| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 60°F | 46°F | 2.7" |
| February | 41°F | 65°F | 51°F | 1.8" |
| March | 49°F | 72°F | 59°F | 2.3" |
| April | 57°F | 80°F | 67°F | 3.6" |
| May | 63°F | 85°F | 73°F | 4.6" |
| June | 73°F | 94°F | 83°F | 4.3" |
| July | 76°F | 98°F | 87°F | 2.1" |
| August | 77°F | 99°F | 87°F | 2.6" |
| September | 69°F | 92°F | 80°F | 3.2" |
| October | 58°F | 82°F | 69°F | 3.4" |
| November | 48°F | 70°F | 58°F | 2.5" |
| December | 40°F | 61°F | 49°F | 2.6" |
| Index | North Richland Hills | Texas | National |
| Air quality index | 51 | 52 | 42 |
| Pollution index | 453,692 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 181 |
| Days with moderate air quality | 155 |
| Days w/ poor A.Q. for sensitive groups | 28 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.005% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| River Oaks, TX | 7,830 | 33 | 34.0% |
| Newark, TX | 1,223 | 33 | 34.0% |
| Westover Hills, TX | 771 | 33 | 34.0% |
| Sansom Park, TX | 5,730 | 33 | 34.0% |
| Benbrook, TX | 24,155 | 33 | 34.0% |
| North Richland Hills, TX | 72,121 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Walnut Creek, CA | 72,134 | 40 | 20.0% |
| Passaic, NJ | 72,139 | 51 | 2.0% |
| Marysville, WA | 71,855 | 24 | 52.0% |
| St. Charles, MO | 72,409 | 54 | 8.0% |
| Wilmington, DE | 72,823 | 51 | 2.0% |
| North Richland Hills, TX | 72,121 | 51 | 2.0% |