December Weather in Horsham, United Kingdom

Last updated: March 17, 2025

In Horsham, United Kingdom, December brings a crisp chill to the air, with temperatures averaging around 7°C (45°F), peaking at a maximum of 14°C (58°F) and occasionally dipping to a brisk -3°C (26°F). The month typically sees 97 mm (3.8 in) of rainfall spread across 15 wet days, contributing to a damp ambiance with humidity levels soaring to 92%. While the cold might deter some, the charm of winter's embrace makes December a unique time to explore this quaint town, where cozy indoor settings and festive gatherings warm the spirit amidst the seasonal gloom.

December Temperature in Horsham

In December, Horsham, United Kingdom experiences a noticeable chill as winter settles in. With temperatures ranging from a minimum of -3°C (26°F) to a maximum of 14°C (58°F), the month serves as a transition into the colder season. The average temperature hovers around 7°C (45°F), marking a subtle decline compared to the milder months preceding it. This pattern showcases the shift from the crisp fall air to the frosty winter climate, as days grow shorter and the nights become colder. While the temperatures dip, the festive spirit of the holiday season infuses the town with warmth, making December a unique blend of cold weather and community cheer.

December Weather in Horsham: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Horsham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414346495561646359544744
Data source: Temperature data for Horsham generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Horsham

In December, Horsham experiences its wettest month of the year, with a striking 97 mm (3.8 in) of precipitation, signaling the onset of winter. This surge in rainfall is accompanied by 15 days of wet weather, making it a time when residents can expect more frequent downpours. The increase in precipitation stands out against the year's trend, especially when compared to the preceding months; for instance, November saw 65 mm of rain over 12 days, while October had 91 mm over 14 days. As the year wraps up, December's consistent showers not only contribute to the annual totals but also set a cozy, if soggy, atmosphere for the holiday season in Horsham.

December Precipitation Trends in Horsham

The chart displays monthly precipitation patterns in Horsham, with values for each month alongside December's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec545757346271576750916597
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Horsham

As December settles in Horsham, the air becomes noticeably heavy with humidity levels soaring to 92%, mirroring the dampness of the preceding months. This trend reflects a seasonal pattern where the winter months, particularly from November to January, showcase consistently high humidity, peaking at 92% in both November and December. In contrast, the summer months reveal a significant drop, with July recording the lowest humidity at 71%. As the year progresses, it’s evident that Horsham experiences a stark transition from the drier summer air to the moist, chilly atmosphere typical of late autumn and winter, influencing both the climate and the daily experiences of its residents.

December Average Humidity in Horsham

This chart illustrates the average monthly humidity levels in Horsham, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%79%81%71%76%82%91%92%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Horsham

In Horsham, United Kingdom, the December UV Index reflects a consistent trend seen throughout the colder months, with a low rating of 1. During this time, the risk of harm from unprotected sun exposure is minimal, allowing for a comfortable burn time of up to 45 minutes. As the year progresses, you can observe a shift from low levels in winter months like January and February, gradually increasing to very high levels in the summer. This seasonal variation highlights the importance of being mindful of UV exposure even in the winter. For more detailed insights, check out the Horsham UV Index.

Maximum UV Index Levels in Horsham for December

The chart shows the monthly maximum UV Index (UVI) for Horsham in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Horsham December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Horsham

In Horsham, December holds a modest charm with 112 hours of sunshine, a gradual decline as the year draws to a close. This month stands in contrast to the sun-drenched peak of May, boasting a remarkable 405 hours. As the seasons shift from the vibrant bloom of spring to the chill of winter, the trend reveals a fascinating journey through light, with sunshine steadily increasing from a mere 99 hours in January to its summer zenith in July, where it shines for 408 hours. After the summer solstice, the daylight begins to wane, encapsulating the story of the year—a dance between vibrant light and long shadows, with December providing a gentle reminder of the cozy warmth that sunshine once brought.

Monthly Sunshine Duration in Horsham: December Highlighted

The December sunshine duration represents the total number of hours Horsham experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec99h148h209h326h405h396h408h375h309h244h149h112h
Data source: Horsham December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Horsham During December

In Horsham, the prospect of sunny weather in December appears rather dim, with a mere 20% chance of sunshine gracing the skies. This marks a notable decline from the relatively higher probability of sunnier days in the earlier months, such as April at 55% or even March with 37%. As the year draws to a close, the likelihood of overcast skies increases, reflecting a broader trend of diminishing sunshine that starts in the autumn. December's cool, often gray climate serves as a reminder that while summer might be filled with more cheerful rays, winter in Horsham tends to be less inviting, leaving residents with an average of just a few sunlit moments amidst the chill.

