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January 1975 Weather History at London Heathrow Airport United Kingdom

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

London Heathrow Airport Temperature History January 1975

History:19771976JanFMAMJJASOND19741973
Temperature history in January 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313125°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°FDecFeb
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 January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Hourly Temperature in January 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFebvery coldcold
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 January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Cloud Cover in January 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
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 January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Observed Weather in January 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
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
Wed, Jan 1 Rain, Light Drizzle and Rain, Light Rain, Light DrizzleRA, -DZRA, -RA, -DZ
Thu, Jan 2 Drizzle, Light Drizzle, MistDZ, -DZ, BR
Fri, Jan 3 Drizzle, Light Drizzle, Fog in the VicinityDZ, -DZ, VCFG
Sat, Jan 4 Light Rain, Mist-RA, BR
Mon, Jan 6 Light Rain, Light Drizzle-RA, -DZ
Tue, Jan 7 Light Rain-RA
Wed, Jan 8 Light Rain-RA
Sat, Jan 11 Light Drizzle and Rain, Light Rain, Light Drizzle-DZRA, -RA, -DZ
Sun, Jan 12 Rain, Light RainRA, -RA
Mon, Jan 13 Light Rain, Light Drizzle-RA, -DZ
Tue, Jan 14 Rain, Light RainRA, -RA
Wed, Jan 15 Rain, Light RainRA, -RA
Thu, Jan 16 Rain, Light Drizzle and Rain, Light RainRA, -DZRA, -RA
Fri, Jan 17 Rain, Light RainRA, -RA
Sat, Jan 18 Heavy Rain, Rain, Light Rain+RA, RA, -RA
Sun, Jan 19 MistBR
Mon, Jan 20 Heavy Rain, Rain, Light Drizzle and Rain, Light Rain+RA, RA, -DZRA, -RA
Tue, Jan 21 Light Drizzle and Rain, Light Rain-DZRA, -RA
Wed, Jan 22 Drizzle and Rain, Rain, Light Drizzle and Rain, Light Rain, Showers of Light Rain, Light DrizzleDZRA, RA, -DZRA, -RA, -SHRA, -DZ
Thu, Jan 23 Showers of Light Rain-SHRA
Sat, Jan 25 Rain, Light Drizzle and Rain, Light RainRA, -DZRA, -RA
Sun, Jan 26 Light Rain, Showers of Light Rain, Light Drizzle-RA, -SHRA, -DZ
Mon, Jan 27 Heavy Rain, Rain, Light Rain+RA, RA, -RA
Tue, Jan 28 Light Rain and Snow, Heavy Rain, Rain, Light Drizzle and Rain, Light Rain-RASN, +RA, RA, -DZRA, -RA
Wed, Jan 29 Light Rain, Drizzle, Light Drizzle-RA, DZ, -DZ
Thu, Jan 30 Drizzle and Rain, Light Drizzle and Rain, Light Rain, Drizzle, Light DrizzleDZRA, -DZRA, -RA, DZ, -DZ
Fri, Jan 31 Heavy Rain, Rain, Light Rain, Showers of Light Rain+RA, RA, -RA, -SHRA

