Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 34°F | 56°F | 44°F | 2.5" |
February | 38°F | 60°F | 47°F | 2.1" |
March | 47°F | 69°F | 56°F | 2.9" |
April | 54°F | 76°F | 64°F | 4.7" |
May | 61°F | 82°F | 71°F | 5.6" |
June | 71°F | 91°F | 81°F | 4.5" |
July | 74°F | 95°F | 84°F | 3.1" |
August | 74°F | 96°F | 84°F | 3.1" |
September | 67°F | 89°F | 77°F | 2.9" |
October | 56°F | 79°F | 66°F | 3.1" |
November | 46°F | 67°F | 56°F | 2.9" |
December | 37°F | 56°F | 45°F | 2.6" |
Index | Knollwood | Texas | National |
Air quality index | 325 | 52 | 42 |
Pollution index | 8,884,190 | 2,009,300 | 2,726,193 |
Measurement | Total |
Days measured | 138 |
Days with good air quality | 120 |
Days with moderate air quality | 17 |
Days w/ poor A.Q. for sensitive groups | 1 |
Days with unhealthy air quality |
Pollutant | Total |
Arsenic | 0.030% |
Benzene | 0.070% |
Carbon Tetrachloride | 0.040% |
Lead | 0.260% |
Mercury | 0.020% |
City | Population | Air Quality Index | National Avg. |
Achille, OK | 376 | 325 | 550.0% |
Denison, TX | 24,851 | 325 | 550.0% |
Dorchester, TX | 39 | 325 | 550.0% |
Bells, TX | 1,824 | 325 | 550.0% |
Southmayd, TX | 1,510 | 325 | 550.0% |
Knollwood, TX | 405 | 325 | 550.0% |
City | Population | Air Quality Index | National Avg. |
Pinedale, AZ | 405 | 44 | 12.0% |
Ila, GA | 405 | 44 | 12.0% |
Sale City, GA | 405 | 40 | 20.0% |
Plainfield, IA | 405 | 39 | 22.0% |
Good Hope, IL | 405 | 29 | 42.0% |
Knollwood, TX | 405 | 325 | 550.0% |