Last updated: February 24, 2025
September in Guimarães, Portugal offers a delightful blend of warm temperatures and occasional rain, creating a vibrant atmosphere perfect for exploration. With a maximum of 34°C (93°F) and an average of 19°C (67°F), visitors can expect pleasantly warm days, while cooler evenings can dip to a refreshing 6°C (43°F). The month sees about 49 mm (1.9 in) of precipitation over 6 days, contributing to the lush landscapes that characterize this historic city. Additionally, a relative humidity of 71% adds to the delightful Mediterranean feel, making September a suitable time for both cultural discovery and leisurely outdoor activities.
In September, Guimarães, Portugal begins to transition from the summer heat, offering a pleasant climate that encourages outdoor exploration. With average temperatures around 19°C (67°F), the month provides a comfortable blend of warmth and coolness, perfect for wandering the historic streets. Expect minimums around 6°C (43°F) and maximums peaking at 34°C (93°F), suggesting that while the summer’s intensity lingers, the cooler evenings signal the onset of autumn. This gradual shift in temperature reflects a more temperate climate, making September an ideal time for visitors to enjoy both the lingering warmth and the emerging charm of fall colors in this picturesque town.
September in Guimarães, Portugal, welcomes a mild transition into autumn with an average precipitation of 49 mm (1.9 in) spread over 6 days. This marks a slight uptick from the preceding summer months, where rainfall was minimal, showcasing a gradual shift as the region prepares for the wetter fall season. With noticeably more rain than August's 1.1 in, September’s weather hints at the impending October deluge, where precipitation typically swells to 151 mm (6.0 in). This month serves as a gentle reminder of nature's rhythm, bridging the dry heat of summer with the invigorating rains that characterize the autumn months.
As summer fades, September in Guimaraes, Portugal, welcomes a refreshing shift in humidity levels. With an average humidity of 71%, it's a comfortable reprieve compared to the peak dryness of 63% in July and 64% in August. This moderate moisture sets the stage for early autumn, providing a pleasant atmosphere before the humidity begins to rise again in the cooler months. Notably, the trend shows a gradual increase from summer's lows, foreshadowing the wetter conditions of October's 79% and the more humid months ahead. Overall, September strikes a delightful balance, making it an ideal time to explore the historical charm of this vibrant city.
As summer transitions into early autumn in Guimaraes, Portugal, the UV Index in September remains notably high at 8, categorizing it as very high exposure. This is consistent with the previous months of June, July, and August, where the UV levels peaked at 11 and 10, respectively. As such, the recommended burn time remains a brisk 15 minutes, echoing the protection needed during the peak summer months. This trend underscores the importance of continued sun safety practices even as the days begin to shorten. With October bringing a slight decrease to a UV Index of 6, it's crucial to remain vigilant and informed about sun exposure. For more detailed insights on Guimaraes' UV Index throughout the year, visit Guimaraes UV Index.
UV Risk Categories
September in Guimarães, Portugal, basks in 345 hours of radiant sunshine, making it a delightful time to explore this historic city. As summer fades, the sunny days of September still carry the warmth of the previous months, although they dip from the peak of 427 hours in July. This gradual decrease is part of a broader trend, where sunshine hours steadily climb from the coldest January at 153 hours and peak in the height of summer before starting a gentle descent into autumn. With September's bright days, visitors can enjoy pleasant weather, scenic landscapes, and the rich cultural heritage of Guimarães before the cooler October ushers in shorter daylight hours.
September in Guimarães, Portugal, offers a moderate likelihood of sunny weather, with a 39% chance of sunshine. This marks a dip from the brighter days of July and August, which boast a more promising 56% and 69% sunlight chance, respectively. As summer transitions to autumn, the sunny probabilities fluctuate, with September falling below the year's average but still above many winter months like February and December. As the warm glow of summer wanes, travelers can expect a blend of cloud cover and sunny intervals, making September a distinctive yet charming time to explore the historic streets of Guimarães.
