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December Weather in Heby, Sweden

Last updated: August 27, 2025

In December, the average temperature in Heby, Sweden hovers around -1°C (31°F), with nighttime lows plummeting to a chilling -20°C (-3°F) and daytime highs reaching a mild 9°C (48°F). Expect 54 mm (2.1 in) of precipitation spread across 12 days, creating a rather damp atmosphere. Coupled with an average humidity of 90%, this month offers a uniquely crisp and invigorating experience for locals and visitors alike.

December Temperature in Heby

In December, in Heby, the average temperature is -1°C (31°F). The maximum can reach 9°C (48°F), while the minimum can drop as low as -20°C (-3°F). Be sure to pack warm clothing if you plan to visit during this time.

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

The chart illustrates December 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, December typically has an average temperature of -1°C (31°F), with highs reaching up to 9°C (48°F) and lows dropping to around -20°C (-3°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.

December Precipitation in Heby

In Heby in December, the total precipitation amount is 54 mm (2.1 in) spread over a period of 12 days.

December Precipitation Trends in Heby

The chart displays monthly precipitation patterns in Heby, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Heby, December typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec353138315767677756774754
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Heby

In Heby in December humidity is 90%. With an average temperature of -1°C (31°F), this humidity feels like an icy blanket wrapping around you, making travel uncomfortable as the damp air seeps into your clothes, chilling you to the bone with every step you take.

December Average Humidity in Heby

This chart illustrates the average monthly humidity levels in Heby, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Heby is approximately 90%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Heby

In Heby in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Heby.

Maximum UV Index Levels in Heby for December

The chart shows the monthly maximum UV Index (UVI) for Heby in December, 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 December, the maximum UV index in Heby typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457754211
Data source: Heby December 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 December 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 December’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 December’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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