September Weather in Arenzano, Italy

Last updated: March 24, 2025

September in Arenzano, Italy offers a delightful mix of mild temperatures and refreshing coastal vibes. With a maximum temperature reaching 29°C (84°F) and an average temperature of 19°C (67°F), the weather is ideal for outdoor activities. However, visitors should prepare for occasional rain, as the month sees about 78 mm (3.1 in) of precipitation spread over 11 days, contributing to a humidity level of 74%. Whether you're exploring the charming streets or relaxing by the sea, Arenzano's September weather provides a perfect backdrop for an unforgettable experience.

September Temperature in Arenzano

As September rolls into Arenzano, Italy, the warmth of late summer lingers, offering a delightful transition into autumn. The temperatures typically range from a comfortable 8°C (47°F) at night to a pleasant 29°C (84°F) during the day, with an average of 19°C (67°F). This month marks a notable drop from the peak summer heat, yet it retains a lovely warmth that invites both locals and tourists to enjoy outdoor activities. The decrease in temperature from August hints at the approaching cooler months, but the crisp, sunny days of September still provide ample opportunity for scenic strolls along the stunning Ligurian coastline.

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

The chart illustrates September temperature patterns in Arenzano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414548546068727366584942
Data source: Temperature data for Arenzano 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 Arenzano

September in Arenzano, Italy, welcomes a shift in the weather, where the summer warmth begins to wane and the precipitation increases. With an average rainfall of 78 mm (3.1 in) over 11 days, this month marks a noticeable rise from the drier summer months, particularly August, which recorded only 48 mm. The increase serves as a prelude to the much wetter autumn months ahead, as October and November both see substantial rainfall—182 mm (7.2 in) and 212 mm (8.3 in) respectively. As the landscape transforms under this replenishing rainfall, September becomes a time of refreshing transition, paving the way for the lushness of fall in this picturesque Italian town.

September Precipitation Trends in Arenzano

The chart displays monthly precipitation patterns in Arenzano, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6672929112062644878183212129
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Arenzano

In September, Arenzano experiences a notable rise in humidity, stabilizing at 74%, which is a slight increase from the summer lows. Throughout the warmer months from July to August, humidity factors dip to their lowest at 67% and 64%, respectively, reflecting the drier Mediterranean climate. As autumn approaches, the humidity begins to climb again, signaling a transition toward the more humid conditions typical of the upcoming months. This upward trend continues into October, where humidity spikes to 87%, and will remain elevated through winter, creating a comfortable yet moist atmosphere in this picturesque Italian coastal town.

September Average Humidity in Arenzano

This chart illustrates the average monthly humidity levels in Arenzano, 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.
JanFebMarAprMayJunJulAugSepOctNovDec88%81%76%77%74%71%67%64%74%87%88%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Arenzano

As summer draws to a close, September in Arenzano, Italy, sees a slight dip in the UV Index compared to the peak months of July and August. With a UV Index of 7, categorized as high, sun-seekers should be mindful of their exposure, as the recommended burn time is 25 minutes. This reflects a trend of decreasing UV intensity as autumn approaches, following a season characterized by very high readings in June and July. Despite the lower UV levels, protective measures are still advisable to enjoy the warm early autumn sun safely. For more details on daily UV levels, visit Arenzano UV Index.

Maximum UV Index Levels in Arenzano for September

The chart shows the monthly maximum UV Index (UVI) for Arenzano 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.
JanFebMarAprMayJunJulAugSepOctNovDec236789987532
Data source: Arenzano 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 Arenzano

September in Arenzano, Italy, marks the gentle transition from summer's vibrant embrace to the crispness of autumn, offering 339 hours of sunshine. While this is a notable decline from the peak of 425 hours in July, it still provides plenty of warm, sun-drenched days to relish. The vibrant glow of late summer lingers, creating the perfect backdrop for outdoor activities. As the sun starts to wane, this month gracefully bridges the sun-soaked pleasures of summer and the cozy charms of fall, making September an inviting time to explore the scenic beauty of this coastal gem.

Monthly Sunshine Duration in Arenzano: September Highlighted

The September sunshine duration represents the total number of hours Arenzano 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.
JanFebMarAprMayJunJulAugSepOctNovDec186h228h308h343h388h410h425h395h339h293h223h220h
Data source: Arenzano September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Arenzano During September

In Arenzano, Italy, September offers a moderate 46% chance of sunny weather, aligning closely with the trends seen in both April and July, which also hover around this percentage. As summer fades into autumn, you can expect a shift from the more frequent sunshine of August, when the chances peak at 56%. This transitional month provides a pleasant balance of sun and cloud, making it an ideal time for outdoor activities. While the probability of sunny days is slightly reduced compared to the heights of summer, September still presents a favorable outlook for those seeking to enjoy the lingering warmth of the Italian coastline.