As summer fades into autumn in Guimarães, Portugal, September offers a gentle transition with approximately 12 hours of daylight. Following the height of summer in June, where daylight peaked at 15 hours, the days begin to shorten gradually. August still enjoys a generous 13 hours, but September marks the start of a noticeable decline. This slight reduction reflects the onset of fall, leading into October's 11 hours of daylight. The evolving daylight duration captures the rhythmic shift of seasons, offering residents and visitors a blend of lingering warmth and the promise of cooler days ahead.
September in Guimarães, Portugal, marks a gentle transition as the summer winds begin to wane. With an average wind speed of 2.1 m/s (5 mph), this month mirrors the calmer late-summer breezes experienced in August, which recorded the lowest speed of the year at 1.9 m/s (4 mph). As we move into autumn, the winds pick up slightly again, hinting at the invigorating changes ahead, yet remain relatively moderate compared to the gustier months of December and January. This soothing breeze provides a perfect backdrop for leisurely strolls through the picturesque streets of Guimarães, allowing visitors to savor the comfortable shift in season while being cradled by the gentle whispers of the September air.
The weather in Guimaraes 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 Guimaraes and find detailed weather information for every month.
September and January present contrasting weather patterns. In September, temperatures range from a mild 6°C (43°F) at night to a warm maximum of 34°C (93°F) during the day, with an average of 19°C (67°F). The month experiences relatively low precipitation of 49 mm (1.9 in) over about six days, along with a humidity level of 71%. In contrast, January is much colder, with temperatures dipping as low as -4°C (25°F) and peaking at 21°C (70°F), averaging around 7°C (45°F). It is also wetter, with 132 mm (5.2 in) of rain falling over nine days and humidity rising to 87%. For more detailed weather information, you can check Guimaraes weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a cool 6°C (43°F) at night to a warm 34°C (93°F) during the day, with an average temperature of 19°C (67°F). The month sees relatively low precipitation of 49 mm (1.9 in) spread over about 6 days, accompanied by a humidity level of 71%. In stark contrast, February experiences much colder temperatures, with a minimum of -2°C (28°F) and a maximum of 23°C (73°F), averaging 10°C (50°F). This month is also significantly wetter, with 202 mm (7.9 in) of precipitation over 12 days and a higher humidity of 81%. For a more detailed look at February's weather, you can visit Guimaraes weather in February.
Comparing the weather in September and March reveals significant differences in temperature and precipitation patterns. September enjoys a warmer temperature range, with minimums around 6°C (43°F) and maximums reaching up to 34°C (93°F), averaging 19°C (67°F). In contrast, March experiences cooler conditions, with minimum temperatures dropping to 0°C (33°F) and a maximum of 25°C (78°F), averaging just 11°C (52°F).
Additionally, March sees much higher precipitation, totaling 192 mm (7.6 in) over approximately 12 days, compared to September's 49 mm (1.9 in) over just 6 days. The humidity is also slightly higher in March at 78% versus September's 71%. For those interested in a deeper dive into the weather specifics, you can find more information here: Guimaraes weather in March.
When comparing the weather in September and April, it's clear that each month has its unique characteristics. September boasts a wider temperature range, with minimums of 6°C (43°F) and maximums reaching up to 34°C (93°F), providing an average of 19°C (67°F). In contrast, April starts cooler, with a minimum of 1°C (34°F) and an average of 13°C (55°F), peaking at 26°C (80°F).
Precipitation also varies significantly; September experiences less rainfall (49 mm or 1.9 in) over just 6 days, while April sees much more rain at 170 mm (6.7 in) spread over 15 days. Humidity levels are relatively high in both months, with September at 71% and April slightly higher at 79%. For those interested in the specific weather conditions of April, you can find more detailed information at Guimaraes weather in April.
When comparing the weather in September and May, it’s clear that each month offers distinct characteristics. September tends to be warmer, with average temperatures reaching 19°C (67°F), peaking at a high of 34°C (93°F), while May features slightly cooler temperatures, averaging at 16°C (61°F) and a maximum of 31°C (89°F). Although September boasts fewer precipitation days, receiving 49 mm (1.9 in) over just 6 days, May sees significantly more rainfall at 103 mm (4.1 in) across 10 days. Additionally, May comes with higher humidity levels at 78%, compared to September's 71%. For a more detailed look at the weather in May, you can refer to Guimaraes weather in May.
