Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Portola's August reports an average high-temperature of a still warm 81.1°F (27.3°C), exhibiting a minor difference from July. Despite a significant daily temperature range, Portola's temperature falls to a steady low-temperature average of 46°F (7.8°C) in August.Heat index
The heat index value during August is calculated to be 80.6°F (27°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Humidity
July and August, with an average relative humidity of 40%, are the least humid months.Rainfall
The month with the least rainfall in Portola is August, when the rain falls for 3.4 days and typically collects 0.2" (5mm) of precipitation.Snowfall
July and August are months without snowfall.Daylight
The average length of the day in August is 13h and 41min.On the first day of the month, sunrise is at 6:01 am and sunset at 8:14 pm. On the last day of August, sunrise is at 6:29 am and sunset at 7:34 pm PDT.
Sunshine
In Portola, the average sunshine in August is 11.8h.UV index
The months with the highest UV index in Portola are June through August, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In August, the maximum UV index of 5 transforms into these recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What are the temperatures in Portola in August?
What are the least humid months in Portola?
What is the average humidity in August in Portola?
What is the driest month in Portola?
How much does it rain in Portola in August?
When it does not snow in Portola?
Does it snow in Portola in August?
What is the average length of the day in August in Portola?
When is the sunrise / sunset in August in Portola?
How many hours of sunshine does Portola have in August?
When is the highest UV index in Portola?
How high is the UV index in August in Portola?
Average temperature in August
Portola, CA
- Average high temperature in August: 81.1°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 August: 46°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 August
Portola, CA
- Average pressure in August: 29.91"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 August
Portola, CA
- Average wind speed in August: 5.2mph
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 August
Portola, CA
- Average humidity in August: 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 August
Portola, CA
- Average rainfall in August: 0.2"
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 August
Portola, CA
- Average rainfall days in August: 3.4 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 August
Portola, CA
- Average snowfall in August: 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 August
Portola, CA
- Average snowfall days in August: 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 August /
Average sunshine in August
Portola, CA
- Average daylight in August: 13h 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 August: 11h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in August
Portola, CA
- Average sunshine days in August: 26 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 August
Portola, CA
- Average UV index in August: 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 August
Portola, CA
- Average cloud cover in August: 8
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 August
Portola, CA
- Average visibility in August: 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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