May 2021 Weather History in London United Kingdom

The data for this report comes from the London Heathrow Airport. See all nearby weather stations

This report shows the past weather for London, providing a weather history for May 2021. It features all historical weather data series we have available, including the London temperature history for May 2021. You can drill down from year to month and even day level reports by clicking on the graphs.

London Temperature History May 2021

Temperature history in May 2021 in London18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313130°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAprJun
The daily range of reported temperatures (gray bars) and 24-hour highs (red ticks) and lows (blue ticks), placed over the daily average high (faint red line) and low (faint blue line) temperature, with 25th to 75th and 10th to 90th percentile bands.

Hourly Temperature in May 2021 in London

Hourly Temperature in May 2021 in London18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAprJunvery coldcoldcoolwarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The hourly reported temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
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Cloud Cover in May 2021 in London

Cloud Cover in May 2021 in London18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAprJun
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
no significant cloudno cloud detectedceiling and visibility ok
The hourly reported cloud coverage, categorized by the percentage of the sky covered by clouds.

Observed Weather in May 2021 in London

Observed Weather in May 2021 in London18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAprJun
foghazedrizzlelight rainmoderate rainheavy rainfreezing rainsleetsnow grainslight snowmoderate snowheavy snowhailthunderstorm
The hourly observed weather, color coded by category (in order of severity). If multiple reports are present, the most severe code is shown.
DayObservationsPrecipitationCodes
Sun, May 2 Light Rain-RA
Mon, May 3 Light Rain-RA
Tue, May 4 Showers of Heavy Rain, Rain, Light Rain, Showers of Light RainIWCA83, IWCA23, IWCA61, IWCA57, IWCA81
Wed, May 5 Rain, Showers of Rain, Light RainIWCA62, IWCA23, IWCA82, IWCA61, IWC61
Thu, May 6 Rain, Light Rain, Showers of Light RainIWCA23, IWCA61, IWCA81
Sat, May 8 Rain, Recent Rain, Light Rain, Light Rain and Drizzle, Recent DrizzleRA, RERA, -RA, -RADZ, REDZ
Sun, May 9 Light Rain-RA
Mon, May 10 Recent Rain, Light RainRERA, -RA
Tue, May 11 Light Rain-RA
Wed, May 12 Light Rain-RA
Thu, May 13 Light Rain-RA
Fri, May 14 Recent Rain, Light Rain, Recent DrizzleRERA, -RA, REDZ
Sat, May 15 Thunderstorm in the Vicinity, Rain, Rain and Drizzle, Recent Rain, Light RainVCTS, RA, RADZ, RERA, -RA
Sun, May 16 Heavy Rain, Showers of Heavy Rain, Recent Rain, Recent Showers of Rain, Light Rain, Showers of Light Rain, Recent Drizzle+RA, +SHRA, RERA, RESHRA, -RA, -SHRA, REDZ
Mon, May 17 Recent Thunderstorm with Rain, Thunderstorm in the Vicinity, Thunderstorm with Rain, Recent Showers of Rain, Showers of Rain, Light RainRETSRA, VCTS, TSRA, RESHRA, SHRA, -RA
Tue, May 18 Recent Thunderstorm, Recent Thunderstorm with Rain, Thunderstorm, Recent Rain, Recent Showers of Rain, Showers of Rain, Light RainRETS, RETSRA, TS, RERA, RESHRA, SHRA, -RA
Wed, May 19 Light Rain-RA
Thu, May 20 Light Rain-RA
Fri, May 21 Recent Rain, Light RainRERA, -RA
Sat, May 22 Recent Rain, Light Rain, Recent DrizzleRERA, -RA, REDZ
Sun, May 23 Rain, Recent Rain, Light RainRA, RERA, -RA
Mon, May 24 Recent Thunderstorm with Rain, Thunderstorm in the Vicinity, Recent Rain, Recent Showers of Rain, Showers of Rain, Light Rain, Showers of Light Rain, Recent DrizzleRETSRA, VCTS, RERA, RESHRA, SHRA, -RA, -SHRA, REDZ
Tue, May 25 Light Rain-RA
Fri, May 28 Light Rain-RA

Hours of Daylight and Twilight in May 2021 in London

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

Sunrise & Sunset with Twilight in May 2021 in London

The solar day over the course of May 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Solar Elevation and Azimuth in May 2021 in London

Solar Elevation and Azimuth in May 2021 in LondonMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAprJun0010102020303040405050600010102020303040405050
northeastsouthwest
Solar elevation and azimuth over the course of May 2021. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

