Last updated: February 25, 2025
September in Perth, Australia ushers in the arrival of spring, showcasing a mild climate with maximum temperatures reaching 21°C (69°F) and a refreshing average of 8°C (47°F). The month experiences a brisk minimum temperature dipping to -3°C (26°F), providing a pleasant contrast to the warmer days. Rainfall is moderate, with 68 mm (2.7 in) spread over 11 days, contributing to the lush landscapes that characterize the season. With humidity levels hovering around 80%, September offers a unique blend of fresh, invigorating air, making it an ideal time for outdoor activities and exploration in this vibrant coastal city.
In September, Perth’s temperatures begin to show signs of spring, with the minimum dipping to a chilly -3°C (26°F), but quickly rising throughout the month to a mild maximum of 21°C (69°F). The average temperature hovers around 8°C (47°F), marking a noticeable shift from the cold winter months preceding it. As the days grow longer and warmer, the city gradually transitions from the crispness of August, bringing a welcome relief from the colder averages of the previous months. This month serves as a bridge, paving the way for more comfortable and vibrant temperatures in the upcoming October.
In September, Perth experiences a notable change in its climate as it transitions from the chill of winter to the warmth of spring. With an average precipitation of 68 mm (2.7 in) across 11 days, the city's rainfall remains consistent when compared to the previous month and mirrors the steady levels observed in March. This trend highlights a gradual increase in precipitation as Perth prepares for the upcoming hotter months. The weather patterns suggest a lush awakening of nature, as the spring rains support the growth of vibrant flora, setting a picturesque scene for residents and visitors alike. Overall, September balances rainfall with the anticipation of sunnier days ahead, painting a dynamic picture of Perth's seasonal transformation.
In September, Perth experiences a relatively high humidity level of 80%, marking a continuation of the trend seen in the cooler months. Following the peak humidity levels of 84% in July and August, September’s figures indicate a slight decrease as the city transitions into spring. This seasonal shift reveals a gradual decline from the winter months, though humidity remains noticeably elevated compared to the earlier summer months, such as January and February, where values were closer to 69% and 68% respectively. The persistent humidity this month serves as a reminder of the region's unique climate, bridging the gap between winter's chill and the warmer air that the upcoming months promise.
In September, Perth experiences a UV Index of 6, placing it in the high exposure category, with a burn time of just 25 minutes. This marks a transition from the cooler, lower exposure months of winter, as UV levels begin to rise again following a low of 2 during June and July. Compared to August's moderate index of 4, September heralds the return of more intense sun, making it essential for residents and visitors alike to take sun safety precautions. As we move towards summer, it’s crucial to stay informed and protected under the increasing UV index levels in Perth. For more detailed insights, check out the Perth UV Index.
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As September rolls into Perth, Australia, residents are graced with 260 hours of sunshine, marking a delightful transition from the cooler winter months. This increase in daylight hours reflects a gradual brightening trend as the city shakes off the chill of winter, with sunshine levels steadily climbing from the 191 hours recorded in June. Compared to the preceding months, September's sun brings a welcome warmth, reminiscent of early spring, and sets the stage for even sunnier days ahead, as October promises 299 hours of radiant light. This gentle resurgence of sunlight not only uplifts spirits but also signals the onset of outdoor activities, inviting both locals and visitors alike to bask in Perth's vibrant atmosphere.
In September, Perth, Australia enjoys a 43% chance of sunny weather, making it one of the more favorable months for sunshine as the city transitions into spring. This percentage reflects a slight increase in sunny days compared to the winter months of June (19%) and July (31%), as well as August (32%), signaling the end of the colder season. While it doesn't quite reach the levels seen in the peak summer months, September's sunshine potential is certainly an invitation for outdoor activities and exploration. As October approaches, the chance of sun dips slightly to 30%, suggesting that September is an ideal time to bask in the emerging warmth before the heat of summer fully arrives.
