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September Weather in Jaernforsen, Sweden

Last updated: August 27, 2025

In Jaernforsen, Sweden during September, the average temperature hovers around 12°C (55°F), with lows dropping to -1°C (31°F) and highs peaking at 24°C (76°F). Expect around 66 mm (2.6 in) of precipitation over 10 days, accompanied by an average humidity of 81%. Prepare for a mix of cool temperatures and occasional rain!

September Temperature in Jaernforsen

In September in Jaernforsen, the average temperature is 12°C (55°F), with maximums reaching up to 24°C (76°F) and minimums dropping as low as -1°C (31°F). It's a great time to visit Jaernforsen for those who enjoy mild weather and the chance to experience a variety of temperatures throughout the day.

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

The chart illustrates September temperature patterns in Jaernforsen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jaernforsen, September typically has an average temperature of 12°C (55°F), with highs reaching up to 24°C (76°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec323135425162636154463933
Data source: Temperature data for Jaernforsen 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 Jaernforsen

In Jaernforsen in September, the precipitation amount is 66 mm (2.6 in) over the course of 10 days.

September Precipitation Trends in Jaernforsen

The chart displays monthly precipitation patterns in Jaernforsen, 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 Jaernforsen, September typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec384447305650707166684653
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Jaernforsen

In Jaernforsen in September humidity is 81%. With an average temperature of 12°C (55°F), this humidity feels like a damp blanket enveloping you, making outdoor activities feel heavier and encouraging frequent breaks to hydrate and cool off while traveling.

September Average Humidity in Jaernforsen

This chart illustrates the average monthly humidity levels in Jaernforsen, 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 Jaernforsen is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%88%82%72%68%68%73%81%87%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Jaernforsen

In Jaernforsen 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 Jaernforsen for better planning.

Maximum UV Index Levels in Jaernforsen for September

The chart shows the monthly maximum UV Index (UVI) for Jaernforsen 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 Jaernforsen typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123567764211
Data source: Jaernforsen 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 Jaernforsen Compares to Other Months

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

This table compares monthly weather conditions in Jaernforsen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)38 mm (1.5 inches)90%low
February Weather0°C (32°F)44 mm (1.7 inches)89%low
March Weather2°C (35°F)47 mm (1.9 inches)88%moderate
April Weather5°C (42°F)30 mm (1.2 inches)82%moderate
May Weather11°C (51°F)56 mm (2.2 inches)72%high
June Weather16°C (62°F)50 mm (2.0 inches)68%high
July Weather17°C (63°F)70 mm (2.8 inches)68%high
August Weather16°C (61°F)71 mm (2.8 inches)73%high
September Weather12°C (55°F)66 mm (2.6 inches)81%moderate
October Weather8°C (47°F)68 mm (2.7 inches)87%low
November Weather4°C (40°F)46 mm (1.8 inches)89%low
December Weather1°C (34°F)53 mm (2.1 inches)88%low

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