Iran Weather & Climate Guide 2025
Plan your trip with detailed weather information and seasonal tips for Iran.
Discover Iran's ancient Persian heritage, stunning Islamic architecture, and warm hospitality. From the grand bazaars of Tehran to the architectural marvels of Isfahan and the poetic gardens of Shiraz, Iran offers travelers a journey through 2,500 years of history and culture.
Best Time to Visit
Best Months
March-May, September-November
Months to Avoid
July-August, January
Climate Overview
Iran has a remarkably diverse climate due to its vast size and varied topography. The central plateau experiences a continental arid climate with scorching summers and cold winters, while the Caspian coast enjoys a subtropical humid climate with heavy rainfall and mild temperatures year-round. The Persian Gulf coast is extremely hot and humid in summer but pleasantly warm in winter. The Alborz and Zagros mountain ranges create distinct microclimates and host Iran's ski resorts. Most of Iran's famous historic cities - Tehran, Isfahan, Shiraz, and Yazd - experience a semi-arid climate with four distinct seasons, best visited in spring and autumn.
Month-by-Month Guide
What to expect each month of the year.
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Seasonal Planning Guide
Complete weather data, packing lists by season, and event calendars.
Seasonal Breakdown
Detailed information for each season.
🌸 Spring
Mar-May
Iran's most beautiful season when wildflowers carpet mountain slopes, Persian gardens bloom, and Nowruz celebrations bring the country to life. Temperatures are pleasantly mild across most of Iran.
☀️ Summer
Jun-Aug
Extremely hot in central Iran and the Persian Gulf (40-50C). The Caspian coast is humid and busy. Alborz and Zagros mountains offer cool refuge. Tehran can be smoggy and uncomfortable.
🍂 Fall
Sep-Nov
Excellent season with clear skies, cooling temperatures, and autumn foliage in northern forests and mountain slopes. One of the two best times to visit Iran for all activities.
❄️ Winter
Dec-Feb
Cold to very cold in most of Iran with snow in mountains and highland areas. Isfahan and Shiraz are cold but manageable (5-10C). Persian Gulf islands like Kish are warm and pleasant (20-25C) - winter's best kept secret.
What to Pack
Seasonal packing recommendations.
Year-Round Essentials
- Modest clothing (cover shoulders and knees)
- Comfortable walking shoes
- Sun protection (hat, sunscreen, sunglasses)
- Light scarf or shawl (for religious sites)
- Reusable water bottle
- Power adapter
- Basic first aid kit
Hot Weather Additions
- Lightweight, breathable fabrics
- Extra sun protection
- Cooling towel
- Light colors to reflect heat
- Sandals with back straps
Cool Weather Additions
- Warm layers (fleece, sweater)
- Light jacket or coat
- Rain gear (umbrella, waterproof jacket)
- Closed-toe shoes
- Warm accessories (if winter)
Events & Crowd Levels
Plan around busy periods and special events.
🔴 High Season
Nowruz period (late March-early April) and spring school holidays see the heaviest domestic tourism. Summer (July-August) brings Tehranis to the Caspian coast.
Higher prices, advance booking essential, crowded attractions.
🟡 Shoulder Season
April-May and September-October are the sweet spot with excellent weather and manageable crowds. International tourist numbers are highest during these months.
Good balance of weather and crowds. Reasonable prices.
🟢 Low Season
November-February (excluding Nowruz preparations) sees the fewest tourists. Sites are uncrowded but shorter daylight and cold temperatures in northern Iran are trade-offs.
Best deals, fewer tourists. Some services may be limited.
Major Events & Holidays
Iran's most important celebration marking spring equinox and new year. Entire country celebrates with family gatherings, Haft-Sin tables, spring cleaning, and trips. Tourist sites very crowded but experiencing Nowruz is magical. Book accommodation well in advance.
Fire festival where people jump over bonfires to cleanse away bad luck and welcome new year. Fireworks, street parties, and celebrations throughout Iran. Ancient Zoroastrian tradition still widely practiced.
Islamic holy month of fasting. Muslims don't eat/drink during daylight hours. Many restaurants closed during day, reduced hours. Respectful not to eat publicly during daylight. After sunset (Iftar) festive atmosphere with special foods. Experience unique cultural aspect but expect some inconveniences.
Major film festival in Tehran showcasing Iranian and international cinema. Good opportunity to experience Iran's vibrant film culture and industry.
Traditional rose water distillation in villages near Kashan, particularly Qamsar and Niasar. Witness ancient process, fragrant roses everywhere, traditional ceremonies. Unique cultural experience in beautiful spring setting.
Major Shi'a religious observance commemorating martyrdom of Imam Hussein. Processions, passion plays (Ta'zieh), and mourning ceremonies especially in major cities. Fascinating cultural insight but many closures and somber atmosphere. Photography often restricted.
Plan Your Perfect Iran Trip
Get our complete seasonal guide with detailed packing lists, event calendars, and month-by-month planning tips.
Download Weather Guide