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Weather in London by Season

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This post provides details about what kind of weather to expect in London throughout the year.

We include average temperatures, average precipitation, and other important information to consider.

London is a great city to visit, no matter the time of year. 

There’s plenty to do outside on gorgeous days, and inside on cold or wet days.

London tends to have fairly decent weather most months, although you’ll always want to have an umbrella on hand and at some times of the year warm clothing as well.

Below, you’ll find London’s average temperature by month, as well as the average number of days of rain and sun each month.

We also provide suggestions as to the attire you’ll want to pack by season for your visit.


SPRING WEATHER IN LONDON

The spring months are starting to warm up after the cold of winter, and at times days can be mild. 

You’ll still have a cold morning or evening here or there, and you can expect rain. 


SPRING AVERAGE TEMPS


March

Early In the Month

Daytime: 8-9 C (46-49F)  | Overnight: 2-3 C (36-39 F)

Late in the Month

Daytime: 11-12 C (53-55F) | Overnight: 4-5 C (40-42 F)


April

Early In the Month

Daytime: 12 C (54 F) | Overnight: 4-5 C (40-42 F)

Late in the Month

Daytime: 15-16 C (49-51 F) | Overnight: 7-8 C (44-46 F)


May

Early In the Month

Daytime: 15-16 C (49-51 F) | Overnight: 7-8 C (44-46 F)

Late in the Month

Daytime: 18-19 C (64-66 F) | Overnight: 10-11 C (50-52 F)


SPRING AVERAGE RAIN AND SUN

Snow is rare during the spring months, although there is usually some precipitation and you can expect a good number of cloudy days.


March

On average there will be around 17-18 mostly cloudy days. 

Around 16 days will have precipitation, and 2 will likely have some snow.


April

About 13-14 days will have either sunny or at least partly sunny skies. 

18-19 days will record some rainfall with one of these days reporting snow


May

About 14-15 days this month will have sunny or at least partly sunny skies.

About 15 days this month could see some rain.

However,  only 6-8 days will be considered “rainy days” when at least 1 mm/0.04 inches of rain falls.


SPRING ATTIRE

In early spring you’ll want to dress in layers. 

This will keep you warm over cold days, but items can be removed as days warm up. 

In late spring a light to moderate weight jacket or coat will serve you well for those cold mornings or evenings. 

And rain gear is a must throughout the spring. At the very least an umbrella will serve you well.


SUMMER WEATHER IN LONDON

The summer months move into comfortable temps. 

You’ll still have a chilly morning or evening here or there, a bit of rain, and even a hot day or two.

However, for the most part, it’s a great time to be out and about in London.


SUMMER AVERAGE TEMPS


June

Early In the Month

Daytime: 18-19 C (64-66 F) | Overnight: 11-12 C (52-54 F)

Late in the Month

Daytime: 21-22 C (70-72 F) | Overnight: 13-14 C (55-57 F)


July

Early In the Month

Daytime: low-20s C (68-70 F) | Overnight: 10-12 C (50-54 F)

Late in the Month

Daytime: 22-23 C (72-74 F) | Overnight: 13-14 C (55-57 F)


August

Early In the Month

Daytime: low-20s C (low-70s F) | Overnight: 15-16 C (59-61 F)

Late in the Month

Daytime: 21 C (70 F) | Overnight: 13-14 C (55-57 F)

*note that there may be a couple of days in August that reach as high as 29 C (84 F).


SUMMER AVERAGE RAIN AND SUN


June

Cloudiness decreases during June with about 14-16 days having either sunny or at least partly sunny skies.

About 13 days this month will record some rainfall.

However, only about 7-8 days will record at least 1 mm (0.04 inches) or more rainfall.


July

Skies will be clear or at least partly sunny on 17-18 days this month.

About 14 days will have some rain.

However, only about 6 of these days will record 1mm (0.04 inches) or more.


August

There will be 17-18 days sunny or at least partly sunny skies in August, while only 7-8 days are likely to see rainfalls of 1mm (.04 inches) or more.


SUMMER ATTIRE

Summer tends to be comfortable in London.

Although the weather is increasingly warmer through these months, you will still need a mix of spring and summer clothes as the weather can be quite changeable. 

A light jacket will be handy for those colder mornings or evenings.

As usual, it can’t hurt to have a small umbrella on hand for those days when the skies decide to open up.


AUTUMN WEATHER IN LONDON

Autumn is also a lovely time to visit London. 

The weather is starting to cool down, there’s a good amount of drizzle, and daylight hours are decreasing, but it’s still comfortable outside.


