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, recognised by an average high temperature of 82.9°F (28.3°C) and a low of 47.5°F (8.6°C), is Portola's warmest month.Heat index
During July, the heat index is calculated to be 82.4°F (28°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
The months with the lowest humidity are July and August, with an average relative humidity of 40%.Rainfall
In July, the rain falls for 3.3 days. Throughout July, 0.24" (6mm) of precipitation is accumulated. Throughout the year, in Portola, there are 80.1 rainfall days, and 22.95" (583mm) of precipitation is accumulated.Snowfall
In Portola, snow does not fall in July and August.Daylight
In July, the average length of the day is 14h and 40min.On the first day of July in Portola, sunrise is at 5:37 am and sunset at 8:34 pm. On the last day of the month, 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 of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 5 in July transforms into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Frequently asked questions
What part of the year is the hottest in Portola?
Is it hot in Portola during July?
What are the least humid months in Portola?
What is the average humidity in July in Portola?
How much does it rain in Portola in July?
When it does not snow in Portola?
Does it snow in Portola in July?
What is the average length of the day in July in Portola?
When is the sunrise / sunset in July in Portola?
What month has the most sunshine in Portola?
How long on average sun shines in July in Portola?
When is the highest UV index in Portola?
How high is the UV index in July in Portola?
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
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