Honestly, if you stepped outside in London this morning expecting that "classic" English drizzle, you might be surprised. It’s not just wet; it’s stubbornly grey. We’re looking at a Sunday where the sky basically forgot how to be anything but a giant, damp wool blanket.
The Real Numbers for Today
Let’s get the hard facts out of the way. According to the latest data from Google Weather, London is sitting at a steady 45°F right now. But don't let that fool you. With the wind coming in from the northeast at a lazy 6 mph, the "feels like" temperature is actually closer to 41°F. It’s that kind of cold that crawls under your collar if you aren't wrapped up.
Humidity is maxed out at a whopping 98%. Basically, the air is holding as much water as it can without actually giving us a proper downpour.
Why Today Feels So Different
The forecast for the rest of Sunday, January 18, 2026, is sticking to the "cloudy" script. We’re expecting a high of 51°F and a low of 42°F. It sounds mild for January, right? Most people think "50 degrees" and figure a light jacket is fine. In London? No. That high humidity means the air feels heavy and much chillier than the thermometer suggests.
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There is a 20% chance of rain during the day. It's not a washout, but it’s enough to keep the pavements slick and the mood a bit moody. By tonight, things settle into a "mostly cloudy" vibe with the rain chance dropping to 10%.
The Fog Factor
You’ve probably noticed the murk. The Met Office has been tracking some pretty stubborn low cloud and fog across eastern England today. While the southeast—including us here in London—might see some "brighter spells," don't go hunting for your sunglasses just yet. The fog is the real story for travelers. If you're heading out of the city toward the North or West, visibility is going to be a nightmare.
What’s Actually Happening
It’s a classic tug-of-war. We’ve got Atlantic weather systems trying to push in from the west, while high pressure is holding firm to the northeast. This leaves London in a sort of meteorological "no man's land."
- UV Index: It's a flat 0. You won't be catching any rays today.
- Wind: Switching slightly to the southeast later at 6 mph.
- Outlook: We aren't out of the woods. The BBC and Met Office are already eyeing a shift toward sleet and colder snaps as we move toward the end of the month.
Navigating the Day
If you're planning to hit the Southbank or wander through Shoreditch, just know that the "damp" is your main enemy today, not necessarily a storm. The air is thick. It’s the kind of day where your hair gets frizzy and your coat feels slightly heavy by the time you get home.
Pro tip for today: Skip the umbrella—it’s too bulky for a 20% sprinkle—and go with a water-resistant parka with a hood. You’ll want that wind protection since the northeast breeze is biting more than the speed suggests.
Watch the roads if you're driving late. That humidity combined with dropping temperatures usually means "black ice" isn't a threat yet, but visibility definitely is. Keep your lights on and your distance even greater.
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Next Steps for Your Sunday:
Check the live transit updates before heading to any major London hubs, as fog in the surrounding areas often causes knock-on delays for trains entering the city. If you're staying local, stick to indoor plans like the British Museum or a tucked-away pub in Marylebone to avoid the "feels like" 41-degree chill.