Last updated: August 27, 2025
In December, the average temperature in Upplands Vaesby, Sweden hovers around 1°C (33°F). Expect a minimum of -16°C (3°F) and a maximum of 9°C (48°F). With an average precipitation of 59 mm (2.3 in) spread over 13 days, you’ll likely encounter some damp weather. Additionally, be prepared for a rather humid atmosphere, as average humidity levels reach a remarkable 87%.
In December in Upplands Vaesby, the average temperature is 1°C (33°F). Maximums can reach 9°C (48°F), and minimums can drop as low as -16°C (3°F). Be sure to pack warm clothing and prepare for chilly weather when visiting during this time.
In Upplands Vaesby in December, the precipitation amount is 59 mm (2.3 in) spread over 13 days.
In Upplands Vaesby in December, humidity is 87%. With an average temperature of 1°C (33°F), this humidity feels like a chilling blanket, making traveling uncomfortable as the cold air clings to your skin, amplifying the frosty bite and dampness that can quickly lead to a sense of unease.
In Upplands Vaesby 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 Upplands Vaesby.
UV Risk Categories
Weather in Upplands Vaesby varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Upplands Vaesby, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (31°F) | 35 mm (1.4 inches) | 90% | low |
| February Weather | -1°C (30°F) | 33 mm (1.3 inches) | 88% | low |
| March Weather | 1°C (35°F) | 41 mm (1.6 inches) | 89% | moderate |
| April Weather | 5°C (41°F) | 28 mm (1.1 inches) | 85% | moderate |
| May Weather | 10°C (51°F) | 55 mm (2.2 inches) | 77% | moderate |
| June Weather | 16°C (62°F) | 57 mm (2.2 inches) | 76% | high |
| July Weather | 18°C (64°F) | 59 mm (2.3 inches) | 74% | high |
| August Weather | 17°C (63°F) | 76 mm (3.0 inches) | 77% | moderate |
| September Weather | 13°C (55°F) | 50 mm (2.0 inches) | 85% | moderate |
| October Weather | 8°C (47°F) | 66 mm (2.6 inches) | 89% | low |
| November Weather | 4°C (39°F) | 42 mm (1.6 inches) | 90% | low |
| December Weather | 1°C (33°F) | 59 mm (2.3 inches) | 87% | low |