| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 5°F | 32°F | 17°F | 0.2" |
| February | 10°F | 34°F | 21°F | 0.6" |
| March | 23°F | 51°F | 35°F | 1.7" |
| April | 29°F | 58°F | 43°F | 1.8" |
| May | 40°F | 67°F | 53°F | 5.9" |
| June | 52°F | 78°F | 64°F | 5.0" |
| July | 57°F | 91°F | 74°F | 3.8" |
| August | 52°F | 85°F | 68°F | 3.4" |
| September | 43°F | 77°F | 59°F | 1.9" |
| October | 32°F | 61°F | 45°F | 0.6" |
| November | 20°F | 46°F | 32°F | 0.9" |
| December | 8°F | 31°F | 19°F | 0.8" |
| Index | Lemmon | South Dakota | National |
| Air quality index | 33 | 36 | 42 |
| Pollution index | 574,188 | 345,623 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 354 |
| Days with moderate air quality | 11 |
| 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 | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Haynes, ND | 37 | 33 | 34.0% |
| Lemmon, SD | 1,288 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Walnut Grove, CA | 1,288 | 52 | 4.0% |
| Maple Bluff, WI | 1,288 | 39 | 22.0% |
| Bear Creek, AK | 1,287 | 31 | 38.0% |
| Lake Catherine, IL | 1,289 | 39 | 22.0% |
| Toluca, IL | 1,287 | 0 | 100.0% |
| Lemmon, SD | 1,288 | 33 | 34.0% |
Here are the best places to live in South Dakota
These are the 10 most affordable cities in South Dakota
Top 10 cities in South Dakota with the best education system
See the best places to live in & around Lemmon