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
Altadena registers the highest average temperatures during the month of August, with peaks of 86.2°F (30.1°C) and lows of 64.4°F (18°C).Heat index
The average heat index in August is estimated at a hot 87.8°F (31°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.When assessing, remember that heat index measurements are for light winds and shaded spots. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly 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 Altadena, California, the average relative humidity in August is 48%.Rainfall
In Altadena, in August, during 2.3 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. Throughout the year, in Altadena, there are 52 rainfall days, and 8.82" (224mm) of precipitation is accumulated.Daylight
The average length of the day in August in Altadena is 13h and 23min.On the first day of August in Altadena, sunrise is at 6:04 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:19 pm PDT.
Sunshine
In Altadena, the average sunshine in August is 12h.UV index
The months with the highest UV index in Altadena, California, are June through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 6 during August translates into these guidelines:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Frequently asked questions
What are the warmest months in Altadena?
How hot does it get in Altadena in August?
What is the average humidity in August in Altadena?
How much does it rain in Altadena in August?
What is the average length of the day in August in Altadena?
What time are sunrise and sunset in August in Altadena?
How long on average sun shines in August in Altadena?
What is the month with the highest UV index in Altadena?
What is the UV index intensity in August in Altadena?
Average temperature in August
Altadena, CA
- Average high temperature in August: 86.2°F
The warmest month (with the highest average high temperature) is August (86.2°F).
The month with the lowest average high temperature is December (61°F).
- Average low temperature in August: 64.4°F
The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).
Average pressure in August
Altadena, CA
- Average pressure in August: 29.89"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in August
Altadena, CA
- Average wind speed in August: 4.6mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in August
Altadena, CA
- Average humidity in August: 48%
The months with the highest relative humidity are March, May and June (56%).
The month with the lowest relative humidity is November (46%).
Average rainfall in August
Altadena, CA
- Average rainfall in August: 0.16"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in August
Altadena, CA
- Average rainfall days in August: 2.3 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.3 days).
Average daylight in August /
Average sunshine in August
Altadena, 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 February and December (Average sunshine: 6h and 54min).
Average sunshine days in August
Altadena, CA
- Average sunshine days in August: 26.2 days
The month with the most sunshine days is June (27.2 days).
The month with the least sunshine days is February (21.3 days).
Average UV index in August
Altadena, 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
Altadena, CA
- Average cloud cover in August: 5
The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in August
Altadena, 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).
Altadena, California, USA
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