Last updated: August 27, 2025
In December, the average temperature in Sleaford, United Kingdom hovers around 6°C (42°F), with a minimum of -3°C (26°F) and a maximum reaching 15°C (59°F). Expect 75 mm (2.9 in) of precipitation spread over 15 days, contributing to a notably high average humidity of 90%.
In December in Sleaford, the average temperature is 6°C (42°F), with maximums reaching 15°C (59°F) and minimums dropping to as low as -3°C (26°F). Be prepared for a chilly climate and pack accordingly to ensure a comfortable travel experience.
In Sleaford in December, the precipitation amount is 75 mm (2.9 in) over a span of 15 days.
In Sleaford in December, humidity is 90%. With an average temperature of 6°C (42°F), this humidity feels like a heavy blanket wrapping around you, making every step feel more laborious and causing your clothes to cling uncomfortably, which can be quite challenging for traveling.
In Sleaford 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 Sleaford.
UV Risk Categories
Weather in Sleaford varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sleaford, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (41°F) | 46 mm (1.8 inches) | 90% | low |
| February Weather | 6°C (43°F) | 58 mm (2.3 inches) | 88% | low |
| March Weather | 7°C (45°F) | 60 mm (2.4 inches) | 86% | moderate |
| April Weather | 9°C (48°F) | 36 mm (1.4 inches) | 84% | moderate |
| May Weather | 12°C (54°F) | 71 mm (2.8 inches) | 80% | high |
| June Weather | 16°C (61°F) | 80 mm (3.2 inches) | 81% | very high |
| July Weather | 18°C (64°F) | 72 mm (2.9 inches) | 76% | very high |
| August Weather | 17°C (63°F) | 81 mm (3.2 inches) | 77% | high |
| September Weather | 15°C (59°F) | 59 mm (2.3 inches) | 85% | moderate |
| October Weather | 11°C (53°F) | 78 mm (3.1 inches) | 90% | moderate |
| November Weather | 8°C (46°F) | 57 mm (2.2 inches) | 92% | low |
| December Weather | 6°C (42°F) | 75 mm (2.9 inches) | 90% | low |