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September Weather in Hvittingfoss, Norway

Last updated: August 27, 2025

In September, the average temperature in Hvittingfoss, Norway hovers around 12°C (53°F), with nighttime lows dipping to a chilly 0°C (33°F) and daytime highs reaching a pleasant 25°C (77°F). Prepare for a bit of wet weather, as 134 mm (5.3 in) of precipitation may fall over the course of 14 days, contributing to an average humidity level of 86%.

September Temperature in Hvittingfoss

In September in Hvittingfoss, the average temperature is 12°C (53°F). Maximum temperatures can reach up to 25°C (77°F), while minimum temperatures can drop as low as 0°C (33°F). This makes it a perfect time to explore the outdoors, offering a pleasant climate for various activities.

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

The chart illustrates September temperature patterns in Hvittingfoss, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hvittingfoss, September typically has an average temperature of 12°C (53°F), with highs reaching up to 25°C (77°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec282833415160636053443628
Data source: Temperature data for Hvittingfoss 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 Hvittingfoss

In Hvittingfoss in September, the total precipitation amount is 134 mm (5.3 in) over the course of 14 days.

September Precipitation Trends in Hvittingfoss

The chart displays monthly precipitation patterns in Hvittingfoss, 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 Hvittingfoss, September typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec758081439210511598134148119131
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hvittingfoss

In Hvittingfoss in September humidity is 86%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting the need for warm, layered clothing while exploring the surroundings.

September Average Humidity in Hvittingfoss

This chart illustrates the average monthly humidity levels in Hvittingfoss, 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 Hvittingfoss 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 Hvittingfoss

In Hvittingfoss 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 Hvittingfoss for better planning.

Maximum UV Index Levels in Hvittingfoss for September

The chart shows the monthly maximum UV Index (UVI) for Hvittingfoss 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 Hvittingfoss typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457754211
Data source: Hvittingfoss 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 Hvittingfoss Compares to Other Months

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

This table compares monthly weather conditions in Hvittingfoss, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)75 mm (2.9 inches)93%low
February Weather-2°C (28°F)80 mm (3.1 inches)91%low
March Weather1°C (33°F)80 mm (3.2 inches)88%moderate
April Weather5°C (41°F)43 mm (1.7 inches)83%moderate
May Weather10°C (51°F)92 mm (3.6 inches)75%moderate
June Weather16°C (60°F)105 mm (4.2 inches)74%high
July Weather17°C (63°F)114 mm (4.5 inches)74%high
August Weather15°C (60°F)98 mm (3.9 inches)78%moderate
September Weather12°C (53°F)134 mm (5.3 inches)86%moderate
October Weather7°C (44°F)148 mm (5.8 inches)92%low
November Weather2°C (36°F)119 mm (4.7 inches)92%low
December Weather-2°C (29°F)131 mm (5.1 inches)92%low

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