Last updated: March 17, 2025
December in Harrow on the Hill, United Kingdom unveils a season of contrasts, characterized by an average temperature of 6°C (44°F), with a maximum reaching 14°C (58°F) and dropping to a chilly -4°C (24°F) on the coldest days. The month witnesses 84 mm (3.3 in) of precipitation over 13 days, contributing to the region's 92% humidity, which envelops the area in a crisp, damp ambiance. As winter settles in, the blend of moderate temperatures and frequent showers paints a quintessentially British December, inviting both coziness indoors and brisk walks amidst the seasonal scenery.
December in Harrow on the Hill, United Kingdom, ushers in a chill that reflects the heart of winter, with temperatures dipping to a minimum of -4°C (24°F). Despite the brisk air, the average temperature sits at a modest 6°C (44°F), providing a stark contrast to the warmer months just passed. The maximum temperature during this month reaches 14°C (58°F), signaling the gradual descent into the cold season. As the year winds down, the temperature trends reveal a consistent drop from the milder autumn months, where the average has already started to slip. December's cold invites cozy gatherings and festive cheer, encapsulating the spirit of winter in this picturesque locale.
December in Harrow on the Hill showcases a significant uptick in precipitation, mirroring the wetter months seen earlier in the year. With 84 mm (3.3 in) of rainfall recorded, December matches the rainfall of October, indicating a consistent pattern of moisture as the year comes to a close. This month also experiences 13 rainy days, the highest number since March, ensuring a damp atmosphere typical of the winter season. The trend suggests that as temperatures drop, the region experiences a pronounced increase in precipitation, reinforcing the notion that December embodies the quintessential British winter with its steady drizzle and overcast skies.
In December, Harrow on the Hill, United Kingdom, experiences a notable spike in humidity, reaching 92%, which aligns closely with November’s humidity levels. This winter month signifies a notable increase from the drier summer months, as humidity steadily declines from 71% in July to 76% in August, before gradually rising again. As the year draws to a close, the persistent moisture in the air suggests a shift towards a damp and cool climate, characteristic of the region's winter. The trend highlights a significant contrast to the drier months earlier in the year, emphasizing the seasonal variations that make Harrow's weather both dynamic and complex.
In December, Harrow on the Hill experiences a low UV Index of 1, with a burn time of 45 minutes. This marks a continuation of the trend observed since the beginning of the year, with UV levels remaining consistently low in January and November as well. Following the summer months, where UV exposure peaked at very high levels (with an Index of 8 in both June and July), the transition to winter brings a reassuring ease for outdoor enthusiasts. As the days grow shorter and cooler, it's clear that December offers a safe environment for those looking to enjoy the season. For more information on UV levels throughout the year, visit Harrow on the Hill UV Index.
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In Harrow on the Hill, December brings a gentle decline in sunshine as the year draws to a close, with approximately 109 hours of daylight. This marks a notable dip from the vibrant summer months when sunshine peaks, with July basking in 404 hours of radiant light. As the seasons shift from the warmth of late spring and early summer, where May shines brightest at 398 hours, the shorter days of winter settle in. Interestingly, this December figure is somewhat reflective of November's 144 hours, hinting at the gradual transition into the winter solstice. While the town may be cloaked in shorter daylight, the crisp, cool air brings its own charm, inviting residents and visitors alike to enjoy the quieter beauty of the season.
In Harrow on the Hill, December tends to usher in a notable decline in sunny weather, with only a 17% likelihood of sunshine. This is part of a broader trend observed throughout the year, where the chance of sun generally peaks in the spring months, particularly in April with a resilient 49%. As autumn wanes, the chances of clear skies dip significantly, with December recording one of the lowest probabilities of sunshine. This pattern emphasizes the need for warm layers and cozy interiors, as residents prepare for the more overcast and chilly days characteristic of late fall and winter. Overall, while the holiday season may bring cheer, it's safe to say that eyeing the sun might lead to some disappointment in December.
