| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 36°F | 25°F | 0.8" |
| February | 17°F | 40°F | 27°F | 1.1" |
| March | 29°F | 54°F | 39°F | 2.1" |
| April | 38°F | 64°F | 49°F | 5.3" |
| May | 48°F | 73°F | 60°F | 5.1" |
| June | 59°F | 83°F | 71°F | 7.4" |
| July | 64°F | 87°F | 75°F | 5.6" |
| August | 61°F | 84°F | 71°F | 5.9" |
| September | 52°F | 78°F | 63°F | 4.4" |
| October | 40°F | 65°F | 51°F | 5.1" |
| November | 27°F | 53°F | 38°F | 2.2" |
| December | 17°F | 37°F | 26°F | 1.5" |
| Index | Petersburg | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 333,064 | 590,627 | 2,726,193 |
| Measurement | Total |
| Days measured | 97 |
| Days with good air quality | 92 |
| Days with moderate air quality | 5 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.004% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Spalding, NE | 419 | 19 | 62.0% |
| Elgin, NE | 783 | 19 | 62.0% |
| Albion, NE | 1,511 | 19 | 62.0% |
| Loretto, NE | 112 | 19 | 62.0% |
| Oakdale, NE | 350 | 19 | 62.0% |
| Petersburg, NE | 451 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Clipper Mills, CA | 451 | 44 | 12.0% |
| Naturita, CO | 451 | 44 | 12.0% |
| Lost Nation, IA | 451 | 46 | 8.0% |
| Wesley, IA | 451 | 15 | 70.0% |
| Forest Hills, KY | 451 | 49 | 2.0% |
| Petersburg, NE | 451 | 19 | 62.0% |
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