There is no single best month
Cappadocia can be visited throughout the year, but the experience changes with weather, daylight, visitor numbers and the activities you care about most. The best time for one traveller may not suit another.
Spring
Spring usually brings milder days and greener landscapes, but weather can still change quickly. If a balloon flight or long hike is important to you, keep some flexibility rather than building the whole trip around one morning.
Summer
Summer has long daylight hours and generally easier road conditions, but popular hotel areas can be busier. If your flight arrives late in the evening, confirm the airport transfer in advance so you are not trying to arrange transport after landing.
Autumn
Autumn is popular for walking and sightseeing because the hottest part of summer has passed. As with spring, weather and balloon operations still vary from day to day.
Winter
Winter can bring snow, ice and colder conditions. Roads normally remain in use, but weather can affect journey times, so allow more flexibility around airport transfers and early flights.
Plan the airport first
Whatever the season, compare both Kayseri (ASR) and Nevsehir (NAV) for your actual travel date. Flight schedules matter more than a general rule about which airport is “best.”
See Kayseri or Nevsehir Airport? and the current transfer prices before booking.