Last updated: August 23, 2025
In December, the average temperature in Jaervelae, Finland hovers around -2°C (29°F). However, be prepared for extremes: temperatures can plummet to a chilling -20°C (-4°F) or rise up to 6°C (43°F). With 70 mm (2.8 in) of precipitation spread over 15 days, wet weather is to be expected. The air is notably humid, with an average humidity of 96%, making it feel even cooler—so bundle up and prepare for some frosty days!
In December in Jaervelae, the average temperature is -2°C (29°F), with maximums reaching 6°C (43°F) and minimums dipping as low as -20°C (-4°F). It's advisable to dress warmly and prepare for cold conditions if you're planning to travel during this time.
In Jaervelae in December, the total precipitation amount reaches 70 mm (2.8 in) over the course of 15 days.
In Jaervelae in December humidity is 96%. With an average temperature of -2°C (29°F), this humidity feels like a biting chill that penetrates through layers of clothing, making travel outside quite uncomfortable and forcing visitors to seek refuge indoors or bundle up tightly before venturing out.
In Jaervelae 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 Jaervelae.
UV Risk Categories
Weather in Jaervelae varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Jaervelae, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 51 mm (2.0 inches) | 98% | low |
| February Weather | -4°C (24°F) | 45 mm (1.8 inches) | 96% | low |
| March Weather | -1°C (30°F) | 47 mm (1.8 inches) | 93% | moderate |
| April Weather | 4°C (39°F) | 47 mm (1.8 inches) | 87% | moderate |
| May Weather | 10°C (51°F) | 54 mm (2.1 inches) | 75% | moderate |
| June Weather | 16°C (62°F) | 62 mm (2.4 inches) | 74% | high |
| July Weather | 17°C (64°F) | 77 mm (3.0 inches) | 80% | high |
| August Weather | 16°C (61°F) | 75 mm (3.0 inches) | 85% | moderate |
| September Weather | 11°C (52°F) | 63 mm (2.5 inches) | 90% | moderate |
| October Weather | 6°C (43°F) | 79 mm (3.1 inches) | 94% | low |
| November Weather | 2°C (36°F) | 53 mm (2.1 inches) | 94% | low |
| December Weather | -2°C (29°F) | 70 mm (2.8 inches) | 96% | low |