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September Weather in Heby, Sweden

Last updated: August 27, 2025

In Heby, Sweden, the average temperature in September hovers around 12°C (54°F). Expect a minimum chill of -1°C (30°F) and the possibility of warm spells reaching up to 24°C (76°F). During this month, precipitation tends to accumulate to about 56 mm (2.2 in) over 10 days, while the air carries an average humidity of 83%, making for a potentially damp atmosphere.

September Temperature in Heby

In September in Heby, the average temperature is 12°C (54°F), with maximums reaching 24°C (76°F) and minimums dropping as low as -1°C (30°F). This makes it essential to pack versatile clothing to accommodate both warm afternoons and chilly evenings during your travels.

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

The chart illustrates September temperature patterns in Heby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heby, September typically has an average temperature of 12°C (54°F), with highs reaching up to 24°C (76°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec292934415162646153453731
Data source: Temperature data for Heby 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 Heby

In Heby in September, the precipitation amount is 56 mm (2.2 in) over the course of 10 days.

September Precipitation Trends in Heby

The chart displays monthly precipitation patterns in Heby, 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 Heby, September typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec353138315767677756774754
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Heby

In Heby 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 Heby

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

In Heby 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 Heby for better planning.

Maximum UV Index Levels in Heby for September

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

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

This table compares monthly weather conditions in Heby, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°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 Weather11°C (51°F)57 mm (2.3 inches)71%moderate
June Weather17°C (62°F)67 mm (2.6 inches)69%high
July Weather18°C (64°F)67 mm (2.6 inches)67%high
August Weather16°C (61°F)77 mm (3.0 inches)72%moderate
September Weather12°C (54°F)56 mm (2.2 inches)83%moderate
October Weather7°C (45°F)77 mm (3.0 inches)89%low
November Weather3°C (37°F)47 mm (1.9 inches)91%low
December Weather-1°C (31°F)54 mm (2.1 inches)90%low

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