Moon Rise, Set & Phases in May 2021 in London

Moon Rise, Set & Phases in May 2021 in London18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAprJunApr 274:32 AMApr 274:32 AMMay 118:01 PMMay 118:01 PMMay 2612:15 PMMay 2612:15 PM7:27 PM7:27 PM6:06 AM6:06 AM5:21 AM5:21 AM8:26 PM8:26 PM7:52 PM7:52 PM4:54 AM4:54 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
May 2021IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
78%1:12 AMSE8:35 AMSW-4:53 AMS228,603 mi
2
67%2:11 AMSE9:41 AMSW-5:56 AMS232,197 mi
3
50%2:55 AMSE10:55 AMSW-6:55 AMS235,956 mi
4
45%3:27 AMSE12:12 PMWSW-7:49 AMS239,598 mi
5
35%3:50 AMESE1:28 PMWSW-8:38 AMS242,916 mi
6
25%4:08 AMESE2:41 PMWSW-9:23 AMS245,784 mi
7
17%4:24 AME3:51 PMW-10:06 AMS248,142 mi
8
10%4:38 AME5:00 PMW-10:46 AMS249,976 mi
9
5%4:51 AME6:09 PMW-11:26 AMS251,305 mi
10
2%5:05 AMENE7:17 PMWNW-12:07 PMS252,157 mi
11
0%5:21 AMENE8:26 PMWNW-12:48 PMS252,557 mi
12
0%5:39 AMENE9:36 PMNW-1:32 PMS252,516 mi
13
3%6:02 AMNE10:43 PMNW-2:18 PMS252,028 mi
14
7%6:32 AMNE11:47 PMNW-3:06 PMS251,068 mi
15
13%7:11 AMNE--3:56 PMS249,600 mi
16
20%-12:42 AMNW8:01 AMNE4:47 PMS247,599 mi
17
29%-1:28 AMNW9:02 AMNE5:38 PMS245,057 mi
18
39%-2:05 AMNW10:11 AMNE6:28 PMS242,009 mi
19
50%-2:33 AMWNW11:26 AMENE7:17 PMS238,546 mi
20
61%-2:56 AMWNW12:44 PMENE8:05 PMS234,828 mi
21
72%-3:15 AMWNW2:05 PMENE8:53 PMS231,087 mi
22
82%-3:32 AMW3:27 PME9:41 PMS227,615 mi
23
90%-3:49 AMW4:52 PME10:32 PMS224,746 mi
24
96%-4:07 AMWSW6:21 PMESE11:25 PMS222,800 mi
25
98%-4:28 AMWSW7:52 PMESE--
26
100%-4:54 AMWSW9:23 PMSE12:24 AMS222,029 mi
27
100%-5:30 AMSW10:48 PMSE1:27 AMS222,560 mi
28
96%-6:18 AMSW11:58 PMSE2:33 AMS224,354 mi
29
90%-7:21 AMSW-3:39 AMS227,210 mi
30
82%12:50 AMSE8:35 AMSW-4:43 AMS230,807 mi
31
72%1:28 AMSE9:54 AMSW-5:41 AMS234,775 mi

Humidity Comfort Levels in May 2021 in London

Humidity Comfort Levels in May 2021 in London18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAprJun
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The hourly reported humidity comfort level, categorized by dew point. The shaded overlays indicate night and civil twilight.

Wind Speed in May 2021 in London

Wind Speed in May 2021 in London1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph10 mph10 mph20 mph20 mph30 mph30 mph40 mph40 mph50 mph50 mphAprJun
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in May 2021 in London

Hourly Wind Speed in May 2021 in London18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAprJun
0 mph calm 1 mph light air 4 mph light breeze 8 mph gentle breeze 13 mph moderate breeze 18 mph fresh breeze 25 mph strong breeze 31 mph near gale 39 mph gale 47 mph strong gale 55 mph storm 64 mph violent storm 73 mph hurricane force
The hourly reported wind speed, color coded into bands according to the Beaufort scale. The shaded overlays indicate night and civil twilight.

Hourly Wind Direction in 2021 in London

Hourly Wind Direction in 2021 in London18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAprJun
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Atmospheric Pressure in May 2021 in London

Atmospheric Pressure in May 2021 in London18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.2 inHg29.2 inHg29.4 inHg29.4 inHg29.6 inHg29.6 inHg29.8 inHg29.8 inHg30.0 inHg30.0 inHg30.2 inHg30.2 inHg30.4 inHg30.4 inHgAprJun
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

The details of the data sources used for this report can be found on the London Heathrow Airport page.

See all nearby weather stations

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