Weather in Airlie Beach in December

Shoulder season. December sits in between. You will get good days and you will lose some. Highs average 30.4 °C, lows 24.7 °C, and rain falls on 11 days — nothing in the month is working against you.

December ranks 10 of 12 — near the bottom of Airlie Beach's year. August is the month that works, and the swing between the two is 43 points, which is a different holiday rather than a slightly better one.

Rain on 11 days, 4 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 30.4 °C days and 24.7 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 18 days top 30 °C — hot spells arrive, but they break; the day barely swings — 5.7 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest December day reached 37.3 °C and the coldest night fell to 21.6 °C, and the wettest single day dropped 58 mm — roughly 50% of the month's rain in one day.

This is the volatile part. December rainfall has ranged from 12 mm to 477 mm across the twenty years measured — a 465 mm spread around an average of 115 mm. The average is real but almost no individual December looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 9.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 73%.

How December sits in the year

Temperatures hold steady either side: 29.3 °C in November, 30.4 here, 29.9 in January. Nothing about the timing within the month matters much. Rain is the thing that moves: January brings 6 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in December

December is at or near the longest days of Airlie Beach's year: 13.3 hours of daylight, holding steady all month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 27.8 °C in December — warm enough that the water offers no relief from the heat. The sea peaks at 28.6 °C in February and bottoms out at 23.1 °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.

December in Airlie Beach versus nearby

If Airlie Beach is one option among several, the nearby comparison is worth making. Mackay is close enough to be a coin toss — 2.4 °C cooler, 2 days more rain. Townsville is the weaker option in December — 3.1 °C warmer, 1 day less rain.

So: December is a compromise. August is 33 points better and is what Airlie Beach 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 Airlie Beach

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