September Weather in Mandurah, Australia

Last updated: February 26, 2025

September in Mandurah, Australia brings a delightful transition into spring, characterized by mild temperatures and refreshing breezes. With a maximum temperature reaching 26°C (80°F) and an average of 15°C (59°F), days are comfortably warm, while cooler nights drop to a minimum of 6°C (43°F). This month also sees about 48 mm (1.9 in) of precipitation spread across 8 days, contributing to the region's lush landscapes. Coupled with a humidity level of 71%, September provides a perfect backdrop for enjoying the natural beauty of Mandurah, making it an inviting time for both residents and visitors alike.

September Temperature in Mandurah

In September, Mandurah experiences a gentle transition from winter to spring, with temperatures gradually warming up. The month begins with chilly nights at a minimum of about 6°C (43°F), but the days become more pleasant, averaging around 15°C (59°F). Daily highs reach approximately 26°C (80°F), heralding the approach of warmer weather. This is a significant increase compared to the cooler months of July and August, where maximums hovered around the low 20s. As spring unfolds, you can expect increasingly mild days and a refreshing vibe, making it a delightful time to enjoy the seaside atmosphere and blooming landscapes.

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

The chart illustrates September temperature patterns in Mandurah, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec737372666158575759616671
Data source: Temperature data for Mandurah generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Mandurah

In September, Mandurah experiences a transitional phase in its weather, with 48 mm (1.9 in) of precipitation spread over 8 days. This month marks a slight shift from the wetter winter months, where June and July typically dominate with their highest rainfall amounts. As spring approaches, the precipitation in September offers a refreshing reprieve, revealing a gradual decrease compared to the preceding months of August and July, which both recorded over 100 mm. This trend hints at a lessening of the seasonal rains, setting the stage for drier conditions as the calendar moves toward the warmer months. Overall, September's rainfall reflects a delicate balance between lingering winter influences and the upcoming dryness of summer.

September Precipitation Trends in Mandurah

The chart displays monthly precipitation patterns in Mandurah, 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.
JanFebMarAprMayJunJulAugSepOctNovDec23542425651221341074842279
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Mandurah

As September rolls around in Mandurah, Australia, the humidity settles at 71%, marking a slight decrease from the peak seen in the mid-winter months of 77% in both June and July. This gradual decline from the earlier high levels mirrors the seasonal shift towards spring, providing a refreshing transition. Following this month, October is expected to bring even lower humidity at 63%, indicating a continued drop as warmer weather approaches. The trend throughout the year shows that the humidity typically rises from the drier start of the year in January, peaking mid-year before gradually tapering off as the warmer months begin. This rhythmic pattern of humidity levels highlights the region's characteristic climate, balancing between comfort and moisture.

September Average Humidity in Mandurah

This chart illustrates the average monthly humidity levels in Mandurah, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec53%55%59%70%72%77%77%75%71%63%56%53%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mandurah

In September, Mandurah experiences a noticeable transition in its UV Index, marking the onset of spring. With a UV Index of 8 classified as very high, it’s crucial for residents and visitors to remain vigilant about sun exposure, as the burn time is approximately 15 minutes. This month’s index reflects a gradual uptick from the milder winter months of June and July, where the UV levels dropped to 4. As the year progresses into October, the UV Index is expected to soar again to 11, showing a consistent pattern of increased solar intensity during the warmer months. For further details on how to protect yourself from harmful UV rays, check out the Mandurah UV Index.

Maximum UV Index Levels in Mandurah for September

The chart shows the monthly maximum UV Index (UVI) for Mandurah 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.
JanFebMarAprMayJunJulAugSepOctNovDec141411864468111314
Data source: Mandurah 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.

September Sunshine in Mandurah

As September rolls into Mandurah, Australia, the warmth of the sun begins to beckon locals and visitors alike, offering a delightful 295 hours of sunshine. This month marks a gentle transition from the winter chill of June and July, which saw significantly fewer sunlit hours, to the vibrant days of summer ahead. While September enjoys a notable increase from the previous months, it remains a precursor to the upcoming months, with October set to shine even brighter at 327 hours. This trend reveals a steady progression of daylight, hinting at the sun-soaked adventures that await as the Australian spring unfolds, leading into the summer's peak luminosity in December with an impressive 384 hours of sunshine.