As September unfolds in Perth, Australia, the days begin to lengthen, stretching to 11 hours of daylight. This marks a gradual transition from the winter months of June, July, and August, when daylight was consistently at its shortest, averaging around 9 hours. With the arrival of spring, daylight duration steadily increases, a trend that will continue into the warmer months. By the end of October, the days will extend to 13 hours, paving the way for the sunny days of summer ahead. It's a time of renewal, as nature awakens and Perth's vibrant life blossoms under the ever-increasing sunlight.
As September rolls in, Perth experiences a gentle but notable increase in wind speed, averaging 3.6 m/s (8 mph), just shy of the breezy heights of August. This upward trend reflects the transition into spring, with winds becoming more invigorating after the milder winter months. Compared to the preceding months, September's breezes signal a shift—greater than the 3.0 m/s of July and April but slightly less than August's peak. The consistent winds carry the promise of warmer days ahead, inviting residents and visitors alike to enjoy the vibrant atmosphere that characterizes Perth during this time of year. As summer approaches, the refreshing currents become a welcome companion for outdoor activities, underscoring the dynamic yet enjoyable climate of this Australian gem.
The weather in Perth 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 Perth and find detailed weather information for every month.
September and January present contrasting weather experiences. In September, temperatures range from a chilly minimum of -3°C (26°F) to a comfortable maximum of 21°C (69°F), with an average around 8°C (47°F). This month also sees higher precipitation, totaling 68 mm (2.7 in) across 11 days, contributing to a humidity level of 80%. In stark contrast, January brings milder temperatures, with minimums of 4°C (40°F) and maximums soaring up to 33°C (91°F), averaging 17°C (64°F). Additionally, January experiences less rainfall, totaling 50 mm (2.0 in) over just 5 days, along with a lower humidity of 69%. For more detailed information on January weather in Perth, refer to Perth weather in January.
September and February exhibit quite contrasting weather patterns. In September, temperatures range from a minimum of -3°C (26°F) to a maximum of 21°C (69°F), with an average temperature of 8°C (47°F). The month experiences 68 mm (2.7 in) of precipitation over 11 days, accompanied by high humidity levels at 80%. In contrast, February is considerably warmer, featuring temperatures that span from a minimum of 3°C (37°F) to a blistering 33°C (92°F), with an average of 16°C (61°F). Although February also sees a total of 68 mm (2.7 in) of precipitation, it falls over just 8 days, resulting in lower humidity at 68%. These differences highlight the transition from the cooler, wetter conditions of September to the warmer and drier environment of February. For more detailed information, visit Perth weather in February.
In September, temperatures in Perth range from a chilly -3°C (26°F) at night to a mild 21°C (69°F) during the day, with an average of 8°C (47°F). The month experiences a relatively high humidity of 80% and sees precipitation on 11 days, totaling 68 mm (2.7 in). In contrast, March boasts warmer temperatures, with lows of 1°C (35°F) and highs reaching a comfortable 31°C (88°F), averaging 15°C (59°F). This month has slightly less humidity at 72% and fewer rainy days, with precipitation also totaling 68 mm (2.7 in) over just 9 days. For more details on the weather specifics, you can check out Perth weather in March.
In September, weather conditions start to shift as the temperatures range from a minimum of -3°C (26°F) to a comfortable maximum of 21°C (69°F), averaging around 8°C (47°F). The month sees about 68 mm (2.7 in) of precipitation over 11 days, with humidity levels averaging 80%. In contrast, April offers slightly warmer temperatures, with a minimum of -2°C (29°F) and a maximum of 25°C (77°F), averaging 12°C (53°F). Precipitation in April is relatively lower at 58 mm (2.3 in) spread across 7 days, coupled with a slightly lower humidity of 77%. For a more detailed look at the weather in April, you can check Perth weather in April.
September and May both feature cool temperatures, but September generally experiences a wider range. In September, temperatures fluctuate from a chilly minimum of -3°C (26°F) to a pleasant maximum of 21°C (69°F), with an average of 8°C (47°F). In contrast, May has slightly warmer averages, with temperatures ranging from -2°C (30°F) at night to a maximum of 20°C (68°F), resulting in an average of 9°C (49°F).
Precipitation is also a defining characteristic of both months, with September receiving 68 mm (2.7 in) across 11 days of rain, while May sees a bit more rain, totaling 77 mm (3.0 in) over 9 days. Humidity levels are similar, with September at 80% and May slightly higher at 83%. For a more detailed look at weather patterns, you can check out Perth weather in May.
