September Weather in Mersing, Malaysia

Last updated: August 21, 2025

In September, Mersing, Malaysia, experiences a tropical climate characterized by warm temperatures and high humidity. Daily maximums reach around 32°C (90°F), with average temperatures hovering at 27°C (81°F) and minimums settling at 24°C (75°F), creating a consistently warm atmosphere. However, this month also brings significant precipitation, totaling 204 mm (8.0 in) over approximately 26 days, making it one of the wetter periods of the year. With humidity levels soaring to 85%, visitors can expect a muggy environment punctuated by frequent rain showers, perfect for those who enjoy the lush, green scenery that follows the rains.

September Temperature in Mersing

In September, Mersing, Malaysia experiences warm and consistent temperatures, typical of its tropical climate. With a minimum of 24°C (75°F) and a maximum reaching 32°C (90°F), the average hovers around 27°C (81°F), providing a comfortable warmth that invites exploration. As the month progresses, these temperatures remain stable, setting a perfect backdrop for both adventure and relaxation. This consistency can be seen as a continuation of the dry conditions from previous months, making September an ideal time for visitors to enjoy the beautiful beaches and lush landscapes Mersing has to offer. Overall, the temperature trends this month align closely with the preceding months, emphasizing the region's reliable and inviting tropical essence.

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

The chart illustrates September temperature patterns in Mersing, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mersing, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec808081828282818181818080
Data source: Temperature data for Mersing 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 Mersing

September in Mersing, Malaysia, experiences 204 mm (8.0 in) of precipitation, continuing the trend of abundant rainfall seen throughout the year. With rain falling on 26 days, September’s weather is characterized by consistent, moderate downpours, contributing to the lush, vibrant landscapes typical of this tropical region. This month is slightly less wet than the preceding August, which received 150 mm (5.9 in), yet it can still be quite damp. As the region transitions into October, rainfall begins to increase again, indicating the onset of the heaviest months ahead. Overall, September maintains the region's reputation for high humidity and frequent rain, laying the groundwork for the lush greenery that defines Malaysia's natural beauty.

September Precipitation Trends in Mersing

The chart displays monthly precipitation patterns in Mersing, 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 Mersing, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec310109160189206179146151204238355310
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mersing

In September, Mersing, Malaysia, experiences a notable humidity level of 85%, which is consistent with the increased humidity trend seen throughout the summer months. Following the peak of 86% in January, the pattern reveals a gradual decline in humidity until reaching its low of 76% in April. However, as the year progresses, humidity begins to rise again, indicating a natural ebb and flow. By September, the humidity stabilizes, mirroring the levels recorded in August. This steady climate, characterized by high humidity, sets the stage for lush landscapes and vibrant ecosystems, contributing to the region's rich biodiversity. With October and November maintaining similar levels, the overall humidity in Mersing reinforces its tropical allure, making it an invigorating destination year-round.

September Average Humidity in Mersing

This chart illustrates the average monthly humidity levels in Mersing, 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 Mersing is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%81%82%76%81%82%83%85%85%84%84%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mersing

In September, Mersing, Malaysia maintains its trend of high UV exposure, with a UV Index of 14, categorizing it as extreme. This consistent intensity is characteristic of coastal Malaysia, where the risk of sunburn remains significant, with an estimated burn time of just 10 minutes under these conditions. Interestingly, the UV Index has remained stable throughout the months leading up to September, fluctuating between 12 and 16, indicating a persistent need for sun protection. As the sun's rays continue to pose a threat, it’s crucial for residents and visitors alike to stay vigilant. For more detailed information, visit Mersing UV Index.

Maximum UV Index Levels in Mersing for September

The chart shows the monthly maximum UV Index (UVI) for Mersing 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 Mersing typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131516151412121414141313
Data source: Mersing 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 Mersing

September in Mersing, Malaysia, offers a delightful balance of sunshine, boasting 295 hours of bright daylight. This month reflects a slight decline from the vibrant summer months of July and August, which recorded 312 and 310 hours respectively. However, September still stands out as part of an overall trend of consistent sunshine throughout the year, with the warmer months—March through August—averaging well over 290 hours. As the year progresses into the latter months, daylight hours begin to taper off, but September's sunny disposition ensures that the transition into fall retains its warmth and charm, keeping the spirit of summer alive just a little longer.

