August weather forecast
Pasadena, CA

August in Pasadena sees a further rise in the temperature, continuing the summer trend with 87.1°F (30.6°C) being the highest temperature of the month. The prevailing warm climate and extended daylight hours offer an optimal environment for outdoor enthusiasts and nature lovers. From strolls in the park, picnics under clear skies, or simply basking in the sun, this weather encourages a dynamic lifestyle. While August retains the summer heat, the wind speed sees a slight decline, adding to the heat's intensity. Sunscreen and hats become daily essentials during the long, hot August days.

Temperature

August, marked by an average high-temperature of 87.1°F (30.6°C) and a low-temperature of 64.9°F (18.3°C), is the warmest month.

Heat index

For August, the heat index is appraised at a tropical 89.6°F (32°C). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

In Pasadena, the average relative humidity in August is 49%.

Rainfall

In Pasadena, in August, it is raining for 1.5 days, with typically 0.12" (3mm) of accumulated precipitation. Throughout the year, in Pasadena, there are 50.1 rainfall days, and 8.5" (216mm) of precipitation is accumulated.

Daylight

In Pasadena, 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 7:53 pm. On the last day of August, sunrise is at 6:25 am and sunset at 7:19 pm PDT.

Sunshine

In August, the average sunshine is 12h.

UV index

The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.