Weather in Antofagasta in May

Prime time. May is about as good as Antofagasta gets. Highs average 18.1 °C, lows 14.4 °C, and rain falls on 0 days — nothing in the month is working against you.

Antofagasta barely has seasons. May scores 94 out of 100 against a best of 100 in January — a gap small enough that the month you choose matters far less here than the week you choose.

Rain is not a factor worth planning around this month. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average May reaches 30 °C; the day barely swings — 3.7 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest May day reached 21.5 °C and the coldest night fell to 12 °C.

May is dependably dry, and that reliability is the point: across the twenty years measured, the wettest May on record still only managed 1 mm, and the driest managed 0 mm. There is no meaningful variability to plan around, which makes this one of the few months anywhere that you can build a fixed outdoor itinerary against without a fallback. The wettest single day in twenty years of Mays brought 1 mm. Rain simply is not the variable that decides this trip — heat, crowds and cost are.

Wind is light at 9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 82%, high enough to notice on the warm days without dominating them.

How May sits in the year

Temperatures hold steady either side: 19.8 °C in April, 18.1 here, 16.9 in June. Nothing about the timing within the month matters much.

Daylight in May

May sits at the dark end of Antofagasta's year — 11 hours of daylight against 13.6 at midsummer, losing 0.5 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

Sea temperature

The sea sits at about 18.3 °C in May — swimmable, but it takes a moment to commit. The sea peaks at 22.4 °C in February and bottoms out at 15.3 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Shoulder. The value months — prices ease off and you get the place closer to itself.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

May in Antofagasta versus nearby

If Antofagasta is one option among several, the nearby comparison is worth making. Salta is close enough to be a coin toss — 7.8 °C warmer, 3 days more rain. Arica is the weaker option in May — 15.2 °C warmer, the same number of rain days.

So: May is effectively as good as it gets here — 6 points behind January, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Antofagasta

See all twelve months in Antofagasta, or where else to go in May.