Regions of New Mexico

The Sandias rise 5,000 feet off the east edge of the city, and the mountain is in a different climate from the valley: the crest averages far more snow than the airport six miles away and 4,300 feet below it. The Rio Grande bosque runs the length of the metro and sets the overnight lows, and the gap at Tijeras Canyon funnels the wind that fans every fire on the east side.

This is the hottest, driest corner of the state and the one the monsoon reaches first: the moisture comes up from the Gulf of California in early July and the Organ Mountains wring it out over the valley in the afternoon. The rest of the year the wind runs down the Rio Grande and the dust off the Chihuahuan playas closes I-10 west of Las Cruces most springs.

Santa Fe is the highest state capital in the country at 7,200 feet, and the Sangre de Cristos behind it hold snow into June. This is also where the state's fire history is written: the Cerro Grande fire came out of Los Alamos in 2000, and Hermits Peak–Calf Canyon above Las Vegas became the largest wildfire in New Mexico history in 2022 — both of them started as prescribed burns that the wind took.

Most of this is the Navajo Nation, and most of it is over 6,000 feet: high desert that takes its water from the San Juan and from a monsoon that arrives late and unevenly. The Chuska Mountains on the Arizona line are the wettest ground for a hundred miles in any direction, and the winter inversions in the San Juan Basin hold smoke and haze in the valley for days.

This is the New Mexico end of the Permian Basin, and it is the busiest oilfield in the world sitting on top of the most flood-prone river in the state. The Pecos comes down out of the Sangre de Cristos and floods on monsoon rain that fell two hundred miles away; the 1966 flood took out most of Carlsbad's bridges. Above ground it is hot, windy and dusty; below it is Carlsbad Caverns at a constant 56 degrees.

Roswell sits where the Llano Estacado meets the Pecos, which makes it one of the sharpest gradients in the state: Ruidoso in the Sacramentos, sixty miles west and 5,000 feet up, is a ski town, and Roswell is high desert at 3,600 feet. The Capitans hold the snow and the Hondo carries it down. It is also the eastern edge of the monsoon, where the storms arrive already organised.

This is the only part of New Mexico that behaves like the Great Plains, and it gets the weather to match: it sits at the western end of the Llano Estacado, takes the dryline in spring and the supercells that fire on it, and is the one corner of the state with a real tornado climatology. The caprock escarpment north of Tucumcari is where the plains stop and New Mexico starts.

Otero County holds the sharpest elevation change in New Mexico: White Sands on the basin floor at 4,000 feet and Cloudcroft on the rim at 8,600, twenty miles apart. Cloudcroft averages more than double Alamogordo's precipitation and takes real snow while the basin below takes none. The gypsum dunes are their own microclimate, and the basin's spring winds lift them.

Wheeler Peak at 13,161 feet is the highest ground in New Mexico and the snowiest: Taos Ski Valley below it averages over 300 inches. Raton Pass on I-25 is the other story — 7,834 feet on the Colorado line, the first thing to close in a winter storm, and the pass every forecast for the northern half of the state has to account for.

The Gila was the first designated wilderness anywhere in the world, and it is still the emptiest quarter of New Mexico — Catron County is 6,900 square miles with under 4,000 people on it. The Mogollon Rim catches the monsoon before anywhere else in the state, which makes this the wettest ground in southern New Mexico and, in the dry months before it arrives, the most reliable place in the state to have a very large fire.

Socorro County is bigger than Connecticut and Rhode Island together with sixteen thousand people on it. The Bosque del Apache on the Rio Grande takes tens of thousands of sandhill cranes and snow geese every winter, and the Plains of San Agustin west of it are flat, high and dry enough that the Very Large Array was built there — the same clear, still air that makes the radio astronomy work makes the overnight temperature swings some of the widest in the state.