Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in Tehran is from April, May, October. — consistent weather climate
🌡Hot & dry
| Score | 29 | 37 | 63 | 89 | 95 | 55 | 47 | 52 | 86 | 95 | 60 | 38 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Cold | Cold | Cold | Mild | Pleasant | Hot & dry | Hot & dry | Hot & dry | Hot & dry | Pleasant | Cold | Cold |
| Temperature | 0–9°C | 1–11°C | 6–17°C | 11–23°C | 17–29°C | 23–36°C | 26–38°C | 24–36°C | 20–32°C | 14–24°C | 6–15°C | 1–11°C |
| Feels like | -5–6°C | -3–8°C | 2–14°C | 7–21°C | 14–27°C | 20–34°C | 24–36°C | 22–34°C | 18–30°C | 11–22°C | 3–13°C | -3–7°C |
| Precipitation | 41mm 7 days | 47mm 8 days | 57mm 8 days | 39mm 6 days | 17mm 3 days | 1mm 0 days | 1mm 0 days | 0mm 0 days | 4mm 1 days | 20mm 3 days | 40mm 7 days | 39mm 6 days |
| Sunshine | 8.5h ☀︎ 84% | 8.8h ☀︎ 81% | 9.6h ☀︎ 80% | 10.8h ☀︎ 83% | 12.0h ☀︎ 86% | 12.9h ☀︎ 89% | 12.8h ☀︎ 90% | 12.7h ☀︎ 94% | 11.3h ☀︎ 91% | 10.2h ☀︎ 91% | 8.3h ☀︎ 81% | 7.9h ☀︎ 80% |
| Wind | NE · 13 km/h | NE · 14 km/h | N · 17 km/h | N · 17 km/h | N · 19 km/h | SE · 17 km/h | SE · 15 km/h | S · 14 km/h | SE · 14 km/h | NE · 14 km/h | NE · 12 km/h | NE · 11 km/h |
| Humidity (%) | 52% | 54% | 48% | 40% | 30% | 19% | 20% | 20% | 23% | 36% | 52% | 54% |
| Day length | 10.1h | 10.9h | 12.0h | 13.1h | 14.1h | 14.5h | 14.3h | 13.5h | 12.4h | 11.3h | 10.3h | 9.8h |
One of the largest book fairs in the world, this event draws enormous crowds of readers, publishers, and authors to Tehr…
Iran's premier film festival takes over Tehran's cinemas each winter, showcasing new Iranian and international films alo…
Tehran endures its biggest crowd surge in June just as the city turns into a sun-baked stone basin, while its two genuine masterpieces of weather—May and October—remain blissfully uncrowded.
Sprawling across the lower slopes of the snow-crested Alborz range, Tehran is a restless, high-altitude metropolis that constantly surprises those who expect a quiet desert capital. Established as the seat of power in 1786 by the Qajar dynasty to keep watch over turbulent northern frontiers, it absorbed the ancient citadel of Rey and transformed from a fortified orchard town into an electric, chaotic mega-city of nine million people. To walk Tehran without understanding its seasons is to risk walking through an exhaust-laden, baking haze. But arrive when the mountain gales scrub the sky clean, and the city reveals leafy plane trees, roaring snowmelt streams, and quiet hillside courtyards with a clarity that stops you in your tracks.
Spring is when Tehran performs its most convincing magic trick. In April and May, the snowline retreats up the granite walls of the Alborz, and meltwater rushes through the stone gutters lining Valiasr Street. The air in northern districts like Tajrish carries the sweet, damp scent of blossoming Persian gardens and wild thyme. Days are gentle and bright, warming comfortably into the twenties, before mountain downdrafts cool the city down to jacket weather each evening.
Outdoor life takes over. City parks fill with families spreading carpets beneath the sycamores, tea vendors setting up brass samovars along sidewalks, and youth congregating along the shaded stone stairs of Darband. In late spring, cultural life hits its stride with the massive Tehran International Book Fair, an event of colossal scale where hundreds of thousands of readers, academics, and publishers descend on exhibition halls to debate, browse, and socialize amid the balmy air. For walking the grand grounds of Golestan Palace or wandering Rey's historic quarter, May offers the cleanest skies and easiest pace of the entire year.
Here lies the central paradox of Tehran's travel calendar: visitor numbers peak abruptly in June, precisely as the city's climate takes a sharp turn for the punishing. By midsummer, temperatures consistently push past 36 degrees, and the apparent heat radiates off asphalt and concrete with fierce intensity. The urban basin traps exhaust and dust, obscuring the mountains behind a bleached, yellow glare.
During these months, sensible urban life shifts entirely onto night shifts. By day, broad squares like the plaza around Azadi Tower become blinding, uninhabitable expanses of reflective stone where pedestrians hustle between air-conditioned metro stations and subterranean shops. Only after nine in the evening does the metropolis breathe again. Crowds migrate upward into the foothills, packing the terraced tea houses and kebab platforms of Darband and Tajrish, dangling their feet over cold mountain streams in search of the night chill that eludes the downtown streets below.
As September draws to a close, summer breaks with sudden, relieving drama. High-altitude breezes roll down from the north, flushing out the basin's accumulated haze. October delivers what is easily Tehran's most sublime stretch of weather: brilliant, unblemished sunshine paired with crisp afternoon air in the low twenties, completely devoid of humidity.
Unlike June's congestion, autumn sees visitor numbers fall quietly back to manageable levels. Walking through the grand courtyards of Golestan Palace or exploring the bazaars around Rey feels relaxed and unhurried. The city's famous long avenues turn golden as sycamore leaves carpet the gutters, and the silhouette of the mountains sharpens against deep cerulean skies. If you want to experience Tehran at its most welcoming, articulate, and visually striking, October is the single finest window on the calendar.
Winter in the Iranian capital is cold, grey, and complicated. From November into February, cold air sinks off the snowbound peaks and sits trapped in the Tehran basin, creating an inversion layer that locks in urban emissions. Daytime highs often hover in single digits, and raw, damp winds leave mornings feeling biting.
Yet winter has its own interior pulse. In February, cinema enthusiasts and filmmakers brave the chill for the Fajr International Film Festival, packing downtown theaters and art-house screens for premieres that lend the city a vibrant cultural buzz. Life retreats inside warm cafes scented with cardamom, carpeted basements, and steamy soup shops serving steaming bowls of herb-rich ash. By late March, as Persian New Year approaches, rain sweeps the pollution away and the Alborz glistens under fresh powder, setting the stage for spring once again.