There’s no single UK rainy season the way tropical destinations have one. Rain falls in every month of the year here, but some months are considerably wetter than others.
This guide breaks down real Met Office data month by month, so you can see exactly when rain is heaviest, when it eases off, and how to pack either way.
- The UK has no single rainy season; rain falls year-round, though October to January is clearly the wettest stretch.
- December is the wettest month on average, at around 127mm across the UK, with November and October close behind.
- April and May are the driest months, both averaging around 71–72mm, with June and July staying nearly as low.
- London gets noticeably less rain than the UK average, so a London-only trip usually sees less rain than the national figures suggest.
Does the UK Actually Have a Rainy Season?
No, not in the technical sense. The UK has a temperate maritime climate, and the Met Office reserves the term “rainy season” for monsoon-driven countries near the equator.
Those regions get one clearly defined wet season and one dry season each year, driven by shifting wind patterns across the tropics.
Britain doesn’t work that way. Rain falls in every single month here, just in noticeably different amounts, which is why the country has a reputation for being wet without ever fitting the tropical definition of a rainy season.
UK Weather by Month: The Real Rainfall Numbers
Here’s what the Met Office’s 30-year averages (1991–2020) actually show for rainfall across the UK, month by month.
The gap between the wettest and driest months is roughly 56mm, or nearly double. That’s enough to notice, but not enough to call any single stretch a true dry season.
The Wettest Months in the UK
December is the wettest month in the UK on average, at around 127mm of rain nationwide.
November and October follow closely, both averaging around 123mm, so the whole October-to-January stretch runs consistently wet.
January adds another 121mm on top of that, making the turn of the year the dampest, greyest part of the British calendar.
If you’re travelling during these months, expect shorter daylight hours on top of the rain. Build extra time into outdoor plans in case of delays.
The Driest Months in the UK (and Why “Dry” Still Means Pack a Jacket)
April and May are the UK’s driest months, both averaging around 71–72mm of rain. June and July stay nearly as low, in the high 70s to low 80s.
That’s still meaningful rain — roughly half of December’s total, not zero.
Even peak summer isn’t rain-proof. Wimbledon, held over two weeks each summer, is famous for rain delays, which is exactly why Centre Court has a retractable roof.
The Met Office’s summer 2026 outlook favors warmer, more heatwave-prone conditions overall. That’s framed as a probability, not a firm forecast, and near-average conditions remain the single most likely outcome.
If you’re chasing heat rather than rain, our UK heatwave guide covers what recent hot spells have looked like and how to plan around them.
Is London Actually Drier Than the Rest of the UK?
Yes. London is measurably drier than the UK as a whole.
Heathrow’s 1991–2020 average works out to around 615mm of rain a year, roughly half the UK-wide figure of 1,163mm.
That’s because south-east England sits in the rain shadow of the hills and mountains further west and north, which catch most of the moisture blowing in off the Atlantic first.
So if your trip is London-only, the national rainfall figures overstate how wet your actual visit is likely to be.
Worried about the opposite problem instead? Our London heatwave guide covers what recent hot spells there have looked like.
Best Time to Visit the UK Weather-Wise
There’s no single “best” month. It depends on what you’re optimizing for.
- Driest visit: Aim for April, May, June or July, when rainfall is lowest and daylight hours are longest.
- Fewer crowds, moderate rain: March or September and October sit between the wet and dry extremes, with thinner tourist crowds than peak summer.
- Avoid the wettest weeks: Steer clear of late October through January if rain is your main concern, since this stretch is consistently the wettest.
- Festive season visits: December is the wettest month, so if you’re visiting for Christmas markets or the lights, budget extra time and a solid raincoat.
Whatever month you choose, UK weather can still surprise you. A light waterproof is worth packing year-round.
What to Pack for a UK Trip, Whatever the Month
Since rain can happen in any month, pack the same core layer regardless of season.
- A packable waterproof jacket: Lighter than an umbrella and easier to manage on the windy days that often come with UK rain.
- Waterproof or water-resistant shoes: Pavements and cobblestones get slick fast, especially in cities.
- Layers over one heavy coat: UK temperatures shift through the day, so thin layers adapt better than a single bulky coat.
- A compact umbrella as backup: Useful on calmer days when wind isn’t a factor.
- A daypack with a rain cover: Keeps electronics and documents dry during sudden showers.
Frequently Asked Questions
Does the UK have a rainy season?
No single rainy season exists in the UK. Rain falls year-round, but October through January are consistently the wettest months, while April through July are the driest.
What is the wettest month in the UK?
December is the wettest month on average, with around 127mm of rain across the UK based on Met Office 1991–2020 data. November and October are close behind, both around 123mm.
What is the driest month in the UK?
April and May are the driest months, both averaging around 71–72mm of rain. June and July stay nearly as low.
Does it rain every day in London?
No. London actually receives less rain than the UK average, around 615mm a year at Heathrow versus 1,163mm UK-wide, because south-east England sits in a rain shadow.
Will summer 2026 be a dry summer in the UK?
Not necessarily. The Met Office’s summer 2026 outlook favors warmer, more heatwave-prone conditions, but this is a probability rather than a firm forecast, and near-average conditions remain the single most likely outcome.
What should I pack for rain in the UK?
Pack a packable waterproof jacket, water-resistant shoes, and light layers rather than one heavy coat. A compact umbrella works well as backup on calmer days.
Planning Your UK Trip Around the Weather
The UK’s rain isn’t confined to one season, but the month-by-month pattern above is consistent enough to plan around.
Pick your preferred window from the chart, then compare flights and hotels on Wego to lock in the trip.
Sources
- Met Office — When is rainy season?
- Met Office — UK monthly and annual rainfall series (HadUK-Grid areal data)
- Met Office — Heathrow long-term climate averages (1991–2020)
- Met Office — What does a 3-Month Outlook really tell us? (Summer 2026)
Disclaimer: We’ve worked hard to make sure the information in this article is as accurate and up to date as possible at the time of publishing. Travel details such as prices, schedules, visa rules, and entry requirements can change at short notice, so it remains your responsibility to verify the current details with official sources before you book or travel. Wego accepts no liability for any loss or inconvenience arising from the use of this content.