As winter deepens in Harrow on the Hill, December brings the shortest daylight duration of the year, with only 7 hours of sunlight. This stark decline in daylight from the longer and brighter months of May and June, which boast up to 16 hours, illustrates the shifting patterns of the seasons. Following the gradual tapering off from November's 8 hours, the dark days of December create a cozy atmosphere, inviting residents to embrace indoor activities and festive celebrations. As the year concludes, daylight begins its slow return in January, marking a hopeful transition towards longer days ahead.
As winter approaches, December on Harrow on the Hill brings a brisk wind that picks up from the autumnal whispers of November. With an average wind speed of 4.4 m/s (10 mph), December mirrors the gusty conditions of both October and March, suggesting a seasonal uptick compared to the calmer summer months. Interestingly, this month stands out from the generally milder conditions experienced from June through August, where winds hovered around 3 m/s. As the landscape transforms and the festive season sets in, the invigorating December winds serve as a reminder of nature's transition, fostering a vibrant atmosphere perfect for brisk walks amidst the winter scenery.
The weather in Harrow on the Hill 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 Harrow on the Hill and find detailed weather information for every month.
December and January exhibit similar temperature ranges, with January experiencing slightly cooler temperatures. December has an average of 6°C (44°F), while January's average drops to 5°C (41°F). Both months can reach a maximum of 14°C (58°F), but January sees a minimal increase in nighttime lows, averaging -5°C (24°F) compared to December's -4°C (24°F). Precipitation patterns differ as well; December is wetter, with 84 mm (3.3 in) over 13 days, while January has 54 mm (2.1 in) over 10 days, indicating somewhat drier conditions. Humidity remains high throughout both months, with December at 92% and January at 91%. For more detailed insights, you can visit Harrow on the Hill weather in January.
December and February weather exhibit notable similarities and differences. December experiences slightly warmer temperatures, with averages around 6°C (44°F) and a maximum reaching 14°C (58°F), while February's temperatures hover at a minimum of -5°C (23°F) and can peak at 18°C (65°F). Precipitation is more abundant in December, totaling 84 mm (3.3 in) over 13 days, compared to February's 53 mm (2.1 in) across 11 days. Humidity levels are also high in both months, though December has a slightly elevated humidity rate of 92%, in contrast to February's 89%. For a detailed look at the weather conditions in February, you can visit Harrow on the Hill weather in February.
In comparing the weather between December and March, we see notable differences in temperature and precipitation. December typically experiences average temperatures ranging from a minimum of -4°C (24°F) to a maximum of 14°C (58°F), with an overall average of 6°C (44°F). In contrast, March has a slightly milder average temperature of 7°C (46°F), with low temperatures dipping to -5°C (23°F) and highs reaching 22°C (71°F). Precipitation in December is higher at 84 mm (3.3 in) compared to March's 54 mm (2.1 in), although both months have precipitation on 13 days. Humidity levels are also relatively high, with December at 92% and March at 86%. For more specific details about March weather in the area, you can visit Harrow on the Hill weather in March.
When comparing the weather in December and April, distinct differences emerge. December experiences colder temperatures, with a minimum of -4°C (24°F) and an average of just 6°C (44°F), making it a month characterized by chill and high humidity at 92%. In contrast, April sees a significant rise in temperatures, starting from a minimum of -2°C (29°F) and averaging 10°C (49°F), with maximum temperatures reaching a pleasant 26°C (80°F). Additionally, April boasts much lower precipitation levels, totaling only 33 mm (1.3 in) over 8 days, compared to December's 84 mm (3.3 in) across 13 rainy days. For a more detailed look at April's weather patterns, you can visit Harrow on the Hill weather in April.
December and May present notably different weather conditions. In December, temperatures can dip as low as -4°C (24°F), with an average of 6°C (44°F) and a max of 14°C (58°F). This month also sees higher precipitation, averaging 84 mm (3.3 in) over 13 days and maintaining a high humidity level of 92%. In contrast, May offers a milder climate with a minimum temperature of 1°C (35°F), an average of 13°C (55°F), and a maximum of 25°C (78°F). Precipitation decreases to 62 mm (2.5 in) over 11 days, and humidity drops to 79%. For further details on the weather in Harrow on the Hill during May, you can visit Harrow on the Hill weather in May.
