| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 59°F | 46°F | 2.9" |
| February | 40°F | 63°F | 50°F | 2.1" |
| March | 49°F | 71°F | 59°F | 4.7" |
| April | 56°F | 78°F | 66°F | 3.6" |
| May | 64°F | 85°F | 73°F | 4.4" |
| June | 72°F | 93°F | 82°F | 4.2" |
| July | 74°F | 96°F | 84°F | 2.1" |
| August | 75°F | 97°F | 85°F | 2.3" |
| September | 68°F | 90°F | 78°F | 2.6" |
| October | 56°F | 81°F | 67°F | 4.1" |
| November | 47°F | 69°F | 57°F | 2.8" |
| December | 39°F | 60°F | 48°F | 3.2" |
| Index | Canton | Texas | National |
| Air quality index | 36 | 52 | 42 |
| Pollution index | 37,723,200 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 326 |
| Days with moderate air quality | 37 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.290% |
| Carbon Tetrachloride | 0.220% |
| Lead | 0.230% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Van, TX | 2,706 | 36 | 28.0% |
| Grand Saline, TX | 3,148 | 36 | 28.0% |
| Callender Lake, TX | 808 | 36 | 28.0% |
| Edgewood, TX | 1,759 | 36 | 28.0% |
| Edom, TX | 335 | 36 | 28.0% |
| Canton, TX | 3,888 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Butte, AK | 3,888 | 31 | 38.0% |
| Saint-Ambroise, QC | 3,888 | n/a | |
| Colorado City, TX | 3,887 | 28 | 44.0% |
| Métabetchouan--Lac-à-la-Croix, QC | 3,887 | n/a | |
| Angels, CA | 3,889 | 39 | 22.0% |
| Canton, TX | 3,888 | 36 | 28.0% |
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