Best Time to Visit Tehran
The best time to visit Tehran is April to June and September to October, when the average temperature is 16–28°C and rainfall is low for Tehran, at 6–38 mm a month.
Tehran weather by month
The wettest month in Tehran is November with 45 mm of rain, and the warmest is July at an average 31°C. The coolest is January at 3°C.
| Month | Average temperature | Rainfall | Verdict |
|---|---|---|---|
| January | 3°C / 38°F | 33 mm | Cold |
| February | 6°C / 42°F | 34 mm | Cool |
| March | 11°C / 51°F | 35 mm | Cool |
| April | 16°C / 60°F | 38 mm | Best |
| May | 22°C / 72°F | 15 mm | Best |
| June | 28°C / 82°F | 6 mm | Best |
| July | 31°C / 87°F | 7 mm | Hot |
| August | 29°C / 85°F | 8 mm | Hot |
| September | 25°C / 77°F | 16 mm | Best |
| October | 18°C / 65°F | 36 mm | Best |
| November | 10°C / 49°F | 45 mm | Cool |
| December | 5°C / 41°F | 35 mm | Cool |
How we pick the best months
- Best: an average temperature of 15–28°C and low rainfall for Tehran: under 150 mm, and no more than 60 mm, a quarter above Tehran's median month (never set below 60 mm).
- If no month qualifies, we show the three driest months that average 10–30°C instead.
- Wet: 150 mm of rain or more. Rainy: more than 60 mm. Hot: 29°C or more on average. Cool: under 15°C. Cold: under 5°C.
Averages cover day and night, so afternoons are warmer than the figure shown. Weather is only one reason to pick a month: school holidays, festivals and prices matter too.
Search flights to Tehran
Picked a month? Compare fares to Tehran (IKA) for your dates.
Book a hotel in Tehran
Find hotels in Tehran
Hotels, hostels & more · Trip.com
Where these numbers come from
Monthly averages for January 2001 – December 2020 from the NASA POWER project, for the area around Imam Khomeini International (IKA) at 35.42, 51.15. The model covers a grid about 50 km across, so a coastal or hilly spot can run a degree or two different. Retrieved 12 September 2026.
The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) Prediction of Worldwide Energy Resource (POWER) Project funded through the NASA Earth Science/Applied Science Program.