Ideal periods

Note that you can consult the actual weather

The 5 cities in the following sheet could give you a general idea about weather conditions in Peru.
You must notice that:

It never rains on the coast.
In the mountains, the rainy season is summer (local).
In the Amazon, weather is warm the whole year except for summer and its heatwave periods.

In the following chart, colors are:
Ideal periods	Periods eventually good	Periods to avoid

	Lima (on the coast)	Cuzco (in the east)	Iquitos (in the North, the Amazon)	Huar�z (in the north)	Puno (in the south)
January
February
March
April
May
June
July
August
September
October
November
December

The best periods are in fact, if you have to visit Peru entirely or by areas: April, May, July, August, September, November and December. If you only stay in Lima, prefer January, February and March.