September Weather in Antwerpen, Belgium

Last updated: August 21, 2025

September in Antwerpen, Belgium, ushers in a diverse weather experience, characterized by a maximum temperature soaring to 33°C (92°F), while the average settles around a comfortable 16°C (60°F). Temperatures can dip as low as 4°C (39°F), illustrating the month's variability. Rainfall is moderately frequent, with an average precipitation of 56 mm (2.2 in) spread across 10 days, contributing to the region's lush greenery. Humidity levels hover at a relatively high 82%, adding a touch of warmth to the air. Embrace September's charm and prepare for a blend of warm days and refreshing showers in this vibrant Belgian city.

September Temperature in Antwerpen

In September, Antwerpen begins to transition from the warm embrace of summer to the cooler tones of autumn. With minimum temperatures around 4°C (39°F) and average highs peaking at 33°C (92°F), the month often features days that still feel like summer, allowing for pleasant outdoor activities. However, as the month progresses, temperatures gradually decrease, reflecting an overall trend of cooling as the city gears up for fall. The average temperature settles at a comfortable 16°C (60°F), creating a perfect backdrop for exploring this vibrant Belgian city, where the lingering warmth meets the crisp air of approaching autumn.

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

The chart illustrates September temperature patterns in Antwerpen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Antwerpen, 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).
JanFebMarAprMayJunJulAugSepOctNovDec404245505765666660554642
Data source: Temperature data for Antwerpen 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 Antwerpen

September in Antwerpen sees a moderate precipitation amount of 56 mm (2.2 in), which is a noticeable decrease from the heavier rains of the summer months. With 10 days of recorded rainfall, this month marks a transition as the vibrant hues of late summer begin to give way to autumn. This trend reflects a gradual decline in precipitation, as the city prepares for the wetter October, which typically receives 82 mm (3.2 in), just before entering the winter season. Overall, September strikes a balance, offering a brief respite from the summer deluge while hinting at the drizzles to come.

September Precipitation Trends in Antwerpen

The chart displays monthly precipitation patterns in Antwerpen, 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 Antwerpen, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec656970386366757656825692
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Antwerpen

September in Antwerpen heralds a transition in humidity levels as they stabilize at 82%, reflecting a consistent trend seen throughout the summer months. While August experiences the lowest humidity of the year at 76%, September’s figures indicate a return to the gradual rise that begins in the fall. As autumn approaches, the humidity levels creep upwards again, ultimately peaking in the winter months of November and December, both reaching 92%. This month serves as a bridge, where the warmth of summer meets the crispness of autumn, making for a season where the air feels pleasantly humid yet begins to cool, preparing the city for the wetter months ahead.

September Average Humidity in Antwerpen

This chart illustrates the average monthly humidity levels in Antwerpen, 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 Antwerpen 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 Antwerpen

As September unfolds in Antwerpen, Belgium, the UV Index begins to mellow, registering a moderate 5 this month. This marks a notable decrease from the very high readings of summer, when July and June both reached an index of 8. With this moderate exposure category, residents and visitors can expect a burn time of 30 minutes, allowing for enjoyable outdoor activities without excessive sun risk. While the sun’s intensity is less daunting than midsummer, it's still essential to remain mindful of UV exposure as the days transition into fall. For more details on sun protection, check out the complete Antwerpen UV Index.

Maximum UV Index Levels in Antwerpen for September

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

As September rolls in, Antwerp delights with a generous 320 hours of sunshine, offering a warm transition into autumn. This marked a slight decrease from the previous month’s peak but still reflects a vibrant late-summer ambiance in the city. Observing the yearly sunshine patterns, one can see a gradual upward trend from the cold winter months through to the sunny heights of summer, peaking in July with 411 hours. The sun begins to retreat as October approaches, but September's sun-dappled days are a reminder of summer's lingering embrace, where both locals and visitors can enjoy the charming streets and stunning architecture bathed in golden light.

Monthly Sunshine Duration in Antwerpen: September Highlighted

The September sunshine duration represents the total number of hours Antwerpen 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.
JanFebMarAprMayJunJulAugSepOctNovDec120h203h272h348h397h400h411h383h320h241h191h143h
Data source: Antwerpen September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Antwerpen During September

As September rolls into Antwerpen, the likelihood of sunny weather sits at 33%, making it a transitional month where summer's warmth begins to wane. While this figure shows a slight dip from the summer months of July and August, which hover around 34% and 32% respectively, it remains relatively stable compared to the earlier spring months. Interestingly, September's chances are still higher than the chillier months that follow, including October at 30% and November, which drops to 23%. This trend highlights a time when outdoor activities are still ripe for those embracing the lingering sunshine before autumn firmly sets in.

