| Jan | Rainy Afternoon showers, lush trails | Summer ✓ Warm, sunny 25–30°C | High Water Boat access, wildlife | India school holidays — coastal/Amazon focus |
| Feb | Inca Trail Closed Maintenance | Summer Beach weather | Peak Rain Lush, boat-only trails | Avoid Andean trekking; focus coast/Amazon |
| Mar | Transition Rains easing | Late Summer Warm, clearing | High Water River levels dropping | Good post-Holi shoulder window |
| Apr | Dry Start ✓ Excellent trekking | Shoulder Mild, fog lifting | Transition Good visibility | Trail reopens; fewer crowds, better rates |
| May | Peak Dry ✓✓ Clear skies, cold nights | Winter Start Overcast, cool | Dry Start Accessible trails | Ideal for Indian trekkers — book Machu Picchu early |
| Jun | Winter/Dry Sunny days, freezing nights | Winter Grey, humid 12–18°C | Dry Season Wildlife concentrated | India summer holidays align — peak booking window |
| Jul | Peak Dry ✓✓ Best Machu Picchu weather | Winter Coastal fog persists | Dry Hiking trails open | Peak tourist season — book 4–6 months ahead |
| Aug | Dry Season Clear, busy with trekkers | Late Winter Mild, occasional drizzle | Dry Good wildlife spotting | Good post-monsoon planning from India |
| Sep | Late Dry ✓ Warming days, stable | Spring Start Coastal clearing | Transition Variable conditions | Shoulder season — better rates, fewer crowds |
| Oct | Rain Return Occasional showers, lush | Spring ✓ Pleasant, warming | Wet Start Heavier rains begin | Good pre-Diwali travel window |
| Nov | Wet Season Starts Rains increase | Late Spring Warm, sunny | High Water Boat routes expand | Off-season discounts; verify trail conditions |
| Dec | Full Wet Heavy rain possible | Summer ✓ Beach weather 25–30°C | Peak Rain Flooded trails, wildlife | India school holidays — coastal/Amazon focus |