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

May 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
The last month of the spring, May, is a moderately hot month in Tehran, Iran, with temperature in the range of an average low of 18.4°C (65.1°F) and an average high of 28.5°C (83.3°F).

Temperature

In Tehran, Iran, the average high-temperature rises, from a pleasant 22.8°C (73°F) in April, to a moderately hot 28.5°C (83.3°F). In Tehran, the average low-temperature is 18.4°C (65.1°F).

Humidity

In Tehran, the average relative humidity is 33%.

Rainfall

In Tehran, in May, during 8.8 rainfall days, 15.4mm (0.6") of precipitation is typically accumulated. Throughout the year, there are 76.4 rainfall days, and 232.8mm (9.2") of precipitation is accumulated.

Snowfall

In May, in Tehran, it doesn't snow. April is the latest month when it typically snows. In Tehran, during the entire year, snow falls for 12.3 days.

Daylight

In Tehran, Iran, the average length of the day is 14.1h.

Sunshine

The average sunshine in Tehran is 9.2h.

UV index

The average daily maximum UV index in May is 11. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
The average daily UV index of 11 in May transform into the following instructions:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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. Prolonged stay under the direct sun should be avoided as much as possible, especially if a person burns easily. Sunscreen with a minimum 30 sun protection factor should always be used.

What is the temperature in May in Tehran?

The average high-temperature, in May, in Tehran, Iran, is 28.5°C (83.3°F), while the average low-temperature is 18.4°C (65.1°F).

What is the average humidity in May in Tehran?

In May, the average relative humidity in Tehran is 33%.

How many days does it rain in May in Tehran?

In Tehran, Iran, during May, the rain falls for 8.8 days and regularly aggregates up to 15.4mm (0.6") of precipitation.

Does it snow in Tehran in May?

In May, in Tehran, Iran, it doesn't snow. April is the latest month when it typically snows.

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

In May, the average length of the day in Tehran is 14.1h.

How long on average sun shines in May in Tehran?

The average sunshine in May in Tehran, Iran, is 9.2h.

What is the UV index intensity in May in Tehran?

The average daily maximum UV index in May in Tehran, Iran, is 11. A UV Index value of 11, and more, symbolizes an ultimate hazard to health from unprotected exposure to the UV radiation.
Average temperature in May - Tehran, Iran
  • Average high temperature in May: 28.5°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 May: 18.4°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 May - Tehran, Iran
  • Average humidity in May: 33%

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

Average rainfall in May - Tehran, Iran
  • Average rainfall in May: 15.4mm

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 May - Tehran, Iran
  • Average rainfall days in May: 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 May - Tehran, Iran
  • Average snowfall days in May: 0 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 May / Average sunshine in May - Tehran, Iran
  • Average daylight in May: 14.1h

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 May: 9.2h

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 May - Tehran, Iran
  • Average UV index in May: 11

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).