Percentage of Sunny Days in September in Antwerpen

The chart illustrates the percentage of sunny days in Antwerpen 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 Antwerpen experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec11%31%39%45%32%35%34%32%33%30%23%17%
Data source: Antwerpen September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Antwerpen in September

As September unfolds in Antwerpen, Belgium, the days begin to shorten, providing a gentle transition from the long, sunlit hours of summer. With approximately 12 hours of daylight, the month marks a significant decrease from the peak of 16 hours in June, yet still offers a comforting abundance compared to the darker months ahead. This trend highlights the gradual shift in seasons, where sunlight begins to dip, echoing the vibrant colors of autumn that start to emerge. Following the 14 hours in August, September serves as a bridge, reminding us of the natural rhythm of light and dark, ultimately leading into the cozier, more introspective months of fall.

Average Daylight Hours in Antwerpen for September

The chart illustrates the variation in daylight duration in Antwerpen throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 27m10h11h 55m13h 52m15h 34m16h 28m15h 59m14h 28m12h 34m10h 37m8h 53m7h 57m
Data source: Antwerpen daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Antwerpen

As September rolls into Antwerpen, the wind takes a gentle turn, averaging 3.0 m/s (7 mph). This slight dip from the summer months reflects a transition towards the cooler fall season, where the winds are noticeably calmer compared to the bustling summer breezes. With an average speed lower than both August and July, September offers a serene atmosphere, perfect for leisurely strolls along the riverside or exploring the city's vibrant streets. Interestingly, the winds pick up again in October, hinting at the seasonal shifts to come, but for now, Antwerp enjoys a peaceful, refreshing breeze that invites both locals and visitors to savor the charm of early autumn.

Average September Wind Speed in Antwerpen

The chart displays monthly wind speed patterns in Antwerpen, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.24.33.93.54.12.83.33.43.0 m/s4.23.23.9
Data source: Antwerpen September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Antwerpen Compares to Other Months

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

In September, the weather is generally warmer, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 33°C (92°F) and an average of 16°C (60°F). This month experiences moderate precipitation, totaling 56 mm (2.2 in) over about 10 days, with humidity around 82%. In contrast, January brings much colder temperatures, with a minimum of -6°C (21°F) and a maximum of 14°C (58°F), averaging at 4°C (40°F). It also sees slightly higher precipitation at 65 mm (2.5 in) over approximately 12 days, along with increased humidity at 91%. For more detailed information, check out Antwerpen weather in January.

September and February present contrasting weather conditions in terms of temperature and humidity. In September, temperatures can range from a cool 4°C (39°F) to a warm 33°C (92°F), averaging a comfortable 16°C (60°F), while February experiences much colder temperatures, with lows of -10°C (14°F) and highs reaching only 19°C (66°F), averaging just 5°C (42°F). Precipitation is slightly higher in February at 69 mm (2.7 in) over 12 days compared to September’s 56 mm (2.2 in) over 10 days, and humidity levels are notably elevated in February at 89%, compared to 82% in September. For more details on February weather, you can check Antwerpen weather in February.

September and March present contrasting weather conditions. In September, temperatures can range from a chilly 4°C (39°F) at night to a warm 33°C (92°F) during the day, averaging around 16°C (60°F) with 56 mm (2.2 in) of rainfall occurring over approximately 10 days. The humidity is relatively high at 82%, often making the heat feel more intense.

In contrast, March experiences cooler temperatures, with nighttime lows dropping to -7°C (20°F) and daytime highs peaking at 23°C (73°F), yielding an average temperature of 7°C (46°F). The month sees slightly more precipitation at 70 mm (2.8 in), spread over about 14 days, and the humidity remains high at 87%. For more detailed insights about the conditions during this month, check out Antwerpen weather in March.

September and April exhibit distinct differences in weather patterns. September typically sees a broader temperature range, with minimums around 4°C (39°F), averages reaching 16°C (60°F), and maximums soaring to 33°C (92°F), making it noticeably warmer overall. In contrast, April generally starts chilly, with minimum temperatures dipping to -3°C (27°F) and averages around 10°C (51°F), peaking at a milder 28°C (82°F). Rainfall also varies slightly, with September experiencing 56 mm (2.2 in) of precipitation over about 10 days, compared to April's 38 mm (1.5 in) across 9 days. Humidity levels are quite similar, hovering at 82% in September and 85% in April. For a deeper insight into April's weather specific to Antwerpen, check this link: Antwerpen weather in April.

