| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 54°F | 42°F | 4.5" |
| February | 35°F | 57°F | 45°F | 3.7" |
| March | 44°F | 67°F | 55°F | 5.4" |
| April | 52°F | 77°F | 64°F | 5.9" |
| May | 61°F | 83°F | 72°F | 5.8" |
| June | 71°F | 92°F | 81°F | 3.6" |
| July | 73°F | 93°F | 83°F | 4.6" |
| August | 73°F | 93°F | 83°F | 3.9" |
| September | 66°F | 88°F | 76°F | 3.4" |
| October | 53°F | 78°F | 64°F | 3.7" |
| November | 42°F | 66°F | 53°F | 4.2" |
| December | 35°F | 56°F | 45°F | 5.6" |
| Index | Germantown | Tennessee | National |
| Air quality index | 45 | 76 | 42 |
| Pollution index | 20,539,300 | 2,454,916 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 221 |
| Days with moderate air quality | 139 |
| Days w/ poor A.Q. for sensitive groups | 5 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.210% |
| Carbon Tetrachloride | 0.060% |
| Lead | 0.170% |
| Mercury | 0.110% |
| City | Population | Air Quality Index | National Avg. |
| Bartlett, TN | 59,252 | 45 | 10.0% |
| Lakeland, TN | 12,644 | 45 | 10.0% |
| Bridgetown, MS | 2,580 | 45 | 10.0% |
| Southaven, MS | 55,026 | 45 | 10.0% |
| Oakland, TN | 8,135 | 45 | 10.0% |
| Germantown, TN | 39,196 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Northglenn, CO | 39,201 | 58 | 16.0% |
| Port Moody, BC | 39,217 | n/a | |
| South Valley, NM | 39,150 | 53 | 6.0% |
| Roy, UT | 39,243 | 45 | 10.0% |
| Milton, GA | 39,252 | 52 | 4.0% |
| Germantown, TN | 39,196 | 45 | 10.0% |
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