Tehran
Iran
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Tehran, Iran

A golden illusion of the front view of the Zaid Mosque in Tehran, Iran, under gray skies
A golden illusion of the front view of the Zaid Mosque in Tehran, Iran, under gray skies
December, the first month of the winter, in Tehran, is also a fresh month, with temperature in the range of an average low of 3.3°C (37.9°F) and an average high of 10.4°C (50.7°F).

Temperature

In December, the average high-temperature drops, from a moderate 15.8°C (60.4°F) in November, to a fresh 10.4°C (50.7°F). The average low-temperature, in Tehran, Iran, is 3.3°C (37.9°F).

Humidity

In Tehran, the average relative humidity is 62%.

Rainfall

In Tehran, Iran, during 8.8 rainfall days, 34mm (1.3") of precipitation is typically accumulated. Throughout the year, in Tehran, there are 76.4 rainfall days, and 232.8mm (9.2") of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December.

Daylight

The month with the shortest days in Tehran is December, with an average of 9.8h of daylight.

Sunshine

With an average of 4.9h of sunshine, December has the least sunshine of the year.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to the UV radiation for the ordinary person.
The average daily UV index of 2 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Tehran?

In Tehran, in December, the average high-temperature is 10.4°C (50.7°F), and the average low-temperature is 3.3°C (37.9°F).

What is the average humidity in December in Tehran?

In Tehran, the average relative humidity in December is 62%.

How much does it rain in Tehran in December?

In Tehran, during December, the rain falls for 8.8 days and regularly aggregates up to 34mm (1.3") of precipitation.

How many days does it snow in December in Tehran?

In Tehran, Iran, during December, snow falls for 2.7 days.

What is the month with the shortest days in Tehran?

With an average of 9.8h of daylight, December has the shortest days of the year in Tehran.

How many hours of daylight does Tehran have in December?

In Tehran, Iran, the average length of the day in December is 9.8h.

What is the month with the least sunshine in Tehran?

December has the least sunshine of the year in Tehran, with an average of 4.9h of sunshine.

How many hours of sunshine does Tehran have in December?

The average sunshine in December is 4.9h.

When is the lowest UV index in Tehran?

With an average maximum UV index of 2, December is the month with the lowest UV index in Tehran.

What is the UV index intensity in December in Tehran?

The average daily maximum UV index in December in Tehran, Iran, is 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation.
Average temperature in December - Tehran, Iran
  • Average high temperature in December: 10.4°C

The warmest month (with the highest average high temperature) is July (36.8°C).
The month with the lowest average high temperature is January (8.3°C).

  • Average low temperature in December: 3.3°C

The month with the highest average low temperature is July (25.7°C).
The coldest month (with the lowest average low temperature) is January (1.2°C).

Average humidity in December - Tehran, Iran
  • Average humidity in December: 62%

The month with the highest relative humidity is January (64%).
The month with the lowest relative humidity is June (25%).

Average rainfall in December - Tehran, Iran
  • Average rainfall in December: 34mm

The wettest month (with the highest rainfall) is March (40.8mm).
The driest month (with the lowest rainfall) is September (1.1mm).

Average rainfall days in December - Tehran, Iran
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is March (10.9 days).
The month with the lowest number of rainy days is September (1 days).

Average snowfall days in December - Tehran, Iran
  • Average snowfall days in December: 2.7 days

The month with the highest number of snowfall days is January (5.1 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December / Average sunshine in December - Tehran, Iran
  • Average daylight in December: 9.8h

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.8h).

  • Average sunshine in December: 4.9h

Months with most sunshine are June and August (Average sunshine: 11h).
The month with least sunshine is December (Average sunshine: 4.9h).

Average UV index in December - Tehran, Iran
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 12).
The month with the lowest UV index is December (UV index 2).