Generally, April and May are the best months for traveling to Iran. The second high season period for traveling to Iran is from September to mid-November. It’s recommended to book your Iran tour 3 to 6 months in advance if you want to travel to Iran during the high season. This way, you’ll have various choices for hotels and flights and can get an early bird discount. For those interested in Iran trekking tours and mountain climbing in Iran, the best time is during summer. The weather is rather hot at this time of the year (30-35 degrees); however, this won’t be a problem as vehicles and hotels are equipped with air conditioner. You can combine an adventurous Iran trekking tour with an interesting cultural tour.