Annual weather and forecast

	Place	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Weather	Cusco
	Inca Trail
	Machu Picchu
Day/night temp. (in ºC) Day/night temp. (in ºF)	Cusco	19ºC 7ºC 66ºF 45ºF	19ºC 7ºC 66ºF 45ºF	19ºC 6ºC 66ºF 43ºF	20ºC 5ºC 68ºF 41ºF	20ºC 3ºC 68ºF 37ºF	19ºC 1ºC 66ºF 34ºF	19ºC 0ºC 66ºF 32ºF	20ºC 2ºC 68ºF 36ºF	20ºC 4ºC 68ºF 39ºF	21ºC 6ºC 70ºF 43ºF	21ºC 6ºC 70ºF 43ºF	21ºC 7ºC 70ºF 45ºF
	Inca Trail	18ºC 7ºC 64ºF 45ºF	18ºC 8ºC 64ºF 46ºF	19ºC 8ºC 66ºF 46ºF	19ºC 7ºC 66ºF 45ºF	19ºC 4ºC 66ºF 39ºF	19ºC 1ºC 66ºF 34ºF	19ºC 0ºC 66ºF 32ºF	19ºC 3ºC 66ºF 37ºF	19ºC 5ºC 66ºF 41ºF	19ºC 6ºC 66ºF 43ºF	19ºC 5ºC 66ºF 41ºF	19ºC 7ºC 66ºF 45ºF
	Machu Picchu	21ºC 11ºC 70ºF 52ºF	21ºC 11ºC 70ºF 52ºF	21ºC 10ºC 70ºF 50ºF	20ºC 9ºC 68ºF 48ºF	20ºC 8ºC 68ºF 46ºF	20ºC 8ºC 68ºF 46ºF	20ºC 8ºC 68ºF 46ºF	20ºC 9ºC 68ºF 48ºF	20ºC 9ºC 68ºF 48ºF	20ºC 9ºC 68ºF 48ºF	20ºC 9ºC 68ºF 48ºF	21ºC 10ºC 70ºF 50ºF
Rain (in mm) Rain (in inches)	Cusco	160 6.3	133 5.2	108 4.3	44 1.7	9 0.4	2 0.1	4 0.2	8 0.3	22 0.9	47 1.9	79 3.1	120 4.7
	Inca Trail	142 5.6	114 4.5	102 4.0	41 1.6	8 0.3	3 0.1	3 0.1	8 0.3	20 0.8	48 1.9	66 2.6	107 4.2
	Machu Picchu	428 16.9	364 14.3	298 11.7	121 4.8	24 0.9	5 0.2	11 0.4	21 0.8	54 2.1	119 4.7	218 8.6	317 12.5

Fahrenheit/in Celsius/mm

Months to avoid

Possible months

Ideal months

Conclusions

As you can see, there is not a perfect time (sunny, warm and dry months). You have to compromise according to your desires, if the rain bothers you more or if you are sensitive to cold.

Howerver, we can say that (from the worst to the best time of year):

February is excluded because the Inca Trail is closed for maintenance the whole month.
January and March are to avoid if possible because of the rain.
April, November and December are a good compromise between an almost warm temperature and a nice weather.
May and October offer a nice weather with fresh temperatures.
June, July, August and September are, to us, the best time of year because the weather is very nice even if nights are cool but there is almost no rain.

Current weather and forecast for Cusco and Aguas Calientes

Cusco - Current weather ( 4:00 pm)
	Temperature: 59˚ F Conditions: Shower In Vicinity Relative humidity: 55 % Pressure: 1030 mb Wind: 6 mph

Machu Picchu - Current weather ( 3:00 pm)
	Temperature: 54˚ F Conditions: Patches Of Fog Relative humidity: 67 % Pressure: 1034 mb Wind: 14 mph

Forecast for Cusco
Mon 18 12:00 pm		Temperature: 42˚F \| 59˚F Conditions: Patchy rain possible Wind: 7 mph
Tue 19 12:00 pm		Temperature: 44˚F \| 59˚F Conditions: Patchy light rain Wind: 5 mph
Wed 20 12:00 pm		Temperature: 44˚F \| 58˚F Conditions: Patchy rain possible Wind: 4 mph
Thu 21 12:00 pm		Temperature: 44˚F \| 55˚F Conditions: Patchy light drizzle Wind: 7 mph
Fri 22 12:00 pm		Temperature: 42˚F \| 60˚F Conditions: Patchy rain possible Wind: 4 mph

Forecast for Machu Picchu
Mon 18 12:00 pm		Temperature: 44˚F \| 62˚F Conditions: Patchy light drizzle Wind: 5 mph
Tue 19 12:00 pm		Temperature: 47˚F \| 67˚F Conditions: Partly cloudy Wind: 8 mph
Wed 20 12:00 pm		Temperature: 46˚F \| 64˚F Conditions: Partly cloudy Wind: 9 mph
Thu 21 12:00 pm		Temperature: 44˚F \| 65˚F Conditions: Partly cloudy Wind: 9 mph
Fri 22 12:00 pm		Temperature: 45˚F \| 64˚F Conditions: Partly cloudy Wind: 9 mph