June weather forecast
Sioux City, IA

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Panorama of the vast Sioux City, Iowa
Panorama of the vast Sioux City, Iowa

Weather in June

June presents Sioux City with the official start of summer, evident in the longer days and the increase in average high temperatures. Riverside dips become a regular activity, as the UV index hits a year-long high of 6. Despite seeing the highest level of rainfall for the year at 1.85" (47mm), this month mostly brings with it the promise of brighter and sunnier days. Locals and visitors alike spend their time outdoors, making the most of the weather. The significant increase in sunshine hours, reaching up to 15.3 hours per day, provides ample opportunities for outdoor adventures and recreational activities.

Temperature

June signals a shift in the average high-temperature, moving from May's agreeable 70°F (21.1°C) to a warm 80.1°F (26.7°C). During the month of June, the nighttime temperature falls to an average of 62.6°F (17°C).

Humidity

In June, the average relative humidity is 75%.

Rainfall

June is the month with the most rainfall in Sioux City. Rain falls for 14.6 days and accumulates 1.85" (47mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

June has the longest days of the year, with an average of 15h and 12min of daylight.
On the first day of the month, sunrise is at 5:50 am and sunset at 8:56 pm. On the last day of June, sunrise is at 5:51 am and sunset at 9:06 pm CDT.

Sunshine

The average sunshine in June is 10.1h.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 6 in June interprets into the following advice:
Resist overexposure. Safeguarding from solar damage is indispensable. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Updated: Jun 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Sioux City in June?

The high-temperature, in June, in Sioux City, records 80.1°F (26.7°C), while the low-temperature is 62.6°F (17°C).

What is the average humidity in June?

In Sioux City, the average relative humidity in June is 75%.

What is the rainiest month?

The month with the most rainfall is June, when the rain falls for 14.6 days and typically aggregates up to 1.85" (47mm) of precipitation.

How much does it rain in June?

In Sioux City, during June, the rain falls for 14.6 days and regularly aggregates up to 1.85" (47mm) of precipitation.

When it does not snow?

In Sioux City, snow does not fall in May through September.

When are the longest days?

June has the longest days of the year, with an average of 15h and 12min of daylight.

How many hours of daylight does Sioux City have in June?

In Sioux City, the average day length in June is 15h and 15min.

When are sunrise and sunset in June?

On the first day of June, sunrise is at 5:50 am and sunset at 8:56 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 9:06 pm CDT.

How long on average sun shines in June?

In June, the average sunshine duration is 10.1h.

When is the highest UV index?

The months with the highest UV index are June and July, with an average maximum UV index of 6.

What is the UV index reading in June?

The average daily maximum UV index in June is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Sioux City, IA

Average temperature in June - Sioux City, IA
  • Average high temperature in June: 80.1°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in June: 62.6°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).

Average pressure in June
Sioux City, IA

Average pressure in June - Sioux City, IA
  • Average pressure in June: 29.86"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed in June
Sioux City, IA

Average wind speed in June - Sioux City, IA
  • Average wind speed in June: 8.7mph

The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).

Average humidity in June
Sioux City, IA

Average humidity in June - Sioux City, IA
  • Average humidity in June: 75%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (65%).

Average rainfall in June
Sioux City, IA

Average rainfall in June - Sioux City, IA
  • Average rainfall in June: 1.85"

The wettest month (with the highest rainfall) is June (1.85").
The driest months (with the least rainfall) are January and February (0.39").

Average rainfall days in June
Sioux City, IA

Average rainfall days in June - Sioux City, IA
  • Average rainfall days in June: 14.6 days

The month with the highest number of rainy days is June (14.6 days).
The month with the least rainy days is January (2.6 days).

Average snowfall in June
Sioux City, IA

Average snowfall in June - Sioux City, IA
  • Average snowfall in June: 0"

The month with the highest snowfall is January (1.77").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in June
Sioux City, IA

Average snowfall days in June - Sioux City, IA
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in June /
Average sunshine in June
Sioux City, IA

Average daylight in June / Average sunshine in June - Sioux City, IA
  • Average daylight in June: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in June: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in June
Sioux City, IA

Average sunshine days in June - Sioux City, IA
  • Average sunshine days in June: 13.1 days

The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is June (13.1 days).

Average UV index in June
Sioux City, IA

Average UV index in June - Sioux City, IA
  • Average UV index in June: 6

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in June
Sioux City, IA

Average cloud cover in June - Sioux City, IA
  • Average cloud cover in June: 31

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 25).

Average visibility in June
Sioux City, IA

Average visibility in June - Sioux City, IA
  • Average visibility in June: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Sioux City, Iowa, USA

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