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
Rosemead's temperature records reveal August as the warmest month, marked by average highs of 87.4°F (30.8°C) and lows of 64.9°F (18.3°C).Heat index
The heat index value for August is evaluated at a hot 89.6°F (32°C). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', integrates the air's temperature and its humidity to showcase the felt temperature by people. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
The average relative humidity in August is 51%.Rainfall
In Rosemead, in August, during 1.8 rainfall days, 0.08" (2mm) of precipitation is typically accumulated. In Rosemead, during the entire year, the rain falls for 43 days and collects up to 6.06" (154mm) of precipitation.Daylight
The average length of the day in August is 13h and 23min.On the first day of the month, sunrise is at 6:04 am and sunset at 7:52 pm. On the last day of August, sunrise is at 6:25 am and sunset at 7:18 pm PDT.
Sunshine
In Rosemead, 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 value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 6 in August leads to these guidelines:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest in Rosemead?
Is it hot during August?
What is the average humidity in August?
How many days does it rain in August?
What is the average length of the day in August?
When is the sunrise / sunset in August?
How long on average sun shines in August?
When is the highest UV index?
What is the UV index intensity in August?
Average temperature in August
Rosemead, CA
- Average high temperature in August: 87.4°F
The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is December (63.5°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 December (47.5°F).
Average pressure in August
Rosemead, 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
Rosemead, CA
- Average wind speed in August: 4.6mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest months (with the lowest average wind speed) are September and October (4.5mph).
Average humidity in August
Rosemead, CA
- Average humidity in August: 51%
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).
Average rainfall in August
Rosemead, CA
- Average rainfall in August: 0.08"
The wettest month (with the highest rainfall) is February (1.3").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in August
Rosemead, CA
- Average rainfall days in August: 1.8 days
The month with the highest number of rainy days is March (5.5 days).
The month with the least rainy days is June (1.2 days).
Average daylight in August /
Average sunshine in August
Rosemead, 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 month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days in August
Rosemead, CA
- Average sunshine days in August: 27 days
The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is February (22.2 days).
Average UV index in August
Rosemead, 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
Rosemead, CA
- Average cloud cover in August: 5
The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in August
Rosemead, 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).
Rosemead, California, USA
Weather forecast for your location
2. Allow the app to use your location