September Weather in Sint-Truiden, Belgium

Last updated: August 21, 2025

September in Sint-Truiden, Belgium offers a delightful mix of late summer warmth and crisp autumnal beginnings. With maximum temperatures reaching a sizzling 34°C (93°F), the month presents an average of 15°C (60°F), while the thermometers can dip as low as 3°C (37°F) at night. The air holds a notable 81% humidity, adding a touch of moisture to the early autumn atmosphere. Rainfall is relatively moderate, with 64 mm (2.5 in) of precipitation spread over 9 days, ensuring the landscape remains lush and vibrant. This transitional month invites both warmth and refreshing showers, making it a unique time to experience the charm of Sint-Truiden.

September Temperature in Sint-Truiden

In September, Sint-Truiden, Belgium, transitions into the comforting embrace of autumn, where temperatures invite a refreshing change. With a minimum of 3°C (37°F) and an average of 15°C (60°F), the early signs of crispness in the air are palpable. The maximum temperatures can still reach an impressive 34°C (93°F), offering a lingering taste of summer’s warmth. This month marks a delightful shift, showcasing a moderate climate that balances warm days with cool nights, making it an ideal time for outdoor activities and enjoying the picturesque fall scenery. As nature begins to transition, so too does the weather, creating a vibrant backdrop against which the charm of Sint-Truiden can truly flourish.

September Weather in Sint-Truiden: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sint-Truiden, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sint-Truiden, 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).
JanFebMarAprMayJunJulAugSepOctNovDec384145505665666659544541
Data source: Temperature data for Sint-Truiden 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 Sint-Truiden

September in Sint-Truiden sees a noteworthy shift in precipitation as the summer warmth begins to fade. With an average rainfall of 64 mm (approximately 2.5 inches) over 9 days, September's precipitation levels mirror those of May, indicating a transition into the wetter months ahead. This is a moderate decrease from the heavier downpours of August, which recorded 89 mm across 14 days. As autumn sets in and October looms, the precipitation is expected to rise again, reflecting a pattern of increasing rain as the year progresses, with October averaging 87 mm over 13 days. The pattern suggests that while September holds onto some remnants of summer, it also signals the onset of a more humid season.

September Precipitation Trends in Sint-Truiden

The chart displays monthly precipitation patterns in Sint-Truiden, 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 Sint-Truiden, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec6774763864848189648757103
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sint-Truiden

September in Sint-Truiden, Belgium, marks a transitional period in humidity levels, with an average of 81%. This figure reflects a subtle rise from the drier summer months, where humidity dipped to its annual low of 71% in August. As autumn approaches, the shift signifies a return to the more moisture-rich conditions characteristic of the earlier months of the year, with humidity peaking at 91% in January and November. The gradual increase observed in September hints at the onset of the wetter fall season, creating a contrast to the previous summer's drier atmosphere. This dynamic interplay of humidity levels throughout the year showcases Sint-Truiden's shifting climates, blending seasonal changes with the charm of the Belgian landscape.

September Average Humidity in Sint-Truiden

This chart illustrates the average monthly humidity levels in Sint-Truiden, 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 Sint-Truiden is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%87%84%77%74%72%71%81%88%91%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sint-Truiden

As September rolls in, Sint-Truiden experiences a moderate UV Index of 5, signaling a shift from the intense summer months. Following the peak of high to very high UV levels in July and August, when sunburn risk was heightened, the sun's intensity begins to ease. With a recommended burn time of 30 minutes, it's crucial to stay mindful of sun protection, especially during midday hours. This transitional month prepares us for a gradual decline in UV exposure as we head toward autumn. For those planning outdoor activities, understanding the UV trends can help ensure a safe and enjoyable experience. For more details, visit Sint-Truiden UV Index.

Maximum UV Index Levels in Sint-Truiden for September

The chart shows the monthly maximum UV Index (UVI) for Sint-Truiden 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 Sint-Truiden typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Sint-Truiden 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 Sint-Truiden

As September unfolds in Sint-Truiden, Belgium, the transition to autumn brings with it a delightful glow of sunshine, with 317 hours illuminating the month. This marks a notable decline from the peak of summer in July and August, where 404 and 378 hours of sun basked the region. However, September still offers a generous dose of sunlight, maintaining a vibrant atmosphere as the days gradually shorten. The consistent increase in sunshine from the early months of the year—starting with a mere 120 hours in January—culminates in this warm September, hinting at the rich tapestry of seasonal change that defines the climate of Sint-Truiden. As the year progresses and yields to the chill of October, where 240 hours of sunlight are anticipated, September stands as a poignant reminder of the sun-kissed warmth still lingering in the air.