Monthly Sunshine Duration in Mersing: September Highlighted

The September sunshine duration represents the total number of hours Mersing 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.
JanFebMarAprMayJunJulAugSepOctNovDec228h298h325h297h298h293h312h310h295h293h252h288h
Data source: Mersing September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Mersing During September

As September arrives in Mersing, Malaysia, the likelihood of enjoying sunny weather sees a notable increase, with a 26% chance of sunshine—one of the higher probabilities for the year. This uptick follows a summer of fluctuating sunny days, where June and July dipped to just 20% and 13%, respectively. Historically, September marks a transition toward more favorable weather, as the rainy season edges closer, yet it stands out with a promising outlook compared to the preceding months of May and August, which offered only 17% and 16% chances of sun. This trend suggests that travelers keen on basking in the sun may find September to be an ideal time to explore this tropical paradise.

Percentage of Sunny Days in September in Mersing

The chart illustrates the percentage of sunny days in Mersing 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 Mersing experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec6%21%22%28%18%20%13%16%26%17%8%7%
Data source: Mersing September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Mersing in September

In September, Mersing, Malaysia enjoys a consistent 12 hours of daylight, continuing the trend established since April. This equilibrium of day length creates a wonderful opportunity for both locals and visitors to soak up the sun's warmth and engage in outdoor activities. As the month unfolds, the daylight duration remains steady, reflecting a harmonious balance characteristic of the region's tropical climate. Looking ahead, this pattern persists into October before subtly shifting to shorter days as the year draws to a close, making September an ideal time to experience Mersing's vibrant landscapes under the golden sun.

Average Daylight Hours in Mersing for September

The chart illustrates the variation in daylight duration in Mersing throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 59m12h 1m12h 5m12h 9m12h 12m12h 14m12h 13m12h 10m12h 6m12h 2m11h 59m11h 58m
Data source: Mersing daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Mersing

In Mersing, Malaysia, September marks a subtle transition in the wind patterns, slightly softer than the previous months, with an average wind speed of 2.3 m/s (5 mph). Throughout the year, wind speeds typically fluctuate, peaking in January at 4.9 m/s (11 mph), but after the mid-year mark, the breezes soften significantly, dipping to their lowest in May at 1.9 m/s (4 mph). As summer fades into fall, September's winds remain gentle, mirroring the calm of its predecessors in July and August. This serene atmosphere sets the stage for a tranquil experience, as the coastal charm of Mersing is gently cradled by the whispering breezes that continue into October and beyond.

Average September Wind Speed in Mersing

The chart displays monthly wind speed patterns in Mersing, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.94.73.22.01.92.12.62.42.3 m/s2.32.04.1
Data source: Mersing September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Mersing Compares to Other Months

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

In September, the weather in Mersing features warm temperatures, with a minimum of 24°C (75°F) and an average of 27°C (81°F), reaching a maximum of 32°C (90°F). However, this month also experiences significant precipitation, totaling 204 mm (8.0 in) over 26 days with a humidity level of 85%.

Conversely, January presents a similar temperature profile, with a minimum of 23°C (73°F), an average of 27°C (80°F), and a maximum of 32°C (91°F). Despite having a slightly lower number of rainy days at 21, January sees a higher total precipitation of 310 mm (12.2 in) and an increased humidity of 86%. For more detailed information, you may refer to Mersing weather in January.

Overall, while both months share similar temperatures, January tends to be wetter and slightly more humid compared to September.

In September, the weather is characterized by higher humidity at 85% and a significant amount of rainfall, with an average precipitation of 204 mm over 26 days. The temperatures are warm, with a minimum of 24°C (75°F), an average of 27°C (81°F), and a maximum reaching 32°C (90°F). In contrast, February offers a slightly drier climate, with lower humidity at 81% and a total of 109 mm of precipitation over 17 days, making it less rainy. The temperatures remain similar, with a minimum of 24°C (75°F), an average of 27°C (80°F), and a maximum of 31°C (87°F). For more detailed insights on February weather, check out Mersing weather in February.

In comparing September and March, both months share similar average temperatures, ranging from a minimum of 24°C (75°F) to a maximum of 32°C (90°F). However, September is notably wetter, experiencing a total precipitation of 204 mm (8.0 in) over 26 days, while March sees less rainfall at 160 mm (6.3 in) spread across 20 days. Additionally, September's humidity is slightly higher at 85%, compared to March's 82%. For more details on March weather, you can visit Mersing weather in March.

In comparing the weather of September and April, both months exhibit warm temperatures, with April being slightly warmer on average. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 32°C (90°F), while April shows similar minimum temperatures but reaches a higher maximum of 33°C (91°F). Rainfall is significant in both months, with September receiving 204 mm (8.0 in) of precipitation over 26 days, whereas April registers slightly less at 189 mm (7.5 in) during the same number of rainy days. Additionally, humidity levels are higher in September at 85%, compared to April's 76%. For a more detailed look at April weather, you can visit Mersing weather in April.

