Last updated: August 23, 2025
In December, the average temperature in Hellissandur, Iceland hovers around 3°C (37°F). Expect chilly nights with a minimum of -4°C (24°F) and mild days peaking at 9°C (48°F). This month brings 92 mm (3.6 in) of precipitation over 17 days, resulting in a high average humidity of 87%. Be prepared for damp conditions while enjoying the cool, crisp air!
In December in Hellissandur, the average temperature is 3°C (37°F). The maximum can reach 9°C (48°F), while the minimum can drop as low as -4°C (24°F). Be prepared for chilly weather and dress in layers if you're planning to travel during this time.
In Hellissandur in December, the precipitation amount is 92 mm (3.6 in) spread over 17 days.
In Hellissandur in December, humidity is 87%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating proper layers to stay warm while navigating the wet conditions.
In Hellissandur in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Hellissandur.
UV Risk Categories
Weather in Hellissandur varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hellissandur, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (35°F) | 103 mm (4.1 inches) | 89% | low |
| February Weather | 2°C (35°F) | 113 mm (4.5 inches) | 89% | low |
| March Weather | 2°C (35°F) | 94 mm (3.7 inches) | 90% | low |
| April Weather | 4°C (39°F) | 107 mm (4.2 inches) | 86% | moderate |
| May Weather | 6°C (42°F) | 81 mm (3.2 inches) | 87% | moderate |
| June Weather | 8°C (47°F) | 63 mm (2.5 inches) | 85% | moderate |
| July Weather | 10°C (50°F) | 70 mm (2.8 inches) | 88% | moderate |
| August Weather | 10°C (51°F) | 69 mm (2.7 inches) | 88% | moderate |
| September Weather | 9°C (48°F) | 149 mm (5.9 inches) | 89% | moderate |
| October Weather | 6°C (43°F) | 102 mm (4.0 inches) | 88% | low |
| November Weather | 4°C (39°F) | 93 mm (3.6 inches) | 87% | low |
| December Weather | 3°C (37°F) | 92 mm (3.6 inches) | 87% | low |