High humidity and regular heavy rain across the Amazon and Andean highlands; coastal Lima tends to be mild and overcast with cool sea breezes. Trekking routes in the highlands are often muddy and some higher passes can be slippery.
Average daily low and high (°C) and monthly rainfall. The badge shows how it feels, allowing for humidity.
Average temperature across Peru in January.
Tumbes & Piura
Midday heat dominates January along the beaches of Máncora and Vichayito, where temperatures top 30°C and tropical downpours become more frequent; this is also the start of the brief rainy pulse that can swell rivers and close backroads after heavy storms. Expect humid, sticky air and strong sun - pack light clothing, a hat and insect repellent. Ferry services to offshore islands run but watch for sudden seas with squalls.
Lima, Paracas, Ica
Sky-hugging gray is common along Lima’s coast in January, yet temperatures are pleasantly warm inland and Paracas or Huacachina feel summery with highs often in the high 20s-low 30s°C. The sea is calm and favorable for boat tours to the Ballestas Islands; bring sunscreen and a light layer for evenings on the Malecón. Lima’s gastronomic scene is busy with both local and international visitors, so reserve top restaurants ahead of time.
Nasca, Arequipa lowlands
High desert sun greets January on the Nazca plateau - mornings have a dry warmth that escalates into hot afternoons ideal for Nazca line flights when air is stable. Arequipa’s lower valleys feel warm and very sunny; the colonial city is lively and outdoor dining runs late into the evening. Keep hydrated in the mid-day heat and book Nazca flights early to avoid afternoon thermals.
Huaraz, Cajamarca, Ancash
January is in the middle of the rainy season for the Cordillera Blanca - Huaraz and its mountain trails see daily afternoon downpours and some thunder, which makes high passes slippery and rivers full. Snow at high elevations can appear after heavy convective storms; many classic treks are muddy and sometimes impassable. If you’re here for climbing, expect limited weather windows and plan extra buffer days.
Cusco, Sacred Valley, Puno, Colca
January is deep in the rainy season around Cusco and the Sacred Valley; heavy afternoon showers are frequent and the classic trails are sodden and sometimes closed. Machu Picchu is lush and waterfalls are at peak volume, but expect mist, slippery steps and fewer inca-trail permits (February closure aside). If visiting, plan more time, bring waterproofs and be prepared for busier train windows on clearer days.
Loreto, Madre de Dios & Manu
January is typically in the heart of the rainy season across Loreto and Madre de Dios: heavy tropical downpours are common and river levels are high, making water travel the main way to reach many lodges. Mosquito activity and humidity peak, so bring repellent and light, long-sleeved clothing. Floodplain wildlife is abundant and the forest is intensely green, but some remote trails will be submerged.
There are no major festivals or events in Peru during January to be aware of.
See how January compares with the rest of the year, then read the full guide.