December and June present a stark contrast in weather patterns. In December, temperatures range from a chilly -4°C (24°F) at night to a mild 14°C (58°F) during the day, accompanied by high humidity levels at 92%. The month sees approximately 84 mm (3.3 in) of precipitation over 13 days, creating a damp and cold atmosphere. In contrast, June boasts much warmer temperatures, with a minimum of 7°C (45°F) and a maximum reaching 31°C (89°F), while the average temperature sits at a comfortable 16°C (62°F). June is also relatively dry, with only 77 mm (3.0 in) of rain falling over 9 days and a lower humidity level of 80%. For more details on the weather during this vibrant summer month, visit Harrow on the Hill weather in June.
In December, the weather is notably colder, with temperatures ranging from a minimum of -4°C (24°F) to a maximum of 14°C (58°F), while the average sits at around 6°C (44°F). This month also sees higher precipitation, accumulating 84 mm (3.3 in) over 13 days, coupled with a high humidity of 92%. In contrast, July boasts much warmer temperatures, with a minimum of 9°C (49°F), an average of 18°C (65°F), and a peak of 36°C (96°F). The precipitation in July is lower at 64 mm (2.5 in) and occurs over 11 days, accompanied by reduced humidity at 71%. For a closer look at July's weather specifics, visit Harrow on the Hill weather in July.
December and August present contrasting weather conditions, with December showcasing a chillier climate characterized by temperatures ranging from a minimum of -4°C (24°F) to a maximum of 14°C (58°F). The month experiences significant humidity at 92% and typically sees about 84 mm (3.3 in) of precipitation over 13 days. In contrast, August offers a much warmer atmosphere, with temperatures that range from a minimum of 8°C (47°F) to a peak of 34°C (93°F). Although it experiences a slightly lower total precipitation of 70 mm (2.7 in) over 12 days, the humidity is notably more comfortable at 76%. For more specific details on weather patterns, you can check out Harrow on the Hill weather in August.
In December, the weather in Harrow on the Hill is characterized by colder temperatures, with minimums dropping to -4°C (24°F) and averaging around 6°C (44°F), while maximums reach only up to 14°C (58°F). This month also experiences higher precipitation at 84 mm (3.3 in) over 13 days, coupled with a high humidity level of 92%. In contrast, September offers milder conditions, with minimum temperatures of 4°C (39°F), an average of 15°C (59°F), and maximums peaking at 28°C (83°F). This month sees significantly less rainfall, totaling 45 mm (1.8 in) over 10 days, and slightly lower humidity at 82%. For more detailed insights, check out Harrow on the Hill weather in September.
In comparing the weather between October and December, there are notable differences in temperature and general conditions. October typically boasts a milder average temperature of 12°C (54°F), with maximums reaching 22°C (73°F), while December's temperatures are significantly cooler, ranging from a minimum of -4°C (24°F) to a maximum of 14°C (58°F). Both months experience similar levels of precipitation—84 mm (3.3 in)—but December sees slightly more rainy days at 13 compared to October's 12. Additionally, December's humidity is slightly higher at 92%, compared to October's 90%. For those interested in a detailed overview, you can explore Harrow on the Hill weather in October.
In comparing the weather between November and December, December tends to be slightly colder, with average temperatures ranging from -4°C (24°F) to 14°C (58°F), down from November's milder range of -2°C (29°F) to 16°C (62°F). Additionally, December experiences more precipitation, totaling 84 mm (3.3 in) over 13 days, compared to November's 52 mm (2.0 in) over 11 days. Both months share high humidity levels at 92%, but the chill of December often makes it feel colder. For a closer look at November's weather specifics, you can visit Harrow on the Hill weather in November.
As December envelops Harrow on the Hill, the weather takes on a distinctly chillier character compared to other months. The air becomes crisp and often damp, with high humidity levels creating a biting cold that can make the average temperature feel lower than it is. With increased precipitation and more frequent rainy days, residents and visitors alike can expect a luminous yet gloomy ambiance typical of winter. As the season draws in, cozy attire and hearty meals become essential for braving the colder climate. For a deeper understanding of what to expect throughout the year, explore more at Harrow on the Hill Climate.