Tacna climate — normals and trends
Tacna (Peru) has a cold desert climate (BWk) under the Köppen-Geiger classification. Its mean annual temperature is 17.9 °C and it receives 114 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 (20.3 °C on average) and the coldest is July (15.7 °C). Rainfall peaks in February.
Tacna averages 0 frost days, 0 hot days (≥ 30 °C) and 26 rainy days per year.
Tacna has warmed by +0.9 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 29.9 °C (on 25 November 1945) and the coldest 6.1 °C (on 18 August 1960).
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
TacnaTacna
- coords
- -18.01°, -70.25°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.9°C
Average daily high
22.7°C
Average daily low
14.9°C
Annual rainfall
114mm
Sunshine / day
11.1h
Mean relative humidity
69%
Average peak wind
13.2km/h
Seasonal range
4.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
26 d/yr
Annual snowfall
0.0 cm
Average feels-like high
23.4 °C
Average feels-like low
14.6 °C
Average peak gust
29.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
22.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.21 · p = < 0.001
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
29.9 °C
25 November 1945
Coldest day
6.1 °C
18 August 1960
Wettest day
31 mm
10 February 1942
Windiest day
24.0 km/h
28 June 1941
Strongest gust
46.1 km/h
28 June 1941
Hottest feels-like
33.8 °C
4 February 1948
Coldest feels-like
3.9 °C
18 August 1960
Sunniest day
13.0 h
28 November 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 | 25.9 °C | +0.9 °C | 13 mm | -8 mm |
| Feb | 26.4 °C | +1.1 °C | 46 mm | +22 mm |
| Mar | 26.2 °C | +1.3 °C | 6 mm | -8 mm |
| Apr | 24.5 °C | +0.8 °C | 1 mm | -3 mm |
| May | 22.5 °C | +0.6 °C | 12 mm | +4 mm |
| Jun | 20.2 °C | -0.1 °C | 13 mm | +3 mm |
| Jul | 21.0 °C | +1.2 °C | 12 mm | +4 mm |
| Aug | 20.5 °C | +0.2 °C | 16 mm | +9 mm |
| Sep | 22.2 °C | +1.2 °C | 6 mm | +1 mm |
| Oct | 23.4 °C | +1.3 °C | 2 mm | +0 mm |
| Nov | 23.8 °C | +0.5 °C | 0 mm | -2 mm |
| Dec | 24.9 °C | +0.6 °C | 1 mm | -7 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 Tacna?
Tacna has a cold desert climate (Köppen BWk). Over 1940-2025, the average annual temperature is 17.9 °C and it receives 114 mm of precipitation per year.
What is the hottest day ever recorded in Tacna?
The hottest day measured in Tacna between 1940 and 2025 was 25 November 1945, reaching 29.9 °C.
What is the coldest day in Tacna?
The coldest day measured in Tacna between 1940 and 2025 was 18 August 1960, at 6.1 °C.
Does it snow in Tacna?
Almost never: Tacna sees virtually no snow, with about 0 frost days per year.
Has the climate of Tacna warmed?
Yes: Tacna warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tacna?
The wettest day measured in Tacna between 1940 and 2025 was 10 February 1942, with 31 mm of rain in 24 hours.
What was the windiest day in Tacna?
The windiest day measured in Tacna between 1940 and 2025 was 28 June 1941, with winds reaching 24.0 km/h.
What is the warmest month in Tacna?
The warmest month in Tacna is February (20.3 °C on average); the coldest is July (15.7 °C).
How much does it rain in Tacna?
Tacna receives on average 114 mm of precipitation per year, spread over about 26 rainy days.
Is it sunny in Tacna?
Tacna gets on average 11.1 hours of sunshine per day, roughly 4,052 hours per year over 1940-2025.
Are there tropical nights in Tacna?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Tacna.
What was the most extreme apparent temperature in Tacna?
In Tacna, between 1940 and 2025, the highest apparent temperature reached 33.8 °C on 4 February 1948, and the lowest was 3.9 °C on 18 August 1960.
Compare Tacna with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tacna