| 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 | McAllen | 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. |
| Alamo, TX | 19,851 | 42 | 16.0% |
| La Homa, TX | 11,066 | 42 | 16.0% |
| West Sharyland, TX | 1,608 | 42 | 16.0% |
| Midway North, TX | 3,967 | 42 | 16.0% |
| South Alamo, TX | 2,532 | 42 | 16.0% |
| McAllen, TX | 142,557 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Syracuse, NY | 142,553 | 37 | 26.0% |
| Whitby, ON | 142,607 | n/a | |
| Mesquite, TX | 142,429 | 51 | 2.0% |
| Milton, ON | 142,128 | n/a | |
| Pasadena, CA | 142,017 | 72 | 44.0% |
| McAllen, TX | 142,557 | 42 | 16.0% |
Here are the best places to live in Texas
Top 10 cities in Texas with the best education system
Top 10 best public schools in McAllen
Check out the 10 safest cities in Texas