When comparing the weather in September and May, we see some notable differences. September offers a wider temperature range, with minimums reaching 4°C (39°F) and maximums climbing to 33°C (92°F), resulting in an average of 16°C (60°F). In contrast, May has slightly cooler temperatures, with minimums at 1°C (35°F) and maximums at 31°C (88°F), averaging around 14°C (57°F).

Both months experience high humidity levels of 82%, but September has fewer days of precipitation, totaling about 10 days, compared to May's 13 days and slightly higher total precipitation of 63 mm (2.5 in). For more details on May weather, you can visit Antwerpen weather in May.

When comparing the weather in September and June, both months exhibit a range of temperatures, with September featuring a minimum of 4°C (39°F) and an average of 16°C (60°F), while June has slightly warmer temperatures, starting at a minimum of 8°C (46°F) and averaging 18°C (65°F). Both months share a maximum temperature of around 33°C (91-92°F), making them quite similar at the high end. However, September tends to be slightly drier, with 56 mm (2.2 in) of precipitation over 10 days compared to June's 66 mm (2.6 in) over 11 days. Humidity levels remain steady for both months at 82%. For more specific details about June in Antwerpen, you can check Antwerpen weather in June.

When comparing the weather in September and July, notable differences emerge in temperature and precipitation patterns. September experiences a broader temperature range, with minimums dropping to 4°C (39°F) and maximums reaching up to 33°C (92°F), while July tends to be warmer, with a minimum of 8°C (47°F) and a maximum soaring to 40°C (103°F). Precipitation levels are slightly higher in July, with an average of 75 mm (2.9 in) over 11 days, compared to September's 56 mm (2.2 in) over 10 days. Humidity levels are quite similar, with September at 82% and July slightly lower at 80%. For more detailed information on July weather, visit Antwerpen weather in July.

September presents a noticeable drop in temperatures compared to August, with minimums hitting 4°C (39°F) and maximums reaching 33°C (92°F), while August enjoys milder weather with minimums at 9°C (48°F) and maximums peaking at 35°C (95°F). Both months experience considerable humidity, but September's average humidity of 82% slightly surpasses August’s 76%. Precipitation also varies, as September receives 56 mm (2.2 in) over about 10 days, while August is wetter with 76 mm (3.0 in) across 13 days. For a detailed look at August's weather patterns, check Antwerpen weather in August.

In September, temperatures in Antwerp range from a minimum of 4°C (39°F) to a maximum of 33°C (92°F), with an average of 16°C (60°F). The month experiences about 56 mm (2.2 in) of precipitation over 10 days, and humidity levels are relatively high at 82%. In contrast, October sees a slight drop in temperatures, with minimums of 2°C (36°F), an average of 13°C (55°F), and maximums reaching 26°C (79°F). The precipitation in October increases to 82 mm (3.2 in) over 13 days, and humidity rises to 89%. For more details on the weather specific to October, you can visit Antwerpen weather in October.

In September, the weather is warm, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 33°C (92°F) and an average of 16°C (60°F). This month experiences pleasant conditions with a humidity level of 82% and about 56 mm (2.2 in) of precipitation over 10 days.

In contrast, November brings cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 19°C (66°F), averaging around 8°C (46°F). The humidity rises slightly to 92%, and precipitation remains consistent at 56 mm (2.2 in), though it occurs over 11 days, suggesting a trend toward wetter conditions. For more details on November weather, check out Antwerpen weather in November.

September and December exhibit stark differences in weather patterns. In September, temperatures range from a minimum of 4°C (39°F) to a maximum of 33°C (92°F), with an average of 16°C (60°F). The month sees about 56 mm (2.2 in) of precipitation over approximately 10 days and maintains a humidity level of 82%. In contrast, December is significantly colder, with temperatures ranging from -4°C (24°F) to a maximum of 15°C (59°F), averaging just 6°C (43°F). Precipitation increases to 92 mm (3.6 in) across 17 days, accompanied by higher humidity at 92%. For more details, you can visit Antwerpen weather in December.

Compare Antwerpen's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Antwerpen

As September unfolds in Antwerpen, the weather begins to transition towards cooler, more refreshing temperatures after the summer heat. With an average temperature that balances the warmth of summer and the crispness of autumn, this month often surprises with its pleasant days and cooler nights. While rainfall is frequent, contributing to an overall humidity of 82%, it remains far less than the predicted deluges of winter. For those looking to experience a more temperate climate, September offers a unique charm, making it an ideal time to explore the city's scenic beauty without the sweltering heat. Discover more about the season’s unique offerings in our detailed guide on Antwerpen Climate.