Temperature Monitoring Station:
LONDON AIRPORT

Monthly Mean Temperature Data

Raw Data relative to Expected Monthly Means

Difference from Regional Expectation

Breakpoint Adjusted Annual Average Comparison

Mean Rate of Change ( °C / Century )

Raw monthly anomalies		0.46
After quality control		0.40
After breakpoint alignment		1.02
Regional expectation during same months		1.02 ± 0.14
National average during same months		1.52 ± 0.14
Global land average during same months		1.04 ± 0.05

Regional Consistency

Comparison of monthly mean station data to regional expectation

	Typical Difference (°C, 95% range)	Correlation (R value)
Raw Monthly Anomalies	± 1.9	0.89
After Quality Control	± 1.8	0.90
After Breakpoint Adjustment	± 1.7	0.91

Quality Control Summary

Months missing 10 or more days	27
Serially repeated daily or monthly values	9
Extreme local outliers	0
Regional climatology outliers	1
Abrupt jumps	0
Marked as bad or manually changed by source	0
Exceeds global climatological range	0
Isolated observations	0
Frame shift repetitions	0
TMAX / TMIN inconsistency	0
TAVG outside TMAX / TMIN range	0
Total Observations Rejected by Quality Control	28

Station ID Codes

FAA	CYXU
GHCND	CA006144470
GHCND	CA006144475
GHCND	CA006144478
GHCND	CA006144505
GHCNM	40371623003
GSOD	716220-99999
GSOD	716230-94805
GSOD	716230-99999
GSOD	726230-99999
HADCRU	716230
ICAO	CWSN
ICAO	CYXU
NCDC	20028670
USAF	716220
USAF	716230
USAF	726230
WBAN	94805
WMO	71622
WMO	71623
WMO	72623
WWR	71623

ID codes may be repeated if the identification of the station changed during its history or if two different records were found to contain the same data, in which case the records would be merged.