| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 44°F | 31°F | 0.6" |
| February | 24°F | 49°F | 35°F | 1.1" |
| March | 35°F | 62°F | 47°F | 1.8" |
| April | 45°F | 70°F | 56°F | 3.1" |
| May | 54°F | 79°F | 66°F | 5.6" |
| June | 66°F | 92°F | 78°F | 4.0" |
| July | 70°F | 96°F | 82°F | 3.1" |
| August | 68°F | 92°F | 79°F | 4.3" |
| September | 59°F | 84°F | 71°F | 3.1" |
| October | 47°F | 72°F | 58°F | 2.5" |
| November | 34°F | 59°F | 45°F | 1.1" |
| December | 22°F | 45°F | 32°F | 1.5" |
| Index | Brookville | Kansas | National |
| Air quality index | 32 | 47 | 42 |
| Pollution index | 214,073 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 95 |
| Days with good air quality | 94 |
| Days with moderate air quality | 1 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.004% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Falun, KS | 57 | 32 | 36.0% |
| Culver, KS | 95 | 32 | 36.0% |
| Salina, KS | 46,706 | 32 | 36.0% |
| Smolan, KS | 190 | 32 | 36.0% |
| Assaria, KS | 443 | 32 | 36.0% |
| Brookville, KS | 242 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Port Costa, CA | 242 | 40 | 20.0% |
| Orchard Hill, GA | 242 | 38 | 24.0% |
| Talmo, GA | 242 | 37 | 26.0% |
| Patterson, IA | 242 | 39 | 22.0% |
| Wardner, ID | 242 | 43 | 14.0% |
| Brookville, KS | 242 | 32 | 36.0% |
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