July weather forecast
Des Moines, IA

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City buildings in Des Moines, Iowa
City buildings in Des Moines, Iowa

Weather in July

July, often considered the peak of summer in Des Moines, is characterized by the greatest warmth and longest daylight hours of the year. Thundery showers sporadically balance out the generally high temperature. Despite the tropical nature of the month, a dip in wind gusts provides some respite from the heat. The warmest temperatures are reflected this month, with figures from 65.5°F (18.6°C) to 83.1°F (28.4°C). The weather exudes possible beach visits and alfresco dining, attracting both locals and tourists.

Temperature

Des Moines's July weather, marked by an average high temperature of 83.1°F (28.4°C) and an average low temperature of 65.5°F (18.6°C), is the warmest in the year.

Heat index

The heat index value for July is computed to be a hot 91.4°F (33°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.

Humidity

In Des Moines, the average relative humidity in July is 81%.

Rainfall

In Des Moines, Iowa, in July, it is raining for 12.9 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, there are 114.4 rainfall days, and 16.38" (416mm) of precipitation is accumulated.

Snowfall

In Des Moines, snow does not fall in June through September.

Daylight

In Des Moines, the average length of the day in July is 14h and 50min.
On the first day of July in Des Moines, sunrise is at 5:44 am and sunset at 8:52 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 8:32 pm CDT.

Sunshine

July has the most sunshine of the year in Des Moines, with an average of 10.3h of sunshine.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Des Moines. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In July, the maximum UV index of 6 suggests this advice:
Shield from overexposure. Defense against sun-related harm is required. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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Frequently asked questions

What is the hottest time of year in Des Moines?

Des Moines's July weather, with an average high temperature of 83.1°F (28.4°C) and an average low temperature of 65.5°F (18.6°C), tends to be the warmest of the year.

How hot is it in Des Moines in July?

The high-temperature, in July, in Des Moines, is 83.1°F (28.4°C), while the low-temperature averages to 65.5°F (18.6°C). In July, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is computed to be 91.4°F (33°C).

What is the average humidity in July in Des Moines?

In Des Moines, the average relative humidity in July is 81%.

How much does it rain in Des Moines in July?

In Des Moines, in July, during 12.9 rainfall days, 1.5" (38mm) of precipitation is typically accumulated.

When it does not snow in Des Moines?

June through September are months without snowfall in Des Moines.

How many hours of daylight does Des Moines have in July?

The average day length in July in Des Moines is 14h and 50min.

When are sunrise and sunset in July in Des Moines?

On the first day of July in Des Moines, sunrise is at 5:44 am and sunset at 8:52 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 8:32 pm CDT.

What month has the most sunshine in Des Moines?

With an average of 10.3h of sunshine, July has the most sunshine of the year.

How many hours of sunshine does Des Moines have in July?

In Des Moines, the average sunshine duration in July is 10.3h.

What are the months with the highest UV index in Des Moines?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index intensity in July in Des Moines?

The average daily maximum UV index in July in Des Moines, Iowa, is 6. A UV Index estimate of 6 to 7 represents a high hazard to health 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 July
Des Moines, IA

Average temperature in July - Des Moines, IA
  • Average high temperature in July: 83.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in July: 65.5°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).

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Average pressure in July
Des Moines, IA

Average pressure in July - Des Moines, IA
  • Average pressure in July: 29.96"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in July
Des Moines, IA

Average wind speed in July - Des Moines, IA
  • Average wind speed in July: 7mph

The windiest months (with the highest average wind speed) are January, February, March and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average humidity in July
Des Moines, IA

Average humidity in July - Des Moines, IA
  • Average humidity in July: 81%

The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in July
Des Moines, IA

Average rainfall in July - Des Moines, IA
  • Average rainfall in July: 1.5"

The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in July
Des Moines, IA

Average rainfall days in July - Des Moines, IA
  • Average rainfall days in July: 12.9 days

The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (3 days).

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Average snowfall in July
Des Moines, IA

Average snowfall in July - Des Moines, IA
  • Average snowfall in July: 0"

The month with the highest snowfall is January (2.24").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in July
Des Moines, IA

Average snowfall days in July - Des Moines, IA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in July /
Average sunshine in July
Des Moines, IA

Average daylight in July / Average sunshine in July - Des Moines, IA
  • Average daylight in July: 14h and 5min

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

  • Average sunshine in July: 10h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

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Average sunshine days in July
Des Moines, IA

Average sunshine days in July - Des Moines, IA
  • Average sunshine days in July: 15.5 days

The month with the most sunshine days is December (22.3 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index in July
Des Moines, IA

Average UV index in July - Des Moines, IA
  • Average UV index in July: 6

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

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Average cloud cover in July
Des Moines, IA

Average cloud cover in July - Des Moines, IA
  • Average cloud cover in July: 29

The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and September (Cloud cover 29).

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Average visibility in July
Des Moines, IA

Average visibility in July - Des Moines, IA
  • Average visibility in July: 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).

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Des Moines, Iowa, USA

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