| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 36°F | 23°F | 0.8" |
| February | 15°F | 40°F | 26°F | 0.7" |
| March | 26°F | 55°F | 39°F | 1.2" |
| April | 37°F | 65°F | 50°F | 3.2" |
| May | 48°F | 76°F | 61°F | 4.1" |
| June | 58°F | 85°F | 72°F | 5.1" |
| July | 62°F | 89°F | 76°F | 2.0" |
| August | 60°F | 86°F | 73°F | 4.6" |
| September | 51°F | 80°F | 65°F | 2.5" |
| October | 39°F | 67°F | 52°F | 2.7" |
| November | 26°F | 54°F | 39°F | 0.7" |
| December | 14°F | 37°F | 25°F | 1.3" |
| Index | Foster | Nebraska | National |
| Air quality index | 35 | 86 | 42 |
| Pollution index | 493,775 | 590,627 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 322 |
| Days with moderate air quality | 42 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Pierce, NE | 1,973 | 35 | 30.0% |
| McLean, NE | 82 | 35 | 30.0% |
| Creighton, NE | 1,253 | 35 | 30.0% |
| Magnet, NE | 53 | 35 | 30.0% |
| Plainview, NE | 1,440 | 35 | 30.0% |
| Foster, NE | 46 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Tolsona, AK | 46 | 31 | 38.0% |
| Cardiff, AL | 46 | 53 | 6.0% |
| Soda Springs, CA | 46 | 44 | 12.0% |
| Morley, IA | 46 | 39 | 22.0% |
| Redding, IA | 46 | 43 | 14.0% |
| Foster, NE | 46 | 35 | 30.0% |
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