| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 60°F | 48°F | 5.0" |
| February | 41°F | 63°F | 50°F | 5.2" |
| March | 49°F | 72°F | 59°F | 5.7" |
| April | 56°F | 79°F | 66°F | 5.5" |
| May | 63°F | 84°F | 73°F | 4.9" |
| June | 71°F | 91°F | 80°F | 3.6" |
| July | 73°F | 92°F | 81°F | 4.4" |
| August | 73°F | 93°F | 82°F | 4.0" |
| September | 68°F | 89°F | 77°F | 3.6" |
| October | 55°F | 79°F | 66°F | 3.5" |
| November | 46°F | 69°F | 56°F | 4.0" |
| December | 41°F | 62°F | 50°F | 5.3" |
| Index | Northgate | Jackson | Mississippi |
| Air quality index | 44 | 44 | 40 |
| Pollution index | 5,784,070 | 5,784,070 | 1,514,109 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 256 |
| Days with moderate air quality | 109 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.005% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.030% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Richland, MS | 7,203 | 44 | 12.0% |
| Raymond, MS | 2,007 | 44 | 12.0% |
| Flowood, MS | 9,213 | 44 | 12.0% |
| Ridgeland, MS | 24,194 | 44 | 12.0% |
| Brandon, MS | 24,088 | 44 | 12.0% |
| Jackson, MS | 163,778 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Greater Sudbury, ON | 165,562 | n/a | |
| Fort Collins, CO | 166,069 | 48 | 4.0% |
| Abbotsford, BC | 160,174 | n/a | |
| Coquitlam, BC | 159,980 | n/a | |
| Springfield, MO | 167,601 | 39 | 22.0% |
| Jackson, MS | 163,778 | 44 | 12.0% |
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