| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 46°F | 36°F | 6.6" |
| February | 30°F | 49°F | 38°F | 4.5" |
| March | 39°F | 60°F | 48°F | 6.1" |
| April | 47°F | 70°F | 58°F | 6.7" |
| May | 55°F | 76°F | 65°F | 6.9" |
| June | 62°F | 83°F | 72°F | 6.7" |
| July | 65°F | 85°F | 74°F | 7.9" |
| August | 65°F | 84°F | 73°F | 9.1" |
| September | 59°F | 79°F | 68°F | 6.9" |
| October | 48°F | 69°F | 57°F | 7.1" |
| November | 38°F | 59°F | 47°F | 6.1" |
| December | 34°F | 51°F | 41°F | 6.9" |
| Index | Grundy | Virginia | National |
| Air quality index | 45 | 58 | 42 |
| Pollution index | 780,751 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 236 |
| Days with moderate air quality | 108 |
| Days w/ poor A.Q. for sensitive groups | 21 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Raven, VA | 2,305 | 45 | 10.0% |
| Elkhorn City, KY | 1,085 | 45 | 10.0% |
| Vansant, VA | 182 | 45 | 10.0% |
| Clinchco, VA | 236 | 45 | 10.0% |
| Haysi, VA | 633 | 45 | 10.0% |
| Grundy, VA | 1,034 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Snead, AL | 1,034 | 43 | 14.0% |
| Center Hill, FL | 1,034 | 30 | 40.0% |
| Willards, MD | 1,034 | 36 | 28.0% |
| Kittery Point, ME | 1,034 | 37 | 26.0% |
| Maypearl, TX | 1,034 | 41 | 18.0% |
| Grundy, VA | 1,034 | 45 | 10.0% |
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