Climate averages 1991–2020
Tacna weather
in December.
A warm, very dry month: the 4th warmest and the 9th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Tacna: daytime highs average 25.3°C and nights cool to about 16.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 5.6 mm of rain on roughly 1 day, which makes December a very dry month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 11 min on an average December day.
The nearest other city in this atlas is Arica (51 km away). In December its highs average 24.7°C, 0.7°C cooler than Tacna, with 4.7 mm of rain.
Among the 24 cities listed in Peru, Tacna ranks 11th of 24 for the warmest December highs and 5th of 24 for the driest December (rainfall, lowest first). The mean December high of those 24 cities is 24.6°C; Tacna is 0.8°C warmer than that mean.
From December to January, average highs rise by 1.1°C to 26.4°C, and monthly rainfall rises from 5.6 mm to 23 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tacna climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.4°C17.9°C | 17.9°C | 23 | 6.5 | 13.113 h |
| February | 26.9°C18.5°C | 18.5°C | 23 | 6.9 | 12.713 h |
| March | 26.5°C18.0°C | 18.0°C | 14 | 4.1 | 12.212 h |
| April | 24.3°C16.3°C | 16.3°C | 1.9 | 0.4 | 11.712 h |
| May | 21.6°C15.0°C | 15.0°C | 4.1 | 0.4 | 11.311 h |
| June | 19.5°C13.8°C | 13.8°C | 4.5 | 0.4 | 11.111 h |
| July | 18.9°C13.0°C | 13.0°C | 3.9 | 0.5 | 11.211 h |
| August | 19.4°C12.9°C | 12.9°C | 3.6 | 0.5 | 11.512 h |
| September | 20.5°C13.1°C | 13.1°C | 2.4 | 0.2 | 12.012 h |
| October | 21.9°C13.6°C | 13.6°C | 1.1 | 0.0 | 12.512 h |
| November | 23.7°C14.6°C | 14.6°C | 1.1 | 0.2 | 12.913 h |
| December, selected | 25.3°C16.3°C | 16.3°C | 5.6 | 1.4 | 13.213 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Arica in DecemberChile · 51 kmHigh 24.7°C · Low 17.2°C · 4.7 mm rain
- Puno in DecemberPeru · 243 kmHigh 15.2°C · Low 5.8°C · 156 mm rain
- Iquique (approximate) in DecemberChile · 245 kmHigh 25.8°C · Low 18.3°C · 0.6 mm rain
- Alto Hospicio in DecemberChile · 251 kmHigh 23.2°C · Low 15.0°C · 0.9 mm rain
- Viacha in DecemberBolivia · 257 kmHigh 14.8°C · Low 4.2°C · 110 mm rain
- La Paz in DecemberBolivia · 280 kmHigh 14.8°C · Low 5.7°C · 112 mm rain
- Juliaca in DecemberPeru · 280 kmHigh 15.1°C · Low 4.8°C · 140 mm rain
- Oruro in DecemberBolivia · 334 kmHigh 15.9°C · Low 4.6°C · 105 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tacna) is explained once on the Tacna year overview and on the Sources, method and limits page.