July weather forecastDes Moines, WA

July

Weather in July

July is a warm summer month in Des Moines, Washington, with an average temperature varying between 77.2°F (25.1°C) and 52.5°F (11.4°C).

Temperature

July's arrival signals a subtle increase in average high-temperatures, moving from June's agreeable 70°F (21.1°C) to a moderately hot 77.2°F (25.1°C). Des Moines endures a clear shift from daytime heat to a mean low-temperature of 52.5°F (11.4°C) during July nights.

Humidity

The least humid month in Des Moines is July, with an average relative humidity of 68%.

Rainfall

July is the month with the least rainfall in Des Moines. Rain falls for 6.3 days and accumulates 0.31" (8mm) of precipitation.

Snowfall

April through October are months without snowfall.

Ocean temperature

In Des Moines, in July, the average water temperature is 51.3°F (10.7°C).
Note: Diving into 51.3°F (10.7°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

The average length of the day in July in Des Moines is 15h and 30min.
On the first day of July, sunrise is at 5:17 am and sunset at 9:09 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:43 pm PDT.

Sunshine

In July, the average sunshine in Des Moines is 10.5h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index, 5 during July, leads to the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.

Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Des Moines, 77.2°F (25.1°C) is the average high-temperature and 52.5°F (11.4°C) is the average low-temperature during July.

July is the least humid month in Des Moines, with an average relative humidity of 68%.

In July, the average relative humidity in Des Moines is 68%.

July is the month with the least rainfall in Des Moines, Washington. Rain falls for 6.3 days and accumulates 0.31" (8mm) of precipitation.

In Des Moines, in July, during 6.3 rainfall days, 0.31" (8mm) of precipitation is typically accumulated.

In Des Moines, Washington, snow does not fall in April through October.

In July, the average ocean temperature in Des Moines is 51.3°F (10.7°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

In Des Moines, the average day length in July is 15h and 30min.

In July, on the first day of the month, sunrise is at 5:17 am and sunset at 9:09 pm. On the last day of the month, in Des Moines, sunrise is at 5:47 am and sunset at 8:43 pm PDT.

In July, the average sunshine duration in Des Moines, Washington, is 10.5h.

The months with the highest UV index are June through August, with an average maximum UV index of 5.

In July, the average daily maximum UV index in Des Moines is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J July A S O N D

Jun

July

Aug

Average high temperature

70°F

77.2°F

77.7°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

4.5mph

4.1mph

4mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

10.5

6.3

5.7

Average snowfall

Average snowfall days

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

17.1

22.6

22.8

Average UV index

Average cloud cover

Average visibility

Average temperature in July
Des Moines, WA

Average high temperature in July: 77.2°F

The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (43.5°F).

Average low temperature in July: 52.5°F

The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).

Average pressure in July
Des Moines, WA

Average pressure in July: 30.03"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

Average wind speed in July
Des Moines, WA

Average wind speed in July: 3.6mph

The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are July and August (3.6mph).

Average humidity in July
Des Moines, WA

Average humidity in July: 68%

The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (68%).

Average rainfall in July
Des Moines, WA

Average rainfall in July: 0.31"

The wettest month (with the highest rainfall) is December (2.2").
The driest month (with the least rainfall) is July (0.31").

Average rainfall days in July
Des Moines, WA

Average rainfall days in July: 6.3 days

The month with the highest number of rainy days is April (14.9 days).
The month with the least rainy days is August (5.7 days).

Average snowfall in July
Des Moines, WA

Average snowfall in July: 0"

The month with the highest snowfall is February (2.52").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in July
Des Moines, WA

Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in July
Des Moines, WA

Average sea temperature in July: 51.2°F

The best month for swimming (with the highest average sea temperature) is August (53.7°F).
The coldest month (with the lowest average sea temperature) is February (45.8°F).

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

Average daylight in July: 15h and 30min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

Average sunshine in July: 10h and 30min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

Average sunshine days in July
Des Moines, WA

Average sunshine days in July: 22.6 days

The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (13 days).

Average UV index in July
Des Moines, WA

Average UV index in July: 5

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in July
Des Moines, WA

Average cloud cover in July: 28

The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).

Average visibility in July
Des Moines, WA

Average visibility in July: 6mi

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).