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Climate in Tehran
(Iran)

Average daytime and nighttime temperatures


All climate diagrams on this page result from the collected data of the official weather station in Tehran in a height of 1191m above sea level. All data correspond to the average monthly values of the last 20 years.


Back to overview: Iran

Several months of the year it is warm to hot at temperatures continuously above 25 degrees centigrade, sometimes up to 38 degrees. Due to the warmer temperatures the best time for traveling is from June to September. Nearly unattractive for tourists are the cold months from November to March.
Overview: Climate in Iran
Daylengths and sun positions in Iran
Compare climate with other regions or countries
Hours of sunshine per daySunshine hours per day in Tehran
The number of hours of sunshine refers to the time when the sun is actually visible. That is, without any obstruction of visibility by clouds, fog or mountains. With 12 hours per day, June is the sunniest month in country part Tehran. In December the sun shines the shortest.
Rainy days per monthRainy days per month in Tehran
A rainy day is a day on which at least an amount of 0.1 mm precipitation (=0.1 liter) per square meter falls. This can be rain, snow, hail or even dew. So it does not have to rain the whole day. With 7 rainy days, November offers the most number of rainy days, and in August the least.
Precipitation in mm/dayPrecipitation in Tehran
The amount of precipitation is measured in millimeters per square meter. Thus, at 2 mm/day, 2 liters of water fall on one square meter within 24 hours. With only 0.030 mm, the least rain falls in September. April, on the other hand, has the most rain.
Relative humidity in %Relative humidity in Tehran
Warm air can absorb more moisture than cold air. The relative humidity indicates how much moisture of the physically possible is actually contained in the air. At high humidity, the person feels uncomfortable and perceives this as oppressive. In general, a relative humidity of 40-60% gives as pleasant. With only 24% humidity on average, it is quite dry in August. The highest value of 65% is experienced here in January.
Absolute humidity in g/m³Absolute humidity in Tehran
In warm months, there is also a higher absolute humidity almost everywhere. At a temperature of 25°C, air can absorb up to 23 grams of water per cubic meter. At 20°C, it is only 17.3 grams. A relative humidity of 40% at 25°C thus corresponds to an absolute humidity of 9.2 grams of water. From a proportion of approx. 13.5 grams, humans perceive the air as muggy.
Humidex in °CHumidex in Tehran
The "Humidex" (humidity index) is an index of well-being in warmer areas, calculated from the air temperature, relative humidity and dew point. The index corresponds approximately to the temperature felt. At high temperatures, the body transports heat away by sweating. At high humidity the ambient air can only absorb a small amount of sweat and thus one feels uncomfortable. An index of 20-29 is considered comfortable. Up to 39, people perceive the air as slightly uncomfortable, and above 40, as very uncomfortable. Values above 45 are dangerous in the long run and often lead to heat stroke.
Map of Tehran

Most important cities in the country part »Tehran«

As the capital region, it is arguably the most important part of Iran. The country part has a west-east extension of about 100 km and over 50 km from north to south.

CityPopulationGeo-Position
Tehran8,846,78235° 41' 40"N51° 25' 17"E
Shahriar309,60735° 39' 32"N51° 3' 28"E
Malard281,02735° 39' 57"N50° 58' 36"E
Qarchak231,07535° 25' 43"N51° 34' 32"E
Varamin179,60335° 19' 27"N51° 38' 45"E
Shahre Jadide Andisheh80,00035° 40' 49"N51° 1' 9"E
Robat Karim62,75335° 29' 5"N51° 4' 58"E
Pishva53,85635° 18' 29"N51° 43' 36"E
Eqbaliyeh36,70935° 18' 8"N51° 32' 9"E
Damavand29,14435° 43' 6"N52° 4' 10"E
Sharifabad8,87035° 25' 39"N51° 47' 7"E
Shahrak-e Emam Hasan-e Mojtaba5,39435° 28' 60"N51° 21' 0"E
Taleb abad4,85035° 30' 5"N51° 31' 53"E


Data basis: German Weather Service, individual values averaged and supplemented by own elements. Data on cities and inhabitants: geonames.org, United Nations Statistics Division and own research.
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