In comparing the weather of September and May, both months share a similar minimum temperature of 24°C (75°F), creating a warm foundation. However, May tends to be slightly warmer on average, with an average temperature of 28°C (83°F) compared to September's 27°C (81°F). The maximum temperatures are also marginally higher in May, reaching up to 33°C (92°F), as opposed to September's peak of 32°C (90°F).

Precipitation is a common feature in both months, with September receiving around 204 mm (8.0 in) over 26 days and May experiencing even more rain at 206 mm (8.1 in) spanning 29 days. Humidity levels are notably high in both months, although September has a slightly higher average at 85% compared to May's 81%. For more detailed insights on May weather, you can visit Mersing weather in May.

When comparing the weather conditions of September and June, there are several similarities and differences to note. Both months feature a minimum temperature of 24°C (75°F) and a maximum temperature that reaches up to 32°C (90°F in September and 91°F in June), indicating consistently warm temperatures. However, the average temperature is slightly higher in June at 28°C (82°F) compared to September's 27°C (81°F).

In terms of precipitation, September is significantly wetter, with 204 mm (8.0 in) over 26 days, compared to June's 179 mm (7.0 in) over 27 days. This indicates that September experiences a higher volume of rain, while June has a longer duration of precipitation days. Humidity levels are comparable, with September at 85% and June at 82%, contributing to the overall muggy feel during both months. For more specific details about Mersing's climate in June, you can check this link: Mersing weather in June.

In both July and September, the weather conditions remain strikingly similar, with minimum, average, and maximum temperatures consistently hovering around 24°C (75°F), 27°C (81°F), and 32°C (90°F), respectively. However, September experiences notably higher precipitation levels, with 204 mm (8.0 in) of rainfall over 26 days, compared to July’s 146 mm (5.7 in) over the same number of days. Additionally, while the humidity remains high in both months, September's average humidity is slightly elevated at 85% compared to July's 83%. For more detailed insights on July weather in Mersing, you can refer to Mersing weather in July.

In comparing the weather of September and August, both months exhibit similar temperature ranges, with minimums around 24°C (75°F), average temperatures at 27°C (81°F), and maximums reaching 32°C (90°F). However, September sees a significant increase in precipitation, totaling 204 mm (8.0 in) over 26 days, while August has lower rainfall at 150 mm (5.9 in) across 27 days. Both months share a high humidity level of 85%, contributing to the tropical feel of the region. For more details on August weather, you can check Mersing weather in August.

In September, temperatures in Mersing typically range from a minimum of 24°C (75°F) to a maximum of 32°C (90°F), with an average of 27°C (81°F). The month features significant precipitation, totaling 204 mm (8.0 in) over 26 days and maintaining a high humidity level of 85%.

Conversely, October sees a slight increase in maximum temperatures, peaking at 33°C (92°F), while the minimum and average remain unchanged at 24°C (75°F) and 27°C (81°F), respectively. Rainfall also increases to 238 mm (9.4 in) over the same number of rain-soaked days, but humidity modestly decreases to 84%. For more insights on October weather in Mersing, visit Mersing weather in October.

In September, the weather typically features a warm average temperature of 27°C (81°F) with a maximum of 32°C (90°F), but it is also characterized by significant rainfall, totaling 204 mm (8.0 in) over 26 rainy days and a high humidity of 85%. In contrast, November maintains a similar temperature profile, with min, avg, and max temperatures hovering around 24°C (76°F), 27°C (81°F), and 32°C (89°F) respectively. However, November experiences a notable increase in precipitation, receiving 355 mm (14.0 in) across 29 days, coupled with a slightly lower humidity level of 84%. For a detailed look at the climate specifics, you can refer to Mersing weather in November.

In comparing the weather between September and December, both months exhibit similar temperature ranges, with minimums around 24°C (75°F), averages near 27°C (81°F), and maximums hitting 32°C (90°F in September and 89°F in December). However, December brings increased rainfall, totaling 310 mm (12.2 in) over 28 days, compared to September's 204 mm (8.0 in) across 26 days. This also contributes to a slightly higher humidity level in December at 88%, compared to 85% in September. For a more detailed overview, you can check Mersing weather in December.

Compare Mersing's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Mersing

As September unfolds in Mersing, it brings a unique blend of tropical warmth and substantial rainfall, setting itself apart from the drier months. With temperatures consistently hovering around 27°C on average, the heat is tempered by high humidity levels of 85% that create a muggier atmosphere. This month is marked by significantly increased precipitation, with nearly 26 rainy days contributing to a total of 204 mm of rain, making it one of the wettest periods of the year. While the weather may pose challenges for outdoor activities, it fosters lush landscapes and vibrant flora unique to the region. For a deeper dive into Mersing's overall climate patterns, you can visit Mersing Climate.