August weather forecast
Modesto, CA

The last month of the summer, August, is also a fiery hot month in Modesto, California, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 96.4°F (35.8°C).

Temperature

August's arrival brings an average high-temperature of a still fiery hot 96.4°F (35.8°C), slightly deviating from July's 97.7°F (36.5°C). The August nights in Modesto bear witness to a significant drop from the daytime highs, settling at an average temperature of 61.7°F (16.5°C).

Heat index

In August, the heat index is calculated to be a sweltering 102.2°F (39°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

In Modesto, the average relative humidity in August is 40%.

Rainfall

The months with the least rainfall in Modesto, California, are July and August Rain falls for 0.9 days and accumulates 0.04" (1mm) of rain.

Daylight

In August, the average length of the day is 13h and 34min.
On the first day of August, sunrise is at 6:08 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 7:34 pm PDT.

Sunshine

In Modesto, the average sunshine in August is 12h.

UV index

June through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In August, a regular UV index of 7 translates into these guidelines:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.