Tehran weather by month
Measured at Tehran-Mehrabad
Averages and records for each calendar month at Tehran-Mehrabad, Iran, from 1944 to 2025. The warmest month is July, averaging 37.1°C; the coolest is January at 8.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 8.9°C | 0.0°C | 21.4°C5 January 2015 | −13.0°C1 January 1973 | 16 / 50 |
| February | 11.6°C | 3.0°C | 24.4°C23 February 2016 | −10.0°C3 February 1967 | 16 / 49 |
| March | 17.3°C | 6.5°C | 30.3°C29 March 2018 | −9.0°C6 March 1980 | 20 / 52 |
| April | 23.6°C | 11.9°C | 33.0°C26 April 2008 | −2.6°C1 April 2014 | 19 / 51 |
| May | 29.1°C | 16.9°C | 37.3°C21 May 2025 | 0.0°C19 May 2010 | 22 / 51 |
| June | 34.8°C | 21.8°C | 42.2°C30 June 2015 | 12.4°C6 June 1994 | 21 / 52 |
| July | 37.1°C | 23.9°C | 43.0°C6 July 1975 | 13.9°C13 July 1968 | 24 / 54 |
| August | 36.0°C | 23.6°C | 42.4°C8 August 2024 | 13.9°C27 August 1957 | 24 / 53 |
| September | 32.1°C | 19.3°C | 39.0°C6 September 1979 | 10.6°C30 September 1955 | 22 / 53 |
| October | 25.1°C | 14.1°C | 33.4°C3 October 2002 | 2.0°C20 October 1977 | 27 / 53 |
| November | 15.6°C | 6.1°C | 26.6°C6 November 2012 | −7.2°C23 November 1958 | 16 / 52 |
| December | 10.8°C | 1.7°C | 21.0°C7 December 2005 | −11.5°C12 December 2003 | 17 / 51 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 16 to 27 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.