September Weather in Hoefn, Iceland

Last updated: August 23, 2025

In Hoefn, Iceland, the average temperature in September hovers around 8°C (46°F), with a range that can dip to a chilly 1°C (34°F) and peak at a mild 15°C (59°F). Expect rainy days as well, with total precipitation reaching 260 mm (10.2 in) spread over approximately 18 days. The air is often thick with moisture, resulting in an average humidity of 99%, making it a truly immersive experience in the elements.

September Temperature in Hoefn

In September in Hoefn, the average temperature is 8°C (46°F). The maximum can reach 15°C (59°F) and the minimum can be as low as 1°C (34°F). Pack accordingly to enjoy the mild weather while exploring all that Hoefn has to offer!

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

The chart illustrates September temperature patterns in Hoefn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hoefn, September typically has an average temperature of 8°C (46°F), with highs reaching up to 15°C (59°F) and lows dropping to around 1°C (34°F).

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

September Precipitation in Hoefn

In Hoefn in September, the precipitation amount is 260 mm (10.2 in) spread over 18 days, indicating a relatively wet period for the region.

September Precipitation Trends in Hoefn

The chart displays monthly precipitation patterns in Hoefn, 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 Hoefn, September typically receives around 260 mm (10.2 inches) of precipitation spread over approximately 18 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Hoefn

In Hoefn in September humidity is 99%. With an average temperature of 8°C (46°F), this humidity feels like a heavy blanket enveloping you, making every step feel sluggish and the air thick and almost suffocating, which can be quite challenging for traveling.

September Average Humidity in Hoefn

This chart illustrates the average monthly humidity levels in Hoefn, 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 Hoefn is approximately 99%, 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 Hoefn

In Hoefn 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 Hoefn for better planning.

Maximum UV Index Levels in Hoefn for September

The chart shows the monthly maximum UV Index (UVI) for Hoefn 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 Hoefn typically reaches 4, which falls under the moderate exposure category.

Data source: Hoefn 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 Hoefn Compares to Other Months

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

This table compares monthly weather conditions in Hoefn, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (33°F)	152 mm (6.0 inches)	97%	low
February Weather	1°C (34°F)	290 mm (11.4 inches)	97%	low
March Weather	1°C (35°F)	151 mm (5.9 inches)	97%	low
April Weather	3°C (37°F)	181 mm (7.1 inches)	93%	moderate
May Weather	5°C (41°F)	147 mm (5.8 inches)	92%	high
June Weather	8°C (46°F)	127 mm (5.0 inches)	96%	high
July Weather	10°C (50°F)	106 mm (4.2 inches)	102%	high
August Weather	9°C (49°F)	114 mm (4.5 inches)	102%	moderate
September Weather	8°C (46°F)	260 mm (10.2 inches)	99%	moderate
October Weather	5°C (41°F)	256 mm (10.1 inches)	99%	low
November Weather	2°C (36°F)	182 mm (7.2 inches)	97%	low
December Weather	1°C (34°F)	214 mm (8.4 inches)	97%	low