Percentage of Sunny Days in September in Arenzano

The chart illustrates the percentage of sunny days in Arenzano 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 Arenzano experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec36%42%58%46%40%46%46%56%46%50%35%47%
Data source: Arenzano September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Arenzano in September

As summer bids farewell in September, Arenzano, Italy, experiences a gentle transition towards autumn with approximately 12 hours of daylight. This month marks a decrease from the peak of 15 hours seen in both June and July, signaling shorter days ahead. While the daylight hours remain generous compared to the chilling winter months, this gradual decline highlights the shifting seasons. The trend of increasing daylight from January's 9 hours to June's zenith mirrors the vibrant life of spring and summer, but September serves as a beautiful reminder of nature’s cyclical rhythm, offering a perfect blend of warmth and a hint of the cooler days to come.

Average Daylight Hours in Arenzano for September

The chart illustrates the variation in daylight duration in Arenzano throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 15m10h 26m11h 56m13h 29m14h 48m15h 28m15h 7m13h 57m12h 28m10h 56m9h 34m8h 52m
Data source: Arenzano daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Arenzano

As summer fades into autumn, September in Arenzano, Italy, brings a gentle transition in wind patterns. With an average wind speed of 2.0 m/s (4 mph), this month marks the calmest winds of the year, reflecting a soothing retreat from the stronger breezes of summer. The trend reveals a gradual decline in wind speed from July through September, where the typical summer gusts give way to a serene atmosphere ideal for leisurely strolls along the coast. This tranquil shift sets the stage for the more invigorating winds of October, promising a refreshing change just around the corner. As September whispers its farewell, the landscape prepares for the brisk embrace of autumn, gifting Arenzano with a perfect blend of calm and anticipation.

Average September Wind Speed in Arenzano

The chart displays monthly wind speed patterns in Arenzano, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.72.62.62.82.62.22.12.42.0 m/s2.93.32.4
Data source: Arenzano September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Arenzano Compares to Other Months

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

September and January present notably different weather conditions. In September, temperatures range from a minimum of 8°C (47°F) to a maximum of 29°C (84°F), with an average of 19°C (67°F). The month experiences about 78 mm (3.1 in) of precipitation over 11 days and a humidity level of 74%. In contrast, January is much colder, with temperatures varying from a minimum of -6°C (21°F) to a maximum of 15°C (59°F) and an average of only 5°C (41°F). Precipitation decreases to 66 mm (2.6 in) over 7 days, but the humidity remains high at 88%. For a more detailed look at January weather, you can visit Arenzano weather in January.

September and February present distinctly different weather patterns. In September, temperatures typically range from a mild 8°C (47°F) at night to a warm 29°C (84°F) during the day, with an average temperature of 19°C (67°F). This month sees about 78 mm (3.1 in) of precipitation over approximately 11 days, alongside a humidity level of 74%. In contrast, February is much cooler, with temperatures fluctuating from a chilly -5°C (24°F) at night to a maximum of 18°C (64°F) during the day, resulting in an average of 7°C (45°F). Precipitation is slightly lower at 72 mm (2.8 in), occurring over around 10 days, but humidity rises to 81%. For a more detailed look at the weather in February, you can check out Arenzano weather in February.

September and March present contrasting weather conditions. In September, temperatures range from a comfortable minimum of 8°C (47°F) to a pleasant maximum of 29°C (84°F), with an average of 19°C (67°F). The month sees about 78 mm (3.1 in) of precipitation over 11 days, while humidity sits at 74%. In contrast, March experiences cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 21°C (69°F), averaging at 9°C (48°F). March also has slightly higher precipitation at 92 mm (3.6 in) across 9 days, coupled with a humidity of 76%. For more details about March weather, you can check Arenzano weather in March.

In comparing the weather between September and April, we observe notable differences in temperature and precipitation. September boasts a broader temperature range, with minimums around 8°C (47°F) and maximums reaching up to 29°C (84°F), while April’s temperatures are cooler, starting at a minimum of 1°C (33°F) and peaking at 25°C (77°F). Additionally, September experiences slightly lower precipitation at 78 mm (3.1 in) over 11 days, compared to April's 91 mm (3.6 in) distributed across 9 days. Humidity levels are relatively similar, with September at 74% and April slightly higher at 77%. For more specific details about April weather, you can check this link: Arenzano weather in April.

