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September Weather in Ytternaes, Sweden

Last updated: August 27, 2025

In September, the average temperature in Ytternaes, Sweden hovers around 12°C (54°F). Expect a minimum chill of -1°C (30°F) and a pleasant maximum of 26°C (79°F). Be prepared for some rain, as 54 mm (2.1 in) of precipitation is spread across 9 days. With an average humidity of 83%, you'll feel the crispness in the air!

September Temperature in Ytternaes

In September in Ytternaes, the average temperature is 12°C (54°F). Maximum temperatures can reach 26°C (79°F), while the minimum can dip as low as -1°C (30°F). This variation makes it essential to pack layers for your travels to Ytternaes during this month.

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

The chart illustrates September temperature patterns in Ytternaes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ytternaes, September typically has an average temperature of 12°C (54°F), with highs reaching up to 26°C (79°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec302934415162646254453832
Data source: Temperature data for Ytternaes 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 Ytternaes

In Ytternaes in September, the precipitation amount is 54 mm (2.1 in) over a span of 9 days.

September Precipitation Trends in Ytternaes

The chart displays monthly precipitation patterns in Ytternaes, 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 Ytternaes, September typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec343139306061637154714255
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ytternaes

In Ytternaes 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 Ytternaes

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

In Ytternaes 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 Ytternaes for better planning.

Maximum UV Index Levels in Ytternaes for September

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

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

This table compares monthly weather conditions in Ytternaes, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)34 mm (1.3 inches)91%low
February Weather-1°C (30°F)31 mm (1.2 inches)89%low
March Weather1°C (34°F)39 mm (1.5 inches)88%moderate
April Weather5°C (41°F)29 mm (1.2 inches)82%moderate
May Weather10°C (51°F)59 mm (2.3 inches)71%moderate
June Weather17°C (62°F)61 mm (2.4 inches)69%high
July Weather18°C (64°F)63 mm (2.5 inches)67%high
August Weather16°C (62°F)71 mm (2.8 inches)72%moderate
September Weather12°C (54°F)54 mm (2.1 inches)83%moderate
October Weather7°C (46°F)71 mm (2.8 inches)89%low
November Weather3°C (38°F)42 mm (1.7 inches)91%low
December Weather0°C (32°F)55 mm (2.2 inches)90%low

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