| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 56°F | 47°F | 14.3" |
| February | 41°F | 56°F | 47°F | 10.3" |
| March | 42°F | 56°F | 48°F | 14.1" |
| April | 43°F | 59°F | 50°F | 9.9" |
| May | 47°F | 64°F | 54°F | 6.0" |
| June | 50°F | 68°F | 58°F | 8.1" |
| July | 52°F | 69°F | 59°F | 2.7" |
| August | 52°F | 69°F | 59°F | 1.5" |
| September | 52°F | 71°F | 59°F | 6.0" |
| October | 49°F | 66°F | 56°F | 11.9" |
| November | 44°F | 58°F | 50°F | 14.5" |
| December | 40°F | 54°F | 46°F | 14.1" |
| Index | Brookings | Oregon | National |
| Air quality index | 20 | 32 | 42 |
| Pollution index | 13,842,600 | 7,156,356 | 2,726,193 |
| Measurement | Total |
| Days measured | 248 |
| Days with good air quality | 236 |
| Days with moderate air quality | 12 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.210% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.030% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Smith River, CA | 685 | 20 | 60.0% |
| Harbor, OR | 2,115 | 20 | 60.0% |
| Fort Dick, CA | 1,446 | 20 | 60.0% |
| Brookings, OR | 6,616 | 20 | 60.0% |
| City | Population | Air Quality Index | National Avg. |
| Bowleys Quarters, MD | 6,614 | 46 | 8.0% |
| Larose, LA | 6,618 | 41 | 18.0% |
| Kentville, NS | 6,619 | n/a | |
| West Yarmouth, MA | 6,612 | 36 | 28.0% |
| De Soto, MO | 6,612 | 54 | 8.0% |
| Brookings, OR | 6,616 | 20 | 60.0% |