Weather in Trujillo in December

A hard month. December is a hard month in Trujillo, and worth planning around. Daytime highs average 35.8 °C and the afternoon is not negotiable — outdoor plans move to early morning or evening.

December ranks 5 of 12 in Trujillo: past the worst of the year but short of February, which is the month to book if the dates are open.

Rain falls on only 6 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for heat management rather than style: shade, water, and a schedule that gives up on the middle of the day.

What the averages hide

Averages flatten a month, and this one hides a few things: 22 days of the month clear 35 °C — that is not a heatwave, it is the month. Across the twenty years measured, the hottest December day reached 40.8 °C and the coldest night fell to 21.5 °C.

December is moderately variable: 1 mm in the driest year against 39 mm in the wettest, around an average of 18 mm. Roughly two Decembers in three land near that average, and the third does something else entirely.

Wind is light at 8.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 68%.

How December sits in the year

Temperatures hold steady either side: 35.8 °C in November, 35.8 here, 36.2 in January. Nothing about the timing within the month matters much.

Daylight in December

Trujillo sits close enough to the equator that daylight barely moves all year — 12.6 hours in December, against a range of just 0.9 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 20.5 °C in December — swimmable, but it takes a moment to commit. The sea peaks at 23.8 °C in February and bottoms out at 17.6 °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

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, March is the trade worth considering — 7 points weaker on weather, and materially quieter.

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

December in Trujillo versus nearby

If Trujillo is one option among several, the nearby comparison is worth making. Piura is close enough to be a coin toss — within a degree on temperature, 4 days less rain. Lima is a better bet in December — 6.6 °C cooler, 6 days less rain.

So: December is effectively as good as it gets here — 0 points behind February, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Trujillo

See all twelve months in Trujillo, or where else to go in December.