September Weather in THorlakshoefn, Iceland

Last updated: August 23, 2025

In September, the average temperature in THorlakshoefn, Iceland hovers around 9°C (48°F). Expect a chilly minimum of 2°C (35°F) and a mild maximum of 13°C (57°F). Rain is common, with an average precipitation of 214 mm (8.4 in) spread over 21 days, resulting in a damp atmosphere. Be prepared for the high average humidity of 87%, making it feel even cooler!

September Temperature in THorlakshoefn

In September in THorlakshoefn, the average temperature is 9°C (48°F), with maximums reaching 13°C (57°F) and minimums dropping to as low as 2°C (35°F). It's a great time for travelers to enjoy the crisp cool air while exploring the sights and sounds of THorlakshoefn.

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

The chart illustrates September temperature patterns in THorlakshoefn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In THorlakshoefn, September typically has an average temperature of 9°C (48°F), with highs reaching up to 13°C (57°F) and lows dropping to around 2°C (35°F).

Data source: Temperature data for THorlakshoefn generated using information from the Copernicus Climate Change Service.

September Precipitation in THorlakshoefn

In THorlakshoefn in September, the precipitation amount is 214 mm (8.4 in) over a span of 21 days.

September Precipitation Trends in THorlakshoefn

The chart displays monthly precipitation patterns in THorlakshoefn, 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 THorlakshoefn, September typically receives around 214 mm (8.4 inches) of precipitation spread over approximately 21 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in THorlakshoefn

In THorlakshoefn in September humidity is 87%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration uncomfortable and requiring extra layers and careful planning for any activities.

September Average Humidity in THorlakshoefn

This chart illustrates the average monthly humidity levels in THorlakshoefn, 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 THorlakshoefn is approximately 87%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in THorlakshoefn

In THorlakshoefn 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 THorlakshoefn, you can check the information here.

Maximum UV Index Levels in THorlakshoefn for September

The chart shows the monthly maximum UV Index (UVI) for THorlakshoefn 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 THorlakshoefn typically reaches 3, which falls under the moderate exposure category.

Data source: THorlakshoefn 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 THorlakshoefn Compares to Other Months

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

This table compares monthly weather conditions in THorlakshoefn, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	158 mm (6.2 inches)	84%	low
February Weather	2°C (36°F)	184 mm (7.2 inches)	82%	low
March Weather	2°C (37°F)	137 mm (5.4 inches)	85%	low
April Weather	5°C (40°F)	167 mm (6.6 inches)	81%	moderate
May Weather	7°C (44°F)	147 mm (5.8 inches)	83%	moderate
June Weather	9°C (49°F)	104 mm (4.1 inches)	82%	high
July Weather	11°C (52°F)	108 mm (4.2 inches)	86%	high
August Weather	11°C (52°F)	120 mm (4.7 inches)	87%	moderate
September Weather	9°C (48°F)	214 mm (8.4 inches)	87%	moderate
October Weather	6°C (44°F)	154 mm (6.1 inches)	88%	low
November Weather	4°C (39°F)	153 mm (6.0 inches)	85%	low
December Weather	2°C (37°F)	165 mm (6.5 inches)	84%	low