| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 60°F | 47°F | 10.0" |
| February | 38°F | 64°F | 50°F | 9.7" |
| March | 46°F | 72°F | 58°F | 7.8" |
| April | 53°F | 79°F | 66°F | 7.6" |
| May | 60°F | 86°F | 72°F | 6.2" |
| June | 69°F | 92°F | 79°F | 10.6" |
| July | 71°F | 93°F | 81°F | 11.1" |
| August | 71°F | 92°F | 80°F | 9.4" |
| September | 65°F | 87°F | 75°F | 8.5" |
| October | 53°F | 79°F | 65°F | 5.4" |
| November | 42°F | 70°F | 54°F | 6.9" |
| December | 40°F | 64°F | 51°F | 11.6" |
| Index | Montrose | Georgia | National |
| Air quality index | 38 | 41 | 42 |
| Pollution index | 1,649,070 | 1,874,972 | 2,726,193 |
| Measurement | Total |
| Days measured | 354 |
| Days with good air quality | 246 |
| Days with moderate air quality | 106 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.050% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Danville, GA | 201 | 38 | 24.0% |
| Chester, GA | 727 | 38 | 24.0% |
| Dudley, GA | 596 | 38 | 24.0% |
| Cochran, GA | 4,945 | 38 | 24.0% |
| Jeffersonville, GA | 997 | 38 | 24.0% |
| Montrose, GA | 342 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Oliver, GA | 342 | 39 | 22.0% |
| Persia, IA | 342 | 40 | 20.0% |
| Alto Pass, IL | 342 | 44 | 12.0% |
| Williamsburg, KS | 342 | 22 | 56.0% |
| Brownsboro Village, KY | 342 | 49 | 2.0% |
| Montrose, GA | 342 | 38 | 24.0% |
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