Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 18°F | 33°F | 26°F | 2.1" |
February | 18°F | 34°F | 26°F | 1.2" |
March | 28°F | 48°F | 38°F | 2.1" |
April | 38°F | 62°F | 49°F | 3.3" |
May | 49°F | 73°F | 61°F | 3.9" |
June | 58°F | 81°F | 70°F | 3.4" |
July | 62°F | 84°F | 73°F | 4.0" |
August | 60°F | 82°F | 71°F | 4.0" |
September | 53°F | 76°F | 64°F | 3.6" |
October | 43°F | 63°F | 52°F | 4.4" |
November | 32°F | 50°F | 41°F | 2.2" |
December | 24°F | 38°F | 31°F | 1.9" |
Index | Mattawan | Michigan | National |
Air quality index | 38 | 69 | 42 |
Pollution index | 1,797,130 | 4,161,606 | 2,726,193 |
Measurement | Total |
Days measured | 362 |
Days with good air quality | 312 |
Days with moderate air quality | 50 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.001% |
Benzene | 0.020% |
Carbon Tetrachloride | 0.002% |
Lead | 0.002% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Eastwood, MI | 5,675 | 38 | 24.0% |
Westwood, MI | 9,247 | 38 | 24.0% |
Portage, MI | 49,224 | 38 | 24.0% |
Marcellus, MI | 1,140 | 38 | 24.0% |
Lawrence, MI | 918 | 38 | 24.0% |
Mattawan, MI | 2,567 | 38 | 24.0% |
City | Population | Air Quality Index | National Avg. |
Crystal Lake, CT | 2,567 | 40 | 20.0% |
Shelby, MI | 2,567 | 38 | 24.0% |
Maynardville, TN | 2,567 | 46 | 8.0% |
Labelle, QC | 2,567 | n/a | |
Henniker, NH | 2,566 | 27 | 46.0% |
Mattawan, MI | 2,567 | 38 | 24.0% |