| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 52°F | 40°F | 3.3" |
| February | 32°F | 56°F | 43°F | 2.5" |
| March | 40°F | 64°F | 51°F | 3.7" |
| April | 48°F | 73°F | 60°F | 4.6" |
| May | 56°F | 80°F | 68°F | 5.4" |
| June | 64°F | 87°F | 75°F | 4.1" |
| July | 68°F | 89°F | 77°F | 5.7" |
| August | 67°F | 87°F | 76°F | 4.2" |
| September | 61°F | 82°F | 70°F | 3.5" |
| October | 49°F | 73°F | 60°F | 3.9" |
| November | 38°F | 63°F | 49°F | 3.2" |
| December | 34°F | 55°F | 44°F | 4.5" |
| Index | Hickory | North Carolina | National |
| Air quality index | 43 | 35 | 42 |
| Pollution index | 1,564,530 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 275 |
| Days with moderate air quality | 90 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Maiden, NC | 3,413 | 36 | 28.0% |
| Claremont, NC | 1,924 | 43 | 14.0% |
| Long View, NC | 4,898 | 43 | 14.0% |
| Connelly Springs, NC | 2,272 | 43 | 14.0% |
| Valdese, NC | 4,420 | 43 | 14.0% |
| Hickory, NC | 41,067 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Oviedo, FL | 41,062 | 37 | 26.0% |
| Manassas, VA | 41,038 | 47 | 6.0% |
| Findlay, OH | 41,098 | 39 | 22.0% |
| Weslaco, TX | 41,103 | 42 | 16.0% |
| Shelton, CT | 41,162 | 41 | 18.0% |
| Hickory, NC | 41,067 | 43 | 14.0% |
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