Monthly Sunshine Duration in Sint-Truiden: September Highlighted

The September sunshine duration represents the total number of hours Sint-Truiden 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.
JanFebMarAprMayJunJulAugSepOctNovDec120h202h268h342h393h393h404h378h317h240h188h134h
Data source: Sint-Truiden September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sint-Truiden During September

In Sint-Truiden, Belgium, September sees a 37% chance of sunny weather, marking a slight uptick from the summer months. This rise contrasts with the drizzle of winter, which looms just around the corner, where chances drop significantly, particularly in January and December. Notably, the chances of sunshine in September are higher than in many other months from November through March, indicating it as a prime time to bask in some late summer warmth. After a fluctuating summer pattern, where sunshine probabilities hover in the low 30s, September offers a refreshing blend of mild weather and improved daylight, making it an ideal period for outdoor activities as the vibrant landscapes transition into autumn hues.

Percentage of Sunny Days in September in Sint-Truiden

The chart illustrates the percentage of sunny days in Sint-Truiden 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 Sint-Truiden experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec9%32%39%47%32%32%33%30%37%30%26%15%
Data source: Sint-Truiden September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sint-Truiden in September

As summer gracefully fades into fall, September in Sint-Truiden, Belgium offers a delightful balance with approximately 12 hours of daylight. This marked reduction from the peak of 16 hours in June reflects the gradual transition towards shorter days as the year winds down. Following the vibrant energy of spring and summer, where daylight stretches to its fullest, September strikes a chord of moderation, bridging the gap between the long summer days and the impending embrace of autumn. With each passing month, daylight fluctuates, but September remains a reminder of nature's rhythmic cycle, blending warmth with the cool hint of upcoming change.

Average Daylight Hours in Sint-Truiden for September

The chart illustrates the variation in daylight duration in Sint-Truiden throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 30m10h 1m11h 55m13h 51m15h 31m16h 24m15h 56m14h 26m12h 34m10h 39m8h 56m8h 1m
Data source: Sint-Truiden daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Sint-Truiden

As September unfolds in Sint-Truiden, Belgium, the gentle breeze of autumn starts to take hold, with an average wind speed of 2.8 m/s (6 mph). This marks a notable decline from the more spirited gusts of earlier months, particularly the robust winds of January and February, which both hover around 4.4 m/s (10 mph). While the spring brought a refreshing 4.3 m/s in May, summer months settled into a much calmer rhythm at around 3.3 m/s. The transition into fall signals a shift towards more tranquil weather, making September a delightful time to enjoy the fading warmth and vibrant colors of the season. As we look ahead, October promises a revival with wind speeds returning to a brisk 4.3 m/s, bridging the serenity of September with the compelling chill of fall.

Average September Wind Speed in Sint-Truiden

The chart displays monthly wind speed patterns in Sint-Truiden, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.54.03.24.32.73.33.32.8 m/s4.33.34.1
Data source: Sint-Truiden September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Sint-Truiden Compares to Other Months

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

In September, the weather exhibits a wide temperature range, with minimums around 3°C (37°F), averages at a pleasant 15°C (60°F), and maximums soaring to 34°C (93°F). This month experiences an average of 9 days of rainfall, contributing to a humidity level of 81%. In contrast, January brings a much colder climate, with temperatures dipping as low as -8°C (18°F), averaging just 4°C (39°F), and peaking at 13°C (56°F). Precipitation is slightly higher in January at 67 mm (2.7 in), spread over around 12 days, along with increased humidity at 91%. For a more detailed look at January in this region, check out Sint-Truiden weather in January.

September and February present starkly different weather conditions. In September, temperatures range from a cool 3°C (37°F) at night to a warm 34°C (93°F) during the day, with an average of 15°C (60°F). The month experiences around 64 mm (2.5 in) of precipitation over 9 days and carries a humidity level of 81%. In contrast, February brings colder temperatures, with a minimum of -9°C (17°F) and a maximum of 20°C (68°F), averaging just 5°C (41°F). It sees slightly more precipitation at 74 mm (2.9 in) spread across 12 days, and a higher humidity of 90%. For more detailed insights, you can visit Sint-Truiden weather in February.

September and March present contrasting weather patterns, each with unique characteristics. In September, temperatures range from a cool 3°C (37°F) to a warm 34°C (93°F), with an average of 15°C (60°F), while March sees much colder temperatures, fluctuating between -9°C (16°F) and a maximum of 23°C (74°F), averaging at 7°C (45°F). Additionally, September experiences less precipitation, with 64 mm (2.5 in) over 9 days, compared to March's 76 mm (3.0 in) spread over 15 days, highlighting how March tends to be wetter. Humidity levels are also relatively high in both months, with September at 81% and March slightly higher at 87%. For more detailed insights, you can visit Sint-Truiden weather in March.

When comparing the weather in September and April, notable differences emerge in temperature and precipitation. September typically enjoys warmer temperatures, ranging from a minimum of 3°C (37°F) to a maximum of 34°C (93°F), with an average of 15°C (60°F). In contrast, April tends to be cooler, with temperatures starting at a minimum of -4°C (26°F) and peaking at 28°C (82°F), averaging around 10°C (50°F). Precipitation levels in September are higher at 64 mm (2.5 in) over 9 days, while April sees less rain at 38 mm (1.5 in) across 8 days. Both months feature high humidity, with September at 81% and April slightly higher at 84%. For more detailed insights into April weather, you can check Sint-Truiden weather in April.

