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September Weather in Lillesand, Norway

Last updated: August 27, 2025

In September, the average temperature in Lillesand, Norway hovers around 14°C (57°F). Expect a minimum of 4°C (40°F) and a comfortable maximum of 25°C (77°F). With 115 mm (4.5 in) of precipitation over about 14 days, paired with an average humidity of 86%, it's advisable to be prepared for the occasional shower.

September Temperature in Lillesand

In September in Lillesand, the average temperature is 14°C (57°F), with maximums reaching 25°C (77°F) and minimums dipping to 4°C (40°F). This mild climate makes Lillesand an ideal destination for travelers seeking comfortable weather.

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

The chart illustrates September temperature patterns in Lillesand, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lillesand, September typically has an average temperature of 14°C (57°F), with highs reaching up to 25°C (77°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec363538445261646257504338
Data source: Temperature data for Lillesand 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 Lillesand

In Lillesand in September, the precipitation amount is 115 mm (4.5 in) over the course of 14 days.

September Precipitation Trends in Lillesand

The chart displays monthly precipitation patterns in Lillesand, 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 Lillesand, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec811039838838888101115169128152
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lillesand

In Lillesand in September humidity is 86%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket enveloping you, making travel feel oppressive and uncomfortably sticky.

September Average Humidity in Lillesand

This chart illustrates the average monthly humidity levels in Lillesand, 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 Lillesand is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%91%88%83%75%74%74%78%86%92%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lillesand

In Lillesand in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Lillesand for better planning.

Maximum UV Index Levels in Lillesand for September

The chart shows the monthly maximum UV Index (UVI) for Lillesand 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 Lillesand typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123467764211
Data source: Lillesand 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 Lillesand Compares to Other Months

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

This table compares monthly weather conditions in Lillesand, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)81 mm (3.2 inches)93%low
February Weather2°C (35°F)103 mm (4.0 inches)91%low
March Weather3°C (38°F)97 mm (3.8 inches)88%moderate
April Weather6°C (44°F)38 mm (1.5 inches)83%moderate
May Weather11°C (52°F)83 mm (3.3 inches)75%high
June Weather16°C (61°F)88 mm (3.5 inches)74%high
July Weather18°C (64°F)88 mm (3.5 inches)74%high
August Weather16°C (62°F)101 mm (4.0 inches)78%high
September Weather14°C (57°F)115 mm (4.5 inches)86%moderate
October Weather10°C (50°F)169 mm (6.7 inches)92%low
November Weather6°C (43°F)128 mm (5.1 inches)92%low
December Weather3°C (38°F)152 mm (6.0 inches)92%low

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