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 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
August is Fullerton's warmest month, registering average high temperatures of 83.5°F (28.6°C) and lows of 65.5°F (18.6°C).Heat index
For most parts of August, the heat index is evaluated at a hot 86°F (30°C). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Humidity
In Fullerton, the average relative humidity in August is 59%.Rainfall
In Fullerton, in August, during 2.2 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. Throughout the year, there are 52.5 rainfall days, and 7.09" (180mm) of precipitation is accumulated.Daylight
In August, the average length of the day is 13h and 22min.On the first day of August, sunrise is at 6:04 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:18 pm PDT.
Sunshine
The months with the most sunshine are July and August, with an average of 12h of sunshine.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 6 in August transforms into the following instructions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. 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 time of the year is the hottest?
Is it hot during August?
What is the average humidity in August?
How much does it rain in Fullerton in August?
How many hours of daylight does Fullerton have in August?
When are sunrise and sunset in August?
What is the month with the most sunshine?
How long on average sun shines in August?
What is the month with the highest UV index?
What is the UV index intensity in August?
Average temperature in August
Fullerton, CA
- Average high temperature in August: 83.5°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in August: 65.5°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).
Average pressure in August
Fullerton, CA
- Average pressure in August: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in August
Fullerton, CA
- Average wind speed in August: 4.8mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest months (with the lowest average wind speed) are September and October (4.7mph).
Average humidity in August
Fullerton, CA
- Average humidity in August: 59%
The month with the highest relative humidity is June (65%).
The month with the lowest relative humidity is November (51%).
Average rainfall in August
Fullerton, CA
- Average rainfall in August: 0.2"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in August
Fullerton, CA
- Average rainfall days in August: 2.2 days
The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.5 days).
Average daylight in August /
Average sunshine in August
Fullerton, CA
- Average daylight in August: 13h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in August: 12h and 0min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in August
Fullerton, CA
- Average sunshine days in August: 25.8 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is February (20.6 days).
Average UV index in August
Fullerton, CA
- Average UV index in August: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in August
Fullerton, CA
- Average cloud cover in August: 5
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in August
Fullerton, CA
- Average visibility in August: 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).
Fullerton, California, USA
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