Bueno, a juzgar por los récords de las limítrofes Texas y Nuevo México, más normal la -10 allí que en Marruecos sí debe ser:
TEXAS
Abilene -22.8 43.9
Amarillo -26.7 42.2
Austin -20.6 44.4
Brownsville -11.1 41.1
Corpus Christi -11.7 42.8
Dallas -23.3 46.1* * questioned
Del Rio -12.2 44.4
El Paso -22.2 45.6
Forth Worth -22.2 45
Galveston -13.3 40
Great Bend NP -19.4 40.6
Houston -15 43.3
Laredo -15 46.1
Lubbock -27.2 45.6
Midland -24.4 46.7
Monahans -22.8 48.9
Port Arthur -11.7 42.2
San Angelo -20 43.9
San Antonio -17.8 43.9
Seminole -30.6 45.6
Seymour -25.6 48.9
Tulia -30.6 43.3
Victoria -12.8 43.9
Waco -20.6 44.4
Wichita Falls -24.4 47.2
NEW MEXICO
Albuquerque -27.2 41.7
Artesia -28.9 46.7
Ciniza -49.4* * unofficial, dubious
Clayton -30.6 41.1
Gavilan -45.6 36.1
Gallup -36.7 38.3
Lakewood -28.9 50* * very dubious, taken with not proper instruments
Ochoa -21.1 47.8
Orogrande -25 46.7* * dubious
Roswell -33.9 45.6
Santa Fe -27.8 37.8
Silver City -25 41.1