May 1975 Weather History at London Heathrow Airport United Kingdom

This report shows the past weather for London Heathrow Airport, providing a weather history for May 1975. It features all historical weather data series we have available, including the London Heathrow Airport temperature history for May 1975. You can drill down from year to month and even day level reports by clicking on the graphs.

London Heathrow Airport Temperature History May 1975

Temperature history in May 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313135°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 1975 at London Heathrow Airport

Hourly Temperature in May 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAprJuncoldcoolvery cold
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 1975 at London Heathrow Airport

Cloud Cover in May 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 1975 at London Heathrow Airport

Observed Weather in May 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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
Thu, May 1 Light Rain-RA
Fri, May 2 Heavy Rain, Rain, Showers of Rain, Light Rain, Showers of Light Rain+RA, RA, SHRA, -RA, -SHRA
Sat, May 3 Light Rain-RA
Sun, May 4 Light Rain-RA
Tue, May 6 Thunderstorm with Heavy Hail+TSGR
Wed, May 7 Rain, Light Rain, Light DrizzleRA, -RA, -DZ
Thu, May 8 Light Drizzle and Rain, Light Rain, Light Drizzle-DZRA, -RA, -DZ
Fri, May 9 Light Drizzle and Rain, Drizzle-DZRA, DZ
Sat, May 10 Light Rain, Drizzle, Fog, Mist-RA, DZ, FG, BR
Sun, May 11 Light Drizzle-DZ
Mon, May 12 Rain, Light Drizzle and Rain, Light Rain, Drizzle, Light DrizzleRA, -DZRA, -RA, DZ, -DZ
Tue, May 13 Light Drizzle and Rain, Light Rain-DZRA, -RA
Wed, May 14 Thunderstorm with Rain, Showers of Light RainTSRA, -SHRA
Thu, May 15 Heavy Rain, Rain, Light Rain, Showers of Light Rain, Drizzle, Mist+RA, RA, -RA, -SHRA, DZ, BR
Fri, May 16 Rain, Light Drizzle and Rain, Light Rain, Light DrizzleRA, -DZRA, -RA, -DZ
Sat, May 17 Heavy Rain, Rain, Light Drizzle and Rain, Light Rain, Light Drizzle+RA, RA, -DZRA, -RA, -DZ
Sun, May 18 Light Rain, Drizzle, Light Drizzle-RA, DZ, -DZ
Mon, May 19 Drizzle, Light Drizzle, Mist, Shallow Patches of FogDZ, -DZ, BR, MIBCFG
Tue, May 20 DrizzleDZ
Wed, May 21 DrizzleDZ
Thu, May 22 Light Rain-RA
Fri, May 23 Showers of Light Rain, Fog in the Vicinity-SHRA, VCFG
Sat, May 24 Showers of Light Rain-SHRA
Sun, May 25 Light Rain-RA
Mon, May 26 Light Rain-RA
Tue, May 27 Light Rain-RA
Wed, May 28 Light Rain-RA
Thu, May 29 Light Rain, Light Drizzle-RA, -DZ
Fri, May 30 Light Drizzle and Rain-DZRA

Hours of Daylight and Twilight in May 1975 at London Heathrow Airport

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 1975 at London Heathrow Airport

The solar day over the course of May 1975. 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 1975 at London Heathrow Airport

Solar Elevation and Azimuth in May 1975 at London Heathrow AirportMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 1975. 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 1975 at London Heathrow Airport

