September Weather in Loule, Portugal

Last updated: February 24, 2025

Loulé, Portugal, bathes in the warm embrace of September, showcasing maximum temperatures soaring to 36°C (97°F) while maintaining a comfortable average of 23°C (74°F). The month offers a pleasant respite with minimum temperatures dipping to 11°C (52°F). Rainfall is minimal, with only 15 mm (0.6 in) recorded over just 2 days, ensuring plenty of sunshine for outdoor activities. Despite a relatively high humidity level of 71%, the weather remains inviting, making September an ideal time to explore the vibrant charm of this Algarve gem.

September Temperature in Loule

In Loule, Portugal, September marks a delightful transition as summer gracefully gives way to autumn. With temperatures ranging from a comfortable minimum of 11°C (52°F) to a balmy maximum of 36°C (97°F), the month offers a splendid average of 23°C (74°F). This pattern showcases a gradual cooling trend compared to the intense heat of August, where highs frequently reached blistering 43°C (109°F). The pleasant evenings invite outdoor activities, while daytime warmth still allows for sun-soaked relaxation. As the season shifts, one can truly enjoy the best of both worlds: warm days perfect for swimming and cooler nights ideal for cozying up.

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

The chart illustrates September temperature patterns in Loule, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec495355596670767873665753
Data source: Temperature data for Loule 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 Loule

September in Loulé, Portugal, marks a subtle transition in precipitation patterns as summer draws to a close. With a total rainfall of 15 mm (0.6 in) over just 2 days, September experiences a notable uptick from the arid months of July and August, which recorded minimal rain. This slight increase heralds the approach of autumn, balancing the typically dry summer months and paving the way for the wetter fall season ahead. Interestingly, as September unfolds, the region prepares for more frequent precipitation, contrasting starkly with the earlier months of the year that saw much higher totals in rainfall spread over more days. This gradual shift not only revitalizes the landscape but also hints at the seasonal changes that lie ahead.

September Precipitation Trends in Loule

The chart displays monthly precipitation patterns in Loule, 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.
JanFebMarAprMayJunJulAugSepOctNovDec234879712583115325645
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Loule

In September, Loule, Portugal experiences a gentle transition in humidity, with levels at 71%. This slight rise from the drier summer months, where August recorded 68%, signals the onset of autumn. Interestingly, September's humidity is a blend of the summer warmth and the approaching cooler temperatures of fall, creating a comfortable atmosphere for both residents and visitors. As the season progresses, humidity levels are expected to increase further, reaching 75% in October and peaking again in the winter months. Overall, September serves as a perfect bridge, capturing the essence of late summer while hinting at the sultry evenings of autumn ahead.

September Average Humidity in Loule

This chart illustrates the average monthly humidity levels in Loule, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec80%74%71%69%69%67%69%68%71%75%78%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Loule

September in Loule, Portugal, signals a transition as the summer heat begins to wane but still offers a very high UV Index of 9. With a burn time of just 15 minutes, it’s crucial for outdoor enthusiasts to remain vigilant against sun exposure, reinforcing the importance of sunscreen and protective clothing. This trend follows a summer season marked by extreme to very high UV levels, with June peaking at an index of 11. As fall approaches, the UV Index slightly declines, yet remains a reminder that the sun’s strength can still pose risks. As you explore the beautiful landscapes of Loule this month, don't forget to monitor the UV Index for safe outdoor experiences. For more insights, check out Loule UV Index.

Maximum UV Index Levels in Loule for September

The chart shows the monthly maximum UV Index (UVI) for Loule 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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109743
Data source: Loule 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 Loule

September in Loule, Portugal, shines with 351 hours of sunlight, making it a splendid transition from the vibrant summer months. As the sunny days of July and August recede, bringing 427 and 398 hours respectively, September still holds onto the warmth with a generous amount of daylight. This month reflects a gradual decline in sunshine hours as the Algarve moves toward the cooler season. Yet, compared to the less sunny months of October and November, which offer 323 and 248 hours respectively, September remains a bright gem in the annual calendar. With its ample sunshine, it's the perfect time to explore the stunning landscapes and vibrant culture of Loule before the autumn chill sets in.

Monthly Sunshine Duration in Loule: September Highlighted

The September sunshine duration represents the total number of hours Loule 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.
JanFebMarAprMayJunJulAugSepOctNovDec203h248h308h359h410h413h427h398h351h323h248h243h
Data source: Loule September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Loule During September

As summer transitions to autumn, Loule, Portugal continues to bask in favorable weather, with a 67% chance of sunny days in September. This month marks a slight dip from the highs of July and August, which boast sun probabilities of 93% and 87%, respectively. However, compared to the cooler months, September remains a bright spot, outshining earlier months like April and January, which struggle with sun chances as low as 34% and 45%. With plenty of sunshine lingering in the air, September presents an ideal opportunity to enjoy outdoor activities before the skies begin to cloud over in October, when the likelihood of sunny weather drops to 58%.

