January Weather in Macarthur, Australia

Last updated: August 22, 2025

In Macarthur, Australia, the average temperature in January is a pleasant 19°C (66°F). However, temperatures can vary significantly, with minimums dropping to 6°C (44°F) and maximums soaring to a sizzling 41°C (107°F). Expect precipitation of about 30 mm (1.2 in) over 4 days, accompanied by an average humidity level of 76%.

January Temperature in Macarthur

In January in Macarthur, the average temperature is 19°C (66°F), with maximums reaching 41°C (107°F) and minimums dipping as low as 6°C (44°F). This varied climate makes Macarthur an ideal destination for travelers looking to experience diverse weather conditions.

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

The chart illustrates January temperature patterns in Macarthur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Macarthur, January typically has an average temperature of 19°C (66°F), with highs reaching up to 41°C (107°F) and lows dropping to around 6°C (44°F).

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

January Precipitation in Macarthur

In Macarthur in January, the precipitation amount is 30 mm (1.2 in) over the course of 4 days.

January Precipitation Trends in Macarthur

The chart displays monthly precipitation patterns in Macarthur, 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 Macarthur, January typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 4 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Macarthur

In Macarthur in January, humidity is 76%. With an average temperature of 19°C (66°F), this humidity feels like a warm, thick blanket wrapping around you, making travel mildly uncomfortable and encouraging frequent breaks in shaded or air-conditioned areas.

January Average Humidity in Macarthur

This chart illustrates the average monthly humidity levels in Macarthur, 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 Macarthur is approximately 76%, 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 Macarthur

In Macarthur 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 Macarthur, you can check here.

Maximum UV Index Levels in Macarthur for January

The chart shows the monthly maximum UV Index (UVI) for Macarthur 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 Macarthur typically reaches 14, which falls under the extreme exposure category.

Data source: Macarthur 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 Macarthur Compares to Other Months

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

This table compares monthly weather conditions in Macarthur, 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 (66°F)	30 mm (1.2 inches)	76%	extreme
February Weather	18°C (64°F)	28 mm (1.1 inches)	75%	extreme
March Weather	17°C (63°F)	34 mm (1.3 inches)	76%	extreme
April Weather	14°C (58°F)	48 mm (1.9 inches)	76%	high
May Weather	11°C (53°F)	76 mm (3.0 inches)	79%	moderate
June Weather	9°C (49°F)	57 mm (2.2 inches)	78%	moderate
July Weather	9°C (48°F)	76 mm (3.0 inches)	78%	moderate
August Weather	9°C (49°F)	85 mm (3.4 inches)	77%	moderate
September Weather	11°C (52°F)	72 mm (2.8 inches)	76%	high
October Weather	13°C (55°F)	76 mm (3.0 inches)	76%	very high
November Weather	15°C (59°F)	67 mm (2.6 inches)	76%	extreme
December Weather	16°C (62°F)	43 mm (1.7 inches)	76%	extreme