Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In September, Cairns experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 24°C (75.2°F) in August to a still moderately hot 25.8°C (78.4°F). Throughout September, Cairns witnesses a nighttime temperature average of 19.5°C (67.1°F).Humidity
September and October, with an average relative humidity of 74%, are the least humid months in Cairns.Rainfall
The month with the least rainfall in Cairns is September, when the rain falls for 7.2 days and typically collects 9mm (0.35") of precipitation.Sea temperature
In Cairns, the average seawater temperature in September is 24.8°C (76.6°F).Note: Individual preferences to cold, influenced by conditions such as sunshine, wind, and surrounding temperature, play a part in the comfort of swimming in 24.8°C (76.6°F) waters. (As an aside, Olympic swimming standards dictate water temperatures from 25°C (77°F) to 28°C (82.4°F).)
Daylight
In Cairns, the average length of the day in September is 12h and 0min.On the first day of September in Cairns, Australia, sunrise is at 6:23 am and sunset at 6:10 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 6:14 pm AEST.
Sunshine
The average sunshine in September in Cairns, Australia, is 9.1h.UV index
In Cairns, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 6 in September leads to these recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.
Frequently asked questions
What is the temperature in September in Cairns?
What is the least humid month in Cairns?
What is the average humidity in September in Cairns?
What is the driest month in Cairns?
How much does it rain in Cairns in September?
What is the water temperature in September in Cairns?
What is the average length of the day in September in Cairns?
When are sunrise and sunset in September in Cairns?
How long on average sun shines in September in Cairns?
How high is the UV index in September in Cairns?
Average temperature in September
Cairns, Australia
- Average high temperature in September: 25.8°C
The warmest month (with the highest average high temperature) is February (29.4°C).
The month with the lowest average high temperature is July (23.2°C).
- Average low temperature in September: 19.5°C
The months with the highest average low temperature are January and February (24.3°C).
The coldest month (with the lowest average low temperature) is August (18°C).
Average pressure in September
Cairns, Australia
- Average pressure in September: 1015.8mbar
The month with the highest atmospheric pressure is July (1016.8mbar).
The month with the lowest atmospheric pressure is January (1007.6mbar).
Average wind speed in September
Cairns, Australia
- Average wind speed in September: 13.6km/h
The windiest month (with the highest average wind speed) is May (17.2km/h).
The calmest month (with the lowest average wind speed) is February (11.2km/h).
Average humidity in September
Cairns, Australia
- Average humidity in September: 74%
The month with the highest relative humidity is March (81%).
The months with the lowest relative humidity are September and October (74%).
Average rainfall in September
Cairns, Australia
- Average rainfall in September: 9mm
The wettest month (with the highest rainfall) is January (162mm).
The driest month (with the least rainfall) is September (9mm).
Average rainfall days in September
Cairns, Australia
- Average rainfall days in September: 7.2 days
The month with the highest number of rainy days is January (22.4 days).
The month with the least rainy days is September (7.2 days).
Average sea temperature in September
Cairns, Australia
- Average sea temperature in September: 24.8°C
The best month for swimming (with the highest average sea temperature) is January (29.5°C).
The coldest month (with the lowest average sea temperature) is July (23.8°C).
Average daylight in September /
Average sunshine in September
Cairns, Australia
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 6min).
The month with the shortest days is June (Average daylight: 11h and 6min).
- Average sunshine in September: 9h and 1min
The months with the most sunshine are October and November (Average sunshine: 10h and 48min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).
Average sunshine days in September
Cairns, Australia
- Average sunshine days in September: 17 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is January (6.3 days).
Average UV index in September
Cairns, Australia
- Average UV index in September: 6
The months with the highest UV index are January, February and November (UV index 7).
The month with the lowest UV index is July (UV index 5).
Average cloud cover in September
Cairns, Australia
- Average cloud cover in September: 28
The months with the most cloud cover are January and March (Cloud cover 45).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in September
Cairns, Australia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Cairns, Australia
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