Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 25°F | 39°F | 32°F | 8.6" |
February | 19°F | 35°F | 27°F | 2.8" |
March | 32°F | 52°F | 41°F | 7.3" |
April | 40°F | 63°F | 51°F | 6.0" |
May | 48°F | 75°F | 62°F | 4.9" |
June | 61°F | 84°F | 73°F | 6.4" |
July | 63°F | 85°F | 74°F | 6.1" |
August | 65°F | 87°F | 75°F | 8.0" |
September | 56°F | 81°F | 68°F | 6.4" |
October | 48°F | 67°F | 57°F | 4.5" |
November | 34°F | 54°F | 44°F | 4.0" |
December | 24°F | 38°F | 31°F | 3.4" |
Index | Westerville | Ohio | National |
Air quality index | 46 | 40 | 42 |
Pollution index | 21,574,800 | 4,472,386 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 237 |
Days with moderate air quality | 127 |
Days w/ poor A.Q. for sensitive groups | 1 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.030% |
Benzene | 0.230% |
Carbon Tetrachloride | 0.100% |
Lead | 0.190% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Centerburg, OH | 1,930 | 41 | 18.0% |
Hartford, OH | 355 | 41 | 18.0% |
Kilbourne, OH | 14 | 46 | 8.0% |
Columbus, OH | 889,079 | 46 | 8.0% |
Hilliard, OH | 37,023 | 46 | 8.0% |
Westerville, OH | 40,443 | 46 | 8.0% |
City | Population | Air Quality Index | National Avg. |
Lancaster, OH | 40,438 | 46 | 8.0% |
Huber Heights, OH | 40,465 | 47 | 6.0% |
Covington, KY | 40,466 | 54 | 8.0% |
Wentzville, MO | 40,407 | 54 | 8.0% |
New Tecumseth, ON | 40,488 | n/a | |
Westerville, OH | 40,443 | 46 | 8.0% |