Climate guide for Cairns, Australia

Best Time to Visit
Cairns

How to read the score (0–10)
05810
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About Cairns

June-July offers Cairns’ clearest reef and Daintree stretch with lower humidity. Book outer-reef mornings; save Kuranda or boardwalks for afternoons when trade winds pick up.

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Travel Tips

Timing & weather
Check Cairns's monthly climate scores before locking flights - tropical patterns shift comfort for nature trips across the year.
Getting around
In Cairns, pair a walkable core day with one transit or transfer buffer - crowds and traffic vary by season in Australia.
Tickets & access
Reserve popular museums and day trips from Cairns ahead in peak months; shoulder seasons are more flexible.
Pack for the profile
Bring broken-in footwear, a rain layer, and offline maps for Cairns. Check trail, road, and weather conditions before setting out, because outdoor access can change quickly.

Things to do in Cairns

Cairns, Australia. Live activities and tours from GetYourGuide, matched to this destination.

When to visit Cairns: the short answer

The best time to visit Cairns is August, followed by June, July. Those months combine the most usable temperatures with the fewest lost days to rain: August averages 22°C with 50 mm of rain and about 29 sunny days. The months to avoid unless you have a specific reason are January, March. If budget matters more than perfect weather, April is the strongest of the low-rate months at 4.6/10.

Across the year Cairns swings from 22°C in July to 27°C in January, a 6-degree spread, while rainfall ranges from 41 mm in October to 483 mm in January. That is the whole planning problem in one sentence: Cairns is not equally good year-round, and the difference between the best and worst month here is 4.9 points on a 10-point scale.

Warmest month: January (27°C). Coolest: July (22°C). Driest: October (41 mm). Wettest: January (483 mm).

Cairns month by month

January in Cairns — the hardest end of the year

Hardest · 4.1/10

January averages 27°C (81°F) with humidity around 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

483 mm of rain puts this in monsoon territory — about 24 sunny days across the whole month, and multi-day washouts are normal.

It scores 4.1/10 here, 12th of 12 months, against 9/10 in the destination's best month.

Expect mid-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, August is materially better in Cairns — 4.9 points higher on the same scale.

February in Cairns — the hardest end of the year

Hardest · 4.2/10

February averages 27°C (81°F) with humidity around 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

362 mm of rain puts this in monsoon territory — about 22 sunny days across the whole month, and multi-day washouts are normal.

It scores 4.2/10 here, 10th of 12 months, against 9/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, August is materially better in Cairns — 4.8 points higher on the same scale.

March in Cairns — the hardest end of the year

Hardest · 4.2/10

March averages 27°C (80°F) with humidity around 81%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

319 mm of rain puts this in monsoon territory — about 26 sunny days across the whole month, and multi-day washouts are normal.

It scores 4.2/10 here, 11th of 12 months, against 9/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, August is materially better in Cairns — 4.8 points higher on the same scale.

April in Cairns — the hardest end of the year

Hardest · 4.6/10

April averages 26°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

327 mm of rain puts this in monsoon territory — about 27 sunny days across the whole month, and multi-day washouts are normal.

It scores 4.6/10 here, 8th of 12 months, against 9/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, August is materially better in Cairns — 4.4 points higher on the same scale.

May in Cairns — reliably good (6th best month)

Good · 7/10

May averages 24°C (75°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Rainfall runs 99 mm, so plan one flexible day in three; you still get about 29 sunny days and 11.3 hours of daylight.

It scores 7/10 here, 6th of 12 months, against 9/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.

If your dates are flexible, August is materially better in Cairns — 2 points higher on the same scale.

June in Cairns — the year's strongest window

Best window · 8.6/10

June averages 22°C (72°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Rainfall runs 56 mm, so plan one flexible day in three; you still get about 28 sunny days and 11.1 hours of daylight.

On our climate-comfort scale this is the top-ranked month of the year for Cairns at 8.6/10 — the reference point every other month on this page is measured against.

Expect mid-season pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.

July in Cairns — the year's strongest window

Best window · 8.6/10

July averages 22°C (71°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Rainfall runs 63 mm, so plan one flexible day in three; you still get about 29 sunny days and 11.2 hours of daylight.

On our climate-comfort scale this is the top-ranked month of the year for Cairns at 8.6/10 — the reference point every other month on this page is measured against.

Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack light clothing, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.

August in Cairns — the year's strongest window

Best window · 9/10

August averages 22°C (71°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Rainfall runs 50 mm, so plan one flexible day in three; you still get about 29 sunny days and 11.6 hours of daylight.

On our climate-comfort scale this is the top-ranked month of the year for Cairns at 9/10 — the reference point every other month on this page is measured against.

Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack light clothing, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.

September in Cairns — reliably good (4th best month)

Good · 8.2/10

September averages 23°C (74°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Rainfall runs 59 mm, so plan one flexible day in three; you still get about 29 sunny days and 12 hours of daylight.

It scores 8.2/10 here, 4th of 12 months, against 9/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.

October in Cairns — reliably good (5th best month)

Good · 7.9/10

October averages 25°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Expect 41 mm of rain — occasional showers rather than washed-out days — alongside about 31 sunny days and 12.5 daylight hours.

It scores 7.9/10 here, 5th of 12 months, against 9/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection, footwear you can get muddy.

November in Cairns — workable with trade-offs

Trade-offs · 6.7/10

November averages 27°C (80°F) with humidity around 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

Rainfall runs 72 mm, so plan one flexible day in three; you still get about 30 sunny days and 12.9 hours of daylight.

It scores 6.7/10 here, 7th of 12 months, against 9/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer, footwear you can get muddy.

If your dates are flexible, August is materially better in Cairns — 2.3 points higher on the same scale.

December in Cairns — the hardest end of the year

Hardest · 4.3/10

December averages 27°C (81°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

395 mm of rain puts this in monsoon territory — about 26 sunny days across the whole month, and multi-day washouts are normal.

It scores 4.3/10 here, 9th of 12 months, against 9/10 in the destination's best month.

Expect mid-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, August is materially better in Cairns — 4.7 points higher on the same scale.

Frequently asked

When is the best time to visit Cairns, Australia?
In Ideal Weather mode, the best months to visit Cairns are August, June, July, September. August is the single peak month with an Ideal Weather score of 9.0/10 based on temperature, rainfall, humidity, daylight and historical sunny days.
What is the weather like in Cairns year-round?
Cairns has a climate profile suited to nature and wildlife travel. Average monthly temperatures range from 22°C in July to 27°C in January, with Ideal Weather scores between 4.1 and 9.0 out of 10.
Which months should I avoid in Cairns?
The lowest Ideal Weather-scoring months in Cairns are January (4.1/10), February (4.2/10), March (4.2/10). These months typically combine less comfortable temperatures, higher rainfall or fewer sunny days.
When is the rainy season in Cairns?
January is the wettest month in Cairns, averaging about 483 mm of rainfall. October is the driest, at roughly 41 mm.
Which is the sunniest month in Cairns?
October sees the most sun in Cairns, with about 31 sunny days on average - ideal for outdoor plans.
Is Cairns a good destination for nature and wildlife travel?
Cairns is well suited to nature and wildlife travel. Its highest Ideal Weather window (August, June, July, September) aligns with the conditions travelers usually look for in this style of trip.
How is the bestime.to score for Cairns calculated?
Each month receives an Ideal Weather score from 0-10 using ERA5 climate normals for Cairns: temperature comfort, precipitation, humidity, daylight hours, and historical sunny days - weighted for nature and wildlife travel.

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