | 29 | 9,4 | 9,3 | 0 | 0 | 0 | 0 | 0 | 1,1 | 5,1 | 17 |
| UV Index | 2 | 2 | 3 | 5 | 5 | 5 | 3 | 5 | 3 | 2 | 2 | 1 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 17°C
- Highest temperature: 30°C in June and July
- Lowest temperature: 0°C in January
- Precipitation*: 882 mm per year, averaging 74 mm per month
- Snowfall: 88 cm per year
- Driest months: 15 mm in January, 23 mm in February and 37 mm in November
- Wettest months: 133 mm in October, 107 mm in July and 106 mm in August
*Precipitation is measured as a combination of rain, snow, and hail
Plan your next holiday
Don’t miss the best holiday deals for Sioux City and see what our partners have for you.
Table of Contents
Average Temperature per Month in Sioux City
This graph shows the average maximum temperatures per month in Sioux City, Iowa. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Sioux City
This graph shows how much precipitation Sioux City, Iowa, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average Snowfall per Month in Sioux City
This graph shows how much snow Sioux City, Iowa, gets on average per month. The amount of snowfall is measured in centimetres and the average is calculated based on the recorded snowfall per month from past years.
Average UV Index per Month in Sioux City
This graph shows the average UV index per month in Sioux City, Iowa. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Sioux City
This graph shows the average yearly temperature in Sioux City, Iowa. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Sioux City
This chart shows the total yearly precipitation in Sioux City, Iowa, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in Sioux City
This chart shows the total yearly snowfall in Sioux City, Iowa, over the past few years. The total yearly snowfall, measured in centimetres, is the sum of all the snow that fell in the twelve months of that year.
Weather experiences in Sioux City
Have you been to Sioux City?
Share your weather experiences in Sioux City.
Average Weather in Sioux City by Month
Click on a month below to see detailed weather info for Sioux City. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
