August weather forecastWinnetka, CA
August
Weather in August
August, the last month of the summer in Winnetka, is another warm month, with an average temperature fluctuating between 85.6°F (29.8°C) and 64.8°F (18.2°C).Temperature
August, noted for its average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 64.8°F (18.2°C), is considered the warmest month.Heat index
In August, the heat index is calculated to be a hot 87.8°F (31°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.Heat index specifics point out values are for conditions of shade and a slight breeze. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', determines the feeling of heat when you account for the relative humidity. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
The average relative humidity in August is 52%.Rainfall
In August, the rain falls for 1.5 days. Throughout August, 0.08" (2mm) of precipitation is accumulated. Throughout the year, there are 42.7 rainfall days, and 6.46" (164mm) of precipitation is accumulated.Snowfall
January through November are months without snowfall.Daylight
In Winnetka, the average length of the day in August is 13h and 23min.On the first day of the month, sunrise is at 6:05 am and sunset at 7:55 pm. On the last day of August, sunrise is at 6:27 am and sunset at 7:21 pm PDT.
Sunshine
The average sunshine in August in Winnetka is 12h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: In August, a daily UV index of 6 turns into the following recommendations:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Winnetka, CA
- Average high temperature in August: 85.6°F
The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (61.9°F).
- Average low temperature in August: 64.8°F
The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (46.9°F).
Average pressure in August
Winnetka, CA
- Average pressure in August: 29.9"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in August
Winnetka, CA
- Average wind speed in August: 4.6mph
The windiest months (with the highest average wind speed) are January and December (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in August
Winnetka, CA
- Average humidity in August: 52%
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).
Average rainfall in August
Winnetka, CA
- Average rainfall in August: 0.08"
The wettest month (with the highest rainfall) is February (1.22").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in August
Winnetka, CA
- Average rainfall days in August: 1.5 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.4 days).
Average snowfall days in August
Winnetka, CA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in August /
Average sunshine in August
Winnetka, CA
- Average daylight in August: 13h and 24min
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 June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in August
Winnetka, CA
- Average sunshine days in August: 27.3 days
The months with the most sunshine days are August and October (27.3 days).
The month with the least sunshine days is February (22 days).
Average UV index in August
Winnetka, CA
- Average UV index in August: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in August
Winnetka, CA
- Average cloud cover in August: 4
The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in August
Winnetka, 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).
