The best times to visit London for ideal weather are

May 21st to July 15th

or

August 6th to September 30th

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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London Travel Guide

  • Safety
  • The busiest and least popular months
  • Overall travel experience by time of year
  • Weather in London

    Temperature

    Average temperatures in London vary somewhat and are temperate for much of the year. The area is in the top 43 percent of tourist destinations for pleasant weather. 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 62.4°F (16.9°C) with temperatures rarely dropping below 44.9°F (7.2°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)

    Key
    High
    Average
    Low

    London Perceived Temperature (C)

    Key
    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 30.2 23 15.7
    Feb 30 22.6 14.7
    Mar 43.2 33.5 25.2
    Apr 57.2 45.3 34.8
    May 69.6 57.6 45.6
    Jun 77.5 66.3 55.5
    Jul 81.3 69.9 58.1
    Aug 79.5 68.2 57.5
    Sep 73 61.3 51.1
    Oct 60.1 50 41.6
    Nov 48.1 39.5 31.8
    Dec 35.7 29.1 22.8

    Show Celsius

    Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
    Jan -1 -5 -9.1
    Feb -1.1 -5.2 -9.6
    Mar 6.2 0.8 -3.8
    Apr 14 7.4 1.6
    May 20.9 14.2 7.6
    Jun 25.3 19.1 13.1
    Jul 27.4 21.1 14.5
    Aug 26.4 20.1 14.2
    Sep 22.8 16.3 10.6
    Oct 15.6 10 5.3
    Nov 8.9 4.2 -0.1
    Dec 2.1 -1.6 -5.1

     

    Precipitation (Rain or Snow)

    If dry weather is what you’re after, the months with the lowest chance of precipitation in London are January, February, and then December. The lowest chance of rain or snow occurs around late August to early September. For example, on the week of August 27th there are only 0.8 days of precipitation on average. By contrast, it’s most likely to rain or snow in late January and early February with an average of 2.5 days with significant precipitation the week of January 29th.

    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.

    Chance of 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 32.9 2 0.06
    Feb 28.6 2.7 0.05
    Mar 20 2.4 0.04
    Apr 22.9 0.2 0.05
    May 21.4 0 0.05
    Jun 20 0 0.05
    Jul 18.6 0 0.05
    Aug 17.1 0 0.06
    Sep 18.6 0 0.05
    Oct 22.9 3.4 0.05
    Nov 22.9 0.4 0.05
    Dec 27.1 1.5 0.06

    Show Centimeters

    Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
    Jan 32.9 5.1 0.15
    Feb 28.6 6.9 0.13
    Mar 20 6.1 0.1
    Apr 22.9 0.5 0.13
    May 21.4 0 0.13
    Jun 20 0 0.13
    Jul 18.6 0 0.13
    Aug 17.1 0 0.15
    Sep 18.6 0 0.13
    Oct 22.9 8.6 0.13
    Nov 22.9 1 0.13
    Dec 27.1 3.8 0.15

     

    Humidity and Wind

    London has slightly high to average humidity compared to most tourist destinations. The least humid month is April (55.6% relative humidity), and the most humid month is December (74.1%).

    Wind in London is usually moderate. The windiest month is April, followed by January and February. April’s average wind speed of around 5.1 knots (5.9 MPH or 9.4 KPH) is considered “light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late April where average top sustained speeds reach 10.2 knots, which is considered a gentle breeze.

    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.

    Month Avg. Wind Meaning (Beaufort) Avg. Maximum Sustained Wind Meaning (Beufort)
    Jan 5.1 a light breeze 8.9 a gentle breeze
    Feb 5 a light breeze 9 a gentle breeze
    Mar 4.8 a light breeze 8.6 a gentle breeze
    Apr 5.1 a light breeze 9.7 a gentle breeze
    May 4.3 a light breeze 8.5 a gentle breeze
    Jun 4.3 a light breeze 8.5 a gentle breeze
    Jul 3.9 light air 8 a gentle breeze
    Aug 3.6 light air 7.7 a gentle breeze
    Sep 3.4 light air 7.5 a gentle breeze
    Oct 4.1 a light breeze 8.3 a gentle breeze
    Nov 4.4 a light breeze 8.2 a gentle breeze
    Dec 5 a light breeze 8.7 a gentle breeze

    Show Relative Humidity by Month

    Month Avg. Relative Humidity
    Jan 71.7
    Feb 69.3
    Mar 62.5
    Apr 55.6
    May 55.7
    Jun 60.6
    Jul 61.2
    Aug 66.1
    Sep 68.4
    Oct 68.8
    Nov 70.2
    Dec 74.1

     

    Is it Safe to Travel to London?

    As of 6/28/2017 there are no travel advisories or warnings for Canada; exercise normal security precautions. 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, Canada is July, followed by May and April. 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. Displayed data is calculated relative to the peak, so a score of 57.6 in December means 57.6% of the tourists vs. July.

    Overall London Travel Experience by Season

    Spring (March through May)

    Humidity and temperatures combine to make this season feel moderately cold. Highs range from 57.2°F (14°C) and 25°F (-3.9°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 7 days of precipitation per month. Spring is busy for tourism, which makes it a good time for those looking for things to do.

    Summer (June through August)

    The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see moderate precipitation with 5 to 6 days of precipitation per month. June – August is the busiest season for tourism in London, so lodging and other accommodations may cost more than usual.

    Fall (September through November)

    Fall daily highs range from 58.4°F (14.7°C) and 31.7°F (-0.2°C), which will feel chilly given the humidity and wind. It rains or snows a fair amount: 6 to 7 days per month. Tourism is the slowest during these months due to the weather, so hotels may be lower priced.

    Winter (December through February)

    Weather is far too cold this time of year in London to be enjoyable for warm weather travelers. The average high during this season is between 27.6°F (-2.4°C) and 19.7°F (-6.8°C). On average, it rains or snows a noticeable amount: 8 to 10 times per month. These times of year are fairly slow with tourists.

     

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