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 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
Winnetka reaches its highest average temperatures in August, measuring 85.6°F (29.8°C) at the peak and 64.8°F (18.2°C) at the lowest.Heat index
The heat index for August is estimated at a tropical 87.8°F (31°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.Heat index determinations are made taking into account the shade and light air movements. 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 'apparent temperature' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. 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 remain especially vital for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
The average relative humidity in August is 52%.Rainfall
In Winnetka, in August, it is raining for 1.5 days, with typically 0.08" (2mm) of accumulated precipitation. Throughout the year, in Winnetka, there are 42.7 rainfall days, and 6.46" (164mm) of precipitation is accumulated.Snowfall
January through November are months without snowfall in Winnetka.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 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 exposure to the Sun's UV rays for ordinary individuals.Note: An average UV index of 6 in August transforms into this advice:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Frequently asked questions
What are the warmest months in Winnetka?
How hot is it in Winnetka in August?
What is the average humidity in August in Winnetka?
How much does it rain in Winnetka in August?
When it does not snow in Winnetka?
What is the average length of the day in August in Winnetka?
When are sunrise and sunset in August in Winnetka?
How many hours of sunshine does Winnetka have in August?
What are the months with the highest UV index in Winnetka?
How high is the UV index in August in Winnetka?
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 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 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).
Winnetka, California, USA
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