Tehran has a semi-arid steppe climate, classified as BSk in the Köppen system. The warmest month is July with an average high of 36°C, while the coldest month is January with lows dropping to -5°C. The annual temperature range of 41°C is typical of continental climates with distinct seasons.
The driest month is September with only 1 rain days and 4mm of precipitation. For travellers, September through to the following month typically offers the best balance of warm temperatures and dry conditions. Average humidity ranges from 65% to 65% throughout the year.
Best Time to Visit Tehran
Based on temperature and rainfall data, the best months to visit Tehran are May, October, April. These months offer the most comfortable temperatures with relatively low rainfall, ideal for sightseeing and outdoor activities.
In July, Tehran experiences average highs of 36°C (97°F) and lows of 24°C (75°F). Expect around 1 rainy days and 13 hours of sunshine per day, with humidity averaging 65%. The 12°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 9, so sun protection is advisable on clear days.
Tehran typically sees 1 rainy days in July, with total precipitation of around 4mm. This makes July one of the drier months of the year, and a reliable window for outdoor sightseeing and day trips. Rain showers tend to be brief when they do occur. For context, the driest month in Tehran typically sees 4-6 fewer rain days than July.
Pack lightweight, breathable clothing (linen or cotton), a wide-brim sun hat, SPF 50+ sunscreen, and a refillable water bottle for Tehran in July. The 36°C daytime heat demands sun protection during midday hours, typically 11am to 4pm. Rain is unlikely with only 1 wet days, so leave the umbrella at home and use the bag space for sunscreen. Quick-dry synthetic fabrics are preferable to cotton in 65% humidity.
Yes, July is an excellent time to visit Tehran. With 13 daily sunshine hours and only 1 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 36°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.
The average high temperature in Tehran in July is 36°C (97°F), and the average low is 24°C (75°F). The mean daily temperature is approximately 30°C (86°F). The day-to-night range of 12°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Tehran is generally June. June offers the most sunshine at 13 hours per day and only 2 rainy days. Average temperatures reach 33°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around June gives you the best chance of dry, bright weather.
July is shoulder or low season in Tehran, meaning fewer tourists and generally lower prices than peak months. With 13 sunshine hours and 1 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In July, Tehran suits a range of activities thanks to warm temperatures of 36°C. With few rainy days, outdoor activities are highly recommended. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 13 hours of sunshine, parks and waterfront walks are particularly enjoyable.