September Weather in Westmalle, Belgium

Last updated: August 21, 2025

In September, Westmalle, Belgium experiences a dynamic range of temperatures, with maximums reaching up to 33°C (92°F) and minimums dipping to 3°C (39°F). The average temperature hovers around a comfortable 16°C (60°F), providing a pleasant climate for outdoor activities. However, this month also brings occasional rainfall, with a total precipitation of 56 mm (2.2 in) over approximately 10 days, contributing to the area's lush, green landscapes. The air is often humid, averaging around 82%, which can add a touch of mugginess to the late summer atmosphere. Overall, September in Westmalle offers a captivating blend of warmth, occasional showers, and a backdrop of vibrant autumn colors.

September Temperature in Westmalle

In September, Westmalle experiences a pleasant transition from the summer heat, with temperatures ranging from a minimum of 3°C (39°F) to a comfortable average of 16°C (60°F), peaking at a maximum of 33°C (92°F). This month showcases a notable drop from the sweltering averages of August, marking the onset of autumn while still holding onto the warmth of summer. Despite the cooling trend, September can still surprise with warm days, creating a delightful balance for outdoor activities and local festivities. As the leaves begin to change, the refreshing air invites visitors to explore the scenic beauty of this charming Belgian town.

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

The chart illustrates September temperature patterns in Westmalle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Westmalle, 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).
JanFebMarAprMayJunJulAugSepOctNovDec394245505765666660544542
Data source: Temperature data for Westmalle 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 Westmalle

In September, Westmalle experiences a moderate decline in precipitation, with a total of 56 mm (2.2 in) falling over 10 days. This marks a noticeable decrease from the wettest months of August and July, hinting at a gradual transition into the cooler autumn season. The rainfall, while lighter compared to the summer months, still plays a crucial role in replenishing the region's lush greenery. As temperatures begin to dip, the sharper contrast in precipitation levels foreshadows the heavier rains of October, which tends to bring an average of 84 mm (3.3 in). This cyclical pattern of weather not only signifies the onset of fall but also sets the stage for a vibrant tapestry of colors in the surrounding landscapes.

September Precipitation Trends in Westmalle

The chart displays monthly precipitation patterns in Westmalle, 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 Westmalle, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec657272386566777856845793
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Westmalle

In September, Westmalle, Belgium, experiences a notable increase in humidity, rising to 82% after the summer months. This shift reflects a gradual transition as the region moves from the drier conditions of August, which had a humidity level of 76%, back towards the more humid autumn. Throughout the year, humidity tends to decline from the peak winter levels of around 91% in January, hitting a low in the summer, before creeping back up as the cooler months approach. This consistency in humidity levels, particularly the uptick in September, signals the return of wetter weather and prepares the landscape for the rain-soaked months ahead. As fall sets in, residents can expect air that feels more saturated, heralding the lush, green scenery that Belgium is known for.

September Average Humidity in Westmalle

This chart illustrates the average monthly humidity levels in Westmalle, 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 Westmalle is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%85%82%82%80%76%82%89%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Westmalle

As September rolls into Westmalle, Belgium, the UV Index begins to dip, reflecting a transition to more moderate outdoor sun exposure. With an index of 5, this month's exposure category is categorized as moderate, allowing for a safe burn time of 30 minutes. This slight decrease from the summer highs of 8 in July and June indicates that while the sun’s intensity is reducing, precautions are still essential for those enjoying the outdoors. The resume to milder UV levels also hints at the charming arrival of autumn, encouraging residents to savor the gentle sunshine before the colder months arrive. For more detailed information on sun safety, check out the Westmalle UV Index.

Maximum UV Index Levels in Westmalle for September

The chart shows the monthly maximum UV Index (UVI) for Westmalle 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 Westmalle typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Westmalle 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 Westmalle

As summer gradually transitions to autumn, September in Westmalle, Belgium boasts a delightful 315 hours of sunshine, marking a gentle decline from the sun-soaked peak of July's 403 hours. This month reflects the natural ebb of daylight, yet still offers a substantial amount of sunshine for outdoor activities and leisurely strolls. Following the sun-drenched months of May through August, September provides a warm atmosphere that invites locals and visitors alike to savor the lingering warmth of early fall. As days grow shorter and cooler, this month serves as a graceful bridge between the vibrant summer and the gentle embrace of autumn, showcasing nature’s stunning transformation.