When comparing the weather in September and June, September tends to be slightly warmer with average temperatures reaching 8°C (47°F) and a maximum of 21°C (69°F), while June typically sees cooler temperatures with a maximum of only 15°C (60°F). Interestingly, September also experiences more rainfall, averaging 68 mm (2.7 in) over 11 days, compared to June's 55 mm (2.2 in) over 9 days. Humidity levels are quite similar, with September at 80% and June at 83%, indicating a generally damp climate in both months. For more detailed insights, you can visit Perth weather in June.
In comparing the weather of September and July, September tends to be milder with average temperatures around 8°C (47°F) and a maximum of 21°C (69°F), while July experiences cooler conditions, averaging 6°C (44°F) with a maximum of only 14°C (58°F). Interestingly, July has slightly lower humidity at 84% compared to September's 80%, but receives more precipitation, with a total of 89 mm (3.5 in) across 12 days. In contrast, September records 68 mm (2.7 in) of precipitation over 11 days. For a closer look at July's weather specifics, you can check Perth weather in July.
In comparing the weather of September and August, September generally experiences slightly warmer conditions, with an average temperature of 8°C (47°F) compared to August's 7°C (45°F). Both months have a minimum temperature of -3°C, but September boasts a higher maximum temperature of 21°C (69°F), significantly warmer than August's maximum of 15°C (60°F). Precipitation levels are relatively similar, with September receiving 68 mm (2.7 in) over 11 days, while August sees 70 mm (2.8 in) over 12 days. Humidity is slightly lower in September at 80%, compared to 83% in August. For more detailed insights, you can explore Perth weather in August.
September and October present a noticeable shift in weather patterns. In September, temperatures range from a chilly minimum of -3°C (26°F) to a maximum of 21°C (69°F), with an average of 8°C (47°F). This month sees about 68 mm (2.7 in) of precipitation over 11 days, accompanied by high humidity at 80%. In contrast, October brings slightly warmer conditions, with a minimum of -1°C (31°F) and a maximum of 25°C (78°F), leading to a higher average of 11°C (52°F). Precipitation increases to 85 mm (3.4 in) spread over 12 days, but humidity dips to 76%. For those interested in the specifics of October weather, you can check this link: Perth weather in October.
September and November showcase distinct weather characteristics. In September, temperatures range from a chilly minimum of -3°C (26°F) to a pleasant maximum of 21°C (69°F), with an average of 8°C (47°F). The month experiences a fair amount of precipitation, totaling 68 mm (2.7 in) over 11 days, accompanied by relatively high humidity at 80%. In contrast, November offers warmer temperatures with a minimum of 0°C (32°F) and a notable maximum of 28°C (83°F), averaging 13°C (56°F). This month sees less rainfall, with 56 mm (2.2 in) over 9 days, and humidity slightly lower at 76%. For a closer look at the weather during this month, you can refer to Perth weather in November.
In September, the weather in Perth is characterized by a cooler temperature range, with a minimum of -3°C (26°F) and an average of 8°C (47°F), reaching a maximum of 21°C (69°F). This month sees about 68 mm (2.7 in) of precipitation spread over 11 days, along with relatively high humidity at 80%. In contrast, December brings significantly warmer temperatures, with a minimum of 3°C (37°F) and an average of 15°C (60°F), peaking at 33°C (92°F). Although precipitation slightly increases to 71 mm (2.8 in), it occurs over fewer days (7 days) and the humidity drops to 71%. For a detailed look at the weather during this month, check out Perth weather in December.
As Perth transitions into spring in September, the weather becomes a delightful mix of warmth and crispness, distinguishing it from the colder winter months. With an average temperature steadily rising, days grow pleasantly mild, though the nights can still feel quite cool. This month also sees a slight increase in precipitation, reminding us that spring can be unpredictable. The humidity level remains relatively high, adding to the season's vibrancy. For those looking to delve deeper into Perth's climate nuances, visit Perth Climate for a comprehensive overview.