| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 62°F | 45°F | 6.1" |
| February | 37°F | 66°F | 50°F | 3.1" |
| March | 46°F | 76°F | 59°F | 5.4" |
| April | 55°F | 83°F | 68°F | 6.5" |
| May | 61°F | 88°F | 74°F | 0.5" |
| June | 70°F | 94°F | 82°F | n/a |
| July | 71°F | 95°F | 82°F | n/a |
| August | 71°F | 96°F | 83°F | n/a |
| September | 65°F | 90°F | 76°F | 1.4" |
| October | 53°F | 81°F | 66°F | 3.3" |
| November | 44°F | 69°F | 55°F | 1.0" |
| December | 35°F | 62°F | 46°F | 2.1" |
| Index | Big Lake | Texas | National |
| Air quality index | 28 | 52 | 42 |
| Pollution index | 332,687 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 354 |
| Days with good air quality | 319 |
| Days with moderate air quality | 35 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Big Lake, TX | 3,302 | 28 | 44.0% |
| City | Population | Air Quality Index | National Avg. |
| Vine Hill, CA | 3,302 | 40 | 20.0% |
| Penrose, CO | 3,302 | 16 | 68.0% |
| Jackson, MN | 3,302 | 32 | 36.0% |
| Myerstown, PA | 3,301 | 42 | 16.0% |
| Georgetown, IL | 3,303 | 42 | 16.0% |
| Big Lake, TX | 3,302 | 28 | 44.0% |