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
Weather in July
Temperature
July, having an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 47.5°F (8.6°C), is the warmest month.Heat index
July's average heat index is computed to be 82.4°F (28°C). One might feel worn out with persistent exposure and activity, resulting in heat cramps.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
July and August, with an average relative humidity of 40%, are the least humid months.Rainfall
In Portola, in July, it is raining for 3.3 days, with typically 0.24" (6mm) of accumulated precipitation. In Portola, during the entire year, the rain falls for 80.1 days and collects up to 22.95" (583mm) of precipitation.Snowfall
In Portola, snow does not fall in July and August.Daylight
In July, the average length of the day in Portola is 14h and 40min.On the first day of the month, sunrise is at 5:37 am and sunset at 8:34 pm. On the last day of July, sunrise is at 6:00 am and sunset at 8:15 pm PDT.
Sunshine
July has the most sunshine of the year, with an average of 12h of sunshine.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 medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 5 during July leads to these advisories:
Be vigilant - Suggestions to stave off sun damage are provided. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the hottest time of year?
How hot is it in July?
What is the least humid month?
What is the average humidity in July?
How many days does it rain in July?
When it does not snow?
Does it snow in July?
How many hours of daylight does Portola have in July?
When are sunrise and sunset in July?
What month has the most sunshine?
How many hours of sunshine does Portola have in July?
What is the month with the highest UV index?
What is the UV index reading in July?
Average temperature in July
Portola, CA
- Average high temperature in July: 82.9°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (37.2°F).
- Average low temperature in July: 47.5°F
The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is December (21.6°F).
Average pressure in July
Portola, CA
- Average pressure in July: 29.92"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in July
Portola, CA
- Average wind speed in July: 5.3mph
The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5.2mph).
Average humidity in July
Portola, CA
- Average humidity in July: 40%
The months with the highest relative humidity are January and March (81%).
The months with the lowest relative humidity are July and August (40%).
Average rainfall in July
Portola, CA
- Average rainfall in July: 0.24"
The wettest month (with the highest rainfall) is March (4.02").
The driest month (with the least rainfall) is August (0.2").
Average rainfall days in July
Portola, CA
- Average rainfall days in July: 3.3 days
The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is July (3.3 days).
Average snowfall in July
Portola, CA
- Average snowfall in July: 0"
The month with the highest snowfall is December (22.52").
The months with the least snowfall are July and August (0").
Average snowfall days in July
Portola, CA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is March (14.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in July /
Average sunshine in July
Portola, CA
- Average daylight in July: 14h and 4min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in July: 12h
The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is January (Average sunshine: 5h).
Average sunshine days in July
Portola, CA
- Average sunshine days in July: 25.8 days
The month with the most sunshine days is August (26 days).
The month with the least sunshine days is March (11.8 days).
Average UV index in July
Portola, CA
- Average UV index in July: 5
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in July
Portola, CA
- Average cloud cover in July: 7
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in July
Portola, CA
- Average visibility in July: 6mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
Portola, California, USA
Weather forecast for your location
2. Allow the app to use your location