Last updated: March 24, 2025
In September, San Clemente, Italy experiences a delightful transition into autumn, characterized by a maximum temperature of 32°C (90°F) and a comfortable average of 21°C (71°F). While temperatures dip to a minimum of 10°C (50°F) at night, the warm days invite outdoor exploration. Visitors can expect a bit of rain, with approximately 100 mm (3.9 in) of precipitation over 8 days, adding a refreshing touch to the landscape. With humidity levels around 65%, the air remains pleasantly mild, making September an inviting time for travelers to enjoy the charming scenery and local culture of this picturesque Italian locale.
In September, San Clemente, Italy, experiences a delightful transition into autumn, with temperatures showcasing a perfect blend of warmth and coolness. The minimum temperature settles at a mild 10°C (50°F), while the average climbs to a pleasant 21°C (71°F), peaking at a warm 32°C (90°F) during the day. This month marks a continuation of the summer heat, with highs still reflecting the lingering warmth of August, yet hinting at the cooler days ahead. As outdoor activities abound, the balanced temperatures make September an ideal time to explore the scenic beauty of the region before the cooler autumn months set in.
In September, San Clemente experiences a noticeable shift in precipitation, receiving 100 mm (3.9 in) of rain over 8 days. This marks a significant increase compared to the drier summer months, where July and August saw minimal rainfall of 23 mm (0.9 in) and 21 mm (0.8 in) respectively. As the summer heat gives way to autumn, the uptick in moisture hints at the changing seasons, leading into wetter months ahead. It's interesting to note that this is higher than the precipitation levels of May and June, underscoring September's role as a transition month. As the year progresses, rainfall continues to climb, peaking dramatically in November with an average of 278 mm (10.9 in), solidifying the notion that the region is well-prepared for a lush, invigorating fall.
In September, San Clemente experiences a noticeable shift in humidity, with levels rising to 65% as the summer heat begins to wane. This increase marks a transition from the sultry dryness of August, which boasts the lowest humidity at 53%. Following the peak summer months, where humidity dips to its lowest, September's more moderate levels signal the start of a gradual climb toward the wetter autumn months. As the year progresses, humidity trends indicate a consistent rise, culminating in 84% in December, with the fall months bridging the gap between summer dryness and winter moisture. Thus, September serves as a pivotal point, balancing lingering warmth with a hint of the approaching rainy season.
As September unfolds in San Clemente, Italy, the UV Index remains elevated at 8, indicating a very high exposure category and a burn time of just 15 minutes. This trend mirrors the scorching summer months of July and June, where a peak UV Index of 10 was recorded. Following the hot months, September provides a slight reprieve, but sun protection remains crucial as the sun's intensity is still significant. This month’s Index showcases a gradual decline heading into autumn, with a notable drop to 6 in October, and a sharp decrease in UV levels as winter approaches. For tips on safeguarding your skin while enjoying the Mediterranean sun, check out the detailed forecasts at San Clemente UV Index.
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As summer gracefully transitions into fall, September in San Clemente welcomes a significant dip in sunshine compared to the sun-drenched days of July and June, which boast the highest recorded hours of over 400. With 336 hours of bright daylight, September still offers a generous array of sunny moments, perfect for enjoying the warm Italian ambiance. This month reflects a gradual decline in sunshine, hinting at the imminent cooler months ahead, yet it remains vibrant compared to the earlier months of the year, such as January, which only sees 193 hours. The consistent upward trend from January through August presents a peak in summer, making September a delightful blend of lingering warmth and the promise of autumn's embrace.
September in San Clemente, Italy, offers a delightful return to moderate sunshine, with a sunny probability of 53%. As summer fades, the likelihood of clear skies remains significant, echoing the higher percentages seen in the peak months of July and August, both at a sunny 74%. This trend showcases a gradual decline from the summer’s vibrant sunshine, yet September still provides a respectable chance for enjoying outdoor activities under the warm sun. Following this, the likelihood dips again in October, indicating that those seeking a blend of sun and the charm of early autumn should take advantage of September's favorable weather before cooler days arrive.
