WHY IS LONDON ALWAYS CLOUDY?

Every client planning a London trip eventually asks me some version of the same question: is it really going to rain the whole time? London’s reputation for gray skies is well documented, but the reasons behind it are more about geography. So just why is London always cloudy?

WHY LONDON SITS DIRECTLY IN THE ATLANTIC JET STREAM?

London sits on a relatively low, flat stretch of southeastern England, directly in the path of the Atlantic jet stream, a fast-moving band of air that constantly pushes weather systems in from the ocean. Because there is very little high terrain to block or redirect that airflow, the city sees a steady parade of low-pressure systems moving through. Each one brings cloud coverm even when it does not bring measurable rain.

WHY CLOUD COVER DOES NOT ALWAYS MEAN RAIN?

The city’s location also puts it at the boundary where cooler air and moisture-heavy Atlantic air regularly collide, which is a recipe for overcast skies, but often no dramatic storms. London does not actually receive an unusual amount of total rainfall compared to other major cities. It just spreads that rainfall out over far more days of the year, with persistent cloud cover in between the showers.

HOW THE THAMES VALLEY ADDS TO THE FOG?

Urban geography plays a role too. The Thames Valley traps a certain amount of moisture and mist, especially in early mornings. This is part of why historic London fog became so associated with the city in Victorian literature. Even though today’s fog is nothing like the coal-smoke pea-soupers of the 1800s, thank goodness.

WHAT LONDON’S CLOUDS MEAN FOR YOUR TRIP?

For clients, the practical upside is that London’s weather is remarkably mild year-round because of that same Atlantic influence. It rarely has extreme heat or cold. I always tell clients to pack layers and a light rain jacket rather than worrying about a washed-out trip. Often the clouds tend to break for a few hours most days, and some of the city’s best light for photos at Tower Bridge or along the South Bank comes right after a passing shower.

THE ANSWER TO THE QUESTION:

London’s low, flat position sits in the Atlantic jet stream, which pushes clouds over the city all year. That steady parade of weather systems, not unusually heavy rainfall, creates London’s famously gray skies. We hope you enjoy the benefits of travel on your next trip and the many more to come!

Additional Resources:

London is one of “The Big Four” or the most common cities visited by travelers which include Paris, Rome and New York City. London has its own feel and we welcome you to explore London further. Visiting an urban center has benefits as you quickly learn what you enjoy and what you do not enjoy. Subscribers to my newsletter receive this free resource, The Ten Levels of Travel, and you can subscribe on our website. Feel free to explore our services or by enjoy more of our Blog like “Why is Travel So Important?”. We hope you are inspired to Travel Far, & Travel Well with CARTE ATLAS.