Last updated: March 24, 2025
In September, Castelsardo, Italy, offers a delightful blend of warm temperatures and refreshing sea breezes. With a maximum temperature reaching 28°C (83°F) and an average of 22°C (72°F), the weather is perfect for exploring the picturesque coastline. Nights cool down to a minimum of 14°C (57°F), providing a comfortable setting for evening strolls. While September sees around 61 mm (2.4 in) of precipitation over 6 days, the humidity levels hover at a pleasant 68%, making it an inviting time for visitors looking to soak in the charm of this coastal gem. Enjoy a mix of sunny days and the occasional refreshing shower as you experience the beauty of Castelsardo this fall.
September in Castelsardo, Italy, marks the delightful transition from summer’s peak to the gentle embrace of autumn. With average temperatures settling at a mild 22°C (72°F), visitors can enjoy warm days without the sweltering heat that characterizes the height of summer. The maximum temperature reaches a comfortable 28°C (83°F), ideal for those looking to savor the sun, while nighttime lows dip to a pleasant 14°C (57°F), perfect for evening strolls along the captivating coast. As the month progresses, the refreshing sea breezes and stunning sunsets create a picturesque backdrop, making September an excellent time for exploring this charming locale.
In September, Castelsardo experiences a noticeable uptick in precipitation compared to the dry summer months, receiving 61 mm (2.4 in) of rain over approximately 6 days. This increase marks a transition from the arid conditions of July and August, where rainfall was minimal at just 11 mm and 12 mm respectively. As the summer heat begins to wane, September serves as a reminder of the approaching autumn, offering a refreshing contrast with its moderate showers. While precipitation levels dip slightly in October, which sees 57 mm (2.2 in), this shift hints at the wetter months ahead, with November typically bringing the heaviest rainfall of the year at 128 mm (5.0 in). The measured shifts in precipitation not only reflect seasonal changes but also the rich climatic tapestry that characterizes this picturesque coastal town in Italy.
In September, Castelsardo, Italy, experiences a shift in humidity, with levels at 68%, marking a slight rise from the drier summer months of July and August, which recorded 69% and 66%, respectively. This transition signals the approach of autumn, as the air becomes more moisture-laden compared to the warm summer days. Interestingly, the humidity in September is lower than the annual peak seen in January at 79% but remains comfortably moderate, setting the stage for the increased humidity typical of the fall months ahead, noticeable in October at 75% and November reaching 78%. This gradual humidity increase not only influences the local climate but also enhances the enchanting atmosphere of this coastal town as it prepares for the vibrant colors of autumn.
In September, Castelsardo experiences a UV Index of 7, categorizing it as high exposure, with a burn time of 25 minutes. This marks a slight dip from the peak of summer, where the UV Index consistently reached 9 or 10, indicating very high exposure and a much shorter burn time of just 15 minutes. As the days begin to shorten and temperatures cool, sun-seekers in September can enjoy a balance of warmth and sunshine while remaining mindful of UV risks. The trend shows a gradual decrease from the intense summer months into autumn, making this a perfect time for outdoor adventures while keeping skin protection in mind. For more detailed insights, visit Castelsardo UV Index.
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As the summer fades, September in Castelsardo, Italy, offers a beautiful transition marked by an impressive 343 hours of sunshine. This month follows a peak in July, which boasts the highest sunshine hours at 430, while August experiences a slight decline with 397 hours. The trend is clear: September retains a substantial amount of sunlight, making it an ideal time for visitors to enjoy the lingering warmth of summer without the tourist crowds. As the days grow shorter and we move into October, which also enjoys a respectable 316 hours, September serves as a radiant farewell to the sunny season, inviting leisurely strolls along the coastline and vibrant sunsets over the Mediterranean.
In Castelsardo, Italy, the likelihood of sunny weather sees distinct trends as the year progresses. Starting with the winter months, January's chances are a mere 31%, gradually rising to 49% in February, demonstrating a hint of optimism as spring approaches. As the days grow longer, March and April bring notable increases, with sunshine probabilities peaking at a striking 73% in July and 74% in August. However, by September, the chance of sun drops to 47%, signaling the transition into autumn. Despite this decline, September still offers a reasonably bright end to summer, making it a pleasant time to enjoy the picturesque beauty of Castelsardo before the cooler months set in.
