Weather in Brasília in December

A good month. December works. It is not the peak, but nothing about it fights you. You should expect rain on 25 days of the month, which is more days wet than dry.

December ranks 10 of 12 — near the bottom of Brasília's year. June is the month that works, and the swing between the two is 48 points, which is a different holiday rather than a slightly better one. Worth keeping in perspective: December is the weakest month of Brasília's year and it is still a perfectly good one. The downside here is small.

Rain on 25 of the month's 31 days, 8 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest December day reached 34.4 °C and the coldest night fell to 13.2 °C, and the wettest single day dropped 50 mm — roughly 23% of the month's rain in one day.

December is one of the reliable ones — rainfall has stayed between 145 mm and 306 mm across all twenty years, a narrow enough band that the 221 mm average is something you can plan against rather than merely quote.

Wind is light at 6.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 80%, high enough to notice on the warm days without dominating them.

How December sits in the year

Temperatures hold steady either side: 27.5 °C in November, 26.2 here, 26 in January. Nothing about the timing within the month matters much.

Daylight in December

Brasília sits close enough to the equator that daylight barely moves all year — 13.1 hours in December, against a range of just 1.9 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 19.3 °C between the year's warmest afternoons and coldest nights. At 1136 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

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.

December in Brasília versus nearby

If Brasília is one option among several, the nearby comparison is worth making. Goiânia is close enough to be a coin toss — 2.2 °C warmer, 1 day more rain. Belo Horizonte is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: December is a compromise. June is 33 points better and is what Brasília is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Brasília

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