Biblioteca Regional de AntofagastaReport this photo · linked, not stored
Antofagasta climate by month
What the weather is like
Antofagasta has a cold desert climate (Köppen BWk): very little rain and intense sun.
The warmest month is February, when afternoons average 23° and nights 17°. August is the coolest month, with highs of 17° and lows of 11°. The difference between the warmest and the coolest month is about 6°, a small seasonal swing typical of places tempered by the sea.
About 36 mm of precipitation falls in an average year. February is the wettest month (2 mm, 1 wet days) and September the driest (3 mm, 0 wet days). Cloud cover ranges from 17% in September to 26% in May.
The sea reaches about 20° in January. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Santiago, the capital, Antofagasta is 5.8° cooler on a February afternoon and receives less precipitation over the year.
Year in figures
- Hottest afternoons
- 23° · February
- Coldest nights
- 11° · August
- Wettest month
- February
- Driest month
- September
- Clearest skies
- September · 17% cloud
- Warmest sea
- 20° · January
- Longest day
- 13 h 35 min
- Shortest day
- 10 h 41 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 23° | 23° | 22° | 20° | 19° | 18° | 17° | 17° | 17° | 18° | 19° | 21° |
| Average low | 17° | 17° | 17° | 15° | 13° | 12° | 11° | 11° | 11° | 12° | 13° | 15° |
| Precipitation | 2 mm | 2 mm | 2 mm | 3 mm | 4 mm | 5 mm | 5 mm | 3 mm | 3 mm | 3 mm | 2 mm | 2 mm |
| Wet days (≥1 mm) | 0.2 | 0.6 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0 | 0 | 0.1 | 0.2 |
| Cloud cover | 22% | 19% | 18% | 24% | 26% | 25% | 21% | 21% | 17% | 19% | 20% | 20% |
| Sea temperature | 20° | 20° | 19° | 18° | 17° | 16° | 15° | 15° | 15° | 16° | 18° | 19° |
| Daylight | 13h 26 | 12h 53 | 12h 15 | 11h 33 | 10h 59 | 10h 41 | 10h 48 | 11h 17 | 11h 57 | 12h 37 | 13h 15 | 13h 35 |
| Month score | 100 | 99 | 100 | 100 | 100 | 98 | 96 | 94 | 97 | 99 | 100 | 100 |