| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 55°F | 42°F | 2.7" |
| February | 31°F | 58°F | 44°F | 2.6" |
| March | 39°F | 67°F | 52°F | 4.3" |
| April | 48°F | 76°F | 62°F | 4.1" |
| May | 56°F | 82°F | 68°F | 4.1" |
| June | 65°F | 90°F | 77°F | 4.8" |
| July | 69°F | 93°F | 80°F | 5.2" |
| August | 69°F | 91°F | 79°F | 4.9" |
| September | 62°F | 85°F | 72°F | 5.5" |
| October | 49°F | 75°F | 61°F | 3.4" |
| November | 38°F | 66°F | 51°F | 3.8" |
| December | 34°F | 58°F | 45°F | 4.1" |
| Index | Apex | North Carolina | National |
| Air quality index | 46 | 35 | 42 |
| Pollution index | 2,015,140 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 239 |
| Days with moderate air quality | 126 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.000% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Moncure, NC | 798 | 29 | 42.0% |
| Fearrington Village, NC | 2,692 | 44 | 12.0% |
| Morrisville, NC | 27,582 | 44 | 12.0% |
| Carrboro, NC | 21,254 | 44 | 12.0% |
| Chapel Hill, NC | 61,912 | 44 | 12.0% |
| Apex, NC | 55,220 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Gilroy, CA | 55,227 | 37 | 26.0% |
| Carson City, NV | 55,244 | 41 | 18.0% |
| Chicopee, MA | 55,186 | 40 | 20.0% |
| Kettering, OH | 55,271 | 47 | 6.0% |
| Hempstead, NY | 55,153 | 51 | 2.0% |
| Apex, NC | 55,220 | 46 | 8.0% |
Here are the best places to live in North Carolina
These are the largest cities in North Carolina
See the best places to live in Apex
Most Dangerous Cities In The US