Temperature Monitoring Station:
SAN JUAN CITY

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		1.21
After quality control		1.20
After breakpoint alignment		1.06
Regional expectation during same months		1.08 ± 0.25
National average during same months		-
Global land average during same months		1.09 ± 0.05

Regional Consistency

Comparison of monthly mean station data to regional expectation

	Typical Difference (°C, 95% range)	Correlation (R value)
Raw Monthly Anomalies	± 0.7	0.83
After Quality Control	± 0.7	0.83
After Breakpoint Adjustment	± 0.6	0.86

Quality Control Summary

Months missing 10 or more days	24
Serially repeated daily or monthly values	18
Extreme local outliers	0
Regional climatology outliers	0
Abrupt jumps	1
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	27

Station ID Codes

COOP	668808
GHCND	RQW00011618
GHCND	RQW00011631
GSOD	994043-99999
GSOD	998489-99999
GSOD	999999-11618
GSOD	999999-11631
ICAO	41053
ICAO	SJNP4
NCDC	20023999
NCDC	20024001
USAF	994043
USAF	998489
WBAN	11618
WBAN	11631

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.