When comparing the weather in September and June, we find that both months experience similar temperatures, with average highs reaching up to 34°C (93°F). September has a slightly warmer average of 19°C (67°F) compared to June's average of 18°C (64°F). Precipitation is higher in June, with 65 mm (2.5 in) over 9 days, while September sees 49 mm (1.9 in) across 6 days. Interestingly, both months share the same humidity level of 71%, making for a similarly tropical feel. For more detailed information about June weather, you can check Guimaraes weather in June.
In comparing the weather of September and July, we see that both months offer warm temperatures, with September registering a minimum of 6°C (43°F) and an average of 19°C (67°F), while July is slightly warmer with a minimum of 7°C (45°F) and an average of 21°C (69°F). The maximum temperatures are also quite similar, peaking at 34°C (93°F) in September and 35°C (95°F) in July. Notably, September experiences higher precipitation with 49 mm (1.9 in) over 6 days, compared to July's 29 mm (1.1 in) spread over just 5 days. Additionally, September tends to be more humid, with a humidity level of 71%, compared to 63% in July. For a more detailed look at July's weather, check out Guimaraes weather in July.
In comparing the weather conditions between August and September, September exhibits a slightly broader temperature range, with minimums of 6°C and maximums reaching up to 34°C, compared to August's minimum of 9°C and a maximum of 38°C. The average temperature in August is slightly higher at 21°C, while September averages 19°C. Precipitation also differs, with September receiving more rain at 49 mm over 6 days compared to August’s 28 mm in just 3 days. Additionally, September experiences a higher humidity level at 71%, compared to 64% in August. For more details, you can check Guimaraes weather in August.
September brings warmer days, with temperatures ranging from a mild 6°C (43°F) to a maximum of 34°C (93°F) and an average of 19°C (67°F). The month sees relatively low precipitation, totaling 49 mm (1.9 in) over about 6 days, while the humidity is around 71%. In contrast, October experiences cooler weather, with temperatures dropping to a minimum of 2°C (36°F), an average of 15°C (60°F), and a high of 32°C (89°F). Precipitation increases significantly to 151 mm (6.0 in) across approximately 11 days, and humidity also rises to 79%. For more detailed information, check out Guimaraes weather in October.
September offers a warmer climate with average temperatures around 19°C (67°F) and maximum highs reaching up to 34°C (93°F). The month experiences relatively low precipitation, totaling 49 mm (1.9 in) over about 6 days, with humidity levels at 71%. In contrast, November sees a significant drop in temperatures, averaging 11°C (52°F) and peaking at 22°C (72°F). This month is also much wetter, with precipitation measuring 206 mm (8.1 in) over 14 days and higher humidity at 86%. For more detailed insights, you can check out Guimaraes weather in November.
The weather in September and December starkly contrasts, highlighting the transition from late summer to winter. In September, temperatures can reach a comfortable average of 19°C (67°F), with highs peaking at 34°C (93°F) and only moderate rainfall of 49 mm (1.9 in) over about 6 days. In contrast, December sees a significant drop in temperature, where the average is just 9°C (49°F), with minimums dipping to -2°C (28°F) and maximums only reaching 18°C (65°F). Additionally, December is much wetter, with precipitation totaling 257 mm (10.1 in) spread over 16 days, accompanied by increased humidity levels at 87%. For more detailed information, check out Guimaraes weather in December.
As September unfolds in Guimarães, the weather begins to transition from the warmth of summer towards the cooler embrace of autumn. With temperatures still reaching pleasant highs during the day, the average dips enough to remind visitors of the impending change in seasons. The days are interspersed with occasional rainfall, but the overall humidity remains comfortably moderate. This unique blend creates an inviting atmosphere, making September an appealing month for exploration. To understand more about the charming climate throughout the year, check out Guimaraes Climate.