| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 8°F | 24°F | 16°F | 1.7" |
| February | 10°F | 28°F | 18°F | 2.5" |
| March | 25°F | 42°F | 32°F | 2.7" |
| April | 35°F | 57°F | 45°F | 2.9" |
| May | 46°F | 70°F | 57°F | 6.8" |
| June | 57°F | 79°F | 68°F | 6.4" |
| July | 61°F | 83°F | 72°F | 6.0" |
| August | 59°F | 80°F | 68°F | 5.7" |
| September | 51°F | 74°F | 61°F | 7.5" |
| October | 38°F | 60°F | 48°F | 4.9" |
| November | 26°F | 45°F | 34°F | 2.6" |
| December | 12°F | 27°F | 19°F | 0.9" |
| Index | Avoca | Minnesota | National |
| Air quality index | 32 | 35 | 42 |
| Pollution index | 627,200 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 362 |
| Days with good air quality | 327 |
| Days with moderate air quality | 35 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Westbrook, MN | 900 | 32 | 36.0% |
| Iona, MN | 171 | 32 | 36.0% |
| Currie, MN | 184 | 32 | 36.0% |
| Dovray, MN | 41 | 32 | 36.0% |
| Slayton, MN | 1,953 | 32 | 36.0% |
| Avoca, MN | 115 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Nikolai, AK | 115 | 31 | 38.0% |
| Onycha, AL | 115 | 35 | 30.0% |
| Staves, AR | 115 | 32 | 36.0% |
| Wet Camp Village, AZ | 115 | 74 | 48.0% |
| Mettler, CA | 115 | 67 | 34.0% |
| Avoca, MN | 115 | 32 | 36.0% |
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