Cairns
Australia
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Cairns, Australia

January, like December, in Cairns, Australia, is another warm summer month, with temperature in the range of an average high of 29.3°C (84.7°F) and an average low of 24.3°C (75.7°F).

Temperature

In January, the average high-temperature is relatively the same as in December - a still warm 29.3°C (84.7°F). In January, the average low-temperature is 24.3°C (75.7°F).

Heat index

In January, the average heat index is estimated at a very hot 35.6°C (96.1°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, differences in body mass, height, and shape, pregnancy). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In January, the average relative humidity is 80%.

Rainfall

The month with the most rainfall is January when the rain falls for 22.4 days and typically aggregates up to 162mm (6.38") of precipitation.

Sea temperature

January is the month with the warmest seawater in Cairns, with an average sea temperature of 29.5°C (85.1°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day is 13h.

Sunshine

In Cairns, the average sunshine is 8.9h.

UV index

Months with the highest UV index are January, February and November, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in January in Cairns?

In Cairns, in January, the average high-temperature is 29.3°C (84.7°F), and the average low-temperature is 24.3°C (75.7°F). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that combines relative humidity and air temperature, in January is evaluated at 35.6°C (96.1°F).

What is the average humidity in January in Cairns?

The average relative humidity in January in Cairns, Australia, is 80%.

How much does it rain in Cairns in January?

In Cairns, in January, during 22.4 rainfall days, 162mm (6.38") of precipitation is typically accumulated.

What is the rainiest month in Cairns?

January is the month with the most rainfall in Cairns, Australia. Rain falls for 22.4 days and accumulates 162mm (6.38") of precipitation.

What is the month with the warmest sea water in Cairns?

The month with the warmest seawater is January, with an average sea temperature of 29.5°C (85.1°F).

How warm is the water in January in Cairns?

In Cairns, the average seawater temperature in January is 29.5°C (85.1°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in January in Cairns?

In Cairns, Australia, the average length of the day in January is 13h.

How many hours of sunshine does Cairns have in January?

In January, the average sunshine is 8.9h.

What is the month with the highest UV index in Cairns?

Months with the highest UV index in Cairns, Australia, are January, February and November, with an average maximum UV index of 7.

What is the UV index reading in January in Cairns?

In January, the average daily maximum UV index in Cairns, Australia, is 7. A UV Index reading of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in January - Cairns, Australia
  • Average high temperature in January: 29.3°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 January: 24.3°C

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 humidity in January - Cairns, Australia
  • Average humidity in January: 80%

The month with the highest relative humidity is March (81%).
Months with the lowest relative humidity are September and October (74%).

Average rainfall in January - Cairns, Australia
  • Average rainfall in January: 162mm

The wettest month (with the highest rainfall) is January (162mm).
The driest month (with the lowest rainfall) is September (9mm).

Average rainfall days in January - Cairns, Australia
  • Average rainfall days in January: 22.4 days

The month with the highest number of rainy days is January (22.4 days).
The month with the lowest number of rainy days is September (7.2 days).

Average sea temperature in January - Cairns, Australia
  • Average sea temperature in January: 29.5°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 January / Average sunshine in January - Cairns, Australia
  • Average daylight in January: 13h

The month with the longest days is December (Average daylight: 13.1h).
The month with shortest days is June (Average daylight: 11.1h).

  • Average sunshine in January: 8.9h

Months with most sunshine are October and November (Average sunshine: 10.8h).
The month with least sunshine is June (Average sunshine: 5.9h).

Average UV index in January - Cairns, Australia
  • Average UV index in January: 7

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).