How warm is it in Cusco in September?

Daytime highs averaged 16.2 °C, night-time lows 4.3 °C. The highest value of the past 10 years was 21.7 °C (26 Sep 2023), the lowest 0.4 °C (5 Sep 2019).

How often does it rain in Cusco in September?

On average there were 3.1 rain days (at least 1 mm) with 11.7 mm of precipitation in total. In 3 of 10 years there was no rain day at all.

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Cusco weather in September: temperature & rain

Photo: tomscoffin · CC BY 2.0

🇵🇪 Weather in Cusco in September

This is what the weather in Cusco (Peru) was like in September over the years 2017–2026.

Key facts at a glance

Prevailing weather: Partly cloudy

Avg. daytime high

16.2 °C

14.8 °C – 17.6 °C

Avg. night-time low

4.3 °C

3.2 °C – 4.9 °C

Avg. rain days in period

3.1

10 % of days · ≥ 1.0 mm

Avg. precipitation in period

11.7 mm

2.7 mm – 23.2 mm

Avg. cloud cover

57 %

This data source has no sunshine hours – average cloud cover is shown instead.

Avg. sea temperature

–

No sea nearby – no sea temperature.

Extremes: Highest temperature 21.7 °C (26 Sep 2023) · Lowest temperature 0.4 °C (5 Sep 2019) · Avg. daily peak wind 22 km/h

Weather mix of all days

21Sunny
165Partly cloudy
61Cloudy
26Light rain
1Rain
4Snow

Summary

On average 16.2 °C during the day and 4.3 °C at night.
On average 3.1 rain days (Rain day = at least 1.0 mm of precipitation) with 11.7 mm of precipitation in total.
In 3 of 10 years there was not a single rain day.
Prevailing weather: Partly cloudy.
Warmest year: 2024 (avg. 17.6 °C), coolest: 2018 (avg. 14.8 °C).
Wettest year: 2026 (23.2 mm), driest: 2020 (2.7 mm).
Extremes: 21.7 °C on 26 Sep 2023 and 0.4 °C on 5 Sep 2019.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max16.8°Avg. min4.7°
Rain days
8 Rain days
Precipitation
23.2 mm
Avg. cloud cover
–
Sea temperature
–
Max 20.9 °C · Min 1.8 °C
2025
Avg. max15.7°Avg. min4.0°
Rain days
0 Rain days
Precipitation
4.5 mm
Avg. cloud cover
62 % cloudy
Sea temperature
–
Max 18.5 °C · Min 1.4 °C
2024
Avg. max17.6°Avg. min4.9°
Rain days
4 Rain days
Precipitation
14.1 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 20.4 °C · Min 2.8 °C
2023
Avg. max16.2°Avg. min4.7°
Rain days
5 Rain days
Precipitation
13.9 mm
Avg. cloud cover
62 % cloudy
Sea temperature
–
Max 21.7 °C · Min 2.7 °C
2022
Avg. max16.6°Avg. min4.6°
Rain days
4 Rain days
Precipitation
11.2 mm
Avg. cloud cover
64 % cloudy
Sea temperature
–
Max 20.2 °C · Min 1.7 °C
2021
Avg. max15.9°Avg. min4.5°
Rain days
0 Rain days
Precipitation
2.8 mm
Avg. cloud cover
58 % cloudy
Sea temperature
–
Max 18.6 °C · Min 3.0 °C
2020
Avg. max15.7°Avg. min4.1°
Rain days
1 Rain days
Precipitation
2.7 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 18.9 °C · Min 2.4 °C
2019
Avg. max16.5°Avg. min4.1°
Rain days
4 Rain days
Precipitation
18.9 mm
Avg. cloud cover
56 % cloudy
Sea temperature
–
Max 19.2 °C · Min 0.4 °C
2018
Avg. max14.8°Avg. min3.2°
Rain days
0 Rain days
Precipitation
2.8 mm
Avg. cloud cover
54 % cloudy
Sea temperature
–
Max 18.6 °C · Min 0.7 °C
2017
Avg. max16.2°Avg. min4.3°
Rain days
5 Rain days
Precipitation
22.9 mm
Avg. cloud cover
50 % cloudy
Sea temperature
–
Max 19.3 °C · Min 1.8 °C

Frequently asked questions

How warm is it in Cusco in September?: Daytime highs averaged 16.2 °C, night-time lows 4.3 °C. The highest value of the past 10 years was 21.7 °C (26 Sep 2023), the lowest 0.4 °C (5 Sep 2019).
How often does it rain in Cusco in September?: On average there were 3.1 rain days (at least 1 mm) with 11.7 mm of precipitation in total. In 3 of 10 years there was no rain day at all.

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. Snow depth is the model value for the grid cell, not the depth on the slopes. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)