January Weather in Casterton, Australia

Last updated: August 22, 2025

In January, the average temperature in Casterton, Australia hovers around 20°C (68°F). However, be prepared for a wide temperature range, with minimums dipping to 5°C (42°F) and maximums soaring to 42°C (108°F). During this month, expect an average precipitation of 26 mm (1.0 in) over just 2 days, and enjoy a comfortable average humidity of 45%.

January Temperature in Casterton

In January in Casterton, the average temperature is 20°C (68°F). Maximums can reach 42°C (108°F), while minimums can be as low as 5°C (42°F). Be prepared for a wide range of temperatures during your travels, making it essential to pack versatile clothing options.

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

The chart illustrates January temperature patterns in Casterton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casterton, January typically has an average temperature of 20°C (68°F), with highs reaching up to 42°C (108°F) and lows dropping to around 5°C (42°F).

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

January Precipitation in Casterton

In Casterton in January, the precipitation amount is 26 mm (1.0 in) over the course of 2 days.

January Precipitation Trends in Casterton

The chart displays monthly precipitation patterns in Casterton, 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 Casterton, January typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 2 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 Casterton

In Casterton in January humidity is 45%. With an average temperature of 20°C (68°F), this humidity feels like a refreshing embrace, making it comfortable for traveling and exploring the sights without feeling overly sticky or weighed down.

January Average Humidity in Casterton

This chart illustrates the average monthly humidity levels in Casterton, 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 Casterton is approximately 45%, 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 Casterton

In Casterton 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 Casterton, you can check here.

Maximum UV Index Levels in Casterton for January

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

Data source: Casterton 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 Casterton Compares to Other Months

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

This table compares monthly weather conditions in Casterton, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (68°F)	26 mm (1.0 inches)	45%	extreme
February Weather	18°C (65°F)	23 mm (0.9 inches)	49%	extreme
March Weather	18°C (64°F)	23 mm (0.9 inches)	57%	extreme
April Weather	14°C (58°F)	37 mm (1.5 inches)	67%	high
May Weather	11°C (52°F)	67 mm (2.7 inches)	75%	moderate
June Weather	9°C (48°F)	44 mm (1.7 inches)	79%	moderate
July Weather	8°C (47°F)	73 mm (2.9 inches)	80%	moderate
August Weather	9°C (48°F)	73 mm (2.9 inches)	75%	moderate
September Weather	10°C (51°F)	66 mm (2.6 inches)	69%	high
October Weather	12°C (55°F)	63 mm (2.5 inches)	59%	very high
November Weather	15°C (60°F)	57 mm (2.3 inches)	56%	extreme
December Weather	17°C (63°F)	35 mm (1.4 inches)	50%	extreme