| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 40°F | 27°F | 0.3" |
| February | 19°F | 43°F | 29°F | 0.4" |
| March | 29°F | 58°F | 41°F | 0.8" |
| April | 38°F | 65°F | 50°F | 3.6" |
| May | 48°F | 74°F | 60°F | 3.5" |
| June | 59°F | 84°F | 71°F | 3.8" |
| July | 64°F | 89°F | 76°F | 2.7" |
| August | 61°F | 86°F | 73°F | 3.5" |
| September | 52°F | 80°F | 64°F | 1.7" |
| October | 39°F | 67°F | 51°F | 1.8" |
| November | 27°F | 54°F | 39°F | 0.8" |
| December | 16°F | 39°F | 26°F | 0.4" |
| Index | Smithfield | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 5,232,950 | 590,627 | 2,726,193 |
| Measurement | Total |
| Days measured | 60 |
| Days with good air quality | 55 |
| Days with moderate air quality | 5 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Elwood, NE | 674 | 19 | 62.0% |
| Loomis, NE | 411 | 19 | 62.0% |
| Lexington, NE | 10,069 | 19 | 62.0% |
| Overton, NE | 702 | 19 | 62.0% |
| Atlanta, NE | 90 | 19 | 62.0% |
| Smithfield, NE | 91 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Lowell Point, AK | 91 | 31 | 38.0% |
| Guion, AR | 91 | 36 | 28.0% |
| Hat Creek, CA | 91 | 42 | 16.0% |
| Lake Davis, CA | 91 | 44 | 12.0% |
| Peoria, CO | 91 | 58 | 16.0% |
| Smithfield, NE | 91 | 19 | 62.0% |
Here are the best places to live in Nebraska
These are the 10 most affordable cities in Nebraska
Check out the 10 safest cities in Nebraska
Top 10 cities in Nebraska with the best education system