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September Weather in Hellissandur, Iceland

Last updated: August 23, 2025

In September, the average temperature in Hellissandur, Iceland hovers around 9°C (48°F), with a minimum of 3°C (37°F) and a maximum of 13°C (55°F). Expect rich precipitation of 149 mm (5.9 in) spread over 20 days, coupled with an average humidity level of 89%. Be prepared for a wet and chilly experience!

September Temperature in Hellissandur

In September in Hellissandur, the average temperature is 9°C (48°F). Maximums can reach 13°C (55°F), and minimums can drop to as low as 3°C (37°F). It's advisable to pack layers to stay comfortable during your travels.

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

The chart illustrates September temperature patterns in Hellissandur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hellissandur, September typically has an average temperature of 9°C (48°F), with highs reaching up to 13°C (55°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec353535394246505147433937
Data source: Temperature data for Hellissandur 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 Hellissandur

In Hellissandur in September, the precipitation amount reaches 149 mm (5.9 in) over the course of 20 days.

September Precipitation Trends in Hellissandur

The chart displays monthly precipitation patterns in Hellissandur, 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 Hellissandur, September typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec10311394107816370691491029392
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hellissandur

In Hellissandur in September humidity is 89%. With an average temperature of 9°C (48°F), this humidity feels like a chill that lingers in the air, wrapping around you like a damp blanket, making outdoor activities challenging and encouraging a cozy retreat indoors.

September Average Humidity in Hellissandur

This chart illustrates the average monthly humidity levels in Hellissandur, 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 Hellissandur is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%90%86%87%85%88%89%89%88%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hellissandur

In Hellissandur in September, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Hellissandur, you can check the information here.

Maximum UV Index Levels in Hellissandur for September

The chart shows the monthly maximum UV Index (UVI) for Hellissandur 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 Hellissandur typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112355543211
Data source: Hellissandur 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 Hellissandur Compares to Other Months

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

This table compares monthly weather conditions in Hellissandur, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)103 mm (4.1 inches)89%low
February Weather2°C (35°F)113 mm (4.5 inches)89%low
March Weather2°C (35°F)94 mm (3.7 inches)90%low
April Weather4°C (39°F)107 mm (4.2 inches)86%moderate
May Weather6°C (42°F)81 mm (3.2 inches)87%moderate
June Weather8°C (47°F)63 mm (2.5 inches)85%moderate
July Weather10°C (50°F)70 mm (2.8 inches)88%moderate
August Weather10°C (51°F)69 mm (2.7 inches)88%moderate
September Weather9°C (48°F)149 mm (5.9 inches)89%moderate
October Weather6°C (43°F)102 mm (4.0 inches)88%low
November Weather4°C (39°F)93 mm (3.6 inches)87%low
December Weather3°C (37°F)92 mm (3.6 inches)87%low

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