| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 39°F | 24°F | 0.3" |
| February | 13°F | 42°F | 26°F | 0.4" |
| March | 23°F | 57°F | 38°F | 0.6" |
| April | 30°F | 62°F | 45°F | 2.2" |
| May | 39°F | 71°F | 54°F | 3.0" |
| June | 50°F | 84°F | 67°F | 2.8" |
| July | 57°F | 91°F | 73°F | 1.7" |
| August | 55°F | 89°F | 71°F | 1.7" |
| September | 44°F | 80°F | 61°F | 1.6" |
| October | 31°F | 65°F | 46°F | 1.1" |
| November | 20°F | 53°F | 35°F | 0.3" |
| December | 8°F | 38°F | 22°F | 0.4" |
| Index | Berea | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 234,664 | 590,627 | 2,726,193 |
| Measurement | Total |
| Days measured | 113 |
| Days with good air quality | 110 |
| Days with moderate air quality | 3 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.004% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Alliance, NE | 8,330 | 19 | 62.0% |
| Hemingford, NE | 740 | 19 | 62.0% |
| Berea, NE | 37 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Excursion Inlet, AK | 37 | 20 | 60.0% |
| Summerhaven, AZ | 37 | 47 | 6.0% |
| Proberta, CA | 37 | 41 | 18.0% |
| Alfordsville, IN | 37 | 6 | 88.0% |
| Sun City, KS | 37 | 15 | 70.0% |
| Berea, NE | 37 | 19 | 62.0% |