Monthly Sunshine Duration in Mandurah: September Highlighted

The September sunshine duration represents the total number of hours Mandurah experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec310h317h323h290h277h260h271h285h295h327h352h384h
Data source: Mandurah September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Mandurah During September

In Mandurah, Australia, September marks a notable rebound in sunny weather after the cooler winter months, with a 65% chance of clear skies this time of year. As the seasons transition, this month sits comfortably above the average chance of sun compared to the wetter autumn months of April and May, which dip to 54% and 42% respectively. While January and December boast the highest probabilities of sunshine, September's forecast is a bright spot, offering a delightful mix of pleasant conditions just as spring begins. Overall, this trend suggests September is a promising month for enjoying the sun before the unpredictable weather of late spring takes hold.

Percentage of Sunny Days in September in Mandurah

The chart illustrates the percentage of sunny days in Mandurah throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Mandurah experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec75%71%59%54%42%51%39%55%65%48%65%78%
Data source: Mandurah September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Mandurah in September

As September rolls into Mandurah, Australia, daylight begins to stretch its arms, offering 11 hours of sunlight each day. This increase marks a delightful transition from the still dark winter months of July to August, where daylight remained at a consistent 10 hours. The gradual shift from 10 hours to 11 hours heralds the approach of spring, hinting at longer, more vibrant days ahead. Following September, daylight continues to rise, reaching 12 hours in October, then peaking at 14 hours in December. This rhythmic dance of daylight not only brings warmth and vitality to the landscape but also signifies a fresh start as nature bursts back to life.

Average Daylight Hours in Mandurah for September

The chart illustrates the variation in daylight duration in Mandurah throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec14h13h 13m12h 15m11h 15m10h 25m10h 1m10h 14m10h 56m11h 53m12h 53m13h 46m14h 14m
Data source: Mandurah daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Mandurah

As September rolls into Mandurah, the average wind speed settles at a gentle 4.5 m/s (10 mph), reflecting a continuation of the mild breezes that define the month. This speed remains steady compared to the shifts of the previous months, showcasing a pattern that transitions from the stronger gusts of July, which peaked at 6.2 m/s (14 mph), down to the more tranquil winds of October. After a summer of lively breezes, the gradual decrease through late winter into spring signals a calming atmosphere, inviting both locals and visitors to enjoy the serene coastal views unhindered by strong winds. As the weather warms, September serves as a gentle bridge, gradually nudging towards the more active wind patterns of late spring and early summer.

Average September Wind Speed in Mandurah

The chart displays monthly wind speed patterns in Mandurah, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.05.74.54.04.34.56.24.84.5 m/s4.85.15.6
Data source: Mandurah September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Mandurah Compares to Other Months

The weather in Mandurah changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Mandurah and find detailed weather information for every month.

In September, the weather is quite mild, with average temperatures around 15°C (59°F) and a maximum of 26°C (80°F), accompanied by higher humidity levels of 71%. Rain is a frequent visitor during this month, with about 48 mm (1.9 in) of precipitation over approximately 8 days. In contrast, January experiences significantly warmer temperatures, with averages of 23°C (73°F) and highs reaching 36°C (96°F). The humidity drops to 52%, and the month is much drier, with only about 22 mm (0.9 in) of rain and no recorded rainy days. For more details on January weather in Mandurah, you can refer to Mandurah weather in January.

In comparing the weather between September and February, there are notable differences in temperature and humidity. September experiences cooler temperatures, ranging from a minimum of 6°C (43°F) to a maximum of 26°C (80°F), with an average of 15°C (59°F). The month also sees a higher humidity level of 71% and approximately 48 mm (1.9 in) of precipitation over 8 days. Conversely, February offers warmer conditions, with temperatures soaring from a minimum of 13°C (55°F) to a maximum of 36°C (96°F) and an average of 23°C (73°F). February is also less humid, averaging 55%, and sees less frequent rain, with about 53 mm (2.1 in) spread over just 3 days. For more details on February weather, you can check out Mandurah weather in February.

When comparing the weather in September and March, it's clear that March tends to be warmer and drier. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 26°C (80°F) with an average of 15°C (59°F), while March sees a minimum of 11°C (51°F) and a peak of 34°C (94°F), averaging 22°C (72°F). Precipitation is also lower in March, with only 24 mm (0.9 in) over 5 days compared to September's 48 mm (1.9 in) over 8 days. Additionally, humidity levels in March (59%) are notably lower than in September (71%). For more details, check out Mandurah weather in March.

When comparing the weather in September and April, notable differences emerge. September typically sees cooler temperatures, with an average of 15°C (59°F) and a maximum of 26°C (80°F), while April enjoys warmer conditions, averaging 19°C (67°F) and peaking at 33°C (91°F). Additionally, September experiences more precipitation, with 48 mm (1.9 in) over 8 days, compared to April's lighter rains of 25 mm (1.0 in) over just 2 days. Both months have similar humidity levels, around 70-71%. For a closer look at the weather specifics during April, you can check Mandurah weather in April.