Monthly Sunshine Duration in Westmalle: September Highlighted

The September sunshine duration represents the total number of hours Westmalle 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.
JanFebMarAprMayJunJulAugSepOctNovDec119h199h269h341h392h390h403h377h315h235h186h134h
Data source: Westmalle September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Westmalle During September

In Westmalle, Belgium, the likelihood of sunny weather in September stands at 32%, placing it slightly above the summer months of July and August, which hover around 34% and 31%, respectively. As the year progresses, September marks a subtle transition into autumn, showcasing a dip in sunny chances compared to the peak months of April at 45%. This month serves as a reminder of the fleeting warmth before the cooler October air settles in, where the likelihood of sunny days decreases to 30%. As sunlight wanes in the lead-up to winter, September offers a delightful blend of lingering summer warmth and the early hints of autumn, making it a charming time to enjoy the outdoors in Westmalle.

Percentage of Sunny Days in September in Westmalle

The chart illustrates the percentage of sunny days in Westmalle 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 Westmalle experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec11%31%39%45%31%35%34%31%32%30%24%17%
Data source: Westmalle September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Westmalle in September

As summer fades, September in Westmalle, Belgium ushers in a gentle transition, marked by a daylight duration of 12 hours. This month sits comfortably between the long days of summer, where sunlight extends to 16 hours in June and July, and the shorter hours of autumn that follow in October, which offers just 10 hours. The gradual decline in daylight from the peak of 16 hours in July begins to invite earlier sunsets, preparing the town for the cozy embrace of fall. In September, residents enjoy a balance of light, as the vibrant colors of the season start to emerge, appealing to both nature enthusiasts and those who relish in the cooler, crisp air.

Average Daylight Hours in Westmalle for September

The chart illustrates the variation in daylight duration in Westmalle throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 25m9h 59m11h 55m13h 53m15h 36m16h 30m16h 1m14h 29m12h 34m10h 37m8h 51m7h 55m
Data source: Westmalle daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Westmalle

As September rolls into Westmalle, Belgium, the average wind speed dips slightly to 2.9 m/s (6 mph), marking a gentle transition into the autumn months. This decline continues a trend observed since the peak summer months, where wind speeds consistently hovered around 3.2 to 3.3 m/s in July and August. Compared to the breezier autumn and winter months approaching, September offers a softer caress of wind, inviting outdoor enthusiasts to enjoy the tail end of warm days. With October set to rise back to 4.0 m/s (9 mph), the charming lull of early fall provides a perfect backdrop for savoring the vibrant changes in the landscape while embracing the calm before the seasonal gusts return.

Average September Wind Speed in Westmalle

The chart displays monthly wind speed patterns in Westmalle, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.14.23.83.44.02.83.23.32.9 m/s4.03.13.8
Data source: Westmalle September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Westmalle Compares to Other Months

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

September and January present notably contrasting weather conditions. In September, temperatures can soar to a maximum of 33°C (92°F), with an average of 16°C (60°F), while January sees much cooler temperatures, peaking at only 14°C (58°F) and averaging just 4°C (40°F). Precipitation is relatively similar, with September experiencing 56 mm (2.2 in) over 10 days compared to January's 65 mm (2.5 in) across 12 days. Additionally, humidity is higher in January at 91%, versus September’s 82%, contributing to a colder, more damp atmosphere. For a closer look at January weather, visit Westmalle weather in January.

September and February showcase stark contrasts in weather conditions. In September, temperatures range from a minimum of 3°C (39°F) to a warm maximum of 33°C (92°F), with an average of 16°C (60°F). The month typically experiences 56 mm (2.2 in) of precipitation over about 10 days, accompanied by a humidity level of 82%. In contrast, February presents a cooler climate, with temperatures dipping to a minimum of -11°C (13°F) and averaging just 5°C (42°F), reaching a maximum of 19°C (66°F). This winter month sees a slightly higher precipitation level of 72 mm (2.8 in) across 12 days and elevated humidity at 89%. For more detailed information, you can check Westmalle weather in February.

September and March present significantly different weather characteristics. In September, temperatures range from a cool 3°C (39°F) at night to a warm 33°C (92°F) during the day, averaging around 16°C (60°F). The month experiences relatively high humidity at 82% and sees about 56 mm (2.2 in) of precipitation over roughly 10 days. Conversely, March starts off much colder, with temperatures dipping to a minimum of -7°C (20°F) and peaking at 23°C (73°F), averaging just 7°C (45°F). This month also has higher average precipitation at 72 mm (2.8 in) across about 14 days and slightly higher humidity at 87%. For more detailed information, please check Westmalle weather in March.

When comparing the weather in September and April, notable differences emerge. September tends to be warmer, with average temperatures reaching 16°C (60°F) and maximums hitting 33°C (92°F), while April’s average is cooler at 10°C (51°F), with maximums around 28°C (83°F). Precipitation in September is slightly higher, totaling 56 mm (2.2 in) over about 10 days, compared to April's 38 mm (1.5 in) during 8 days. Humidity levels remain relatively high in both months, with September at 82% and April at 85%. For those interested in more details about April weather, check out Westmalle weather in April.

