December weather forecast
Mecca, Saudi Arabia

December brings with it the mild and pleasant winter weather that Mecca, Saudi Arabia is known for. The city features cooler nights and warm days with low humidity levels. The longer nights and low UV index present a contrast to the harsh summer months. With December's onset, the city bids farewell to the year, awaiting another cycle of seasonal changes.

Temperature

With the arrival of December, Mecca notices a mild change in the average high-temperature, sliding from November's torrid 35.2°C (95.4°F) to a tropical 32°C (89.6°F). Mecca witnesses a consistent average low-temperature of 20.3°C (68.5°F) throughout December.

Heat index

The heat index value for December is estimated at a sweltering 37°C (98.6°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

With an average relative humidity of 59%, December is the most humid month in Mecca.

Rainfall

In December, the rain falls for 3.6 days. Throughout December, 22mm (0.87") of precipitation is accumulated. Throughout the year, in Mecca, Saudi Arabia, there are 22.4 rainfall days, and 112mm (4.41") of precipitation is accumulated.

Daylight

The month with the shortest days in Mecca, Saudi Arabia, is December, with an average of 10h and 54min of daylight.
On the first day of the month, sunrise is at 06:41 and sunset at 17:37. On the last day of December, in Mecca, sunrise is at 06:58 and sunset at 17:49 +03.

Sunshine

December has the least sunshine of the year in Mecca, Saudi Arabia, with an average of 8h of sunshine.

UV index

The months with the lowest UV index in Mecca are January and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 in December converts into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Boost your sun resistance with garments that are densely woven yet spacious.