When comparing the weather in September and May, there are some notable differences. September generally features a broader temperature range with minima reaching 3°C (37°F) and maxima soaring up to 34°C (93°F), making it warmer overall with an average temperature of 15°C (60°F). In contrast, May has slightly cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 31°C (88°F), resulting in an average of 14°C (57°F). Both months receive an equal amount of precipitation, averaging 64 mm (2.5 in), but September experiences fewer rainy days, totaling 9 compared to May's 14 days of rain. Additionally, September tends to be a bit more humid at 81%, while May has a humidity level of 77%. For more details about the weather in May, you can visit Sint-Truiden weather in May.

In comparing the weather of September and June, we see notable differences in temperature and precipitation patterns. September experiences a wider temperature range, with minimum temperatures dropping to 3°C (37°F) and maximums soaring up to 34°C (93°F), averaging around 15°C (60°F). In contrast, June starts off warmer, with minimums of 7°C (46°F) and an average of 18°C (65°F), reaching a maximum of 33°C (92°F). Precipitation is also a factor; while September sees about 64 mm (2.5 in) of rainfall over 9 days, June encounters slightly more at 84 mm (3.3 in) across 12 days. Humidity levels vary as well, with September’s humidity at 81% compared to June’s 74%. For more detailed insights about June weather, you can visit Sint-Truiden weather in June.

When comparing the weather between September and July, it’s evident that July tends to be warmer overall, with average temperatures reaching 19°C (66°F) and maximums peaking at 40°C (104°F). In contrast, September shows a wider temperature range, with a minimum of 3°C (37°F) and a maximum of 34°C (93°F), averaging around 15°C (60°F). July also experiences slightly more precipitation, totaling 81 mm (3.2 in) over 10 days, compared to September's 64 mm (2.5 in) over 9 days. Humidity levels in September are higher at 81%, while July maintains a lower humidity of 72%. For more details specific to July weather, you can visit Sint-Truiden weather in July.

In comparing the weather of September with that of August, September experiences cooler temperatures overall, with a minimum of 3°C (37°F) and an average high of 34°C (93°F), compared to August's minimum of 7°C (45°F) and a maximum of 36°C (97°F). While September has lower average temperatures, it also sees a slight decrease in humidity at 81% compared to August's 71%. Precipitation is also less frequent in September, with 64 mm (2.5 in) falling over 9 days, while August has higher rainfall at 89 mm (3.5 in) across 14 days. For more detailed information on August's weather, you can visit this link: Sint-Truiden weather in August.

In September, temperatures ranged from a minimum of 3°C (37°F) to a maximum of 34°C (93°F), with an average of 15°C (60°F). The month experienced 64 mm (2.5 in) of precipitation over 9 days, and the humidity averaged around 81%. In contrast, October sees a notable drop in temperatures, with minimums of 1°C (35°F) and a maximum of 25°C (78°F), resulting in an average temperature of 12°C (54°F). Rainfall increases to 87 mm (3.4 in) over 13 days, and humidity rises slightly to 88%. For more detailed information about October's climate, you can visit Sint-Truiden weather in October.

September and November present contrasting weather conditions. In September, temperatures are generally warmer, ranging from a minimum of 3°C (37°F) to a maximum of 34°C (93°F), with an average of 15°C (60°F). This month sees 64 mm (2.5 in) of precipitation over about 9 days, accompanied by a relatively high humidity of 81%. In contrast, November brings cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 19°C (66°F), averaging around 7°C (45°F). The month experiences slightly less precipitation at 57 mm (2.2 in) but over more days, totaling 11 days of rain, and the humidity rises to 91%. For more details on November weather, you can check Sint-Truiden weather in November.

September and December in Sint-Truiden present a striking contrast in weather conditions. In September, temperatures range from a mild 3°C (37°F) at night to a warm 34°C (93°F) during the day, with an average temperature of 15°C (60°F). This month also sees a moderate amount of rainfall at 64 mm (2.5 in) spread over about 9 days, accompanied by an 81% humidity level.

In contrast, December brings much colder temperatures, with nighttime lows dipping to -5°C (23°F) and daytime highs reaching only 15°C (59°F), resulting in a stark average of 5°C (42°F). Additionally, December is wetter, receiving 103 mm (4.1 in) of precipitation across approximately 18 days, and with humidity rising to 92%. For more detailed information on December weather in Sint-Truiden, you can visit Sint-Truiden weather in December.

Compare Sint-Truiden's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Sint-Truiden

As summer transitions into autumn, September in Sint-Truiden showcases a notable range in temperatures, with warm days reaching up to 34°C and cooler nights dropping to 3°C, reflecting a significant shift from the consistent heat of the preceding months. This month also experiences an average temperature of 15°C, providing a refreshing yet comfortable climate. With 81% humidity and 64 mm of rainfall over 9 days, the weather can be quite unpredictable, signaling the onset of the wetter season. For those keen on understanding how Sint-Truiden's climate adapts throughout the year, more insights can be found at Sint-Truiden Climate.