As summer transitions into autumn, September in San Clemente, Italy, witnesses a gentle decline in daylight, averaging 12 hours of sunshine compared to the longer days of July and August when daylight peaked at 14 hours. This gradual reduction is part of a broader trend, as daylight starts at a robust 9 hours in January and gradually increases to a maximum of 15 hours in June, before tapering off into the shorter days of fall and winter. The shift from summer's vibrant light to the softer hues of September signals a change in season, inviting the rich colors and cozy atmospheres associated with autumn in this picturesque Italian locale.
As September rolls into San Clemente, Italy, the gentle breeze begins to whisper the changing of the seasons, with an average wind speed of 1.7 m/s (4 mph). This is a slight dip from the summer months, which consistently enjoyed mild winds averaging around 2.0 m/s (4 mph). Notably, this pattern hints at a transition, where the mid-summer vitality gives way to the softer caress of early autumn. As the winds calm, the town’s tranquil atmosphere becomes perfect for leisurely strolls along its picturesque coastline, inviting visitors to soak up the last warm rays of the sun before winter's approach. With October bringing a slight increase back to 2.1 m/s (5 mph), San Clemente’s winds seem to gently remind us that while change is inevitable, the charm of this coastal haven remains timeless.
The weather in San Clemente 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 San Clemente and find detailed weather information for every month.
September and January present stark contrasts in weather, showcasing the transition from late summer to mid-winter. In September, temperatures range from a minimum of 10°C (50°F) to a maximum of 32°C (90°F), making it a generally warm month with an average of 21°C (71°F). The humidity stands at 65%, and the month sees approximately 100 mm (3.9 in) of precipitation over about 8 days. In contrast, January experiences much colder temperatures, with a minimum of -7°C (20°F), an average of 7°C (45°F), and a maximum of 18°C (65°F). The month has a slightly lower total precipitation of 88 mm (3.5 in) spread over 10 days, and humidity levels rise to 84%. For further specifics on January weather, you can explore San Clemente weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a mild 10°C (50°F) at night to a warm 32°C (90°F) during the day, with an average of 21°C (71°F). This month experiences around 100 mm (3.9 in) of precipitation over about 8 days, accompanied by a moderate humidity of 65%. In contrast, February is much colder, with nighttime lows dipping to -5°C (23°F) and daytime highs averaging only 18°C (65°F), resulting in an average temperature of 9°C (49°F). This month sees slightly higher precipitation at 132 mm (5.2 in) across 10 days, along with increased humidity of 76%. For more insights, you can explore San Clemente weather in February.
In September, temperatures range from a mild 10°C (50°F) at night to a warm 32°C (90°F) during the day, with an average of 21°C (71°F). The month experiences about 100 mm (3.9 in) of precipitation over approximately 8 days, with a humidity level of 65%. In contrast, March is much cooler, with nighttime lows dropping to -3°C (26°F) and daytime highs reaching 21°C (70°F). The average temperature is only around 10°C (51°F), and precipitation slightly increases to 102 mm (4.0 in) over 11 days, with humidity rising to 69%. For more detailed insights into the precipitation and temperature patterns, you can refer to San Clemente weather in March.
When comparing September and April weather, September generally offers warmer temperatures with a minimum of 10°C (50°F) and an average of 21°C (71°F), peaking at a maximum of 32°C (90°F). In contrast, April features cooler conditions, with temperatures ranging from a chilly 0°C (33°F) to a comfortable 28°C (83°F), averaging only 13°C (56°F). While September experiences slightly more precipitation at 100 mm (3.9 in) over 8 days, April sees 74 mm (2.9 in) spread across 11 days, indicating a higher chance of rain during that month. Additionally, April’s humidity is slightly higher at 70% compared to September’s 65%. For more detailed information about the weather in April, check out San Clemente weather in April.
September and May present distinct weather patterns characterized by variations in temperature and precipitation. In September, temperatures range from a minimum of 10°C (50°F) to a maximum of 32°C (90°F), with an average of 21°C (71°F). This month typically experiences 100 mm (3.9 in) of precipitation over 8 days and maintains a humidity level of about 65%. In contrast, May sees cooler temperatures, with readings between 5°C (41°F) and 31°C (88°F), averaging 17°C (63°F). Precipitation in May is lower, at 72 mm (2.8 in) over a slightly longer duration of 12 days, accompanied by a humidity level of 70%. The overall warmth of September makes it a more pleasant month for outdoor activities, while May is characterized by its milder and slightly wetter conditions. For more specific details, you can check San Clemente weather in May.
