Weather by Month - Cairns

Cairns enjoys relatively stable temperatures year-round, with averages ranging from 23°C / 73°F to 26°C / 79°F. Rainfall averages 117 mm / 4.6 in per month, with January typically the wettest. December offers the longest days with around 13 hours of daylight.

Temperature Comparison

Month Low Temperature High Temperature Category
January warm
February warm
March warm
April warm
May warm
June warm
July warm
August warm
September warm
October warm
November warm
December warm

Rain & Sunshine Patterns

Driest Months

#1 September
Best for: outdoor activities & sightseeing
#2 August
Best for: outdoor activities & sightseeing
#3 June
Best for: outdoor activities & sightseeing

Wettest Months

#1 January
Expect: possible showers, pack waterproofs
#2 February
Expect: possible showers, pack waterproofs
#3 March
Expect: possible showers, pack waterproofs

UV & Sun Protection Calendar

High UV Alert:
January, February, March, April, May, June, July, August, September, October, November, December require serious sun protection.
Jan
10
VERY-HIGH
Feb
10
VERY-HIGH
Mar
10
VERY-HIGH
Apr
9
VERY-HIGH
May
7
HIGH
Jun
6
HIGH
Jul
7
HIGH
Aug
8
HIGH
Sep
9
VERY-HIGH
Oct
9
VERY-HIGH
Nov
10
VERY-HIGH
Dec
10
VERY-HIGH
Extreme (11+)
Avoid sun during midday, use SPF 50+
Very High (8-10)
Essential sun protection required
High (6-7)
Use SPF 30+, wear hat & sunglasses
Moderate (3-5)
Sun protection recommended
Low-Moderate (1-2)
Minimal protection needed
Low (0)
No protection required

Daylight Hours

Daylight varies from 11.1 hours in June (winter) to 13.1 hours in December (summer), which is a difference of 2 hours.

Shortest Days

June
11.1h
Average Sunrise:06:42
Average Sunset:17:50
Plan daytime activities for midday when light is best. Early sunsets mean evening plans should account for darkness.

Longest Days

December
13.1h
Average Sunrise:05:38
Average Sunset:18:45
Extended daylight perfect for evening activities and late dining. You can fit more sightseeing into each day.

Wind & Humidity Overview

Wind Conditions

Average wind speed
Windiest months:
May (14 km/h) April (14 km/h) June (14 km/h)
Packing tip: Conditions are generally calm, but a light layer is always handy.

Humidity Levels

Average humidity
79%
Most humid:
February (83%)
Least humid:
September (75%)
Packing tip: Choose breathable, natural fabrics like cotton or linen for comfort in humid conditions.

Seasonal Overview

Southern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:

Summer

January, February, December
Avg High 29°C
Avg Low 25°C
Avg Rain 243 mm
Warm and pleasant; perfect for travel

Autumn

March, April, May
Avg High 26°C
Avg Low 23°C
Avg Rain 149 mm
Wet season begins; bring rain gear

Winter

June, July, August
Avg High 23°C
Avg Low 20°C
Avg Rain 34 mm
Mild winter; light layers recommended

Spring

September, October, November
Avg High 26°C
Avg Low 22°C
Avg Rain 42 mm
Pleasant warming; ideal for outdoor activities

Monthly Details

Click any month for detailed weather information and packing advice.

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Frequently Asked Questions

What is the best month to visit Cairns?

The best months to visit Cairns depend on your preferences. For warm weather, February is typically the warmest month. For dry conditions, September, August, June tend to have the least rainfall. Consider your priorities—whether you prefer warmer temperatures, drier weather, or longer daylight hours.

When is Cairns warmest?

February is typically the warmest month in Cairns, with average high temperatures reaching around 29°C (84°F). This is peak summer weather, ideal for outdoor activities and sightseeing.

When is Cairns coldest?

July is usually the coldest month, with average low temperatures dropping to around 19°C (66°F). Pack warm layers if visiting during this time, especially for evening activities.

When does Cairns get the most rain?

January typically sees the most rainfall in Cairns, averaging around 277mm (10.9 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.

What is the driest month in Cairns?

September is typically the driest month, with average rainfall of just 23mm (0.9 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.

How much does the temperature vary in Cairns throughout the year?

Temperatures in Cairns range from average lows of 23°C (73°F) to highs of 26°C (79°F). This variation means you'll want to pack differently depending on when you visit—layers are key for adapting to the seasonal changes.

Do I need sun protection when visiting Cairns?

Yes, sun protection is important in Cairns. UV levels can reach 10 during peak months, which is considered very high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.

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