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 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
Weather in July
Temperature
Vacaville's July weather, with an average high temperature of 91°F (32.8°C) and an average low temperature of 57.7°F (14.3°C), tends to be the warmest of the year.Heat index
In July, the average heat index is appraised at a torrid 96.8°F (36°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.For clarity, heat index numbers account for light winds and areas under shade. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.
Humidity
In July, the average relative humidity is 51%.Rainfall
July through September are months with the least rain in Vacaville, California, when the rain falls for 1.1 days and typically aggregates up to 0.04" (1mm) of rain.Daylight
In July, the average length of the day in Vacaville is 14h and 32min.On the first day of July in Vacaville, sunrise is at 5:48 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 8:18 pm PDT.
Sunshine
The month with the most sunshine is July, with an average of 12.1h of sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Vacaville. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In July, an average UV index of 6 transforms into the following instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the warmest month in Vacaville?
How hot is it in Vacaville in July?
What is the average humidity in July in Vacaville?
What is the driest month in Vacaville?
How many days does it rain in July in Vacaville?
How many hours of daylight does Vacaville have in July?
What time are sunrise and sunset in July in Vacaville?
What month has the most sunshine in Vacaville?
How long on average sun shines in July in Vacaville?
When is the highest UV index in Vacaville?
How high is the UV index in July in Vacaville?
Average temperature in July
Vacaville, CA
- Average high temperature in July: 91°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (54.7°F).
- Average low temperature in July: 57.7°F
The month with the highest average low temperature is September (58.1°F).
The coldest months (with the lowest average low temperature) are January and December (41.4°F).
Average pressure in July
Vacaville, CA
- Average pressure in July: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in July
Vacaville, CA
- Average wind speed in July: 6.7mph
The windiest months (with the highest average wind speed) are May and June (6.8mph).
The calmest months (with the lowest average wind speed) are January and November (4.7mph).
Average humidity in July
Vacaville, CA
- Average humidity in July: 51%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (48%).
Average rainfall in July
Vacaville, CA
- Average rainfall in July: 0.04"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are July, August and September (0.04").
Average rainfall days in July
Vacaville, CA
- Average rainfall days in July: 1.1 days
The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is August (1 days).
Average daylight in July /
Average sunshine in July
Vacaville, CA
- Average daylight in July: 14h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in July: 12h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in July
Vacaville, CA
- Average sunshine days in July: 29.8 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is February (21.5 days).
Average UV index in July
Vacaville, CA
- Average UV index in July: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in July
Vacaville, CA
- Average cloud cover in July: 5
The months with the most cloud cover are March and December (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in July
Vacaville, CA
- 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).
Vacaville, California, USA
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