Percentage of Sunny Days in September in Loule

The chart illustrates the percentage of sunny days in Loule 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 Loule experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec45%24%59%34%64%81%93%87%67%58%74%47%
Data source: Loule September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Loule in September

As September arrives in Loule, Portugal, the days begin to shorten, marking a gentle transition from the long, sun-soaked summers. With 12 hours of daylight, this month sees a slight decline from the peak summer months of June and July, which bask in a full 14 hours of sunlight. This gradual tapering of daylight hours, from an invigorating 14 hours in May through to a cozy 10 hours by November, paints a vivid picture of nature's cyclical rhythm. The increase from 9 hours in January to a blissful 14 hours mid-year reflects the region's alluring appeal, while September's softer light invites a sense of tranquility, heralding the arrival of autumn.

Average Daylight Hours in Loule for September

The chart illustrates the variation in daylight duration in Loule throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 55m10h 49m11h 58m13h 9m14h 9m14h 39m14h 23m13h 30m12h 22m11h 11m10h 9m9h 38m
Data source: Loule daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Loule

As summer transitions to autumn, September in Loule, Portugal features a gentle breeze with an average wind speed of 3.2 m/s (7 mph), marking a slight decrease compared to the bustling winds of July and August. This calming shift in winds continues the trend of milder weather, as September typically boasts the lowest average wind speed of the year. The winds in September are not only refreshing but also signify the onset of the fall season, contributing to the region's serene ambiance. Interestingly, this dip contrasts with the more vigorous gusts experienced earlier in the summer, emphasizing a gradual easing as the days shorten and the temperatures begin to cool. Overall, September embodies a tranquil transition, beckoning a peaceful coexistence of sun and breeze.

Average September Wind Speed in Loule

The chart displays monthly wind speed patterns in Loule, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.74.03.43.44.13.64.33.73.2 m/s3.33.44.2
Data source: Loule September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Loule Compares to Other Months

The weather in Loule 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 Loule and find detailed weather information for every month.

September weather typically features warmer temperatures, with minimums around 11°C (52°F) and maximums reaching up to 36°C (97°F), resulting in an average of 23°C (74°F). The month experiences minimal precipitation, averaging just 15 mm (0.6 in) over two days, and has a moderate humidity level of 71%. In contrast, January brings much cooler conditions, with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 20°C (68°F), and an average of 10°C (49°F). Although January sees slightly higher precipitation, at 23 mm (0.9 in) over three days, the humidity is notably higher at 80%. For more details on January weather, check out Loule weather in January.

September and February present contrasting weather patterns. In September, temperatures range from a minimum of 11°C (52°F) to a scorching maximum of 36°C (97°F), with an average of 23°C (74°F). Precipitation is relatively low at 15 mm (0.6 in) over just 2 days, and humidity sits at 71%. In contrast, February experiences much cooler conditions, with temperatures ranging from 0°C (32°F) to a maximum of 23°C (74°F) and an average of 12°C (54°F). This month sees higher rainfall totaling 48 mm (1.9 in) spread over 5 days, and humidity levels rise slightly to 73%. For a detailed look at February weather specifics, visit Loule weather in February.

In September, the weather tends to be warm and dry, with temperatures ranging from a mild 11°C (52°F) at night to a sweltering maximum of 36°C (97°F) during the day, and only 15 mm (0.6 in) of precipitation over just 2 days. In contrast, March presents a cooler climate, characterized by a minimum temperature of 2°C (36°F) and an average of 13°C (56°F), with highs reaching 26°C (79°F). This month also experiences significantly more rainfall, with 79 mm (3.1 in) spread over 10 days, but maintains the same humidity level of 71%. For more detailed insights on March weather, you can explore Loule weather in March.

In September, the weather tends to be warmer and drier, with average temperatures around 23°C (74°F) and maximums reaching as high as 36°C (97°F). The month experiences only a couple of rainy days, contributing to a total precipitation of just 15 mm (0.6 in) and relatively high humidity at 71%. In contrast, April brings cooler temperatures, with an average of 15°C (59°F) and a maximum of 29°C (84°F). This month is much wetter, receiving 71 mm (2.8 in) of rain over 11 days, while humidity stays slightly lower at 69%. For a more detailed look at April weather, check out Loule weather in April.

