Santiago de Cao climate — normals and trends
Santiago de Cao (Peru) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 19.1 °C and it receives 101 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is February (22.4 °C on average) and the coldest is September (16.8 °C). Rainfall peaks in March.
Santiago de Cao averages 0 frost days, 0 hot days (≥ 30 °C) and 19 rainy days per year.
No statistically significant temperature trend emerges for Santiago de Cao between 1940 and 2025: over this span, year-to-year swings outweigh the climate signal.
The hottest day of the period reached 29.1 °C (on 15 February 1998) and the coldest 12.0 °C (on 13 October 1954).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Santiago de CaoLa Libertad
- coords
- -7.96°, -79.24°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
19.1°C
Average daily high
20.7°C
Average daily low
17.9°C
Annual rainfall
101mm
Sunshine / day
11.1h
Mean relative humidity
89%
Average peak wind
20.6km/h
Seasonal range
5.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
19 d/yr
Annual snowfall
0.0 cm
Average feels-like high
22.3 °C
Average feels-like low
18.3 °C
Average peak gust
30.8 km/h
Tropical nights (≥ 20 °C)
81 d/yr
Solar radiation
21.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
No clear trend over this period
Over a short window, year-to-year swings outweigh the climate signal. Try 86 years.
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
29.1 °C
15 February 1998
Coldest day
12.0 °C
13 October 1954
Wettest day
137 mm
22 May 1941
Windiest day
34.2 km/h
15 April 1962
Strongest gust
50.8 km/h
15 April 1962
Hottest feels-like
35.0 °C
12 March 1998
Coldest feels-like
9.7 °C
19 October 1954
Sunniest day
12.5 h
24 December 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 21.8 °C | -1.0 °C | 11 mm | -0 mm |
| Feb | 24.8 °C | +0.7 °C | 16 mm | -2 mm |
| Mar | 24.3 °C | +0.2 °C | 21 mm | -1 mm |
| Apr | 22.0 °C | -0.3 °C | 3 mm | -8 mm |
| May | 20.5 °C | -0.3 °C | 4 mm | -5 mm |
| Jun | 20.2 °C | +0.5 °C | 2 mm | -3 mm |
| Jul | 19.5 °C | +0.6 °C | 7 mm | +1 mm |
| Aug | 18.7 °C | +0.2 °C | 5 mm | +1 mm |
| Sep | 18.3 °C | -0.1 °C | 4 mm | +1 mm |
| Oct | 18.6 °C | 0.0 °C | 10 mm | +7 mm |
| Nov | 19.2 °C | -0.3 °C | 7 mm | +4 mm |
| Dec | 19.9 °C | -1.2 °C | 2 mm | -3 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Santiago de Cao?
Santiago de Cao has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 19.1 °C and it receives 101 mm of precipitation per year.
What is the hottest day ever recorded in Santiago de Cao?
The hottest day measured in Santiago de Cao between 1940 and 2025 was 15 February 1998, reaching 29.1 °C.
What is the coldest day in Santiago de Cao?
The coldest day measured in Santiago de Cao between 1940 and 2025 was 13 October 1954, at 12.0 °C.
Does it snow in Santiago de Cao?
Almost never: Santiago de Cao sees virtually no snow, with about 0 frost days per year.
Has the climate of Santiago de Cao warmed?
Between 1940 and 2025, no statistically significant temperature trend emerges in Santiago de Cao.
What is the wettest day in Santiago de Cao?
The wettest day measured in Santiago de Cao between 1940 and 2025 was 22 May 1941, with 137 mm of rain in 24 hours.
What was the windiest day in Santiago de Cao?
The windiest day measured in Santiago de Cao between 1940 and 2025 was 15 April 1962, with winds reaching 34.2 km/h.
What is the warmest month in Santiago de Cao?
The warmest month in Santiago de Cao is February (22.4 °C on average); the coldest is September (16.8 °C).
How much does it rain in Santiago de Cao?
Santiago de Cao receives on average 101 mm of precipitation per year, spread over about 19 rainy days.
Is it sunny in Santiago de Cao?
Santiago de Cao gets on average 11.1 hours of sunshine per day, roughly 4,052 hours per year over 1940-2025.
Are there tropical nights in Santiago de Cao?
Yes: Santiago de Cao has on average 81 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Santiago de Cao?
In Santiago de Cao, between 1940 and 2025, the highest apparent temperature reached 35.0 °C on 12 March 1998, and the lowest was 9.7 °C on 19 October 1954.
Compare Santiago de Cao with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Santiago de Cao