Last updated: August 27, 2025
In December, the average temperature in Spilsby, United Kingdom hovers around 5°C (42°F). You can expect minimum temperatures to dip as low as -3°C (27°F), while the maximum can reach a comfortable 15°C (59°F). The region sees an average precipitation of 71 mm (2.8 in) over about 14 days, accompanied by a high average humidity level of 88%.
In December in Spilsby, the average temperature is 5°C (42°F). Maximums can reach 15°C (59°F), while minimums can drop as low as -3°C (27°F). Be prepared for a mix of cool and mild weather if you're planning to travel during this time.
In Spilsby in December, the precipitation amount is 71 mm (2.8 in) over a duration of 14 days.
In Spilsby in December humidity is 88%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less appealing and leading you to seek warmth indoors instead.
In Spilsby 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 Spilsby.
UV Risk Categories
Weather in Spilsby varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Spilsby, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (40°F) | 44 mm (1.7 inches) | 89% | low |
| February Weather | 6°C (42°F) | 60 mm (2.3 inches) | 87% | low |
| March Weather | 7°C (45°F) | 57 mm (2.2 inches) | 86% | moderate |
| April Weather | 9°C (48°F) | 33 mm (1.3 inches) | 85% | moderate |
| May Weather | 12°C (54°F) | 72 mm (2.8 inches) | 83% | high |
| June Weather | 15°C (60°F) | 80 mm (3.2 inches) | 83% | very high |
| July Weather | 17°C (64°F) | 77 mm (3.0 inches) | 79% | very high |
| August Weather | 17°C (63°F) | 80 mm (3.2 inches) | 78% | high |
| September Weather | 15°C (58°F) | 64 mm (2.5 inches) | 84% | moderate |
| October Weather | 11°C (53°F) | 78 mm (3.1 inches) | 88% | moderate |
| November Weather | 8°C (46°F) | 60 mm (2.3 inches) | 89% | low |
| December Weather | 5°C (42°F) | 71 mm (2.8 inches) | 88% | low |