Tehran's average temperature over the last 30 years is around 16.4°C. Jul is typically the hottest month and Jan the coldest, with total annual rainfall averaging about 318 mm.
| Year | Max Temp | Min Temp | Precipitation |
|---|---|---|---|
| 2025 | 41°C | -7°C | 133 mm |
| 2024 | 43°C | -5°C | 293 mm |
| 2023 | 41°C | -5°C | 234 mm |
| 2022 | 42°C | -5°C | 219 mm |
| 2021 | 42°C | -5°C | 220 mm |
| 2020 | 41°C | -8°C | 450 mm |
| 2019 | 42°C | -3°C | 381 mm |
| 2018 | 42°C | -12°C | 328 mm |
| 2017 | 41°C | -5°C | 220 mm |
| 2016 | 39°C | -13°C | 327 mm |
| 2015 | 40°C | -9°C | 375 mm |
| 2014 | 40°C | -15°C | 224 mm |
| 2013 | 41°C | -12°C | 310 mm |
| 2012 | 38°C | -16°C | 350 mm |
| 2011 | 40°C | -18°C | 496 mm |
| 2010 | 41°C | -15°C | 273 mm |
| 2009 | 40°C | -14°C | 316 mm |
| 2008 | 39°C | -23°C | 210 mm |
| 2007 | 38°C | -16°C | 413 mm |
| 2006 | 40°C | -15°C | 335 mm |
| 2005 | 40°C | -16°C | 330 mm |
| 2004 | 38°C | -13°C | 400 mm |
| 2003 | 40°C | -12°C | 329 mm |
| 2002 | 39°C | -18°C | 424 mm |
| 2001 | 39°C | -16°C | 253 mm |
| 2000 | 39°C | -12°C | 295 mm |
| 1999 | 38°C | -8°C | 285 mm |
| 1998 | 40°C | -17°C | 354 mm |
| 1997 | 39°C | -15°C | 252 mm |
| 1996 | 37°C | -19°C | 469 mm |
| Month | Avg High | Avg Low | Rainfall |
|---|---|---|---|
| Jan | 7°C | -4°C | 41 mm |
| Feb | 9°C | -2°C | 45 mm |
| Mar | 15°C | 3°C | 58 mm |
| Apr | 21°C | 9°C | 43 mm |
| May | 28°C | 15°C | 15 mm |
| Jun | 34°C | 22°C | 4 mm |
| Jul | 36°C | 25°C | 4 mm |
| Aug | 35°C | 24°C | 4 mm |
| Sep | 31°C | 19°C | 4 mm |
| Oct | 24°C | 13°C | 19 mm |
| Nov | 14°C | 5°C | 39 mm |
| Dec | 9°C | -1°C | 42 mm |