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Cairns in December: Weather, Average temperature and Climate

Discover the weather for Cairns in December and if it’s a good time to travel (based on historical data).
Check flight prices to Cairns on Avionero:
December

Weather in Cairns in December 2024

OK Weather
Warm
🌧️
Rainy
🌊
Very warm water
December could be a good time to visit Cairns, as the weather is generally fine. The average high temperature is around +84°F, and there are typically 3 sunny days in December. However, expect about 20 rainy days, and total monthly rainfall of approximately 170 mm. The weather is changeable so pack for every eventuality. Search flights in one click on Avionero.
Good to know:
  • December is usually the hottest month of the year in Cairns;

Average weather

☀️
+84°F
Avg. max. temperature
+66°F
Min.
+100°F
Max.
170 mm
Total precipitation
77%
Avg. humidity
2 m/s
Avg. wind
3 ☀️
Sunny Days
5 ⛅️
Cloudy
20 🌦
Rainy
Our opinion: Cairns has OK weather in December.

Average temperature in Cairns in December

Here are the expected maximum, average and minimum temperatures in Cairns for December based on the historical data.
Last Year
Historical Data

The expected average maximum temperature in December is +82°F with a maximum of +86°F and a minimum of +73°F.

The average maximum temperature goes up 14% by the end of the month, compared with the beginning of the month, from +82°F to +84°F.

Is Cairns warm or cold in December?

Cairns is typically warm in December.

Maximum temperatures go up compared to the previous month from +82°F to +84°F. The minimum temperature also goes up from +75°F to +77°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

December is the hottest month in Cairns, here is the comparison with other months:

Water temperature in Cairns in December

Water in Cairns in December is Very warm. It varies from +82°F to +86°F, with an average of +84°F. This is almost similar to the air temperature, which averages +84°F.

The water temperature in December is one of the warmest of the entire year:

The warmest water temperatures in Cairns are reached in February, when the average sea temperature rises to +85°F. The coldest water temperatures are in July, with an average of +75°F.

Can you swim in Cairns in December?

You can definitely swim in Cairns in December, the water is very warm (+84°F in average), and might even be unpleasant for ones who like it more fresh.
🦭
Cold
Below +61°F
🏄‍♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
Don't forget sunscreen and a hat, it's going to be hot!

Climate in Cairns in December

Cairns weather looks like this, on average, in December and the surrounding months.
NovemberDecemberJanuary
Avg. temperature
+82°F+84°F+84°F
Min. temperature
+63°F+66°F+70°F
Max. temperature
+106°F+100°F+104°F
Rainfall
68 mm170 mm290 mm
Wind
3 m/s2 m/s2 m/s
Avg. water temperature
+82°F+84°F+85°F
Humidity
75%77%80%
Air pressure
1010 HPa1008 HPa1007 HPa
Sunny days
531
Cloudy days
853
Rainy days
162022
Snowy days
000

December weather is still as ok as in November. It’s getting warmer as December arrives. The average maximum temperature goes up from +82°F to +84°F during the day. Prepare for more rain. Average rainfall goes from 68 mm to 170 mm. Humidity rises from 75% to 77%. Winds are calmer in comparison to November, going down from 3 m/s to 2 m/s on average. The days becoming less sunny, going from 5 sunny days in November to 3 in December.

January brings much the same weather, it remains ok.

Wind

Wind speed in Cairns in December based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 10 m/s which is a medium breeze. You can feel it, especially getting out of the water.

The average wind speed in Cairns is gradually increasing during December, going from 2 m/s to 2 m/s over the course of the month.

Rain

Amount of rainfall in mm during December in Cairns based on historical data.
Last Year
Historical Data
Total precipitation in December is about 856 mm, with a 74% chance of rain on a typical day. The maximum amount of rainfall per day is around 241 mm, which is considered heavy rain. December is a pretty wet month with over 23 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how December is compared with other months in the amount of precipitation, total mm:
Cairns wettest month is January, where a typical day has a 71% chance of precipitation and 290 mm of rainfall per day. September, on the other hand, is the driest month with a mere 33% chance of precipitation and 20 mm of rainfall per day.

How was the weather last December in Cairns?

This is the weather in Cairns in December 2023:
1 December
☁️
+83°F
2 December
☁️
+83°F
3 December
☁️
+83°F
4 December
☁️
+83°F
5 December
☁️
+82°F
6 December
☁️
+81°F
7 December
☁️
+81°F
8 December
☁️
+81°F
9 December
☁️
+82°F
10 December
☀️
+82°F
11 December
☁️
+84°F
12 December
🌧️
+82°F
13 December
🌧️
+79°F
14 December
🌧️
+79°F
15 December
🌧️
+80°F
16 December
🌧️
+79°F
17 December
🌧️
+78°F
18 December
☁️
+80°F
19 December
☁️
+80°F
20 December
☁️
+80°F
21 December
☁️
+81°F
22 December
☁️
+82°F
23 December
☁️
+83°F
24 December
☁️
+84°F
25 December
🌧️
+84°F
26 December
🌧️
+83°F
27 December
☁️
+83°F
28 December
☁️
+84°F
29 December
☁️
+84°F
30 December
☁️
+86°F
31 December
☁️
+85°F
In December 2023 Cairns had 1 sunny days, 22 cloudy days, and 8 rainy days. The average maximum temperature was +82°F, with an absolute maximum of +86°F and a minimum of +79°F. The average humidity was 85%, with a maximum of 98% and a minimum of 57%. The average wind speed was 3 m/s, with a maximum of 14 m/s and a minimum of 0 m/s.
Are you planning a trip in December?

Climate Change Over the Years

This is how Cairns climate has changed over the last 43 years.

The climate in Cairns in December has not changed that much over the last 43 years.

The average temperature was the lowest in 1982 (+76°F) and the highest in 2013 (+86°F). The driest year was 2002 with only 513 mm of rainfall, and the wettest year was 2023 with 3123 mm.

FAQ

Frequently asked questions about the weather in Cairns in December:

Is December a good time to visit Cairns?

It’s always a good time to visit Cairns, but the weather is changeable in December, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Cairns in December?

December is warm in Cairns. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Can you swim in Cairns in December?

Yes, you can swim in Cairns in December, the water is very warm, with temperature averaging at +84°F, but it's important to manage hydration and sun exposure.

Is Cairns rainy in December?

Cairns is often rainy in December. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Cairns in December?

Usually, it’s not very sunny in Cairns in December, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in Australia

Check out the weather for other cities in Australia.

Monthly weather in Cairns

Source of the data

For this page, we’ve looked at the typical weather in Cairns, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.