August weather forecast
Hermosillo, Mexico

August in Hermosillo continues July's trend of high temperatures, accompanied by noticeable rainfall. Despite the heat and rain, Hermosillo's long hours of daylight persist, with twilight illuminating the city well into the evening. The city maintains its distinct summer charm, despite the onset of cooler nights. High humidity levels and sporadic rainfall in August introduce a different facet to Hermosillo's usually dry weather.

Temperature

August reports an average high-temperature of a still very hot 37.3°C (99.1°F), matching the temperature of July. Hermosillo sees an average low-temperature of 28.1°C (82.6°F) during August.

Heat index

August's mean heat index is calculated to be a life-threatening hot 47°C (116.6°F). Precaution: Heat cramps along with heat exhaustion are possible. Heatstroke is a serious risk with continued exertion.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

August is the most humid month in Hermosillo, with an average relative humidity of 50%.

Rainfall

August is the month with the most rainfall in Hermosillo. Rain falls for 17.3 days and accumulates 67mm (2.64") of precipitation.

Daylight

The average length of the day in August in Hermosillo is 13h and 9min.
On the first day of August in Hermosillo, sunrise is at 5:45 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 6:46 pm MST.

Sunshine

The average sunshine in August is 11.7h.

UV index

May through September, with an average maximum UV index of 8, are months with the highest UV index in Hermosillo. A UV Index estimate of 8 to 10 represents a very high threat to health from unsafe exposure to UV radiation for average individuals.
Note: A maximum high UV index of 8 in August translates into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.