Arequipa is one of the sunniest cities in South America, which makes timing easier than in many Andean destinations. The city lies in a high desert valley, so rainfall is low and skies are often blue. The bigger variable is what you plan to do beyond the city, because Colca Canyon, the volcanoes and the high plateaus sit at much greater altitudes with their own weather. This guide explains the seasons, the effect on condor watching and trekking, and how to plan around festivals and holidays.
The dry season, April to November
This is the main travel season, with clear skies, cold nights and warm to hot days. For Colca and the volcanoes it is the best period, because roads are more reliable, views are sharp and trekking conditions are safer. Condor sightings at the Cruz del Condor are often good in the mornings, though birds cannot be guaranteed. Nights in the highlands can fall well below freezing, so bring serious warm layers for the canyon, especially from June to August when the nights are coldest. Crowds are higher in July and August, and hotels and tours book up in advance.
The wet season, January to March
Rain is more likely in the afternoons, especially in the highlands, and clouds can hide the volcanoes. The landscape turns green, rivers run fuller, flamingos can be more active at the Salinas lagoon, and rafting on the Chili river is more exciting. Colca tours still run, but road delays and landslides are possible, and trekking trails can be slippery. In the city, showers are usually short and many sights remain accessible. Rates are often lower and crowds thinner, so it can be a good time for flexible travellers who accept some weather risk.
Shoulder months
April to May and October to November offer a good balance, with decent weather, fewer visitors and fair prices. In these months the days are warm, the nights cool, and the countryside is either freshly green or golden. For travellers who want both comfort and decent conditions for Colca, shoulder months can be the best choice. Remember that weather in the mountains is variable, so always pack layers and a rain jacket.
Festivals and holidays
Arequipa celebrates its anniversary in mid-August with parades, concerts and fireworks, and the city is lively and busy. Peruvian national holidays in late July bring crowds, and Holy Week also draws visitors. In the Colca Valley, village festivals feature traditional dances and music, including the wititi. Book accommodation and tours well ahead for these periods, and expect higher prices. If you prefer quiet, avoid the main holiday dates.
Packing and practical tips
Whatever the season, the sun at altitude is strong, so bring sun cream, sunglasses and a hat. Temperatures swing from warm afternoons to cold evenings, so layers are the answer. A light rain jacket is useful from January to March, and a warm hat and gloves are wise for Colca and volcano trips at any time. Take it slowly on the first day to adjust to altitude, and keep your schedule flexible so you can move a big tour to a clearer day if the weather turns. Booking a flexible hotel rate helps.
Altitude by destination
Arequipa is about 2,300 metres, Chivay around 3,600, Cabanaconde around 3,300, the Salinas lagoon about 4,300 and the pass on the Colca road over 4,800. Planning your sequence so that you rise gradually, starting in Arequipa, then going to Chivay, then to higher passes, is kinder than dashing straight up. If you are heading on to Puno or Cusco, which are higher still, treat Arequipa as a gentle first step.
Month-by-month snapshot
January to March is green, wet and quiet. April and May are clear and mild, an excellent time. June to August is the coldest and clearest, with the highest crowds in July and August. September to November warms up and remains mostly dry, with fewer people. December can bring the first rains in the highlands. Across the year, the city itself is sunny, so a visit to the old town and Santa Catalina works in any month, while the high-altitude trips benefit most from the dry season.
Choosing for your priorities
If your priority is trekking or volcano climbing, go in the dry season, ideally May to October. If it is condors, go between April and November and aim for early mornings. If it is photography, the dry season gives crisp air and sharp volcano views, while the wet season offers dramatic clouds and greener fields. If it is value, the wet months have the lowest prices. And if you simply want a pleasant city break, almost any month will do, as long as you pack layers and sun protection.