In comparing the weather patterns of September and May, we notice that both months boast a maximum temperature of 27°C (80°F), but May tends to be slightly warmer overall with an average temperature of 16°C (61°F) compared to September's 15°C (59°F). September showcases a lower minimum temperature of 6°C (43°F) versus May's 7°C (44°F). While both months experience precipitation on approximately 8 days, May receives more rainfall, totaling 65 mm (2.6 in), compared to September's 48 mm (1.9 in). Humidity levels are quite similar in both months, with September at 71% and May at 72%. For more detailed insights, check out Mandurah weather in May.

When comparing the weather in September and June, we notice some distinct differences. September tends to feature slightly warmer daytime temperatures, with a maximum of 26°C (80°F) compared to June's peak of 24°C (75°F). Additionally, September sees less precipitation, with 48 mm (1.9 in) over 8 days, while June experiences significantly more rain, totaling 122 mm (4.8 in) across 12 days. Humidity levels are also slightly lower in September at 71%, compared to June's 77%. For a more detailed look at June in Mandurah, you can visit Mandurah weather in June.

When comparing the weather in September and July, we can observe some notable differences. September sees a broader temperature range, with a minimum of 6°C (43°F), an average of 15°C (59°F), and a maximum of 26°C (80°F), while July has slightly higher minimum temperatures at 7°C (46°F) and a lower maximum of 22°C (71°F). Precipitation is also significantly higher in July, with 134 mm (5.3 in) over 17 days, compared to 48 mm (1.9 in) over just 8 days in September. Additionally, July's humidity is higher at 77%, compared to September's 71%. Overall, September offers milder conditions and less rainfall, making it a drier month compared to July. For more insights into July's weather, check out Mandurah weather in July.

In comparing the weather between September and August, September tends to be slightly warmer with an average temperature of 15°C (59°F) compared to August's 14°C (57°F). The maximum temperature also increases to 26°C (80°F) in September, while August peaks at 24°C (76°F). Rainfall decreases significantly in September, with only 48 mm (1.9 in) over 8 days, compared to August's 107 mm (4.2 in) over 12 days. Additionally, September exhibits slightly lower humidity at 71%, compared to 75% in August, providing a more comfortable atmosphere. For more details on August weather, you can visit Mandurah weather in August.

In comparing the weather patterns of September and October, September tends to be cooler with average temperatures ranging from a minimum of 6°C (43°F) to a maximum of 26°C (80°F). During this month, the region experiences an average humidity of 71% and receives about 48 mm (1.9 in) of precipitation over 8 days. In contrast, October sees a slight increase in temperatures, with averages ranging from a minimum of 7°C (45°F) to a maximum of 31°C (88°F). The humidity decreases to 63% and precipitation is slightly lower at 42 mm (1.7 in) spread over just 6 days. For more detailed weather insights, you can check Mandurah weather in October.

In September, the weather showcases a noticeable range of temperatures with minimums reaching 6°C (43°F) and maximums peaking at 26°C (80°F). This month also brings a fair amount of precipitation, with 48 mm falling over about 8 days and humidity levels averaging 71%. In contrast, November witnesses a more consistent warmth, with minimum temperatures rising to 9°C (48°F) and maxing out at an impressive 34°C (93°F). Additionally, November enjoys less rainfall, totaling just 27 mm over only 3 days, and a reduction in humidity to 56%. For more details on November weather specifically, you can check Mandurah weather in November.

In September, the weather tends to be milder, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 26°C (80°F) and an average of 15°C (59°F). This month sees around 48 mm (1.9 in) of precipitation over 8 days, resulting in a relatively high humidity level of 71%. In contrast, December experiences warmer conditions, with temperatures varying from a minimum of 9°C (49°F) to a scorching maximum of 38°C (100°F), alongside an average temperature of 22°C (72°F). Additionally, December is much drier, with only 9 mm (0.4 in) of precipitation over just 2 days and a lower humidity of 53%. For more detailed insights, you can check the Mandurah weather in December.

Compare Mandurah's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Mandurah

As September rolls into Mandurah, the weather transforms into a refreshing prelude to spring, characterized by pleasantly mild temperatures and a slight uptick in humidity. With average highs reaching a comfortable 26°C, this month stands in contrast to the cooler winter months, inviting outdoor activities and exploration. However, September does bring some occasional showers, with about eight days of precipitation contributing to a total of 48 mm. Unlike the harsher winter, the air feels more invigorating, but still retains some of that crispness from the lingering chill of the colder months. To delve deeper into what you can expect throughout the year, check out the complete details at Mandurah Climate.