Tehran, Iran Climate & Monthly Averages
The climate of Tehran
Weather in Tehran is shaped by its semi-arid climate - expect big day-to-night temperature swings and modest rainfall. July afternoons typically reach 100°F (38°C), while January highs hover near 49°F (9°C). Annual precipitation averages 12.0 inches (305 mm) over about 52 rainy days.
Climate quick facts
- Hottest month: July - highs near 100°F (38°C)
- Coldest month: January - highs near 49°F (9°C)
- Record high: 110°F (43°C) · Record low: 9°F (-13°C) (2015–2024)
- Wettest month: March (9 rainy days) · Sunniest: June (12.9 h sun/day)
- Climate type: semi-arid - big day-to-night temperature swings and modest rainfall
- Snow: about 7 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 100°F (38°C) and overnight lows stay near 79°F (26°C). The coolest month is January, with typical highs of 49°F (9°C) and lows around 31°F (0°C). Based on 2015–2024 weather data, temperatures have reached as high as 110°F (43°C) and dropped as low as 9°F (-13°C).
Rain, sun and snow
March is usually the wettest month. It brings about 2.2 inches (57 mm) of rain over 9 days, while August is the driest. June brings the most sunshine, averaging 12.9 hours of sun a day. Snow falls on about 7 days in a typical year, mostly from November through March.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 49° | 31° | 7 | 1.6 in | 8.5 h/day | 52% |
| February | 52° | 34° | 8 | 1.8 in | 8.8 h/day | 54% |
| March | 62° | 42° | 9 | 2.2 in | 9.6 h/day | 48% |
| April | 73° | 52° | 7 | 1.5 in | 10.8 h/day | 40% |
| May | 85° | 62° | 4 | 0.7 in | 12.0 h/day | 30% |
| June | 96° | 73° | 0 | 0.1 in | 12.9 h/day | 19% |
| July | 100° | 79° | 0 | 0.1 in | 12.8 h/day | 20% |
| August | 97° | 76° | 0 | 0.0 in | 12.7 h/day | 20% |
| September | 90° | 69° | 1 | 0.1 in | 11.3 h/day | 23% |
| October | 76° | 57° | 4 | 0.8 in | 10.2 h/day | 36% |
| November | 60° | 43° | 6 | 1.6 in | 8.3 h/day | 52% |
| December | 51° | 35° | 6 | 1.5 in | 7.9 h/day | 54% |
Tehran month by month
Tehran weather in January
January brings highs around 49°F (9°C), lows near 31°F (0°C), about 7 wet days and roughly 3 snowy days - typically the coldest month of the year in Tehran.
Tehran weather in February
February brings highs around 52°F (11°C), lows near 34°F (1°C), about 8 wet days and roughly 2 snowy days.
Tehran weather in March
March brings highs around 62°F (17°C), lows near 42°F (6°C), about 9 wet days - typically the wettest month of the year in Tehran.
Tehran weather in April
April brings highs around 73°F (23°C), lows near 52°F (11°C), about 7 wet days.
Tehran weather in May
May brings highs around 85°F (29°C), lows near 62°F (17°C), about 4 wet days.
Tehran weather in June
June brings highs around 96°F (36°C), lows near 73°F (23°C), about 0 wet days - typically the sunniest month of the year in Tehran.
Tehran weather in July
July brings highs around 100°F (38°C), lows near 79°F (26°C), about 0 wet days - typically the hottest month of the year in Tehran.
Tehran weather in August
August brings highs around 97°F (36°C), lows near 76°F (24°C), about 0 wet days - typically the driest month of the year in Tehran.
Tehran weather in September
September brings highs around 90°F (32°C), lows near 69°F (20°C), about 1 wet days.
Tehran weather in October
October brings highs around 76°F (24°C), lows near 57°F (14°C), about 4 wet days.
Tehran weather in November
November brings highs around 60°F (15°C), lows near 43°F (6°C), about 6 wet days.
Tehran weather in December
December brings highs around 51°F (11°C), lows near 35°F (1°C), about 6 wet days and roughly 1 snowy days.
Seasons in Tehran
Spring (March through May)
Spring in Tehran is mild and warm, with daytime highs averaging 73°F (23°C) and nights around 52°F (11°C); expect showers on roughly 20 days across the season.
Summer (June through August)
Summer in Tehran brings serious heat, with daytime highs averaging 98°F (36°C) and nights around 76°F (24°C); precipitation is infrequent.
Fall (September through November)
Fall in Tehran brings comfortable warmth, with daytime highs averaging 75°F (24°C) and nights around 56°F (13°C); rain falls on about 11 days over the three months.
Winter (December through February)
Winter in Tehran is chilly, with daytime highs averaging 51°F (10°C) and nights around 33°F (1°C); expect showers on roughly 20 days across the season, plus around 6 snowy days.
Climate questions, answered
What is the average temperature in Tehran?
Is Tehran hot in summer?
Is Tehran cold in winter?
How many rainy days does Tehran get in a year?
Best time to visit Tehran
The best time to visit Tehran is generally March to April and October to November, when temperatures are at their most comfortable before or after the peak heat. Daytime temperatures in that window typically sit near 68°F (20°C).
Pack for Tehran with lightweight, breathable clothing and strong sun protection for the hot months; a warm jacket and layers for the cooler season. Evenings can feel noticeably cooler than afternoons - July nights average 79°F (26°C).
Tehran temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.