When comparing the weather of September and May, September boasts warmer temperatures overall, with an average of 23°C (74°F) and maximums reaching up to 36°C (97°F). In contrast, May features cooler conditions, with an average of 19°C (67°F) and maximums of 33°C (92°F). September also has less precipitation, averaging only 15 mm (0.6 in) over just 2 days, compared to May's 25 mm (1.0 in) across 4 days. The humidity is slightly higher in September at 71%, while May's humidity is around 69%. For a closer look at May's climate, you can visit Loule weather in May.

In September, the weather features a minimum temperature of 11°C (52°F) and an average of 23°C (74°F), with a peak reaching up to 36°C (97°F), while June sees slightly lower average temperatures with a minimum of 10°C (51°F) and an average of 21°C (71°F), though maximum temperatures can soar to 39°C (103°F). Both months experience limited rainfall, with September receiving 15 mm (0.6 in) and June only 8 mm (0.3 in), each typically having two days of precipitation. Humidity levels are slightly higher in September at 71%, compared to June's 67%. For more detailed weather information, check out Loule weather in June.

In comparing the weather of September and July, September tends to be slightly cooler with a minimum temperature of 11°C (52°F) compared to July’s 13°C (55°F). The average temperature in September is also a touch lower at 23°C (74°F), whereas July averages 24°C (76°F). July features higher maximum temperatures, reaching up to 39°C (103°F), while September peaks at 36°C (97°F). Precipitation is minimal in both months, with September experiencing 15 mm (0.6 in) over 2 days, compared to July's dry conditions with only 3 mm (0.1 in) and no rainy days at all. Humidity levels are quite similar, with September at 71% and July slightly lower at 69%. For more detailed insights, check out this link: Loule weather in July.

In comparing the weather between August and September, we see notable differences in temperature and precipitation patterns. August tends to be hotter, with a maximum temperature reaching up to 43°C (109°F) and an average of 25°C (78°F), while September features a milder maximum of 36°C (97°F) and an average of 23°C (74°F). Additionally, August experiences almost no precipitation, recording just 1 mm over the month, whereas September sees slightly more rain, totaling 15 mm across 2 days. Humidity levels remain relatively similar, with August at 68% and September slightly higher at 71%. For further details, you can check Loule weather in August.

In September, the weather is typically warmer with average temperatures reaching 23°C (74°F) and maximum highs peaking at 36°C (97°F). The month experiences relatively low precipitation, with only 15 mm (0.6 in) over just 2 days, and humidity levels around 71%. In contrast, October brings a noticeable drop in temperatures, with a minimum of 5°C (42°F) and a cooler average of 19°C (66°F). Rainfall increases to 32 mm (1.3 in) over 3 days, accompanied by slightly higher humidity at 75%. For more detailed insights into conditions during this month, check out Loule weather in October.

September and November exhibit a notable contrast in weather patterns. September is characterized by warmer temperatures, with an average of 23°C (74°F) and highs reaching up to 36°C (97°F), paired with relatively low precipitation of 15 mm (0.6 in) over just 2 days. In contrast, November sees much cooler temperatures, averaging 14°C (57°F), with highs around 24°C (75°F) and a significant increase in rainfall to 56 mm (2.2 in) spread over 7 days. The humidity also rises slightly from September at 71% to 78% in November, contributing to a different overall climate experience. For more details on the November weather in this region, you can check Loule weather in November.

September and December present a striking contrast in weather patterns. September boasts warmer temperatures, with a minimum of 11°C (52°F) and an average high reaching up to 36°C (97°F). It experiences relatively low precipitation, with only 15 mm (0.6 in) falling over just 2 days, along with a humidity level of 71%. In contrast, December cools down considerably, featuring a minimum temperature of 0°C (32°F) and an average high of 21°C (70°F). This month also sees increased precipitation, totaling 45 mm (1.8 in) over 6 days, and a higher humidity at 81%. For more insights into December's climate, you can check Loule weather in December.

Compare Loule's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Loule

As September unfolds in Loule, it offers a delightful transition from the heat of summer to the mildness of autumn. With maximum temperatures still soaring, this month generally maintains a comfortable average warmth, while the nights gradually cool down, providing a refreshing respite. Rainfall is minimal, with only a couple of days registering light precipitation, making it a great time for outdoor activities. The humidity lingers at a moderate level, contributing to the region's lush surroundings. Overall, September's weather sets the perfect stage for exploring the beauty of Loule before the cooler months set in. For more detailed insights, visit Loule Climate.