As September arrives in Castelsardo, Italy, the daylight begins to wane, offering around 12 hours of sunlight—a gentle decline from the peak of 15 hours during June. This month serves as a transitional period, bridging the vibrant long days of summer and the shorter, cozier autumn months ahead. Following the bustling warmth of July and August, which both boast 14 and 13 hours of daylight, September presents a more subdued rhythm, inviting residents and visitors alike to savor the soft golden hues of early autumn. The daylight duration will continue to decrease heading into October, a clear reminder of nature's cyclical dance as the year progresses towards winter.
As summer transitions to autumn in Castelsardo, Italy, September greets visitors with a gentle breeze, featuring an average wind speed of 4.0 m/s (9 mph). This wind speed reflects a continuation of the relatively calm conditions that characterize the summer months, with August also recording the same breeziness. However, as the year progresses into October and November, a noticeable uptick occurs, with wind speeds rising to 5.3 m/s (12 mph) in November, indicating that the autumn months tend to bring slightly stronger gusts. This trend illustrates a gradual return to more invigorating winds, making September a perfect time for leisurely strolls by the coast before the breezes pick up in the following months. Whether you're relaxing under the sun or exploring the charming streets of Castelsardo, the September winds create an inviting atmosphere for all to enjoy.
The weather in Castelsardo 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 Castelsardo and find detailed weather information for every month.
September and January present distinctly different weather patterns. In September, temperatures are more moderate, with a minimum of 14°C (57°F) and an average of 22°C (72°F), peaking at 28°C (83°F). The month experiences about 61 mm (2.4 in) of precipitation over 6 days, along with a humidity level of 68%. In contrast, January is much cooler, with temperatures ranging from a minimum of 5°C (41°F) to an average of 11°C (52°F) and a maximum of 17°C (62°F). This month sees a higher precipitation level of 68 mm (2.7 in) spread over 11 days and higher humidity at 79%. For more detailed insights on January weather, check out Castelsardo weather in January.
September typically boasts warmer temperatures, with average highs around 28°C (83°F), while February sees much cooler conditions, with average highs only reaching 20°C (68°F). The minimum temperatures in September are also significantly higher at 14°C (57°F) compared to February's chilly 3°C (37°F). Precipitation is fairly similar in both months, with September receiving 61 mm (2.4 in) over 6 days, while February accounts for 56 mm (2.2 in) spread across 8 days. Additionally, February tends to have slightly higher humidity at 72% compared to September's 68%. For more detailed insights on February weather, visit Castelsardo weather in February.
In September, the weather is notably warmer, with average temperatures reaching around 22°C (72°F) and maximum highs of 28°C (83°F), making it a comfortable month for outdoor activities. In contrast, March experiences much cooler temperatures, averaging 12°C (54°F) and peaking at 18°C (65°F), which can feel quite brisk, especially with a minimum of 4°C (39°F). Although September sees slightly more rainfall at 61 mm over about 6 days, March approaches with a total of 49 mm of precipitation spread across 8 days, contributing to its higher humidity level of 70%. For more details on March weather, you can visit Castelsardo weather in March.
When comparing the weather in September to that of April, there are notable differences in temperature and precipitation. September features a mild climate with average temperatures ranging from a low of 14°C (57°F) to a high of 28°C (83°F), while April is cooler, with average temperatures between 7°C (44°F) and 20°C (68°F). Precipitation is also more abundant in September, totaling 61 mm (2.4 in) over approximately 6 days, compared to April's 44 mm (1.7 in) spread over 8 days. Additionally, humidity levels are slightly higher in April at 74%, versus 68% in September. For travelers interested in the weather specifics, they can find more information here: Castelsardo weather in April.
In comparing the weather of September and May, we observe some notable differences and similarities. September tends to be warmer, with average temperatures around 22°C (72°F), peaking at 28°C (83°F), while May is cooler, averaging 17°C (63°F) with a maximum of 27°C (81°F). Despite these differences, both months experience similar levels of precipitation, averaging about 61-62 mm (2.4 in) with rain on approximately six to seven days. Additionally, September has a slightly lower humidity at 68% compared to May's 72%. For those interested in more details, you can check the weather specifics for the region here: Castelsardo weather in May.