September and May present some noticeable differences in weather patterns. In September, temperatures range from a minimum of 8°C (47°F) to a maximum of 29°C (84°F), with a comfortable average of 19°C (67°F). The month experiences around 78 mm (3.1 in) of precipitation over approximately 11 days, maintaining a consistent humidity level of 74%. Conversely, May has slightly cooler temperatures, with a minimum of 4°C (40°F) and an average of 16°C (60°F), peaking at 29°C (85°F). Rainfall is more significant in May, totaling 120 mm (4.7 in) spread across about 16 days, yet humidity remains steady at 74%. For more detailed insights into May's weather, visit Arenzano weather in May.

September and June offer distinct weather experiences. In June, temperatures range from a minimum of 12°C (54°F) to a maximum of 34°C (94°F), with an average temperature of 20°C (69°F), making it generally warmer than September. June also sees slightly less precipitation at 62 mm (2.4 in) over about 10 days and a humidity level of 71%. In contrast, September's temperatures range from 8°C (47°F) to 29°C (84°F), with an average of 19°C (67°F). It experiences more precipitation at 78 mm (3.1 in) spread over 11 days, with a slightly higher humidity of 74%. For detailed insights on June weather, check Arenzano weather in June.

In comparing the weather between September and July, July tends to be warmer, with average temperatures ranging from a minimum of 14°C (58°F) to a maximum of 33°C (91°F) and an average of 22°C (73°F). In contrast, September experiences cooler temperatures, with a minimum of 8°C (47°F) and a maximum of 29°C (84°F), averaging around 19°C (67°F). Additionally, July receives slightly less precipitation at 64 mm (2.5 in) over 9 days, while September sees more rain, totaling 78 mm (3.1 in) over 11 days. Humidity levels are also higher in September at 74%, compared to July's 67%. For more detailed insights about July weather in Arenzano, you can visit Arenzano weather in July.

In comparing the weather of September to August, September shows a notable decrease in average temperatures, with morning lows dropping from 14°C (57°F) in August to 8°C (47°F) in September. The average daytime temperature also declines from 23°C (74°F) to 19°C (67°F), while the maximum temperature is slightly lower in September at 29°C (84°F) compared to 32°C (89°F) in August. Additionally, September experiences increased humidity at 74% and more precipitation, totaling 78 mm (3.1 in) over 11 days, compared to 48 mm (1.9 in) over 10 days in August. For more detailed information about weather in August, visit Arenzano weather in August.

September typically enjoys milder temperatures, with averages around 19°C (67°F) and maximums reaching up to 29°C (84°F). The weather during this month is also relatively drier, with around 78 mm (3.1 in) of precipitation spread over 11 days and a humidity level of 74%. In contrast, October brings a noticeable drop in both temperature and increased rainfall. With average temperatures around 15°C (59°F) and maximums of 25°C (77°F), it feels much cooler, and the month experiences significantly higher precipitation at 182 mm (7.2 in) also over 11 days, while humidity rises to 87%. For those interested in more detailed information, check out this link: Arenzano weather in October.

September offers a warm transition into autumn, with average temperatures ranging from a mild 8°C (47°F) at night to a comfortable 29°C (84°F) during the day. The humidity is relatively high at 74%, and with 78 mm of rainfall spread over 11 days, the weather can be unpredictable. In contrast, November experiences a significant drop in temperatures, featuring a chilly minimum of 1°C (33°F) and an average high of just 17°C (63°F). The month is marked by much heavier rainfall, accumulating to 212 mm over 14 days, and the humidity rises to 88%. For a comprehensive look at what to expect, check out Arenzano weather in November.

September and December present striking contrasts in weather patterns. In September, temperatures range from a mild 8°C (47°F) to a warm 29°C (84°F), providing an inviting average of 19°C (67°F). With 78 mm of precipitation over 11 days and a humidity level of 74%, it’s a month characterized by pleasant late summer conditions. In stark contrast, December ushers in much colder temperatures, with minimums dropping to -2°C (28°F) and an average of only 6°C (42°F). The maximum temperature barely reaches 16°C (61°F), while the month sees increased precipitation of 129 mm over 10 days and higher humidity levels at 85%. For more insights on December weather in this region, you can visit Arenzano weather in December.

Compare Arenzano's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Arenzano

September in Arenzano offers a pleasant transition from the heat of summer to the cooler embrace of autumn. With warmer days peaking around 29°C, the weather is still inviting for outdoor activities, yet it gradually cools down, especially at night when temperatures can dip to a refreshing 8°C. While you can expect some rain—averaging 78 mm over 11 days—the overall humidity remains at a comfortable 74%, making it feel less sticky than the peak summer months. This delightful mix of warmth and mild conditions makes September a unique and enjoyable time to visit. For a more detailed look at the weather patterns, check out Arenzano Climate.