Cairns Weather in May
Cairns in May sees high temperatures, with highs around 25°C (77°F) and overnight lows of 21°C (70°F). Overall perfect conditions make it one of the better months to visit.
Rainfall in Cairns in May
Past climate data indicates that roughly 8 days will see rain, totalling around 56 mm (2.2 in) for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Cairns in May
May is a good time to be in Cairns. Days are perfect, reaching 25°C (77°F), with nights around 21°C (70°F). Overall, the month follows a fairly predictable daily temperature pattern. At 21°C (70°F) overnight, nights are warm enough to sit outside comfortably in light clothing.
Sunshine in Cairns in May
There are approximately 210 hours of sunshine this month, resulting in mostly clear days.
Average water temperature in May
At 24°C (75°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August, September, October and November typically offer the best weather for Cairns.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Australia, check out our Cairns's climate page.
Cairns Temperature in May
Min Temperature
21°C (70°F)
Max Temperature
25°C (77°F)
Water Temperature
24°C (75°F)
Chance of Rain
28%
Precipitation
56 mm (2.2 in)
Rainy days
8 days
Humidity
71%
Sunshine
210 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cairns typically stay consistent throughout May, with daily highs averaging around 25°C (77°F). Nights are warm, with lows typically ranging from 20°C (68°F) to 22°C (72°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Cairns in May
Browse day-by-day weather records for Cairns spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cairns historical weather extremes in May
Based on weather observations in Cairns between 1976 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 1, 2007, with a maximum of 31°C (88°F).
- On May 26, 1990, Cairns saw its coldest May day with temperatures maxing out at 18°C (64°F).
- The lowest overnight temperature recorded in May was 11°C (52°F) (May 22, 2001).
Best Places in Australia in May
Find out more about the weather in Australia and which places have the best travel conditions in this month. See all of Australia in May →
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What to Wear in Cairns in May
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. Expect water temperatures of around 24°C (75°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Cairns in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Australia, check out our Cairns's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Cairns climate overview or explore weather in Australia.
