Best Time to Visit Iran

Iran (Persian: ایران, Irān) is a large country with a diverse climate. Conditions vary by region and altitude, so the best time to go depends primarily on where you are heading rather than on the calendar alone. A single month can be mild on the central plateau, hot on the southern coast, cold and snowbound in the mountains, and warm and humid by the Caspian Sea.

This guide sets out the best windows for each part of the country, the dates to avoid, and the practical details — visas, transport, money, health, safety, and connectivity — that apply whenever you travel.

Best Overall Time to Visit

For a countrywide itinerary taking in the main plateau cities — Tehran, Isfahan, Shiraz, and Yazd — the two best windows are spring, from mid-April to mid-May, and autumn, from mid-September to mid-October. In both periods temperatures across the central plateau are mild and suited to long days of sightseeing.

These windows avoid the extreme inland heat of high summer and the cold of deep winter in the north and west. If your plan is a loop through the historic cities, target one of these two periods.

Climate by Region

Iran's climate splits into several distinct zones. Choose your timing by destination.

Central Plateau and Desert Cities

Tehran sits on the central plateau at around 1,200 metres. January temperatures run roughly 1 to 8°C; July is hot and dry, roughly 25 to 37°C.

Yazd and the central desert, at around 1,240 metres, see roughly 1 to 13°C in January and 26 to 40°C in July, with very low annual rainfall of about 50 millimetres. For these cities, April–May and September–October are the comfortable windows.

The Dasht-e Lut desert, inscribed as a UNESCO World Heritage Site in 2016, is the hottest area. A land-surface temperature of 70.7°C was recorded there in 2005, among the highest measured anywhere on Earth (this is a surface, not air, temperature). The Lut should not be explored in summer. These temperature figures are typical and approximate; as of June 2026, confirm current conditions through up-to-date sources before you travel.

Caspian Coast

The Caspian coast — Rasht, and the wider Gilan and Mazandaran provinces — is Iran's wettest and greenest region. Rasht sees roughly 4 to 12°C in January and 22 to 30°C in July, and receives about 1,385 millimetres of rain a year. Summers here are humid rather than very hot, with thunderstorms, so the coast stays comfortable when the interior is at its hottest.

Persian Gulf and the Southern Coast

The Persian Gulf south, around Bandar-e Abbas, runs roughly 12 to 23°C in January and 31 to 38°C in July with high humidity. The best months are December to February.

The Gulf islands of Kish and Qeshm are best from November to March, with temperatures of roughly 18 to 27°C; summers are very hot and humid. As of June 2026 these temperature ranges are indicative and drawn largely from travel-operator sources, so confirm current conditions before you book.

Mountains

The northern and western mountains can be very cold and snowbound in deep winter, and roads may close. High-altitude trekking is best from late spring to early autumn.

Season by Season

Spring (Mid-April to Mid-May)

One of the two best windows for the plateau cities, with mild temperatures. The spring season opens with Nowruz (see below), a major domestic travel period in late March.

Summer (July–August)

Months to avoid across most regions. Summer brings extreme dry heat inland and across the central desert plateau (Yazd, Kerman), where sightseeing is uncomfortable to dangerous, and humid heat on the Persian Gulf. The exception is the Caspian coast, which stays warm, humid, and green.

Autumn (Mid-September to Mid-October)

The second prime window for a countrywide itinerary, with mild temperatures returning to the plateau.

Winter (Roughly December–February)

Winter is ski season and the prime season for the warm south. The ski resorts of Dizin, Shemshak, and Tochal lie around 70 kilometres north of Tehran and generally run from late November to early May, with January and February offering the best snow conditions. Dizin is Iran's largest resort and has the longest season, running from early December to late May. As of June 2026, resort opening and closing dates shift year to year with snowfall; confirm current dates on the official resort sources before you travel.

At the same time, the Persian Gulf islands and the southern coast are pleasant from November to March, for beaches and sightseeing. Deep winter is the season to avoid the northern and western mountains, where cold is severe and roads may close.

Nowruz: The Dates to Plan Around

Nowruz (نوروز), the Persian New Year, begins on the vernal equinox — 20 March in 2026. Iran officially observes four public holidays, on the 1st to 4th of Farvardin, within a broader celebration of about two weeks.

Nowruz triggers a large domestic travel surge: hotels fill, prices rise, and sites are crowded. The exact number of consecutive days that schools and workplaces close is not uniformly reported. If you want to experience the festivities, book well ahead; otherwise, plan around these dates.

Visa and Entry

As of June 2026, entry requirements for Iran change with nationality and with the political situation, and were not part of the verified research for this guide. Confirm the current visa rules, eligibility, and application process with the Iranian authorities or your nearest Iranian consulate, and through an official source, before you travel.

Getting Around

Iran's main cities are spread across a large country, so most countrywide itineraries combine domestic flights with road travel. Plan timing around the season: in deep winter, mountain roads in the north and west may close, and around Nowruz domestic transport and hotels are heavily booked.

Money and Costs

Around Nowruz, accommodation prices rise with demand. Beyond that, this guide does not cover specific prices; as of June 2026, confirm current rates locally, as costs and exchange arrangements can shift.

Health

Heat is the principal seasonal health risk. Inland and desert sightseeing in July and August ranges from uncomfortable to dangerous, and the Dasht-e Lut in particular should not be visited in summer. Plan strenuous activity for the cooler parts of the day and the cooler months, and carry water. For specific vaccination advice, consult a travel-health professional before departure.

Safety

Match your activity to the season. High-altitude trekking is best from late spring to early autumn; in deep winter the northern and western mountains can be snowbound and roads may close. Avoid the central desert and the Dasht-e Lut in the summer heat.

Connectivity

Practical communications details were not part of the verified research for this guide. As of June 2026, confirm current SIM, internet, and app availability through up-to-date sources before you travel.

Language Basics

The official language is Persian (Farsi, فارسی), written in the Perso-Arabic script. The New Year festival is Nowruz (نوروز). The first month of the Iranian calendar, during which the Nowruz public holidays fall, is Farvardin (فروردین).

At a Glance: Best Window by Region

• Central plateau and desert cities (Tehran, Isfahan, Shiraz, Yazd): April–May and September–October.
• Caspian coast (Rasht, Gilan, Mazandaran): late spring and summer, when the interior is at its hottest.
• Persian Gulf islands and southern coast (Kish, Qeshm, Bandar-e Abbas): November–March.
• Ski resorts (Dizin, Shemshak, Tochal): December to February or March; Dizin's season runs early December to late May.
• Mountains and high-altitude trekking: late spring to early autumn.

Temperature figures in this guide are typical monthly averages and should be treated as approximate. As of June 2026, confirm current conditions, rates, opening dates, and entry rules locally or through official sources before you travel.