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
The initiation of August records an average high-temperature of a still moderately hot 81.7°F (27.6°C), displaying a near consistency with the previous month. A sharp divergence from daytime highs is noted during the month of August, with the average nighttime temperature settling at a moderate 56.8°F (13.8°C).Heat index
Throughout August, the heat index is calculated to be 84.2°F (29°C). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.Bear in mind that the heat index values are determined for shaded areas and light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
In August, the average relative humidity is 62%.Rainfall
July and August are months with the least rain when the rain falls for 0.8 days and typically aggregates up to 0.04" (1mm) of rain.Daylight
The average length of the day in August in Walnut Creek is 13h and 35min.On the first day of the month, sunrise is at 6:12 am and sunset at 8:16 pm. On the last day of August, sunrise is at 6:38 am and sunset at 7:38 pm PDT.
Sunshine
In Walnut Creek, the average sunshine in August is 11.9h.UV index
The average daily maximum UV index in August in Walnut Creek is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum high UV index of 5 in August translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Walnut Creek in August?
What is the average humidity in August in Walnut Creek?
What is the driest month in Walnut Creek?
How many days does it rain in August in Walnut Creek?
What is the average length of the day in August in Walnut Creek?
When is the sunrise / sunset in August in Walnut Creek?
How many hours of sunshine does Walnut Creek have in August?
What is the UV index reading in August in Walnut Creek?
Average temperature in August
Walnut Creek, CA
- Average high temperature in August: 81.7°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in August: 56.8°F
The month with the highest average low temperature is September (57.2°F).
The coldest months (with the lowest average low temperature) are January and December (42.4°F).
Average pressure in August
Walnut Creek, CA
- Average pressure in August: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Walnut Creek, CA
- Average wind speed in August: 6.3mph
The windiest month (with the highest average wind speed) is May (7.3mph).
The calmest month (with the lowest average wind speed) is November (4.4mph).
Average humidity in August
Walnut Creek, CA
- Average humidity in August: 62%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (58%).
Average rainfall in August
Walnut Creek, CA
- Average rainfall in August: 0.04"
The wettest month (with the highest rainfall) is February (2.4").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in August
Walnut Creek, CA
- Average rainfall days in August: 0.8 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight in August /
Average sunshine in August
Walnut Creek, CA
- Average daylight in August: 13h and 4min
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 36min).
- 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 December (Average sunshine: 5h and 48min).
Average sunshine days in August
Walnut Creek, CA
- Average sunshine days in August: 29.6 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is March (17.5 days).
Average UV index in August
Walnut Creek, CA
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in August
Walnut Creek, CA
- Average cloud cover in August: 10
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in August
Walnut Creek, 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).
Walnut Creek, California, USA
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