Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
July
Weather in July
Temperature
Mount Vernon witnesses its highest temperatures in July and August, reaching an average of 68.4°F (20.2°C).Humidity
With an average relative humidity of 75%, July is the least humid month.Rainfall
The month with the least rainfall is July, when the rain falls for 7.9 days and typically collects 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 July, sunrise is at 5:12 am and sunset at 9:14 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:47 pm PDT.
Sunshine
The months with the most sunshine are July and August, with an average of 10.4h of sunshine.UV index
July is the month with the highest UV index, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: An average maximum UV index of 5 in July leads to these recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the warmest month?
What are the temperatures in July?
What is the least humid month?
What is the average humidity in July?
What is the driest month?
How many days does it rain in July?
When it does not snow?
What is the average length of the day in July?
What time are sunrise and sunset in July?
What are the months with the most sunshine?
How long on average sun shines in July?
What is the month with the highest UV index?
What is the UV index intensity in July?
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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).