October welcomes relatively cooler and comfortable weather conditions to
Dhahran. The drop in daytime temperatures signals the onset of the city’s cooling period. A significant decrease in temperature creates a much more agreeable climate compared to the harsh summer months. The insignificant amount of rainfall remains static, and the desert continues to be dry and arid. As October gives way to
November, one can anticipate further lowering of temperatures and an increase in general comfort levels.
Temperature
October is characterized by a slight reduction in average high-temperature, easing from a scorching 40.3°C (104.5°F) in
September to a very hot 35.6°C (96.1°F). Dhahran in October observes a substantial swing from the daily highs, with average nighttime temperatures of 22°C (71.6°F).
Heat index
The heat index value during October is evaluated at a blazing hot 47°C (116.6°F).
Forewarned: Heat cramps and heat exhaustion are anticipated. Ongoing physical activity increases the likelihood of heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are largely significant for babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.
Humidity
In Dhahran, the average relative humidity in October is 60%.
Rainfall
Months with rainfall are
January through
May, October through
December. October is the first month it rains. Throughout October, in the average 0.6 rainfall days, it receives 0mm (0") of precipitation. Throughout the year, there are 62.7 rainfall days, and 108mm (4.25") of precipitation is accumulated.
Daylight
In Dhahran, the average length of the day in October is 11h and 32min.
On the first day of October, sunrise is at 05:32 and sunset at 17:26. On the last day of the month, sunrise is at 05:48 and sunset at 16:58 +03.