January 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
January, like December, in Tehran, Iran, is a wintry winter month, with average temperature ranging between max 5.8°C (42.4°F) and min -2.3°C (27.9°F).

Temperature

With an average high-temperature of 5.8°C (42.4°F) and an average low-temperature of -2.3°C (27.9°F), January is the coldest month.

Humidity

The average relative humidity in Tehran is 50%.

Rainfall

In January, the rain falls for 7.8 days. Throughout January, 21mm (0.83") of precipitation is accumulated. In Tehran, during the entire year, the rain falls for 93.2 days and collects up to 244mm (9.61") of precipitation.

Snowfall

January through March, November and December are months with snowfall in Tehran. January is the month with the most snowfall. Snow falls for 3.3 days and accumulates 27mm (1.06") of snow.

Daylight

In Tehran, the average length of the day is 10.1h.

Sunshine

In January, the average sunshine in Tehran is 7.2h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Tehran. A UV Index estimate of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 in January interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Tehran?

The coldest month is January, with an average high-temperature of 5.8°C (42.4°F) and an average low-temperature of -2.3°C (27.9°F).

What is the temperature in January in Tehran?

In January, in Tehran, the average high-temperature is 5.8°C (42.4°F), and the average low-temperature is -2.3°C (27.9°F).

What is the average humidity in January in Tehran?

In January, the average relative humidity in Tehran is 50%.

How much does it rain in Tehran in January?

In Tehran, Iran, in January, it is raining for 7.8 days, with typically 21mm (0.83") of accumulated precipitation.

How many days does it snow in January in Tehran?

In Tehran, in January, during 3.3 snowfall days, 27mm (1.06") of snow is typically accumulated.

What is the snowiest month in Tehran?

January is the month with the most snowfall in Tehran, Iran. Snow falls for 3.3 days and accumulates 27mm (1.06") of snow.

What is the average length of the day in January in Tehran?

The average length of the day in January in Tehran, Iran, is 10.1h.

How long on average sun shines in January in Tehran?

In Tehran, the average sunshine in January is 7.2h.

When is the lowest UV index in Tehran?

Months with the lowest UV index in Tehran, Iran, are January and December, with an average maximum UV index of 2.

What is the UV index intensity in January in Tehran?

In January, the average daily maximum UV index in Tehran, Iran, is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unprotected exposure to the UV radiation.
Average temperature in January - Tehran, Iran
  • Average high temperature in January: 5.8°C

The warmest month (with the highest average high temperature) is July (33.8°C).
The month with the lowest average high temperature is January (5.8°C).

  • Average low temperature in January: -2.3°C

The month with the highest average low temperature is July (24.3°C).
The coldest month (with the lowest average low temperature) is January (-2.3°C).

Average pressure in January - Tehran, Iran
  • Average pressure in January: 1020.1mbar

The month with the highest atmospheric pressure is December (1021.6mbar).
The month with the lowest atmospheric pressure is July (1007.1mbar).

Average wind speed in January - Tehran, Iran
  • Average wind speed in January: 6.6km/h

The windiest month (with the highest average wind speed) is June (9.4km/h).
The calmest months (with the lowest average wind speed) are November and December (5.5km/h).

Average humidity in January - Tehran, Iran
  • Average humidity in January: 50%

The month with the highest relative humidity is February (52%).
The month with the lowest relative humidity is July (19%).

Average rainfall in January - Tehran, Iran
  • Average rainfall in January: 21mm

The wettest month (with the highest rainfall) is April (38mm).
The driest month (with the least rainfall) is September (6mm).

Average rainfall days in January - Tehran, Iran
  • Average rainfall days in January: 7.8 days

The month with the highest number of rainy days is April (13.5 days).
The month with the least rainy days is September (2.9 days).

Average snowfall in January - Tehran, Iran
  • Average snowfall in January: 27mm

The month with the highest snowfall is January (27mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in January - Tehran, Iran
  • Average snowfall days in January: 3.3 days

The month with the highest number of snowfall days is January (3.3 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in January / Average sunshine in January - Tehran, Iran
  • Average daylight in January: 10.1h

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

  • Average sunshine in January: 7.2h

The month with the most sunshine is June (Average sunshine: 12.2h).
The month with the least sunshine is February (Average sunshine: 7h).

Average sunshine days in January - Tehran, Iran
  • Average sunshine days in January: 17.9 days

Months with the most sunshine days are July and September (22.8 days).
The month with the least sunshine days is April (9.5 days).

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

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 2).

Average cloud cover in January - Tehran, Iran
  • Average cloud cover in January: 19

The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is September (Cloud cover 4).

Average visibility in January - Tehran, Iran
  • Average visibility in January: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).