December weather forecast
Riyadh, Saudi Arabia

December exhibits the traditional winter weather of Riyadh, with temperatures hovering between 10.6°C (51.1°F) and 22.2°C (72°F). Diminishing daylight hours and a low UV index of 5 characterize the city's transition into its coldest period. This month brings a nostalgic reminder of the winter's start in January, creating a cyclical sense in the city's climatic rhythm. Precipitation inches upward to 15mm (0.59") over 6.3 days, marking December as one of the wetter months. However, it's the relative increase in rainfall rather than the absolute amount that highlights December in Riyadh's climate chronicles.

Temperature

In Riyadh, the average high-temperature in December drops from a warm 27.8°C (82°F) in November to an agreeable 22.2°C (72°F). In December, the recorded average low-temperature is a cool 10.6°C (51.1°F).

Humidity

January and December, with an average relative humidity of 47%, are the most humid months.

Rainfall

In Riyadh, in December, during 6.3 rainfall days, 15mm (0.59") of precipitation is typically accumulated. In Riyadh, during the entire year, the rain falls for 44.8 days and collects up to 93mm (3.66") of precipitation.

Daylight

December has the shortest days of the year, with an average of 10h and 36min of daylight.
On the first day of December, sunrise is at 06:20 and sunset at 17:03. On the last day of the month, sunrise is at 06:37 and sunset at 17:15 +03.

Sunshine

The months with the least sunshine in Riyadh are January and December, with an average of 6.9h of sunshine.

UV index

December is the month with the lowest UV index in Riyadh, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the UV index of 5 transforms into the following advice:
Ensure safety - Recommendations to avert sunburn are presented. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays.