Monthly weather averages & travel planning

Asia › 🇮🇷 Iran › Tehran
Updated: March 2026
March is a good time to visit Tehran (6/10). Average highs of 22°C and 5 sunshine hours daily make conditions workable, though not exceptional. Culture-focused travellers and those who prefer lighter crowds will find March a practical choice, with prices running lower than peak May without sacrificing all the good weather. April 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.
Tehran's March climate peaks at 22°C each afternoon before cooling to 9°C overnight. 5 daily sunshine hours and just 3 wet days mean the odds of a fine day are solidly in your favour. It is an excellent window for outdoor itineraries.
22°C
72°F
Avg High
9°C
48°F
Avg Low
3 days
15 mm total
Rain Days
5h
per day avg
Sunshine
45%
Dry
Humidity
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 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Wind averages 15 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 72°F average high, 48°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Packing for Tehran in March means dressing for 22°C days and 9°C evenings. A light cotton tee with a casual overshirt works well at 22°C, the overshirt doubles as a layer for air-conditioned venues. Evenings drop 13°C to around 9°C, a notable shift that catches underprepared visitors off guard. Pack a dedicated evening layer. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. 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.
March 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.
Based on 22°C average highs and 3 rainy days
March marks the transition into warmer conditions in Tehran, as the sun angle climbs and day length extends. Temperatures averaging 22°C by day and 9°C overnight reflect a city shaking off winter: the morning air still carries a cool edge, but afternoons are noticeably warmer than even four weeks prior. At 36 degrees north latitude, spring is one of the most dynamic periods in the annual cycle, with weekly temperature changes that can be larger than the month-to-month shifts of summer. This volatility is part of the appeal: Tehran in March has a freshness and energy that peak-summer heat tends to mute. The warmth is sufficient for outdoor dining and long walking days. 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.
Tehran in March
March ranks 6th sunniest of the year in Tehran, with an average 5 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 rise 7°C into April. Compared to last month (February: 16°C high, 2 rain days), March is warmer and wetter. March sits in the middle of the annual sunshine ranking for Tehran, offering a reasonable balance of good weather and manageable crowds.
| 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
February
2 rain days, 4h sun
March
3 rain days, 5h sun
April
4 rain days, 7h sun
May
4 rain days, 8h sun
June
5 rain days, 8h sun
July
4 rain days, 8h sun
August
4 rain days, 7h sun
September
3 rain days, 5h sun
October
2 rain days, 4h sun
November
2 rain days, 2h sun
December
1 rain days, 2h sun
Data Sources for Tehran
Climate normals represent 30-year averages (1991-2020). Individual years may vary.