Country Overview For Iran
The climate in Iran is typically mostly arid or semiarid, subtropical along Caspian coast. The terrain: rugged, mountainous rim; high, central basin with deserts, mountains; small, discontinuous plains along both coasts. For Tehran in January the daily average maximum temperatures is 8°C with the average minimum 1°C, while in June the average maximum is 34°C with a minimum of 22°C. The wettest month for Tehran is March with an average of 51.3mm of precipitation falling while the driest month is July with 2.3mm falling.
HISTORICAL MONTHLY AVERAGES FOR JANUARY
The information presented below gives detailed historical monthly average weather conditions along with exceptional weather occurrences. To maintain relevance to current weather trends the displayed information has been calculated using data collected over the past two decades. The climate profile is taken from closest available data source to Ramsar.
Throughout the month of January daytime temperatures will generally reach highs of around 10°C that's about 51°F. At night the average minimum temperature drops down to around 3°C, that's 38°F.
In recent times the highest recorded temperature in January has been 22°C that's 71°F, with the lowest recorded temperature -6°C, about 21°F.
The average daily relative humidity for January is around 83%.
The Heat Index is a measure of how hot it feels when relative humidity is added to actual air temperature. From this a comfort level is calculated providing categories on how heat conditions might adversely affect someone.
Comfort Levels: Given average maximum temperatures and humidity levels generally you should not anticipate any discomfort from heat (see heat index for more information).
The average monthly amount of precipitation has been recorded at around 58 mm, that's 2 inches. Throughout the month you can expect to see rain or drizzle falling on 11 days of the month.
The average daily wind speed in January has been around 6 km/h, that’s the equivalent to about 4 mph, or 3 knots. In recent years the maximum sustained wind speed has reached 81 km/h, that’s the equivalent of around 51 mph, or 44 knots.
On average the month of January is affected by foggy conditions on less than 1 day.
YEARLY TRENDS: WEATHER AVERAGES & EXTREMES
The following charts show yearly weather trends with information on monthly weather averages and extremes.
The chart below plots the average high and low temperature for each month of the year. It also shows the maximum and minimum recorded temperatures.
The chart below plots the average monthly precipitation amount.
The chart below plots the average number of days in any month that you can expect to see rain falling.
The chart below plots the average daily wind speed you can expect for any month. It also shows the maximum recorded sustained wind speed for each month.