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September Weather in Hamilton, Australia

Last updated: August 22, 2025

In Hamilton, Australia, the average temperature in September hovers around 10°C (50°F). Expect a minimum drop to -2°C (28°F) and a pleasant maximum of 26°C (79°F). Throughout the month, you can anticipate 64 mm (2.5 in) of precipitation spread over 12 days, with an average humidity level of 69%.

September Temperature in Hamilton

In September in Hamilton, the average temperature is 10°C (50°F). Maximums can reach 26°C (79°F), and minimums can be as low as -2°C (28°F). This variety in temperatures makes it essential for travelers to pack both warm and light clothing for their visit.

September Weather in Hamilton: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Hamilton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hamilton, September typically has an average temperature of 10°C (50°F), with highs reaching up to 26°C (79°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec666463575147464750545862
Data source: Temperature data for Hamilton 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.

September Precipitation in Hamilton

In Hamilton in September, the total precipitation amount is 64 mm (2.5 in) over the course of 12 days.

September Precipitation Trends in Hamilton

The chart displays monthly precipitation patterns in Hamilton, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Hamilton, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec312530416643636864686240
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hamilton

In Hamilton in September, humidity is 69%. With an average temperature of 10°C (50°F), this humidity feels like a cool mist that clings to your skin, making outdoor activities invigorating yet slightly damp, so travelers should dress in layers to adjust to the refreshing air.

September Average Humidity in Hamilton

This chart illustrates the average monthly humidity levels in Hamilton, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Hamilton is approximately 69%, 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in Hamilton

In Hamilton in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Hamilton.

Maximum UV Index Levels in Hamilton for September

The chart shows the monthly maximum UV Index (UVI) for Hamilton in September, 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 September, the maximum UV index in Hamilton typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec14121174335791214
Data source: Hamilton September 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 September Weather in Hamilton Compares to Other Months

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

This table compares monthly weather conditions in Hamilton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (67°F)31 mm (1.2 inches)45%extreme
February Weather18°C (64°F)25 mm (1.0 inches)49%extreme
March Weather17°C (63°F)30 mm (1.2 inches)57%extreme
April Weather14°C (57°F)41 mm (1.6 inches)67%high
May Weather11°C (51°F)66 mm (2.6 inches)75%moderate
June Weather8°C (48°F)43 mm (1.7 inches)79%moderate
July Weather8°C (47°F)63 mm (2.5 inches)80%moderate
August Weather8°C (47°F)68 mm (2.7 inches)75%moderate
September Weather10°C (50°F)64 mm (2.5 inches)69%high
October Weather12°C (54°F)68 mm (2.7 inches)59%very high
November Weather15°C (59°F)62 mm (2.5 inches)56%extreme
December Weather17°C (62°F)40 mm (1.6 inches)50%extreme

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