Climate averages 1991–2020
Tacna weather
in May.
A mild, very dry month: the 8th warmest and the 7th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Tacna: daytime highs average 21.6°C and nights cool to about 15.0°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 4.1 mm of rain on fewer than one day, which makes May a very dry month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 17 min on an average May day.
The nearest other city in this atlas is Arica (51 km away). In May its highs average 20.1°C, 1.5°C cooler than Tacna, with 24 mm of rain.
Among the 24 cities listed in Peru, Tacna ranks 18th of 24 for the warmest May highs and 8th of 24 for the driest May (rainfall, lowest first). The mean May high of those 24 cities is 23.7°C; Tacna is 2.1°C cooler than that mean.
From May to June, average highs fall by 2.1°C to 19.5°C, and monthly rainfall rises from 4.1 mm to 4.5 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Arica in MayChile · 51 kmHigh 20.1°C · Low 14.9°C · 24 mm rain
- Puno in MayPeru · 243 kmHigh 14.6°C · Low 0.7°C · 20 mm rain
- Iquique (approximate) in MayChile · 245 kmHigh 23.8°C · Low 15.4°C · 7.6 mm rain
- Alto Hospicio in MayChile · 251 kmHigh 21.2°C · Low 12.0°C · 0.3 mm rain
- Viacha in MayBolivia · 257 kmHigh 14.1°C · Low 0.2°C · 14 mm rain
- La Paz in MayBolivia · 280 kmHigh 14.1°C · Low 2.4°C · 16 mm rain
- Juliaca in MayPeru · 280 kmHigh 14.2°C · Low -0.5°C · 22 mm rain
- Oruro in MayBolivia · 334 kmHigh 14.4°C · Low -0.4°C · 7.3 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.