Percentage of Sunny Days in December in Horsham

The chart illustrates the percentage of sunny days in Horsham throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Horsham experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%26%37%55%38%30%40%32%34%28%35%20%
Data source: Horsham December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Horsham in December

In Horsham, United Kingdom, December brings the year to a close with the shortest daylight duration, featuring just 7 hours of sunlight. This decrease reflects the gradual loss of daylight characteristic of the late autumn and early winter months, following the peak of 16 hours in June. As the year progresses, sunlight in Horsham diminishes from 15 hours in May to this year-end low, marked by a notable dip in November, which sees 8 hours. Overall, the pattern clearly showcases nature's cycle, with each month gracefully transitioning from the vibrant brightness of summer to the subdued glow of winter, reminding us of the ever-changing rhythm of time.

Average Daylight Hours in Horsham for December

The chart illustrates the variation in daylight duration in Horsham throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 28m10h11h 55m13h 52m15h 34m16h 27m15h 59m14h 27m12h 34m10h 38m8h 53m7h 58m
Data source: Horsham daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Horsham

In Horsham, United Kingdom, December ushers in a notable wind pattern, with an average wind speed of 4.9 m/s (11 mph), marking a seasonal consistency with the speeds from both October and May. As the year progresses, wind speeds appear to fluctuate, peaking in February at 5.3 m/s (12 mph) before tapering down to a minimum of 3.2 m/s (7 mph) in June and July. Notably, the colder months of late autumn and early winter maintain a steadier wind flow, suggesting that while the temperatures drop, the breezy conditions persist, making December a month where the winds seem to echo the year's brisk return to colder climates. Overall, the data reveals a dynamic interplay of winds throughout the year, with December standing out for its brisk yet familiar gusts.

Average December Wind Speed in Horsham

The chart displays monthly wind speed patterns in Horsham, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.85.34.83.84.83.23.74.23.64.94.04.9 m/s
Data source: Horsham December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Horsham Compares to Other Months

The weather in Horsham changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Horsham and find detailed weather information for every month.

December and January in Horsham showcase a gradual transition in weather patterns. December tends to be slightly warmer with an average temperature of 7°C (45°F), while January averages a cooler 5°C (42°F). Both months experience similar maximum temperatures, but December’s minimum temperature is a touch milder at -3°C (26°F) compared to January's -4°C (24°F). Precipitation is more frequent in December, with 97 mm (3.8 in) falling over 15 days, whereas January sees less rainfall, totaling 54 mm (2.1 in) across 10 days. Despite these differences, the overall humidity remains relatively high, at 92% in December and 91% in January. For more detailed insights on January weather, visit Horsham weather in January.

December tends to be slightly milder than February, with average temperatures ranging from a minimum of -3°C (26°F) to a maximum of 14°C (58°F), compared to February's range of -5°C (23°F) to 16°C (62°F). Additionally, December experiences higher precipitation, with 97 mm (3.8 in) of rain over 15 days, whereas February sees only 57 mm (2.2 in) across 11 days. Despite the chillier temperatures in February, both months maintain a high level of humidity, with December at 92% and February slightly lower at 89%. For more detailed information, you can visit Horsham weather in February.

In December, temperatures typically range from a chilly -3°C (26°F) to a milder 14°C (58°F), with an average of 7°C (45°F). The month experiences considerable precipitation, totaling 97 mm (3.8 in) over approximately 15 days, accompanied by high humidity levels at 92%. In contrast, March brings slightly colder minimum temperatures of -6°C (22°F) and a warmer maximum of 19°C (67°F), resulting in an average temperature of 8°C (46°F). Precipitation is significantly lower at 57 mm (2.2 in) over about 13 days, with humidity decreasing to 86%. For a more detailed look at March weather, visit Horsham weather in March.

December and April present distinct contrasts in weather. In December, temperatures range from a chilly -3°C (26°F) at their lowest to a mild 14°C (58°F) at their peak, averaging around 7°C (45°F). This month is also characterized by significant precipitation of 97 mm (3.8 in) over approximately 15 days, contributing to an average humidity of 92%. In comparison, April experiences slightly warmer temperatures, with a minimum of -2°C (29°F) and a maximum of 23°C (73°F), culminating in an average of 10°C (49°F). Precipitation drops to 34 mm (1.3 in) across 8 days, along with lower humidity at 85%. For more insights into April weather, visit Horsham weather in April.

