Tehran weather in December
In December, Tehran has an average high of 10 °C50 °F and an average low of 0 °C32 °F, with about 35 mm1.4 in of precipitation. It is the 11th warmest month of the year and ranks 5th for precipitation.
How December compares with other months
Compared with November, December is 4.8 °C8.6 °F cooler on average and drier by 10 mm0.4 in. Compared with January, December is 1.5 °C2.6 °F warmer on average. Daylight lasts about 9.8 hours around the middle of the month. Average relative humidity is 59% and the average cloud amount 51%.
Is December a good time to visit Tehran?
December is not among the most comfortable months by our comfort score: it is cool (average high 10 °C50 °F) and nights are cold (average low 0 °C32 °F). The most comfortable months in Tehran are April and May and October.
What to wear in December
For Tehran in December, pack a warm coat, layers and closed shoes and shoes with good grip, as frost is common.
December in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Tehran | 1050 | 032 | 351.4 |
| Qarchak | 1151 | 236 | 361.4 |
| Karaj | 745 | −129 | 542.1 |
| Nazarabad | 948 | −130 | 461.8 |
| Chalus | 1560 | 846 | 803.1 |
| Amol | 1559 | 846 | 722.8 |
| Saveh | 1253 | −131 | 301.2 |
| Qom | 1356 | 133 | 251.0 |
| Qazvin | 744 | −326 | 642.5 |
Nearby places that are more than 1 °C1.8 °F warmer in December: Qarchak, Chalus, Amol and Qom; cooler: Karaj and Qazvin.
Other months in Tehran
- January8 °C47 °F / −2 °C29 °F
- February11 °C52 °F / 0 °C32 °F
- March17 °C63 °F / 4 °C40 °F
- April22 °C72 °F / 9 °C48 °F
- May29 °C85 °F / 15 °C59 °F
- June35 °C96 °F / 20 °C69 °F
- July38 °C100 °F / 23 °C74 °F
- August36 °C97 °F / 22 °C72 °F
- September31 °C89 °F / 18 °C65 °F
- October24 °C76 °F / 12 °C54 °F
- November15 °C59 °F / 4 °C40 °F
- December10 °C50 °F / 0 °C32 °F
Frequently asked questions
How warm is Tehran in December?
In December the average high in Tehran is 10 °C (50 °F) and the average low is 0 °C (32 °F).
Does it rain a lot in Tehran in December?
On average about 35 mm (1.4 in) of precipitation falls in December; it ranks 5th of the 12 months.
Is December the warmest month in Tehran?
No. The warmest month in Tehran is July, with an average high of 38 °C (100 °F). The coldest month is January, with an average low of -2 °C (29 °F).
How long is the day in Tehran in December?
In the middle of December the day in Tehran lasts about 9.8 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Tehran in December?
The average relative humidity in December is about 59%. This is a long-term average for the whole day.
How cloudy is Tehran in December?
On average about 51% of the sky is covered by cloud in December. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.