Last updated: August 23, 2025
In December, the average temperature in Ruhnu, Estonia hovers around 3°C (37°F). Expect a chilling minimum of -8°C (18°F) and a milder maximum of 9°C (48°F). The region experiences 64 mm (2.5 in) of precipitation over approximately 17 days, contributing to a notably high average humidity of 93%.
In December in Ruhnu, the average temperature is 3°C (37°F). Maximums can reach 9°C (48°F), while minimums can be as low as -8°C (18°F). It’s a chilly time to visit, so be sure to pack warm clothing and prepare for cold weather activities.
In Ruhnu in December, the precipitation amount is 64 mm (2.5 in) over the course of 17 days.
In Ruhnu in December humidity is 93%. With an average temperature of 3°C (37°F), this humidity feels like an oppressive chill clinging to your skin, making outdoor activities less enjoyable and travel uncomfortable as the dampness seeps into your clothes, leaving you feeling cold and clammy.
In Ruhnu 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 Ruhnu.
UV Risk Categories
Weather in Ruhnu varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ruhnu, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 48 mm (1.9 inches) | 93% | low |
| February Weather | 0°C (32°F) | 43 mm (1.7 inches) | 91% | low |
| March Weather | 1°C (34°F) | 47 mm (1.9 inches) | 90% | moderate |
| April Weather | 4°C (39°F) | 28 mm (1.1 inches) | 87% | moderate |
| May Weather | 9°C (48°F) | 35 mm (1.4 inches) | 72% | high |
| June Weather | 16°C (60°F) | 45 mm (1.8 inches) | 76% | high |
| July Weather | 18°C (65°F) | 77 mm (3.0 inches) | 76% | high |
| August Weather | 18°C (65°F) | 91 mm (3.6 inches) | 80% | high |
| September Weather | 15°C (59°F) | 92 mm (3.6 inches) | 87% | moderate |
| October Weather | 11°C (51°F) | 108 mm (4.2 inches) | 91% | low |
| November Weather | 7°C (44°F) | 87 mm (3.4 inches) | 92% | low |
| December Weather | 3°C (37°F) | 64 mm (2.5 inches) | 93% | low |