In September, temperatures range from a minimum of 3°C (39°F) to a maximum of 33°C (92°F), with an average of 16°C (60°F), while May exhibits slightly cooler conditions with temperatures from 1°C (34°F) to a maximum of 32°C (89°F) and an average of 14°C (57°F). Both months see a high level of humidity at 82%, but May tends to experience more precipitation, averaging 65 mm (2.6 in) over 13 days compared to September’s 56 mm (2.2 in) over 10 days. For a deeper dive into the weather conditions during May, you can explore Westmalle weather in May.

When comparing the weather in September to that of June, some distinct differences emerge. September typically sees a wider temperature range, with a minimum of 3°C (39°F) and an average temperature of 16°C (60°F), while June starts at a higher minimum of 8°C (46°F) and boasts an average of 19°C (66°F). Both months can reach a peak of 33°C (92°F), but June tends to be more consistently warm. Precipitation levels are slightly higher in June, with 66 mm (2.6 in) over 11 days compared to September's 56 mm (2.2 in) across 10 days. Interestingly, both months experience the same humidity level of 82%. For more detailed insights, you can check the specific conditions here: Westmalle weather in June.

September weather presents a noticeable shift compared to July, with cooler temperatures and increased chances of rain. While July boasts a higher average temperature of 19°C (67°F), September's averages drop to 16°C (60°F), with a minimum of 3°C (39°F) and a maximum reaching 33°C (92°F). Additionally, July experiences slightly more precipitation, totaling 77 mm (3.0 in) over 12 days, compared to September's 56 mm (2.2 in) spread across 10 days. Humidity levels are comparable, with September at 82% and July at 80%, reflecting the lingering warmth of summer. For a detailed look at July weather, you can visit Westmalle weather in July.

In comparing the weather between September and August, we see a notable shift in temperatures and precipitation patterns. September features a wider temperature range, with minimums dropping to 3°C (39°F) compared to August's 8°C (47°F), while the average temperature decreases from 19°C (66°F) in August to 16°C (60°F) in September. Additionally, September experiences a maximum temperature of 33°C (92°F), slightly lower than August's peak of 35°C (96°F). Precipitation is also higher in August at 78 mm (3.1 in) over 14 days, while September sees 56 mm (2.2 in) across 10 days. Humidity levels rise slightly from August's 76% to September's 82%, adding a touch of mugginess as the season transitions. For more details on August conditions, you can check Westmalle weather in August.

In September, temperatures range from a mild 3°C (39°F) to a warm 33°C (92°F), with an average of 16°C (60°F) and relatively low precipitation at 56 mm (2.2 in) over about 10 days. In contrast, October sees cooler temperatures, with a minimum of 2°C (36°F), an average of 12°C (55°F), and a maximum of 26°C (79°F). Precipitation increases to 84 mm (3.3 in) spread over 13 days, and humidity rises to 89%. This shift marks a transition from the warmth of September to the cooler, wetter conditions typical of October. For more detailed information, check out Westmalle weather in October.

September and November present contrasting weather conditions. In September, temperatures range from a mild 3°C (39°F) at night to a warm 33°C (92°F) during the day, with an average of 16°C (60°F). Humidity is relatively high at 82%, and the month experiences about 56 mm of precipitation over 10 days. In contrast, November brings cooler temperatures, with nighttime lows dipping to -2°C (28°F) and daytime highs reaching only 19°C (66°F), resulting in an average temperature of 7°C (46°F). The humidity increases to 92%, and precipitation slightly rises to 57 mm over 12 days. For more specific weather conditions in November, you can check Westmalle weather in November.

September and December weather displays striking contrasts. In September, temperatures can range from a chilly 3°C (39°F) at night to a warm 33°C (92°F) during the day, with an average around 16°C (60°F). The month sees about 56 mm (2.2 in) of precipitation spread over 10 days, accompanied by a humidity level of 82%. In contrast, December ushers in significantly colder temperatures, with lows dipping to -5°C (24°F) and highs reaching only up to 15°C (59°F), resulting in an average of 6°C (42°F). This month experiences more precipitation, totaling 93 mm (3.7 in) across 16 days, and humidity rises slightly to 92%. For a detailed look at Westmalle weather specifically in December, visit Westmalle weather in December.

Compare Westmalle's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Westmalle

As September rolls in, Westmalle experiences a transition that marks the end of summer and the onset of autumn. The month is characterized by mild temperatures, where the warmth of the day can reach up to 33°C but cools significantly at night, offering a refreshing contrast. Unlike the hotter summer months, the humidity peaks around 82%, making it feel a bit more pronounced. Additionally, expect occasional rainfall with about 10 days of precipitation, which adds to the month’s character. This blend of warm days and cooler nights is what makes September truly unique in the Westmalle climate palette. For more detailed insights, check out Westmalle Climate.