January weather forecast
Perth, Australia

January in Perth, Australia brings in the New Year with a blend of warm temperatures and modest humidity. Characterized by a summery weather, the month commences with the city's highest annual temperature, reaching a scorching high of 31.3°C (88.3°F). As the first month of the year, January establishes the precedent for Australia's infamous heat, setting the beaches as ideal hangout spots for locals and tourists alike. The evenings cool down, providing a pleasant respite from the day's heat. Despite the high temperatures, rainfall in January is relatively light, allowing for plenty of outdoor activities.

Temperature

The advent of January signifies a minor shift to an average high-temperature of a tropical 31.3°C (88.3°F), aligning closely with December. With a notable difference from peak temperatures, an average of 18.2°C (64.8°F) marks the nights in January.

Humidity

In Perth, the average relative humidity in January is 39%.

Rainfall

In January, the rain falls for 2.4 days. Throughout January, 15mm (0.59") of precipitation is accumulated. In Perth, during the entire year, the rain falls for 108.4 days and collects up to 725mm (28.54") of precipitation.

Sea temperature

In Perth, the average seawater temperature in January is 21.9°C (71.4°F).
Note: Swimming in 21.9°C (71.4°F) is not a pleasurable activity for the majority of people. Breathing becomes increasingly challenging as water temperature descends from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Perth, Australia, the average length of the day in January is 13h and 58min.
On the first day of the month, sunrise is at 5:13 am and sunset at 7:25 pm. On the last day of January, sunrise is at 5:40 am and sunset at 7:19 pm AWST.

Sunshine

The months with the most sunshine in Perth are January and December, with an average of 11.5h of sunshine.

UV index

The months with the highest UV index are January and December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an extreme health hazard from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 12 during January leads to these advisories:
Employ all critical precautions. Guarding against sun damage is essential. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Ensure the liberal application and reapplication of a broad-spectrum SPF 30+ sunscreen after each outdoor activity or swim, and every two hours. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.