Riyadh
Saudi Arabia
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Riyadh, Saudi Arabia

A view of the Olaya street metro construction and cars in a traffic jam in the city of Riyadh, Saudi Arabia, viewed from above, at night
A view of the Olaya street metro construction and cars in a traffic jam in the city of Riyadh, Saudi Arabia, viewed from above, at night
The first month of the winter, December, is also an agreeable month in Riyadh, Saudi Arabia, with average temperature fluctuating between 10.6°C (51.1°F) and 22.2°C (72°F).

Temperature

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

Humidity

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

Rainfall

In December, the rain falls for 6.3 days. Throughout December, 14.6mm (0.6") of precipitation is accumulated. In Riyadh, during the entire year, the rain falls for 44.8 days and collects up to 92.5mm (3.6") of precipitation.

Daylight

With an average of 10.6h of daylight, December has the shortest days of the year.

Sunshine

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

UV index

The month with the lowest UV index in Riyadh is December, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for ordinary individuals.
The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Riyadh?

The average high-temperature, in December, in Riyadh, Saudi Arabia, is 22.2°C (72°F), while the average low-temperature is 10.6°C (51.1°F).

What is the most humid month in Riyadh?

Months with the highest humidity in Riyadh, Saudi Arabia, are January and December, with an average relative humidity of 47%.

What is the average humidity in December in Riyadh?

In December, the average relative humidity in Riyadh, Saudi Arabia, is 47%.

How many days does it rain in December in Riyadh?

In Riyadh, during December, the rain falls for 6.3 days and regularly aggregates up to 14.6mm (0.6") of precipitation.

What is the month with the shortest days in Riyadh?

With an average of 10.6h of daylight, December has the shortest days of the year in Riyadh.

How many hours of daylight does Riyadh have in December?

In Riyadh, Saudi Arabia, the average length of the day in December is 10.6h.

What is the month with the least sunshine in Riyadh?

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

How long on average sun shines in December in Riyadh?

The average sunshine in December in Riyadh, Saudi Arabia, is 6.9h.

What is the month with the lowest UV index in Riyadh?

December is the month with the lowest UV index in Riyadh, Saudi Arabia, with an average maximum UV index of 5.

What is the UV index intensity in December in Riyadh?

In December, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Riyadh, Saudi Arabia
  • Average high temperature in December: 22.2°C

The warmest month (with the highest average high temperature) is August (43.6°C).
The month with the lowest average high temperature is January (20.2°C).

  • Average low temperature in December: 10.6°C

The month with the highest average low temperature is July (29.3°C).
The coldest month (with the lowest average low temperature) is January (9°C).

Average humidity in December - Riyadh, Saudi Arabia
  • Average humidity in December: 47%

Months with the highest relative humidity are January and December (47%).
The month with the lowest relative humidity is July (10%).

Average rainfall in December - Riyadh, Saudi Arabia
  • Average rainfall in December: 14.6mm

The wettest month (with the highest rainfall) is April (23.8mm).
Driest months (with the lowest rainfall) are June, July and September (0mm).

Average rainfall days in December - Riyadh, Saudi Arabia
  • Average rainfall days in December: 6.3 days

The month with the highest number of rainy days is April (11.3 days).
Months with the lowest number of rainy days are June and September (0 days).

Average daylight in December / Average sunshine in December - Riyadh, Saudi Arabia
  • Average daylight in December: 10.6h

The month with the longest days is June (Average daylight: 13.7h).
The month with shortest days is December (Average daylight: 10.6h).

  • Average sunshine in December: 6.9h

The month with most sunshine is June (Average sunshine: 10.9h).
Months with least sunshine are January and December (Average sunshine: 6.9).

Average UV index in December - Riyadh, Saudi Arabia
  • Average UV index in December: 5

Months with the highest UV index are April, May, June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 5).