April 21 is generally a great time to visit Cairns. While there is a slight chance of rain (33%), showers are usually brief. Expect comfortable 27°C weather. Cairns is currently in its most popular travel window, meaning vibrant crowds and premium pricing. Note: April 21 is Easter Monday in Cairns, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Cairns
Currency
AUD
$ Australian dollar
Language
English
Driving
Left side
Safety
High Safety
GPI: 1.565
Cairns Weather Forecast for April 21
"Warm & Sunny. Expect average highs of 27°C. 33% chance of rain."
What to Wear in Cairns in April
Based on historical data for April 21, Cairns typically experiences temperatures between 23°C and 27°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 33% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Cairns
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
27°C
Daytime Peak
Average Low
23°C
Nighttime Low
Feels Like
29.8°C
🔥 Feels warmer
Rain Chance
33%
Avg 3.1mm if it rains
Cloud Cover
59%
Light drizzle
Pressure
1013.3 hPa
Low volatility
Cairns Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 47 min to burn
Type III-IV
🟡 71 min to burn
Type V-VI
🟢 118 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
23.5°C
Humid/Sticky
Heat Index
29.8°C
Feels hotter
😐 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Holiday
Easter Monday
Flight Traffic
High
93/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~74
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Cairns
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:27
☀️ Noon
12:16
🌇 Sunset
18:05
⏱️ Daylight
11h 38m
Wind Speed
18.6 km/h
Gentle breeze
Sunshine
9.1 hrs
Direct Sun (Cloud-free)
Humidity
81%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Cairns
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Cairns
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Cairns on April 21 averages 27°C with a 33% precipitation probability. Wedding/Outdoor Event Score: 89/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Cairns Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
April 28
26.7°C • 27% rain
Score
93
April 26
26.9°C • 29% rain
Score
92
April 27
26.8°C • 28% rain
Score
92
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (April 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Cairns Worth Visiting on April 21?
Planning a trip to Cairns on April 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 27°C with a 33% historical precipitation risk.
🎉 Local Event: The date coincides with Easter Monday, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 74 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Australia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 28°C (tropical bath). Wave conditions are generally fun waves with heights around 1.03m.
📊 Historical Extremes: The hottest April 21 recorded in the last 30 years saw temperatures hit 28.7°C in 2023, while the coldest dropped to 21.5°C in 2022.