July weather forecast
Mount Vernon, WA

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Weather in July

July is a month of warmth and optimal sunlight in Mount Vernon. This month sees the maximum temperature magnitude of 68.4°F (20.2°C) which is a significant shift from the past months. The prevalence of sunshine becomes more evident - the day enjoys a beautiful stretch of 10.4 hours of sunshine, on average. This bountiful sunshine amount is contrasted by a minimal rainfall of just 0.63" (16mm), making it the driest month of the year. A gradual decline to a light breeze, blowing at an average of 3.9mph (6.3km/h), makes it an ideal weather scenario for outdoor activities.

Temperature

In Mount Vernon, the months of July and August are known for the peak temperatures, reaching an average high of 68.4°F (20.2°C).

Humidity

The least humid month in Mount Vernon is July, with an average relative humidity of 75%.

Rainfall

July is the month with the least rainfall. Rain falls for 7.9 days and accumulates 0.63" (16mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In Mount Vernon, the average length of the day in July is 15h and 38min.
On the first day of the month, sunrise is at 5:12 am and sunset at 9:14 pm. On the last day of July, sunrise is at 5:44 am and sunset at 8:47 pm PDT.

Sunshine

July and August, with an average of 10.4h of sunshine, are months with the most sunshine in Mount Vernon, Washington.

UV index

The month with the highest UV index is July, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum daily UV index of 5 during July morphs into the following directions:
Adopt protective measures - It is advised to guard against sun damage. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the warmest months in Mount Vernon?

Mount Vernon's warmest season falls during July and August, averaging a high-temperature of 68.4°F (20.2°C).

What are the temperatures in Mount Vernon in July?

In July, in Mount Vernon, the average high-temperature is 68.4°F (20.2°C), and the average low-temperature is 52.7°F (11.5°C).

What is the least humid month in Mount Vernon?

With an average relative humidity of 75%, July is the least humid month in Mount Vernon.

What is the average humidity in July in Mount Vernon?

In July, the average relative humidity is 75%.

What is the driest month in Mount Vernon?

July is the month with the least rainfall in Mount Vernon, Washington. Rain falls for 7.9 days and accumulates 0.63" (16mm) of precipitation.

How much does it rain in Mount Vernon in July?

In Mount Vernon, Washington, in July, during 7.9 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

When it does not snow in Mount Vernon?

In Mount Vernon, snow does not fall in May through October.

What is the average length of the day in July in Mount Vernon?

In July, the average day length in Mount Vernon is 15h and 38min.

When is the sunrise / sunset in July in Mount Vernon?

In July, on the first day of the month, sunrise is at 5:12 am and sunset at 9:14 pm. On the last day of the month, in Mount Vernon, Washington, sunrise is at 5:44 am and sunset at 8:47 pm PDT.

What are the months with the most sunshine in Mount Vernon?

July and August, with an average of 10.4h of sunshine, are months with the most sunshine in Mount Vernon.

How many hours of sunshine does Mount Vernon have in July?

The average sunshine duration in July in Mount Vernon, Washington, is 10.4h.

When is the highest UV index in Mount Vernon?

The month with the highest UV index is July, with an average maximum UV index of 5.

What is the UV index intensity in July in Mount Vernon?

In Mount Vernon, Washington, the average daily maximum UV index in July is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
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
Mount Vernon, WA

Average temperature in July - Mount Vernon, WA
  • Average high temperature in July: 68.4°F

The warmest months (with the highest average high temperature) are July and August (68.4°F).
The month with the lowest average high temperature is December (42.6°F).

  • Average low temperature in July: 52.7°F

The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is February (36.1°F).

Average pressure in July
Mount Vernon, WA

Average pressure in July - Mount Vernon, WA
  • Average pressure in July: 30.04"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

Average wind speed in July
Mount Vernon, WA

Average wind speed in July - Mount Vernon, WA
  • Average wind speed in July: 3.9mph

The windiest month (with the highest average wind speed) is November (7.5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

Average humidity in July
Mount Vernon, WA

Average humidity in July - Mount Vernon, WA
  • Average humidity in July: 75%

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is July (75%).

Average rainfall in July
Mount Vernon, WA

Average rainfall in July - Mount Vernon, WA
  • Average rainfall in July: 0.63"

The wettest month (with the highest rainfall) is November (4.96").
The driest month (with the least rainfall) is July (0.63").

Average rainfall days in July
Mount Vernon, WA

Average rainfall days in July - Mount Vernon, WA
  • Average rainfall days in July: 7.9 days

The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (7.2 days).

Average snowfall in July
Mount Vernon, WA

Average snowfall in July - Mount Vernon, WA
  • Average snowfall in July: 0"

The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in July
Mount Vernon, WA

Average snowfall days in July - Mount Vernon, WA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in July /
Average sunshine in July
Mount Vernon, WA

Average daylight in July / Average sunshine in July - Mount Vernon, WA
  • Average daylight in July: 15h and 4min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in July: 10h and 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).

Average sunshine days in July
Mount Vernon, WA

Average sunshine days in July - Mount Vernon, WA
  • Average sunshine days in July: 21.6 days

The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is November (8.1 days).

Average UV index in July
Mount Vernon, WA

Average UV index in July - Mount Vernon, WA
  • Average UV index in July: 5

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

Average cloud cover in July
Mount Vernon, WA

Average cloud cover in July - Mount Vernon, WA
  • Average cloud cover in July: 27

The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).

Average visibility in July
Mount Vernon, WA

Average visibility in July - Mount Vernon, WA
  • 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).

Mount Vernon, Washington, USA

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