Climate and monthly weather forecast
City of London, United Kingdom

Recognized by the Köppen climate classification as Cfb, City of London has a climate commonly noted as Marine west coast, warm summer. It sits on the Thames River in the southeastern part of England. The city experiences fairly constant climate conditions year-round - there are no strident temperature shifts from month to month.

Analyzing the climate patterns, daylight hours in London vary vastly from a low of 7.9 hours in December to a high of 16.5 hours in June. A gradual rise in temperature transpires from the start of the year, starting with a high average of 8.3°C (46.9°F) in January and reaching its peak at 22.6°C (72.7°F) in July. The temperature dips occur predominantly between September and December, culminating in the cooler month of December when the high averages are around 9.1°C (48.4°F). The low averages adhere to a similar pattern, with the warmest nights being in July and August at 14.6°C (58.3°F) and 14.7°C (58.5°F) respectively, whilst the cold nights descend in winter averaging 4.7°C (40.5°F) in December.

A unique aspect of London's weather is the slight dip in high temperatures and daylight hours in August. This drop, though minimal, tends to coincide with the end of the summer season.

Given the climate patterns, the ideal time for a visit should be from June to August. During these summer months, London experiences its highest temperatures and longest daylight hours. High temperatures average between 20°C (68°F) and 22.6°C (72.7°F), which is pleasant and warm without being overbearing. Meanwhile, 16.5 hours of daylight in June gradually decrease to 14.6 hours by August, adequate for sightseeing and outdoor activities.

On the other end of the spectrum, December to February are deemed as the least optimal months for a visit. These winter months see the mercury drop down to 4.7°C (40.5°F), with the highs barely reaching 9.1°C (48.4°F). Daylight hour also decrease significantly during these months, with an average of 7.9 hours in December, hinders opportunities for outdoor sightseeing and exploration.

London's spring months, comprising March, April, and May, present an ascending trend in temperatures. Highs start at 11.1°C (52°F) in March and reach 17.1°C (62.8°F) by May while the low averages increase from 5°C (41°F) to 9.4°C (48.9°F). Daylight hours extend progressively from 11.9 hours in March to 15.6 hours in May, enabling more sun exposure for tourists visiting during this season.

Summer brings warmth and light to London from June through August. Moderate summers are a highlight, with temperatures peaking from 20°C (68°F) to 22.6°C (72.7°F), while nighttime temperatures rest between 12.3°C (54.1°F) and 14.7°C (58.5°F). Long daylight hours starting from 16.5 hours in June and dwindling to 14.6 hours by August make for enjoyable summer days.

Transitioning into autumn, September through November, London experiences a downward trend in temperature and daylight hours. September kicks off with highs of 19.3°C (66.7°F), dipping to 11.2°C (52.2°F) by November. Night temperatures drop as well, from 12.5°C (54.5°F) in September to just 6.2°C (43.2°F) in November. Similarly, daylight hours reduce from 12.6 hours to a mere 8.9 hours during the same period.

December to February mark London's winter season. These months experience the year's lowest temperatures, with highs ranging from 9.1°C (48.4°F) to 8.3°C (46.9°F). Nighttime temperatures typically dwell between 4.7°C (40.5°F) and 3.4°C (38.1°F). The shortest daylight hours of the year happen in winter, with a low of 7.9 hours in December and just a slight rise to 8.4 hours by February.

January in the City of London exhibits a chilling atmosphere at the onset of a new year. Lower temperatures between 3.7°C (38.7°F) and 8.3°C (46.9°F) are characteristic of this month. Plan for a winter coat and scarf due to the biting cold. Weather in January »

Stepping out of January's icy breath, February experiences slightly mild conditions. During February, temperatures vary from 3.4°C (38.1°F) to 8.5°C (47.3°F), signifying a minor increase from the previous month. February also brings longer daylight hours, indicative of the approaching Spring. Weather in February »

March symbolizes the arrival of Spring in the City of London. The month marks a significant increase in temperature, offering a warmer weather transition from 5°C (41°F) to 11.1°C (52°F). Colorful blossoms start to pepper the cityscape, as the previously bare trees begin to bud. Weather in March »

April carries forth March's promise of Spring, turning the City of London into a canvas painted with a myriad shades of blooming flowers. The city experiences a further increase in temperatures that range from 6.4°C (43.5°F) to 13.5°C (56.3°F). Weather in April »

May employs a generous touch of warmth, with temperatures soaring from 9.4°C (48.9°F) to 17.1°C (62.8°F), signifying the onset of summer. The City of London stands abuzz with longer daylight hours, offering ample time to appreciate its architectural beauty or savor a picnic in one of its many parks. Weather in May »

June marks the beginning of Summer, and the City of London basks in longer daylight hours and increased temperatures. Temperature varies from 12.3°C (54.1°F) to 20°C (68°F), reflecting the sunny forecast typical of this time. The outdoor vigor makes the blushing Hyde Park or the budding Kew Gardens favored destinations. Weather in June »

July is known for its characteristic Summer warmth in the City of London. The mercury soars, setting temperatures between 14.6°C (58.3°F) and 22.6°C (72.7°F). Residents and tourists alike find solace in the city's iconic gardens under the clear, blue sky. Weather in July »

August showers a rich sunny veil over the City of London, maintaining similar temperature ranges as July from 14.7°C (58.5°F) to 22.5°C (72.5°F). The green spaces, filled with laughter and leisure, accentuate the city's summer charm. Weather in August »

As September adorns the City of London, it marks the onset of Autumn. The temperature now descends from 19.3°C (66.7°F) to 12.5°C (54.5°F), with daylight hours reducing gradually. London's sprawling scenery begins to morph into different shades of yellow, orange, and red, adding a picturesque contrast to the urban skyline. Weather in September »

October reels the City of London further into the heart of Autumn. The temperatures go down to a cooler spectrum, varying from 9.6°C (49.3°F) to 15.3°C (59.5°F). The red and golden hues of falling leaves dominate the visual landscape, and the city sparkles under the breathtaking Autumn sunset. Weather in October »

The last month of the autumn, November, is cool month in City of London, United Kingdom, with an average temperature varying between 6.2°C (43.2°F) and 11.2°C (52.2°F). As October shifts into November, a minor alteration in temperatures is observed, with average highs reducing from a mild 15.3°C (59.5°F) to a fresh 11.2°C (52.2°F). Weather in November »

December welcomes Winter to the City of London, as the year draws to a close. The temperatures fluctuate between 4.7°C (40.5°F) and 9.1°C (48.4°F), adding to the festive warmth of the holiday season. The shorter daylight hours lend a cozy charm to the city, adorned with sparkling Christmas lights. Weather in December »