December and May present distinctly different weather patterns. In December, temperatures range from a chilly -3°C (26°F) at their lowest to a mild 14°C (58°F) at their peak, with an average of 7°C (45°F). The month is characterized by high humidity at 92% and significant precipitation, totaling 97 mm (3.8 in) over about 15 days. In contrast, May brings more warmth, with minimum temperatures of 1°C (34°F), averages hitting 13°C (55°F), and maxima reaching 25°C (77°F). This month sees less precipitation, only 62 mm (2.4 in) across approximately 11 days, and a more moderate humidity level at 79%. For more details about weather in May, you can check Horsham weather in May.

In December, the weather is characterized by colder temperatures, with a minimum of -3°C (26°F) and an average of 7°C (45°F), peaking at 14°C (58°F). The month sees significant precipitation, averaging 97 mm (3.8 in) spread over 15 days, and a high humidity level of 92%. In contrast, June boasts much warmer temperatures, with a minimum of 7°C (45°F), an average of 16°C (61°F), and a maximum reaching 30°C (86°F). Precipitation in June is lower at 71 mm (2.8 in) over just 8 days, accompanied by a moderate humidity of 80%. For more detailed weather information, you can visit Horsham weather in June.

December and July present stark contrasts in weather. In December, temperatures range from a chilling -3°C (26°F) at night to a mild 14°C (58°F) during the day, with an average of 7°C (45°F). The month sees significant precipitation, totaling 97 mm (3.8 in) over about 15 days, along with high humidity at 92%. In contrast, July boasts a much warmer climate, with nighttime temperatures seldom dropping below 9°C (48°F) and daytime highs reaching up to 33°C (92°F). The average temperature sits at a comfortable 18°C (65°F), accompanied by lighter rainfall of 57 mm (2.2 in) over 11 days and lower humidity at 71%. For more details on the weather in July, you can check Horsham weather in July.

When comparing the weather in December and August, it's clear that they present contrasting climates. December experiences much colder temperatures, with a minimum of -3°C (26°F) and an average of 7°C (45°F), peaking at 14°C (58°F). This month also sees significant precipitation, totaling 97 mm (3.8 in) over approximately 15 days, resulting in a high humidity of 92%. In contrast, August is much warmer, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 32°C (89°F), and an average of 17°C (64°F). Precipitation is lower in August at 67 mm (2.6 in) over 11 days, accompanied by a more comfortable humidity level of 76%. For more detailed information on the summer climate, you can visit Horsham weather in August.

When comparing the weather in December to September, a stark contrast emerges. December typically features colder temperatures, with a minimum of -3°C (26°F) and an average of 7°C (45°F), while September enjoys milder conditions, with temperatures ranging from a minimum of 3°C (37°F) to an average of 15°C (60°F) and a maximum of 27°C (81°F). Precipitation is more prevalent in December, accumulating to 97 mm (3.8 in) over about 15 days, compared to September's 50 mm (2.0 in) spread across 9 days. Furthermore, December's humidity is notably higher at 92%, compared to 82% in September. For a detailed look at what to expect, you can check Horsham weather in September.

In comparing the weather between December and October, December tends to be colder with temperatures ranging from a minimum of -3°C (26°F) to a maximum of 14°C (58°F), while October has a milder range of 2°C (36°F) to 21°C (70°F). Additionally, December experiences slightly more precipitation at 97 mm (3.8 in) over 15 days, compared to October's 91 mm (3.6 in) over 14 days. The humidity levels are also higher in December at 92%, compared to 90% in October, contributing to a noticeably chillier feel. For more detailed information, you can check the Horsham weather in October.

December weather in Horsham tends to be slightly cooler than November, with average temperatures ranging from a minimum of -3°C (26°F) to a maximum of 14°C (58°F), compared to November's temperatures of -2°C (29°F) to 16°C (62°F). Additionally, December experiences more precipitation, totaling 97 mm (3.8 in) over 15 days, while November has less at 65 mm (2.6 in) across 12 days. Both months share a high humidity level of 92%, creating a damp atmosphere as winter sets in. For more detailed insights on November's weather, you can refer to Horsham weather in November.

Compare Horsham's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Horsham

As December graces Horsham, winter firmly establishes its presence with cool temperatures, averaging around 7°C. Unlike the milder months that precede it, this month experiences a significant drop, featuring chilly days and occasional frost. Precipitation becomes more frequent, with about half the month seeing rain, leading to a humid environment that can feel quite damp. This blend of wintry conditions makes December distinct from other months, as the landscape transforms into a tranquil, frosty scene. For more insights on Horsham's year-round weather patterns, don’t miss out on our detailed page on Horsham Climate.