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

History:19771976JanFMAMJJASOND19741973
Hours of Daylight and Twilight in January 1975 at London Heathrow Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrDecFebnightnightdaydayJan 17 hr, 56 minJan 17 hr, 56 minJan 319 hr, 6 minJan 319 hr, 6 minJan 118 hr, 11 minJan 118 hr, 11 minJan 218 hr, 36 minJan 218 hr, 36 min
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 January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Sunrise & Sunset with Twilight in January 1975 at London Heathrow Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMDecFeb7:42 AM7:42 AMJan 314:48 PMJan 314:48 PM8:07 AM8:07 AMJan 14:03 PMJan 14:03 PM8:04 AM8:04 AMJan 114:15 PMJan 114:15 PM7:55 AM7:55 AMJan 214:31 PMJan 214:31 PM
The solar day over the course of January 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 January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Solar Elevation and Azimuth in January 1975 at London Heathrow AirportJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMDecFeb001010001010
northeastsouthwest
Solar elevation and azimuth over the course of January 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 January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Moon Rise, Set & Phases in January 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebDec 293:51 AMDec 293:51 AMJan 1210:20 AMJan 1210:20 AMJan 273:10 PMJan 273:10 PM3:33 PM3:33 PM8:05 AM8:05 AM7:42 AM7:42 AM4:46 PM4:46 PM5:01 PM5:01 PM7:44 AM7:44 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.
Jan 1975IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
88%-9:45 AMWNW8:57 PME2:44 AMS225,347 mi
2
79%-10:09 AMW10:18 PME3:36 AMS226,789 mi
3
68%-10:32 AMW11:38 PME4:28 AMS228,890 mi
4
50%-10:54 AMWSW-5:18 AMS231,407 mi
5
45%12:56 AMESE11:19 AMWSW-6:08 AMS234,118 mi
6
34%2:12 AMESE11:46 AMWSW-7:00 AMS236,848 mi
7
24%3:25 AMESE12:19 PMWSW-7:52 AMS239,479 mi
8
16%4:33 AMSE12:58 PMSW-8:46 AMS241,945 mi
9
9%5:34 AMSE1:46 PMSW-9:40 AMS244,215 mi
10
4%6:25 AMSE2:40 PMSW-10:33 AMS246,276 mi
11
1%7:08 AMSE3:41 PMWSW-11:24 AMS248,116 mi
12
0%7:42 AMESE4:46 PMWSW-12:14 PMS249,705 mi
13
1%8:10 AMESE5:51 PMWSW-1:00 PMS250,991 mi
14
4%8:33 AMESE6:57 PMWSW-1:45 PMS251,898 mi
15
9%8:54 AMESE8:03 PMW-2:27 PMS252,331 mi
16
15%9:12 AME9:08 PMW-3:08 PMS252,192 mi
17
23%9:30 AME10:13 PMW-3:49 PMS251,387 mi
18
31%9:48 AME11:19 PMWNW-4:30 PMS249,852 mi
19
41%10:08 AMENE--5:13 PMS247,567 mi
20
50%-12:26 AMWNW10:30 AMENE5:58 PMS244,570 mi
21
62%-1:35 AMWNW10:57 AMENE6:46 PMS240,975 mi
22
72%-2:44 AMWNW11:31 AMENE7:38 PMS236,979 mi
23
81%-3:52 AMNW12:14 PMNE8:33 PMS232,864 mi
24
90%-4:55 AMNW1:10 PMNE9:32 PMS228,982 mi
25
96%-5:50 AMNW2:18 PMNE10:31 PMS225,711 mi
26
99%-6:36 AMWNW3:36 PMENE11:30 PMS223,397 mi
27
100%-7:14 AMWNW5:01 PMENE--
28
100%-7:44 AMWNW6:27 PMENE12:28 AMS222,286 mi
29
97%-8:11 AMW7:53 PME1:23 AMS222,471 mi
30
91%-8:35 AMW9:17 PME2:17 AMS223,883 mi
31
83%-8:59 AMW10:39 PMESE3:10 AMS226,311 mi

Humidity Comfort Levels in January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Humidity Comfort Levels in January 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
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 January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Wind Speed in January 1975 at London Heathrow Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph10 mph10 mph20 mph20 mph30 mph30 mph40 mph40 mph50 mph50 mphDecFeb
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Hourly Wind Speed in January 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
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

History:19771976JanFMAMJJASOND19741973
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 AMDecFeb
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Atmospheric Pressure in January 1975 at London Heathrow Airport

History:19771976JanFMAMJJASOND19741973
Atmospheric Pressure in January 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.0 inHg29.0 inHg29.5 inHg29.5 inHg30.0 inHg30.0 inHg30.5 inHg30.5 inHg31.0 inHg31.0 inHgDecFeb
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

Reports by Month

Reports by Month at London Heathrow Airport194019501960197019801990200020102020194819481949194919501950195119511952195219531953195419541955195519561956195719571958195819731973197419741975197519761976197719771978197819791979198019801981198119821982198319831984198419851985198619861987198719881988198919891990199019911991199219921993199319941994199519951996199619971997199819981999199920002000200120012002200220032003200420042005200520062006200720072008200820092009201020102011201120122012201320132014201420152015201620162017201720182018201920192020202020212021202220222023202320242024
METARISDboth
The number of reports per month over the entire history of this station.

Number of Reports by Day in January 1975 at London Heathrow Airport Winter 1975

Number of Reports by Day in January 1975 at London Heathrow Airport181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131005050100100DecFeb
regularspecialcorrection
The number of reports per day.

Reports by Hour in January 1975 at London Heathrow Airport Winter 1975

Reports by Hour in January 1975 at London Heathrow Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
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 January 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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