| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 59°F | 46°F | 3.2" |
| February | 41°F | 64°F | 50°F | 1.9" |
| March | 49°F | 71°F | 59°F | 2.6" |
| April | 56°F | 78°F | 66°F | 3.4" |
| May | 63°F | 84°F | 73°F | 4.4" |
| June | 71°F | 92°F | 81°F | 3.2" |
| July | 74°F | 95°F | 84°F | 1.9" |
| August | 74°F | 97°F | 85°F | 1.9" |
| September | 68°F | 90°F | 78°F | 3.1" |
| October | 57°F | 81°F | 68°F | 4.1" |
| November | 48°F | 70°F | 58°F | 1.9" |
| December | 39°F | 60°F | 48°F | 1.8" |
| Index | Frost | Texas | National |
| Air quality index | 41 | 52 | 42 |
| Pollution index | 1,309,490 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 275 |
| Days with moderate air quality | 80 |
| Days w/ poor A.Q. for sensitive groups | 7 |
| Days with unhealthy air quality | 3 |
| Pollutant | Total |
| Arsenic | 0.430% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.390% |
| City | Population | Air Quality Index | National Avg. |
| Bynum, TX | 333 | 38 | 24.0% |
| Emhouse, TX | 342 | 41 | 18.0% |
| Dawson, TX | 976 | 41 | 18.0% |
| Barry, TX | 254 | 41 | 18.0% |
| Italy, TX | 2,345 | 41 | 18.0% |
| Frost, TX | 910 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Walnut Grove, AL | 910 | 43 | 14.0% |
| Andale, KS | 910 | 40 | 20.0% |
| Arnold, NE | 910 | 19 | 62.0% |
| Montandon, PA | 910 | 35 | 30.0% |
| Red Rock, ON | 910 | n/a | |
| Frost, TX | 910 | 41 | 18.0% |