August weather forecastWestmont, CA
August
Weather in August
August, the last month of the summer in Westmont, is another warm month, with an average temperature ranging between max 80.2°F (26.8°C) and min 64.9°F (18.3°C).Temperature
August is the month when Westmont's temperatures reach their peak, with averages of 80.2°F (26.8°C) and lows of 64.9°F (18.3°C).Humidity
The average relative humidity in August is 65%.Rainfall
In August, the rain falls for 2.5 days. Throughout August, 0.16" (4mm) of precipitation is accumulated. Throughout the year, there are 47.6 rainfall days, and 7.24" (184mm) of precipitation is accumulated.Daylight
In August, the average length of the day is 13h and 23min.On the first day of the month, sunrise is at 6:05 am and sunset at 7:53 pm. On the last day of August, in Westmont, sunrise is at 6:26 am and sunset at 7:19 pm PDT.
Sunshine
July and August, with an average of 11.9h of sunshine, are months with the most sunshine.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index in Westmont. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In August, a daily UV index of 6 turns into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Westmont, CA
- Average high temperature in August: 80.2°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in August: 64.9°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (51.1°F).
Average pressure in August
Westmont, CA
- Average pressure in August: 29.9"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in August
Westmont, CA
- Average wind speed in August: 5mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is September (4.9mph).
Average humidity in August
Westmont, CA
- Average humidity in August: 65%
The month with the highest relative humidity is June (70%).
The month with the lowest relative humidity is November (54%).
Average rainfall in August
Westmont, CA
- Average rainfall in August: 0.16"
The wettest month (with the highest rainfall) is January (1.42").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in August
Westmont, CA
- Average rainfall days in August: 2.5 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.7 days).
Average daylight in August /
Average sunshine in August
Westmont, 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: 11h and 54min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in August
Westmont, CA
- Average sunshine days in August: 25.4 days
The month with the most sunshine days is October (25.5 days).
The month with the least sunshine days is June (21.4 days).
Average UV index in August
Westmont, 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
Westmont, CA
- Average cloud cover in August: 7
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 7).
Average visibility in August
Westmont, 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).
