Weather in Tehran 🇮🇷
Monthly weather averages & travel planning
August
Avg Temp
29°C
Rain Days
4 days
Sun Hours
7 hrs
Humidity
45%
Asia › 🇮🇷 Iran › Tehran
Updated: March 2026
Is August a Good Time to Visit Tehran?
6/10
Good
August is a good time to visit Tehran (6/10). With 7 daily sunshine hours and only 4 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 5th sunniest of the year in Tehran. Culture-focused travellers and those who prefer lighter crowds will find August a practical choice, with prices running lower than peak May without sacrificing all the good weather. September offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Tehran's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.
vs July:33°C avg high
Tehran's August climate peaks at 29°C each afternoon before cooling to 16°C overnight. 7 daily sunshine hours and just 4 wet days mean the odds of a fine day are solidly in your favour. It is an excellent window for outdoor itineraries.
29°C
84°F
Avg High
16°C
61°F
Avg Low
4 days
19 mm total
Rain Days
7h
per day avg
Sunshine
45%
Dry
Humidity
Temperature in Tehran in August
The 13°C day-to-night swing is large enough to require a deliberate layering strategy, what works at noon will be noticeably cold by 10pm. Humidity averages 45%, which is comfortable for most visitors. The air feels fresh and dry enough to make extended outdoor activity pleasant. UV index averages 9 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Wind averages 15 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 84°F average high, 61°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Tehran in August
Morning16°CBefore the day warms up
Afternoon29°CPeak daytime temperature
Evening19°CAfter sunset cools down
Packing for Tehran in August means dressing for 29°C days and 16°C evenings. A lightweight linen or cotton shirt with loose-fit trousers or a sundress handles the 29°C daytime heat. Evenings drop 13°C to around 16°C, a notable shift that catches underprepared visitors off guard. Pack a dedicated evening layer. For footwear, breathable walking sandals work for casual exploration, but closed-toe trainers are better for uneven surfaces in the historic centre. For temple and religious site visits, carry a lightweight scarf or sarong to cover shoulders and knees, required at most major sites across the region.
Local tip: Temple and religious site visits require covered shoulders and knees in most of Tehran's heritage areas. A lightweight scarf or sarong weighs almost nothing and solves the problem instantly.
Events in Tehran in August
August has no major festivals or public holidays in Tehran, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Tehran in August
Based on 29°C average highs and 4 rainy days
- Light layers for morning and evening
- Breathable T-shirts and comfortable trousers
- UV-protective sunglasses
- Quick-dry travel towel
- Anti-chafe balm for long walking days
- Moisture-wicking synthetic fabrics for active days
- SPF 30+ sunscreen
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Tehran in August
- Early morning walk through Tehran's historic market districtBest before 9amTemperatures are still manageable at 25°C before the midday heat builds
- Open-air rooftop dining at sunsetFrom 6pm onwardsThe 29°C daytime heat drops noticeably after sunset, making al fresco dining comfortable
- Waterfront promenade or harbour walkEarly morning or after 5pmSea breezes cut through the humidity, making coastal routes the most pleasant in heat
- Guided cycling tour of the old quarterFirst tour of the day (7-9am)The low-traffic window before tourist crowds and the cooler morning air make this the prime riding slot
- Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
- Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
- Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningAugust brings distinct seasonal changes to public green spaces worth exploring
- Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in August, with vendors setting up specifically for warm evenings
Why is Tehran warm in August?
Tehran's August heat is driven by the Asian summer monsoon system, as the low-pressure cell that forms over the heated landmass draws warm, humid air from the oceans. The result is temperatures averaging 29°C with high moisture in the air. Overnight temperatures remain elevated at 16°C, as clouds and humidity prevent the earth from radiating heat away after sunset. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Tehran in August
In August, Tehran experiences average highs of 29°C (84°F) and lows of 16°C (61°F). Expect around 4 rainy days and 7 hours of sunshine per day, with humidity averaging 45%. The 13°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 4 rainy days in August, with total precipitation of around 19mm. This makes August 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 August.
Pack lightweight, breathable clothing (linen or cotton), a wide-brim sun hat, SPF 50+ sunscreen, and a refillable water bottle for Tehran in August. The 29°C daytime heat demands sun protection during midday hours, typically 11am to 4pm. Rain is unlikely with only 4 wet days, so leave the umbrella at home and use the bag space for sunscreen. Quick-dry synthetic fabrics are preferable to cotton in 45% humidity.
Yes, August is an excellent time to visit Tehran. With 7 daily sunshine hours and only 4 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 29°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 August is 29°C (84°F), and the average low is 16°C (61°F). The mean daily temperature is approximately 23°C (73°F). The day-to-night range of 13°C is significant and requires layering. 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 May. May offers the most sunshine at 8 hours per day and only 4 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 May gives you the best chance of dry, bright weather.
August is shoulder or low season in Tehran, meaning fewer tourists and generally lower prices than peak months. With 7 sunshine hours and 4 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 August, Tehran suits a range of activities thanks to warm temperatures of 29°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 7 hours of sunshine, parks and waterfront walks are particularly enjoyable.
August ranks 5th sunniest of the year in Tehran, with an average 7 daily sunshine hours. The driest months are December, January, and February. June is the hottest month (35°C avg high); December is the coolest (9°C). From here, temperatures fall 7°C into September. Compared to last month (July: 33°C high, 4 rain days), August is cooler and equally dry. August sits in the middle of the annual sunshine ranking for Tehran, offering a reasonable balance of good weather and manageable crowds.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 11°C | -2°C | 2 | 2h | View |
| February | 16°C | 3°C | 2 | 4h | View |
| March | 22°C | 9°C | 3 | 5h | View |
| April | 29°C | 16°C | 4 | 7h | View |
| May | 33°C | 20°C | 4 | 8h | View |
| June | 35°C | 22°C | 5 | 8h | View |
| July | 33°C | 20°C | 4 | 8h | View |
| August | 29°C | 16°C | 4 | 7h | View |
| September | 22°C | 9°C | 3 | 5h | View |
| October | 16°C | 3°C | 2 | 4h | View |
| November | 11°C | -2°C | 2 | 2h | View |
| December | 9°C | -4°C | 1 | 2h | View |
January
2 rain days, 2h sun
11°-2°
February
2 rain days, 4h sun
16°3°
March
3 rain days, 5h sun
22°9°
April
4 rain days, 7h sun
29°16°
May
4 rain days, 8h sun
33°20°
June
5 rain days, 8h sun
35°22°
July
4 rain days, 8h sun
33°20°
August
4 rain days, 7h sun
29°16°
September
3 rain days, 5h sun
22°9°
October
2 rain days, 4h sun
16°3°
November
2 rain days, 2h sun
11°-2°
December
1 rain days, 2h sun
9°-4°
Other Months in Tehran
Plan Your Trip to Tehran
Data Sources for Tehran
Climate normals represent 30-year averages (1991-2020). Individual years may vary.