Planning a trip to Cusco in September? You are in luck! The weather is generally good, with an average maximum temperature of +17°C and approximately 2 sunny days. Just be prepared for some rain, as there are usually around 25 rainy days and 41 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flightsin one click on Avionero.
Average weather
☀️
+17°C
Avg. max. temperature
0°C
Min.
+22°C
Max.
41 mm
Total precipitation
67%
Avg. humidity
1 m/s
Avg. wind
2 ☀️
Sunny Days
3 ⛅️
Cloudy
25 🌦
Rainy
Our opinion: Cusco has good weather in September.
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Average temperature in Cusco in September
Here are the expected maximum, average and minimum temperatures in Cusco for September based on the historical data.
Last Year
Historical Data
Going from a maximum of +22°C during the day to a minimum of +4°C during the night, the temperature in September averages around +19°C.
The average maximum temperature goes up 11% by the end of the month, compared with the beginning of the month, from +18°C to +20°C.
Is Cusco warm or cold in September?
Cusco is typically mild in September.
Maximum temperatures go up compared to the previous month from +17°C to +17°C. The minimum temperature also goes up from +4°C to +6°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Cusco:
Climate in Cusco in September
Cusco weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+17°C
+17°C
+18°C
Min. temperature
-3°C
0°C
0°C
Max. temperature
+23°C
+22°C
+23°C
Rainfall
21 mm
41 mm
86 mm
Wind
1 m/s
1 m/s
1 m/s
Humidity
63%
67%
71%
Air pressure
1019 HPa
1018 HPa
1017 HPa
Sunny days
8
2
0
Cloudy days
5
3
1
Rainy days
18
25
29
Snowy days
0
0
0
September weather is still as good as in August.The temperature levels stay the same in the area of +17°C for average maximum temperature during the day.Prepare for more rain. Average rainfall goes from 21 mm to 41 mm.Humidity rises from 63% to 67%.The average wind speed doesn’t change much during September, staying around 1 m/s.The days becoming less sunny, going from 8 sunny days in August to 2 in September.
October brings much the same weather, it remains good.
Wind speed in Cusco in September based on historical data.
Last Year
Historical Data
The average wind speed is 2 m/s getting up to 2 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Cusco is gradually increasing during September, going from 2 m/s to 2 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Cusco based on historical data.
Last Year
Historical Data
Typically, there is a 60% chance of rain on an average day in September, with total rainfall of approximately 46 mm. The maximum amount of rainfall per day is around 13 mm, which is considered light rain.September is a pretty wet month with over 18 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Cusco wettest month is January, where a typical day has a 97% chance of precipitation and 233 mm of rainfall per day. July, on the other hand, is the driest month with a mere 39% chance of precipitation and 11 mm of rainfall per day.
How was the weather last September in Cusco?
This is the weather in Cusco in September 2025:
1 September
☁️
+18°C
2 September
☁️
+20°C
3 September
☁️
+18°C
4 September
☁️
+19°C
5 September
☁️
+19°C
6 September
🌧️
+16°C
7 September
☁️
+19°C
8 September
☁️
+20°C
9 September
☀️
+21°C
10 September
☀️
+19°C
11 September
☁️
+20°C
12 September
☁️
+19°C
13 September
☁️
+17°C
14 September
☁️
+19°C
15 September
☁️
+18°C
16 September
☁️
+19°C
17 September
🌧️
+18°C
18 September
☁️
+18°C
19 September
☁️
+19°C
20 September
☁️
+19°C
21 September
☁️
+20°C
22 September
☁️
+20°C
23 September
☀️
+21°C
24 September
☁️
+20°C
25 September
☁️
+22°C
26 September
☁️
+22°C
27 September
☁️
+21°C
28 September
☁️
+20°C
29 September
🌧️
+16°C
30 September
☁️
+20°C
In September 2025 Cusco had 3 sunny days, 24 cloudy days, and 3 rainy days. The average maximum temperature was +19°C, with an absolute maximum of +22°C and a minimum of +16°C. The average humidity was 65%, with a maximum of 100% and a minimum of 22%. The average wind speed was 2 m/s, with a maximum of 8 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change over Years
This is how Cusco climate have been changing during last 43 years period.
The climate in Cusco in September has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+15°C) and the highest in 2024 (+19°C). The driest year was 2022 with only 948 mm of rainfall, and the wettest year was 1985 with 1612 mm.
FAQ
Frequently asked questions about the weather in Cusco in September:
Is September a good time to visit Cusco?
September is a really good time to go to Cusco. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Cusco.
Can you sunbathe in Cusco in September?
September has mild temperatures in Cusco. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Is Cusco rainy in September?
Cusco is usually dry in September. Plan your packing around outdoor activities and exploring.
Is it sunny in Cusco in September?
Usually, it’s not very sunny in Cusco in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Cusco, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
