| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 48°F | 33°F | 0.4" |
| February | 22°F | 51°F | 35°F | 0.4" |
| March | 27°F | 60°F | 43°F | 0.5" |
| April | 33°F | 66°F | 49°F | 0.5" |
| May | 40°F | 73°F | 56°F | 1.7" |
| June | 50°F | 85°F | 67°F | 1.5" |
| July | 54°F | 85°F | 69°F | 3.2" |
| August | 53°F | 83°F | 67°F | 3.2" |
| September | 47°F | 77°F | 61°F | 2.8" |
| October | 37°F | 68°F | 51°F | 1.2" |
| November | 27°F | 58°F | 42°F | 0.4" |
| December | 20°F | 48°F | 33°F | 0.5" |
| Index | North San Ysidro | New Mexico | National |
| Air quality index | 44 | 37 | 42 |
| Pollution index | 2,227,120 | 2,051,791 | 2,726,193 |
| Measurement | Total |
| Days measured | 362 |
| Days with good air quality | 274 |
| Days with moderate air quality | 87 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.050% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.005% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| La Cueva, NM | 472 | 44 | 12.0% |
| Ribera, NM | 516 | 44 | 12.0% |
| Sena, NM | 195 | 44 | 12.0% |
| Pecos, NM | 1,234 | 44 | 12.0% |
| San Jose, NM | 770 | 44 | 12.0% |
| North San Ysidro, NM | 48 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Tolsona, AK | 48 | 31 | 38.0% |
| Cardiff, AL | 48 | 53 | 6.0% |
| Garey, CA | 48 | 46 | 8.0% |
| New Pine Creek, CA | 48 | 29 | 42.0% |
| Frytown, IA | 48 | 35 | 30.0% |
| North San Ysidro, NM | 48 | 44 | 12.0% |