| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 46°F | 35°F | 5.7" |
| February | 26°F | 48°F | 36°F | 4.2" |
| March | 34°F | 59°F | 46°F | 4.5" |
| April | 43°F | 70°F | 56°F | 6.3" |
| May | 52°F | 77°F | 64°F | 6.4" |
| June | 61°F | 85°F | 72°F | 6.1" |
| July | 64°F | 87°F | 75°F | 5.9" |
| August | 63°F | 86°F | 73°F | 5.4" |
| September | 56°F | 79°F | 67°F | 6.9" |
| October | 45°F | 69°F | 56°F | 5.9" |
| November | 34°F | 58°F | 45°F | 3.6" |
| December | 29°F | 50°F | 39°F | 5.0" |
| Index | Timberville | Virginia | National |
| Air quality index | 36 | 58 | 42 |
| Pollution index | 2,356,780 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 349 |
| Days with moderate air quality | 16 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.110% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.270% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Mount Jackson, VA | 2,283 | 36 | 28.0% |
| Dayton, VA | 1,540 | 36 | 28.0% |
| Broadway, VA | 3,925 | 36 | 28.0% |
| Harrisonburg, VA | 53,558 | 36 | 28.0% |
| Belmont Estates, VA | 1,204 | 36 | 28.0% |
| Timberville, VA | 2,666 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| North Okanagan D, BC | 2,666 | n/a | |
| Dawson Springs, KY | 2,665 | 40 | 20.0% |
| Cambridge Springs, PA | 2,667 | 36 | 28.0% |
| Folly Beach, SC | 2,664 | 38 | 24.0% |
| Spaniard's Bay, NL | 2,664 | n/a | |
| Timberville, VA | 2,666 | 36 | 28.0% |
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