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September Weather in Robertsfors, Sweden

Last updated: August 27, 2025

In Robertsfors, Sweden, the average temperature in September is a crisp 9°C (49°F), with lows dipping to a chilly -3°C (27°F) and highs reaching a comfortable 19°C (67°F). Expect 73 mm (2.9 in) of precipitation spread over 10 days, resulting in an average humidity of 88%. Be prepared for a mix of weather as you explore this vibrant locale!

September Temperature in Robertsfors

In September in Robertsfors, the average temperature is 9°C (49°F). Maximum temperatures can reach 19°C (67°F), while the minimum can drop as low as -3°C (27°F). This weather makes it an ideal time for travelers to enjoy a mix of mild days and cool evenings, perfect for outdoor exploration.

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

The chart illustrates September temperature patterns in Robertsfors, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Robertsfors, September typically has an average temperature of 9°C (49°F), with highs reaching up to 19°C (67°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec212027354556615849393126
Data source: Temperature data for Robertsfors 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 Robertsfors

In Robertsfors in September, the precipitation amount is 73 mm (2.9 in) over the course of 10 days.

September Precipitation Trends in Robertsfors

The chart displays monthly precipitation patterns in Robertsfors, 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 Robertsfors, September typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec584945335158698173966483
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Robertsfors

In Robertsfors in September, humidity is 88%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to stay warm and dry.

September Average Humidity in Robertsfors

This chart illustrates the average monthly humidity levels in Robertsfors, 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 Robertsfors is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec97%95%90%84%82%78%82%84%88%92%93%96%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Robertsfors

In Robertsfors in September, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Robertsfors, you can check the information here.

Maximum UV Index Levels in Robertsfors for September

The chart shows the monthly maximum UV Index (UVI) for Robertsfors 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 Robertsfors typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112356653211
Data source: Robertsfors 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 Robertsfors Compares to Other Months

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

This table compares monthly weather conditions in Robertsfors, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)58 mm (2.3 inches)97%low
February Weather-7°C (20°F)49 mm (1.9 inches)95%low
March Weather-3°C (27°F)45 mm (1.8 inches)90%low
April Weather1°C (35°F)33 mm (1.3 inches)84%moderate
May Weather7°C (45°F)51 mm (2.0 inches)81%moderate
June Weather13°C (56°F)58 mm (2.3 inches)78%high
July Weather16°C (61°F)69 mm (2.7 inches)82%high
August Weather14°C (58°F)81 mm (3.2 inches)84%moderate
September Weather9°C (49°F)73 mm (2.9 inches)88%moderate
October Weather4°C (40°F)96 mm (3.8 inches)92%low
November Weather-1°C (31°F)64 mm (2.5 inches)93%low
December Weather-4°C (26°F)83 mm (3.3 inches)96%low

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