| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 88°F | 51°F | n/a |
| February | 18°F | 86°F | 55°F | n/a |
| March | 27°F | 91°F | 63°F | 0.6" |
| April | 30°F | 97°F | 68°F | 0.9" |
| May | 43°F | 100°F | 75°F | 0.1" |
| June | 54°F | 104°F | 82°F | n/a |
| July | 57°F | 119°F | 83°F | 0.2" |
| August | 62°F | 113°F | 82°F | 0.0" |
| September | 52°F | 106°F | 77°F | 1.3" |
| October | 28°F | 95°F | 68°F | 1.6" |
| November | 25°F | 95°F | 61°F | 0.3" |
| December | 19°F | 93°F | 50°F | 0.3" |
| Index | Cameron | Texas | National |
| Air quality index | 36 | 52 | 50 |
| Pollution index | 692,760 | 4,642,916 | 5,066,862 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 321 |
| Days with moderate air quality | 43 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Milano, TX | 373 | 36 | 28% |
| Rogers, TX | 903 | 36 | 28% |
| Buckholts, TX | 411 | 36 | 28% |
| Rosebud, TX | 1,417 | 39 | 22% |
| Rockdale, TX | 5,492 | 41 | 18% |
| Cameron, TX | 5,457 | 36 | 28% |
| City, State | Population | Air Quality Index | National Avg. |
| Brush, CO | 5,458 | 41 | 18% |
| Anamosa, IA | 5,459 | 42 | 16% |
| Tichigan, WI | 5,459 | 35 | 30% |
| Colby, KS | 5,460 | 19 | 62% |
| Mulvane, KS | 5,461 | 39 | 22% |
| Cameron, TX | 5,457 | 36 | 28% |