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September Weather in Harbo, Sweden

Last updated: August 27, 2025

In September, the average temperature in Harbo, Sweden hovers around 12°C (54°F). You might experience a chilly minimum of -1°C (31°F) or a warm maximum of 26°C (78°F). Throughout the month, expect approximately 55 mm (2.2 in) of precipitation spread over 9 days, contributing to an average humidity level of 83%.

September Temperature in Harbo

In September in Harbo, the average temperature is 12°C (54°F). The maximum can reach 26°C (78°F), while the minimum can be as low as -1°C (31°F). This means travelers should be prepared for a wide range of temperatures, making layering essential for comfort.

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

The chart illustrates September temperature patterns in Harbo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harbo, September typically has an average temperature of 12°C (54°F), with highs reaching up to 26°C (78°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec292934415162646154453731
Data source: Temperature data for Harbo 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 Harbo

In Harbo in September, the precipitation amount is 55 mm (2.2 in) over a span of 9 days.

September Precipitation Trends in Harbo

The chart displays monthly precipitation patterns in Harbo, 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 Harbo, September typically receives around 55 mm (2.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec353138315964667355754454
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Harbo

In Harbo in September humidity is 83%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making outdoor exploration feel sticky and uncomfortable, which can dampen the excitement of traveling.

September Average Humidity in Harbo

This chart illustrates the average monthly humidity levels in Harbo, 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 Harbo is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%88%82%71%69%67%73%83%89%91%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Harbo

In Harbo 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 Harbo for better planning.

Maximum UV Index Levels in Harbo for September

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

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

This table compares monthly weather conditions in Harbo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)35 mm (1.4 inches)91%low
February Weather-2°C (29°F)31 mm (1.2 inches)89%low
March Weather1°C (34°F)38 mm (1.5 inches)88%moderate
April Weather5°C (41°F)31 mm (1.2 inches)82%moderate
May Weather10°C (51°F)59 mm (2.3 inches)71%moderate
June Weather16°C (62°F)64 mm (2.5 inches)69%high
July Weather18°C (64°F)66 mm (2.6 inches)67%high
August Weather16°C (62°F)73 mm (2.9 inches)72%moderate
September Weather12°C (54°F)55 mm (2.2 inches)83%moderate
October Weather7°C (45°F)75 mm (3.0 inches)89%low
November Weather3°C (38°F)44 mm (1.7 inches)91%low
December Weather0°C (32°F)54 mm (2.1 inches)90%low

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