The weather in September is characterized by slightly warmer average temperatures compared to June, with September's range extending from a minimum of 14°C (57°F) to a maximum of 28°C (83°F). In contrast, June features a minimum of 15°C (58°F), but similarly peaks at 28°C (83°F). Precipitation levels in September are noticeably higher, averaging 61 mm (2.4 in) across six days, while June is much drier with only 18 mm (0.7 in) over three days. The humidity levels are comparable, with September at 68% and June slightly higher at 70%. For more specific details on June weather, refer to Castelsardo weather in June.
In comparing the weather between September and July, we can see some notable differences. September carries a cooler temperature range with a minimum of 14°C (57°F) and a maximum of 28°C (83°F), averaging around 22°C (72°F). It also experiences more rain, with 61 mm (2.4 in) of precipitation over about six days, leading to a humidity level of 68%. In contrast, July is warmer, with minimum temperatures of 19°C (67°F) and maximum temperatures reaching 32°C (89°F), averaging at 24°C (76°F). Rainfall is minimal in July, with only 11 mm (0.4 in) spread over just two days, resulting in a slightly higher humidity of 69%. For more details on July weather in Castelsardo, you can check out Castelsardo weather in July.
In comparing the weather between August and September, we see notable differences in temperature and precipitation patterns. August tends to be warmer, with minimum temperatures around 20°C (68°F) and averages reaching up to 25°C (77°F). In contrast, September sees cooler temperatures, with a minimum of 14°C (57°F) and an average of 22°C (72°F). While August experiences low precipitation of only 12 mm (0.5 in) over just 2 days, September is comparatively wetter, receiving 61 mm (2.4 in) across 6 days, leading to a slightly higher humidity level of 68% compared to August's 66%. For more details on August weather, you can check Castelsardo weather in August.
September generally offers warmer temperatures compared to October, with an average high of 28°C (83°F) compared to October’s 26°C (79°F). The minimum temperatures in September also tend to be slightly higher, at 14°C (57°F), while October sees lower lows at 12°C (54°F). Both months experience similar precipitation, with September recording 61 mm (2.4 in) over 6 days and October slightly less at 57 mm (2.2 in) but spread across 9 days. Notably, October has a higher humidity level at 75% compared to September's 68%, contributing to a more muggy feel. For more insights on the weather in October, you can check Castelsardo weather in October.
In comparing the weather of September and November, a notable difference in temperature and precipitation stands out. September enjoys milder temperatures, with averages around 22°C (72°F) and maximums reaching 28°C (83°F), while November sees a significant drop, with an average of 15°C (59°F) and maximums only up to 21°C (70°F). Additionally, November experiences much higher precipitation, totaling 128 mm (5.0 in) over 16 days, compared to September's 61 mm (2.4 in) across just 6 days. The humidity also rises in November to 78%, contrasting with September's 68%. For a detailed look at November weather patterns, you can visit Castelsardo weather in November.
September and December present contrasting weather patterns. In September, temperatures are relatively mild, with an average of 22°C (72°F) and daily highs reaching up to 28°C (83°F). This month experiences less precipitation, totaling 61 mm (2.4 in) over approximately 6 days, and the humidity level averages around 68%. In contrast, December brings cooler conditions with an average temperature of 12°C (55°F), peaking at 18°C (64°F) and dipping as low as 7°C (44°F). Additionally, it is a wetter month, with 107 mm (4.2 in) of rainfall spread across about 13 days and a higher humidity of 76%. For more detailed information, you can check Castelsardo weather in December.
As September rolls in, Castelsardo experiences a delightful transition in weather, characterized by moderate temperatures and a touch of autumn humidity. With the warmth of summer still lingering, daily highs can reach a pleasant 28°C, while evenings cool down to a refreshing 14°C. This month marks a slight uptick in precipitation, with occasional showers occurring about six days, contrasting with the drier summer months. As such, September in Castelsardo offers a harmonious blend of warmth and mildness, making it an ideal time for exploration and relaxation. For a more in-depth look at the weather patterns throughout the year, check out Castelsardo Climate.