Moon Rise, Set & Phases in May 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAprJunApr 258:55 PMApr 258:55 PMMay 118:05 AMMay 118:05 AMMay 256:51 AMMay 256:51 AM8:15 PM8:15 PM5:48 AM5:48 AM5:12 AM5:12 AM9:12 PM9:12 PM8:23 PM8:23 PM5:02 AM5:02 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 1975IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
69%1:13 AMESE10:12 AMWSW-5:42 AMS244,861 mi
2
60%1:45 AMESE11:17 AMWSW-6:31 AMS247,665 mi
3
50%2:12 AMESE12:23 PMWSW-7:17 AMS249,770 mi
4
40%2:34 AMESE1:28 PMWSW-8:00 AMS251,072 mi
5
31%2:54 AME2:33 PMW-8:42 AMS251,542 mi
6
22%3:13 AME3:37 PMW-9:23 AMS251,215 mi
7
15%3:32 AME4:43 PMW-10:05 AMS250,182 mi
8
8%3:52 AMENE5:49 PMWNW-10:47 AMS248,575 mi
9
4%4:14 AMENE6:57 PMWNW-11:32 AMS246,550 mi
10
1%4:40 AMENE8:05 PMWNW-12:19 PMS244,271 mi
11
0%5:12 AMENE9:12 PMWNW-1:08 PMS241,896 mi
12
2%5:51 AMNE10:14 PMNW-2:00 PMS239,560 mi
13
6%6:39 AMNE11:10 PMNW-2:55 PMS237,360 mi
14
12%7:37 AMNE11:57 PMWNW-3:50 PMS235,359 mi
15
21%8:44 AMENE--4:44 PMS233,583 mi
16
31%-12:36 AMWNW9:58 AMENE5:38 PMS232,046 mi
17
42%-1:09 AMWNW11:15 AMENE6:30 PMS230,758 mi
18
50%-1:37 AMWNW12:33 PMENE7:21 PMS229,753 mi
19
66%-2:02 AMW1:52 PME8:11 PMS229,089 mi
20
76%-2:25 AMW3:12 PME9:02 PMS228,849 mi
21
86%-2:49 AMW4:32 PMESE9:55 PMS229,129 mi
22
93%-3:15 AMWSW5:52 PMESE10:49 PMS230,009 mi
23
98%-3:45 AMWSW7:09 PMESE11:45 PMS231,528 mi
24
99%-4:20 AMWSW8:23 PMESE--
25
100%-5:02 AMSW9:28 PMSE12:43 AMS233,658 mi
26
99%-5:53 AMSW10:23 PMSE1:40 AMS236,292 mi
27
96%-6:51 AMSW11:08 PMESE2:37 AMS239,249 mi
28
91%-7:55 AMWSW11:44 PMESE3:31 AMS242,300 mi
29
84%-9:01 AMWSW-4:22 AMS245,198 mi
30
76%12:13 AMESE10:08 AMWSW-5:10 AMS247,708 mi
31
67%12:37 AMESE11:14 AMWSW-5:55 AMS249,630 mi

Humidity Comfort Levels in May 1975 at London Heathrow Airport

Humidity Comfort Levels in May 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 1975 at London Heathrow Airport

Wind Speed in May 1975 at London Heathrow Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph10 mph10 mph20 mph20 mph30 mph30 mph40 mph40 mphAprJun
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in May 1975 at London Heathrow Airport

Hourly Wind Speed in May 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 1975 at London Heathrow Airport

Hourly Wind Direction in 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 1975 at London Heathrow Airport

Atmospheric Pressure in May 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.4 inHg29.4 inHg29.6 inHg29.6 inHg29.8 inHg29.8 inHg30.0 inHg30.0 inHg30.2 inHg30.2 inHg30.4 inHg30.4 inHg30.6 inHg30.6 inHgAprJun
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

Number of Reports by Day in May 1975 at London Heathrow Airport Spring 1975

regularspecialcorrection
The number of reports per day.

Reports by Hour in May 1975 at London Heathrow Airport Spring 1975

Reports by Hour in May 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMAprJun
regularspecialcorrection
Indication of what types of reports were recorded during each hour.

This report graphically illustrates the historical weather reports recorded by the weather station at London Heathrow Airport in May 1975.

METAR Reports

Airport weather stations throughout the world routinely issue METAR weather reports . Such reports are used by pilots, air traffic controllers, meteorologists, climatologists, and other researchers. They are published via radio transmission and on the internet. We have been collecting and archiving published METAR reports since 2011, and have found third-party sources for archived reports from years prior to that.

ISD Reports

The Integrated Surface Database (ISD), maintained and published by NOAA's National Center for Environmental Information , consists of hourly and synoptic weather reports from a variety of sources. We use ISD data to complement and backfill for our METAR archive.

Other Data

The sources for the averages shown in the daily temperature chart are discussed in greater detail on this station's Averages Report.

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

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