Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 39°F | 58°F | 47°F | 7.1" |
February | 42°F | 62°F | 51°F | 2.6" |
March | 51°F | 70°F | 60°F | 7.1" |
April | 58°F | 77°F | 67°F | 9.9" |
May | 66°F | 84°F | 74°F | 11.4" |
June | 75°F | 92°F | 83°F | 5.8" |
July | 77°F | 95°F | 86°F | 2.0" |
August | 78°F | 96°F | 87°F | 1.4" |
September | 71°F | 89°F | 80°F | 0.5" |
October | 60°F | 79°F | 69°F | 14.4" |
November | 50°F | 68°F | 58°F | 8.2" |
December | 40°F | 58°F | 48°F | 6.1" |
Index | Richardson | Texas | National |
Air quality index | 51 | 52 | 42 |
Pollution index | 3,706,540 | 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 | 0.002% |
Benzene | 0.040% |
Carbon Tetrachloride | 0.010% |
Lead | 0.040% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Highland Park, TX | 9,143 | 51 | 2.0% |
Travis Ranch, TX | 6,164 | 51 | 2.0% |
Carrollton, TX | 137,319 | 51 | 2.0% |
Plano, TX | 288,870 | 51 | 2.0% |
Cockrell Hill, TX | 4,200 | 51 | 2.0% |
Richardson, TX | 118,583 | 51 | 2.0% |
City | Population | Air Quality Index | National Avg. |
Sugar Land, TX | 118,563 | 52 | 4.0% |
Evansville, IN | 118,414 | 45 | 10.0% |
Waterloo, ON | 118,234 | n/a | |
Terrebonne, QC | 119,135 | n/a | |
Cambridge, MA | 117,822 | 43 | 14.0% |
Richardson, TX | 118,583 | 51 | 2.0% |