In comparing the weather between September and June, we notice some notable differences. June tends to be slightly warmer on average, with temperatures reaching up to 33°C (92°F) compared to September's maximum of 32°C (90°F). Both months start with similar minimum temperatures at 10°C (50°F), but September experiences a slightly lower average temperature of 21°C (71°F) compared to June's 22°C (72°F). Precipitation is more frequent in September with 100 mm (3.9 in) over 8 days, while June sees only 46 mm (1.8 in) across 7 days. Despite this, June has slightly lower humidity at 61%, compared to September's 65%. For a detailed look at June weather, you can visit San Clemente weather in June.
When comparing the weather between July and September, we see some notable differences. July tends to be warmer, with an average temperature of 25°C (77°F) compared to September's average of 21°C (71°F). The maximum temperature in July can reach up to 34°C (94°F), while September peaks at 32°C (90°F). Additionally, July experiences significantly less precipitation, totaling only 23 mm (0.9 in) over 4 days, in contrast to September's 100 mm (3.9 in) spread across 8 days. Humidity is also slightly higher in September at 65%, compared to July's 57%. For more details on the weather specifics, visit San Clemente weather in July.
September experiences a notable transition in weather compared to August. While August boasts warmer temperatures with a minimum of 16°C (62°F) and an average of 25°C (78°F), September cools down significantly, starting at a low of 10°C (50°F) and averaging 21°C (71°F). Additionally, September sees increased precipitation, totaling 100 mm (3.9 in) across 8 days, in stark contrast to August's relatively dry conditions, which only bring about 21 mm (0.8 in) over 5 days. The humidity also rises in September to 65%, compared to August’s lower humidity rate of 53%. For more detailed insights, you can check San Clemente weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures are generally warmer, with an average of 21°C (71°F), peaking at a maximum of 32°C (90°F). The month sees 100 mm (3.9 in) of precipitation over about 8 days and maintains a humidity level of 65%. In contrast, October experiences cooler conditions, with an average temperature of 17°C (62°F) and a maximum of 27°C (80°F). Precipitation slightly increases to 105 mm (4.1 in) over approximately 9 days, accompanied by higher humidity at 75%. For more details on October weather, visit San Clemente weather in October.
September and November present a marked contrast in weather conditions. In September, temperatures range from a pleasant minimum of 10°C (50°F) to a maximum of 32°C (90°F), with an average of 21°C (71°F), making it an ideal time for outdoor activities. However, this month also sees around 100 mm (3.9 in) of precipitation over 8 days, with humidity levels at 65%. In contrast, November brings much cooler temperatures, with a minimum of 1°C (34°F) and an average of 13°C (56°F), peaking at 21°C (71°F). The month is significantly wetter, receiving 278 mm (10.9 in) of rain over 16 days and higher humidity at 81%. For more detailed information about the weather conditions in November, you can check San Clemente weather in November.
In September, the weather is characterized by warmer temperatures, ranging from a minimum of 10°C (50°F) to a comfortable average of 21°C (71°F), peaking at 32°C (90°F). However, it does see some rainfall, with about 100 mm (3.9 in) of precipitation over 8 days and a humidity level of 65%. In contrast, December brings a sharp drop in temperatures, with a minimum of 0°C (32°F) and an average of only 9°C (49°F), reaching a maximum of 17°C (63°F). The precipitation also increases significantly, totaling 187 mm (7.4 in) over 13 days and a higher humidity of 84%. For a closer look at what to expect, check out San Clemente weather in December.
As summer transitions into fall, September in San Clemente brings a delightful shift in weather. With average temperatures hovering around a comfortable 21°C (71°F), this month offers a perfect balance between the lingering warmth of summer and the cooler breezes of autumn. Although September experiences about 8 days of rainfall, the overall precipitation is moderate, making it an ideal time for outdoor activities. The humidity level remains fairly consistent at 65%, contributing to a pleasant atmosphere. For those looking to explore the nuances of San Clemente's climate throughout the year, be sure to check out San Clemente Climate.