Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 27°F | 44°F | 35°F | 3.0" |
February | 27°F | 46°F | 35°F | 2.1" |
March | 36°F | 56°F | 45°F | 3.8" |
April | 46°F | 68°F | 56°F | 4.4" |
May | 53°F | 74°F | 63°F | 4.5" |
June | 61°F | 81°F | 70°F | 3.9" |
July | 64°F | 82°F | 72°F | 5.0" |
August | 64°F | 82°F | 72°F | 3.7" |
September | 57°F | 76°F | 66°F | 2.9" |
October | 47°F | 67°F | 56°F | 3.3" |
November | 37°F | 57°F | 46°F | 2.5" |
December | 31°F | 48°F | 39°F | 3.6" |
Index | Keystone | West Virginia | National |
Air quality index | 295 | 126 | 42 |
Pollution index | 655,580 | 1,996,538 | 2,726,193 |
Measurement | Total |
Days measured | 120 |
Days with good air quality | 106 |
Days with moderate air quality | 14 |
Days w/ poor A.Q. for sensitive groups | |
Days with unhealthy air quality |
Pollutant | Total |
Arsenic | 0.100% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.003% |
Lead | 0.010% |
Mercury | 0.005% |
City | Population | Air Quality Index | National Avg. |
War, WV | 652 | 295 | 490.0% |
Roderfield, WV | 111 | 295 | 490.0% |
Bramwell, WV | 313 | 295 | 490.0% |
Corinne, WV | 99 | 295 | 490.0% |
New Richmond, WV | 289 | 295 | 490.0% |
Keystone, WV | 84 | 295 | 490.0% |
City | Population | Air Quality Index | National Avg. |
Blue Springs, AL | 84 | 35 | 30.0% |
Graham, AL | 84 | 38 | 24.0% |
Moccasin, AZ | 84 | 44 | 12.0% |
Sierra City, CA | 84 | 44 | 12.0% |
Joes, CO | 84 | 58 | 16.0% |
Keystone, WV | 84 | 295 | 490.0% |