| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 51°F | 74°F | 61°F | 1.0" |
| February | 56°F | 78°F | 65°F | 0.8" |
| March | 62°F | 84°F | 71°F | 1.0" |
| April | 68°F | 89°F | 77°F | 1.5" |
| May | 73°F | 93°F | 81°F | 2.1" |
| June | 77°F | 97°F | 85°F | 1.8" |
| July | 78°F | 98°F | 86°F | 3.3" |
| August | 78°F | 99°F | 87°F | 1.8" |
| September | 75°F | 95°F | 83°F | 4.6" |
| October | 68°F | 90°F | 78°F | 1.6" |
| November | 60°F | 82°F | 70°F | 1.1" |
| December | 54°F | 75°F | 63°F | 1.4" |
| Index | Hidalgo | Texas | National |
| Air quality index | 42 | 52 | 42 |
| Pollution index | 7,136,530 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 243 |
| Days with moderate air quality | 120 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| César Chávez, TX | 709 | 42 | 16.0% |
| Murillo, TX | 9,331 | 42 | 16.0% |
| Campo Verde, TX | 169 | 42 | 16.0% |
| West Sharyland, TX | 1,608 | 42 | 16.0% |
| Midway North, TX | 3,967 | 42 | 16.0% |
| Hidalgo, TX | 13,984 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Sainte-Marie, QC | 13,983 | n/a | |
| Circleville, OH | 13,986 | 46 | 8.0% |
| Oak Park, CA | 13,987 | 72 | 44.0% |
| Bayou Blue, LA | 13,997 | 41 | 18.0% |
| Wixom, MI | 13,970 | 40 | 20.0% |
| Hidalgo, TX | 13,984 | 42 | 16.0% |
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