| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 13°F | 39°F | 25°F | 0.6" |
| February | 16°F | 43°F | 29°F | 0.8" |
| March | 28°F | 58°F | 42°F | 1.3" |
| April | 39°F | 68°F | 53°F | 3.3" |
| May | 49°F | 78°F | 63°F | 5.7" |
| June | 61°F | 88°F | 74°F | 5.4" |
| July | 65°F | 92°F | 78°F | 3.1" |
| August | 62°F | 89°F | 75°F | 4.4" |
| September | 53°F | 83°F | 67°F | 4.6" |
| October | 40°F | 70°F | 54°F | 3.2" |
| November | 28°F | 57°F | 41°F | 1.0" |
| December | 16°F | 41°F | 27°F | 1.5" |
| Index | Roca | Nebraska | National |
| Air quality index | ',number_format( $r2->med_aqi ),' | ',number_format( $r1->med_aqi ),' | ',number_format( $r0->med_aqi ),' |
| Pollution index | ',number_format( $r2->sum188 ),' | ',number_format( $r1->sum188 ),' | ',number_format( $r0->sum188 ),' |
| Measurement | Total |
| Days measured | 259 |
| Days with good air quality | 234 |
| Days with moderate air quality | 25 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Clatonia, NE | 395 | 34 | 32% |
| Eagle, NE | 1,019 | 34 | 32% |
| Lincoln, NE | 273,018 | 34 | 32% |
| Sprague, NE | 131 | 34 | 32% |
| Yankee Hill, NE | 378 | 34 | 32% |
| Roca, NE | 195 | 34 | 32% |
| City, State | Population | Air Quality Index | National Avg. |
| Friendship, OH | 195 | 19 | 62% |
| Alpine, CO | 195 | 43 | 14% |
| Braman, OK | 195 | 44 | 12% |
| Searles, MN | 195 | 35 | 30% |
| Leesville, OH | 195 | 39 | 22% |
| Roca, NE | 195 | 34 | 32% |
Here are the best places to live in Nebraska
Top 10 cities in Nebraska with the best education system
Check out the 10 safest cities in Nebraska
10 best cities to buy a new house in Nebraska