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August Weather in Casterton, Australia

Last updated: August 22, 2025

In August, the average temperature in Casterton, Australia hovers around 9°C (48°F). Expect a chill in the air, with minimums dipping as low as -1°C (30°F) and reaching highs up to 20°C (69°F). Prepare for a wet month too, with an average precipitation of 73 mm (2.9 in) spread over 14 days. Humidity levels tend to be quite high at 75%, making the air feel even cooler.

August Temperature in Casterton

In August in Casterton, the average temperature is 9°C (48°F). Maximum temperatures can reach up to 20°C (69°F), while minimums can drop as low as -1°C (30°F). This makes Casterton a destination where travelers should be prepared for both mild and chilly weather conditions.

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

The chart illustrates August 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, August typically has an average temperature of 9°C (48°F), with highs reaching up to 20°C (69°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec686564585248474851545963
Data source: Temperature data for Casterton generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Casterton

In Casterton in August, the total precipitation amount is 73 mm (2.9 in) over the course of 14 days.

August Precipitation Trends in Casterton

The chart displays monthly precipitation patterns in Casterton, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Casterton, August typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec262323376844737366635735
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Casterton

In Casterton in August humidity is 75%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill, making it essential to dress in layers for comfort while traveling.

August Average Humidity in Casterton

This chart illustrates the average monthly humidity levels in Casterton, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Casterton is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec45%49%57%67%75%79%80%75%69%59%56%50%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Casterton

In Casterton in August, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Casterton.

Maximum UV Index Levels in Casterton for August

The chart shows the monthly maximum UV Index (UVI) for Casterton in August, 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 August, the maximum UV index in Casterton typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec14121174335791214
Data source: Casterton August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (68°F)26 mm (1.0 inches)45%extreme
February Weather18°C (65°F)23 mm (0.9 inches)49%extreme
March Weather18°C (64°F)23 mm (0.9 inches)57%extreme
April Weather14°C (58°F)37 mm (1.5 inches)67%high
May Weather11°C (52°F)67 mm (2.7 inches)75%moderate
June Weather9°C (48°F)44 mm (1.7 inches)79%moderate
July Weather8°C (47°F)73 mm (2.9 inches)80%moderate
August Weather9°C (48°F)73 mm (2.9 inches)75%moderate
September Weather10°C (51°F)66 mm (2.6 inches)69%high
October Weather12°C (55°F)63 mm (2.5 inches)59%very high
November Weather15°C (60°F)57 mm (2.3 inches)56%extreme
December Weather17°C (63°F)35 mm (1.4 inches)50%extreme

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