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September Weather in Somma Lombardo, Italy

Last updated: August 23, 2025

In September, the average temperature in Somma Lombardo, Italy is a pleasant 19°C (67°F), with minimums dipping to 8°C (46°F) and maximums soaring to 29°C (85°F). Expect 122 mm (4.8 in) of precipitation spread over 11 days, contributing to a humidity level of 74%. Embrace the mild climate, whether you're exploring or relaxing!

September Temperature in Somma Lombardo

In September in Somma Lombardo, the average temperature is 19°C (67°F). Maximums can reach 29°C (85°F), and minimums can be as low as 8°C (46°F). This mild weather makes Somma Lombardo an ideal destination for travelers seeking a comfortable climate.

September Weather in Somma Lombardo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Somma Lombardo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Somma Lombardo, September typically has an average temperature of 19°C (67°F), with highs reaching up to 29°C (85°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec404448566372757567584941
Data source: Temperature data for Somma Lombardo 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 Somma Lombardo

In Somma Lombardo in September, the total precipitation amount is 122 mm (4.8 in) over a span of 11 days.

September Precipitation Trends in Somma Lombardo

The chart displays monthly precipitation patterns in Somma Lombardo, 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. In Somma Lombardo, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec51469312714015512710812221418094
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Somma Lombardo

In Somma Lombardo in September, humidity is 74%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling, often leading travelers to seek shade and hydrate frequently.

September Average Humidity in Somma Lombardo

This chart illustrates the average monthly humidity levels in Somma Lombardo, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Somma Lombardo is approximately 74%, offering insight into how humid the weather typically is during this month.
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 Somma Lombardo

In Somma Lombardo in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Somma Lombardo, you can refer to this Hourly UV Index in Somma Lombardo.

Maximum UV Index Levels in Somma Lombardo for September

The chart shows the monthly maximum UV Index (UVI) for Somma Lombardo 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. In September, the maximum UV index in Somma Lombardo typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: Somma Lombardo 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.

How September Weather in Somma Lombardo Compares to Other Months

Weather in Somma Lombardo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Somma Lombardo, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Somma Lombardo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)51 mm (2.0 inches)88%low
February Weather7°C (44°F)46 mm (1.8 inches)81%moderate
March Weather9°C (49°F)93 mm (3.7 inches)76%moderate
April Weather13°C (56°F)127 mm (5.0 inches)77%high
May Weather17°C (63°F)140 mm (5.5 inches)74%very high
June Weather22°C (72°F)155 mm (6.1 inches)71%very high
July Weather24°C (75°F)127 mm (5.0 inches)67%very high
August Weather24°C (75°F)108 mm (4.3 inches)64%very high
September Weather19°C (67°F)122 mm (4.8 inches)74%high
October Weather14°C (58°F)214 mm (8.4 inches)87%moderate
November Weather9°C (49°F)180 mm (7.1 inches)88%moderate
December Weather5°C (41°F)94 mm (3.7 inches)85%low

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