Temperature Monitoring Station:
NIIGATA 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		1.42
After quality control		1.40
After breakpoint alignment		1.00
Regional expectation during same months		0.96 ± 0.10
National average during same months		1.00 ± 0.11
Global land average during same months		1.07 ± 0.05

Regional Consistency

Comparison of monthly mean station data to regional expectation

	Typical Difference (°C, 95% range)	Correlation (R value)
Raw Monthly Anomalies	± 1.4	0.85
After Quality Control	± 1.4	0.85
After Breakpoint Adjustment	± 1.3	0.85

Quality Control Summary

Months missing 10 or more days	1
Serially repeated daily or monthly values	1
Extreme local outliers	2
Regional climatology outliers	2
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	2

Station ID Codes

FAA	RJSN
GHCND	JA000047604
GHCND	JAW00043318
GHCNM	21047604000
GSOD	475730-43318
GSOD	475730-99999
GSOD	476040-99999
GSOD	999999-43318
HADCRU	476040
ICAO	RJSN
NCDC	20029634
USAF	475730
USAF	476040
WBAN	43318
WMO	47573
WMO	47604
WMSSC	476040

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.