Tehran Weather in May
Tehran in May sees high temperatures, with highs around 26°C (79°F) and overnight lows of 14°C (57°F). Overall perfect conditions make it one of the better months to visit.
Rainfall in Tehran in May
Historically, the month has about 10 days of rain, averaging 21 mm (0.8 in) in total. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Tehran in May
May is a good time to be in Tehran. Days are perfect, reaching 26°C (79°F), with nights around 14°C (57°F). This kind of day-to-night contrast is typical for this time of year. Nights drop to around 14°C (57°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Tehran in May
The month enjoys around 290 hours of sunshine, creating mostly sunny days with good weather conditions.
Wind Speed in Tehran in May
Wind speeds average 3 m/s (6 knots) during May. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iran, check out our Tehran's climate page.
Tehran Temperature in May
Min Temperature
14°C (57°F)
Max Temperature
26°C (79°F)
Chance of Rain
32%
Precipitation
21 mm (0.8 in)
Rainy days
10 days
Humidity
33% *
Windspeed
3 m/s (6 knots) *
Sunshine
290 hours *
Percentage Sunshine
*
Daily Historical Temperatures
42-year average (1976-2025)
Based on our historical records, temperatures in Tehran typically rise from around 25°C (77°F) at the start of May to approximately 31°C (88°F) by the end. Nights are pleasant, with lows typically ranging from 15°C (59°F) to 21°C (70°F).
Average temperatures in May
Daily Historical Precipitation
42-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Tehran in May
Browse day-by-day weather records for Tehran spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Tehran historical weather extremes in May
Based on weather observations in Tehran between 2004 and 2026, these are the recorded extremes during May.
- The hottest May day on record in Tehran reached 37°C (99°F) (May 26, 2008).
- The coldest May day was on May 17, 2007, with a maximum of 18°C (64°F).
- The lowest overnight temperature recorded in May was 7°C (45°F) (May 5, 2010).
Best Places in Iran in May
Find out more about the weather in Iran and which places have the best travel conditions in this month. See all of Iran in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Tehran in May
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Some rain is possible, so pack something to handle light showers. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Tehran in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iran, check out our Tehran's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Tehran climate overview or explore weather in Iran.