AUTUMN AVERAGE TEMPS


September

Early In the Month

Daytime: 21-22 C (70-72 F) | Overnight: 13-14 C (55-57 F)

Late in the Month

Daytime: 17-18 C (62-64 F) | *Overnight: 11-12 C (52-54 F)

*note that some mornings can dip as low as 8-9 C (46-48 F)


October

Early In the Month

Daytime: 17-18 C (62-64 F) | Overnight: 10 C (50 F)

Late in the Month

Daytime: 13-14 C (55-57 F) | Overnight: 7-8 C (44-46 F)


November

Early In the Month

Daytime: 13-14 C (55-57 F) | Overnight: 8-9 C (50 F)

Late in the Month

Daytime: 9-10 C (48-50 F) | *Overnight: 5-6 C (41-43 F)

*Note that some mornings late in the month may dip down as low as 1-2 C (34-36 F)


AUTUMN AVERAGE RAIN AND SUN


September

Skies will be clear or at least partly sunny on 14-16 days this month offering ample time to explore London on foot. 

About 15 days during September will record some rain, however, only 7-8 days will record at least 1 mm (0.04 inches) or more.


October

However, there are still about 13-15 days during this month that will see either sunny or partly sunny skies with the remainder of the month being mostly cloudy.

Some rain occurs on about 20 days this month with about 16 of these having moderate to sometimes heavy rains. 


November

Skies will be cloudy or mostly cloudy on 21-22 days with some rainfall likely on about 17 days.

Snow is unlikely early in November; however, towards the end of November, the risk for some snow increases to about 5-10 %. 


AUTUMN ATTIRE

As it is in late spring and summer, a light sweater or windbreaker may be all you need for the early morning and even afternoons late in the season.

You’ll definitely want to carry a waterproof jacket or umbrella because you can count on precipitation on many days.

As you get towards the end of November, you may want to consider having some winter attire on hand.


WINTER WEATHER IN LONDON

While it’s wet and cold in London during the winter months, it’s warmer than other surrounding areas because of the heat-island effect. 

It’s also darker and windier than some other months, but it’s not likely there will be much snow.


WINTER AVERAGE TEMPS


December

Early in the Month

Daytime: 9-10 C (48-50 F) | Overnight: 5-6 C (41-43 F)

Late in the Month

Daytime: 6-7 C (43-47 F) | Overnight: 3-4 C (37-39 F)


January

Early in the Month

Daytime: 8-9 C (46-48 F) | Overnight:  3-5 C (37-41 F)

Late in the Month

Daytime: 8-9 C (46-44 F) | Overnight: 3-5 C (37-41 F)


February

Early in the Month Late in the Month

Daytime: 7-8 C (44-46 F) | *Overnight: 3-5 C (37-41 F)

Late in the Month

Daytime: 9-10 C (48-50 F) | Overnight: 2-4 C (36-39 F)

*Note that some mornings can dip down to -1 to 0 C (30-32 F) or even lower.


WINTER AVERAGE RAIN AND SUN


December

Skies this month tend to be partly to mostly overcast with about 9-10 days seeing at least 1 mm (.04 inches) of precipitation, mostly falling in the form of light to moderate rain.

Some snow is reported here in December, but only over about 2-3 days.


January

About 9 days this month will be clear or at least partly sunny while the remaining days tend to be cloudy or mostly cloudy.  

You can expect at least a trace of precipitation on 18-19 days this month.

However, only about 9-10 days have precipitation amounts of at least 1mm (0.04 inches) or more while snow falls on average, on only about 2 days during January. 


February

On average, about 10 days this month will see clear or at least partly sunny skies while about 18 days will be cloudy or mostly cloudy.

Rain or snow falls on about 15-16 days this month, however, only about 6-7 days record at least 1 mm (0.04 inches) of precipitation.

Snow is more likely early in the month than towards the end of the month, but only 3 days on average will see some snow. 

It can also be a bit windy at times.


WINTER ATTIRE

You’ll want to be sure to pack warm clothes for a winter visit to London.

Think layers of clothes, a medium to thick weight coat, scarves, hats, gloves, and possible winter boots.

As with all other times of year, it’s best to carry an umbrella because there are sure to be many drizzly days.


GENERAL QUESTIONS

What is the coldest month of the year in London?

January


What is the coldest month of the year in the UK?

January tends to be coldest, although December and February are a close second


What is the hottest month of the year in London?

July


What is the hottest month of the year in the UK?

July and August tend to be warmest


What is London’s annual rainfall?

23-24 inches


How many days of rain does London get annually?

Around 200 days


What is the wettest month in London?

This is usually October or November, sometimes even December.


When does it snow in London?

If there’s going to be snow, you’ll usually find it in January or February, however snow is overall rare in London.


What are the busiest travel months in London?

The high season is usually July and August.

About The Author

Fred Pickhardt

Fred is a marine meteorologist and sailed briefly with American Export Lines in the Far East trade. He has extensive experience in weather analysis, weather forecasting, and forensic weather event reconstructions. Fred founded Ocean Weather Services and currently provides forensic marine weather reports to the maritime industry.
Updated: January 15th, 2023
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