The best times to visit London for ideal weather are

May 7th to October 21st

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

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Weather in London

Temperature

Average temperatures in London vary greatly. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is somewhat temperate — in the 40th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit London, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 75.8°F (24.3°C) with temperatures rarely dropping below 59°F (15°C) at night.

London Temperatures (Fahrenheit)

Key
High
Average
Low

London Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

London Perceived Temperature (F)

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High
Average
Low

London Perceived Temperature (C)

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High
Average
Low

 

Average London Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 46.3 42.2 37.7
Feb 47.2 42.5 38
Mar 53.6 46.2 40.2
Apr 60.6 51.8 44.5
May 64.2 56 48.6
Jun 70.1 61.3 53.5
Jul 74.7 65.9 58.2
Aug 72.5 64.1 57.2
Sep 68 59.8 53.1
Oct 61.5 55.2 49.8
Nov 53.2 48.6 43.8
Dec 48.2 44 39.1

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 7.9 5.7 3.2
Feb 8.4 5.8 3.3
Mar 12 7.9 4.6
Apr 15.9 11 6.9
May 17.9 13.3 9.2
Jun 21.2 16.3 11.9
Jul 23.7 18.8 14.6
Aug 22.5 17.8 14
Sep 20 15.4 11.7
Oct 16.4 12.9 9.9
Nov 11.8 9.2 6.6
Dec 9 6.7 3.9

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Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in London are April, September, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid March. For example, on the week of March 12th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid December with an average of 3 days of significant precipitation the week of December 17th.

When can you find snow in London? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chanceof Precipitation

The graph below shows the % chance of rainy and snowy days in London.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in London (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 27% 0 2.6
Feb 24% 0 2
Mar 15% 0 1.2
Apr 12% 0 1
May 17% 0 1.8
Jun 18% 0 2.1
Jul 17% 0 1.7
Aug 17% 0 2.4
Sep 13% 0 1.4
Oct 19% 0 2
Nov 22% 0 2.1
Dec 25% 0 2.4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 27 0 6.6
Feb 24 0 5.1
Mar 15 0 3
Apr 12 0 2.5
May 17 0 4.6
Jun 18 0 5.3
Jul 17 0 4.3
Aug 17 0 6.1
Sep 13 0 3.6
Oct 19 0 5.1
Nov 22 0 5.3
Dec 25 0 6.1

 

Humidity and Wind

London has some very humid months, with other comfortably humid months. The least humid month is April (58.1% relative humidity), and the most humid month is November (78.7%).

Wind in London is usually not reported.

Relative Humidity (%)

The graph below shows the average % humidity by month in London.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 0 Still 0 Still
Feb 0 Still 0 Still
Mar 0 Still 0 Still
Apr 0 Still 0 Still
May 0 Still 0 Still
Jun 0 Still 0 Still
Jul 0 Still 0 Still
Aug 0 Still 0 Still
Sep 0 Still 0 Still
Oct 0 Still 0 Still
Nov 0 Still 0 Still
Dec 0 Still 0 Still

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 75.8%
Feb 71.6%
Mar 64%
Apr 58.1%
May 58.4%
Jun 59.5%
Jul 58.2%
Aug 62.6%
Sep 67.7%
Oct 74.1%
Nov 78.7%
Dec 76.5%

 

Is it Safe to Travel to London?

Our best data indicates this area is somewhat safe. As of Jan 18, 2018 there are travel warnings for the United Kingdom; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories


 

The Busiest and Least Crowded Months

The busiest month for tourism in London, the United Kingdom is January, followed by September and October. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit London in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is very reliable. Displayed data is calculated relative to the peak, so a score of 67.3 in December means 67.3% of the tourists vs. January.


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Overall London Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 67.6°F (19.8°C) and 49.7°F (9.8°C) with warmer temperatures in the later months. Rain is somewhat common with 4 to 5 days of significant precipitation per month. Spring is the slowest for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see moderate precipitation with about 5 days of precipitation per month. June – August is the second busiest season for tourism in London, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 70.6°F (21.4°C) and 48.7°F (9.3°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 4 to 6 days per month. Tourism is the busiest during these months due to the weather, so hotels may be higher priced.

Winter (December through February)

Weather is too cold this time of year in London to be enjoyable for warm weather travelers. The average high during this season is between 49.7°F (9.8°C) and 44.5°F (6.9°C). On average, it rains or snows a fair amount: 7 to 8 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travelthe United Kingdom › London, the United Kingdom

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