January Weather in Mortlake, Australia

Last updated: August 22, 2025

In Mortlake, Australia, the average temperature in January hovers around 19°C (67°F), making it a pleasant time to visit. You can expect temperatures to range from a refreshing 5°C (42°F) to a sizzling 41°C (105°F). During your stay, prepare for about 40 mm (1.6 in) of precipitation over 3 days, with an average humidity of 65% adding to the overall weather experience.

January Temperature in Mortlake

In January in Mortlake, the average temperature is 19°C (67°F). Maximum temperatures can reach 41°C (105°F), while minimums can dip as low as 5°C (42°F). Be prepared for a wide range of temperatures when traveling to Mortlake during this month.

January Weather in Mortlake: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Mortlake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mortlake, January typically has an average temperature of 19°C (67°F), with highs reaching up to 41°C (105°F) and lows dropping to around 5°C (42°F).

Data source: Temperature data for Mortlake generated using information from the Copernicus Climate Change Service.

January Precipitation in Mortlake

In Mortlake in January, the precipitation amount is 40 mm (1.6 in) over a period of 3 days.

January Precipitation Trends in Mortlake

The chart displays monthly precipitation patterns in Mortlake, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Mortlake, January typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 3 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Mortlake

In Mortlake in January, humidity is 65%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace that can make outdoor activities a bit sticky, so travelers may want to plan for more leisurely adventures and stay hydrated to fully enjoy their experience.

January Average Humidity in Mortlake

This chart illustrates the average monthly humidity levels in Mortlake, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Mortlake is approximately 65%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Mortlake

In Mortlake in January, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Mortlake, you can check here.

Maximum UV Index Levels in Mortlake for January

The chart shows the monthly maximum UV Index (UVI) for Mortlake in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Mortlake typically reaches 14, which falls under the extreme exposure category.

Data source: Mortlake January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Mortlake Compares to Other Months

Weather in Mortlake varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Mortlake, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Mortlake, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (67°F)	40 mm (1.6 inches)	65%	extreme
February Weather	18°C (64°F)	32 mm (1.2 inches)	67%	extreme
March Weather	17°C (63°F)	41 mm (1.6 inches)	71%	extreme
April Weather	14°C (58°F)	51 mm (2.0 inches)	75%	high
May Weather	11°C (52°F)	69 mm (2.7 inches)	80%	moderate
June Weather	9°C (48°F)	40 mm (1.6 inches)	80%	moderate
July Weather	9°C (48°F)	58 mm (2.3 inches)	80%	moderate
August Weather	9°C (48°F)	69 mm (2.7 inches)	79%	moderate
September Weather	10°C (51°F)	69 mm (2.7 inches)	76%	high
October Weather	13°C (55°F)	74 mm (2.9 inches)	72%	very high
November Weather	15°C (59°F)	73 mm (2.9 inches)	72%	extreme
December Weather	17°C (62°F)	46 mm (1.8 inches)	69%	extreme