Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 16°F | 32°F | 24°F | 1.4" |
February | 17°F | 33°F | 25°F | 1.5" |
March | 28°F | 45°F | 36°F | 2.6" |
April | 37°F | 57°F | 46°F | 4.1" |
May | 47°F | 68°F | 57°F | 3.7" |
June | 57°F | 77°F | 67°F | 4.5" |
July | 63°F | 82°F | 72°F | 4.4" |
August | 62°F | 80°F | 71°F | 3.7" |
September | 55°F | 73°F | 64°F | 3.3" |
October | 44°F | 62°F | 52°F | 3.4" |
November | 33°F | 49°F | 40°F | 2.0" |
December | 22°F | 36°F | 29°F | 2.5" |
Index | Winthrop Harbor | Illinois | National |
Air quality index | 39 | 41 | 50 |
Pollution index | 3,131,700 | 3,347,295 | 5,066,862 |
Measurement | Total |
Days measured | 203 |
Days with good air quality | 174 |
Days with moderate air quality | 28 |
Days w/ poor A.Q. for sensitive groups | 1 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.010% |
Benzene | 0.030% |
Carbon Tetrachloride | 0.010% |
Lead | 0.004% |
Mercury | 0.360% |
City, State | Population | Air Quality Index | National Avg. |
Antioch, IL | 14,342 | 39 | 22% |
Libertyville, IL | 20,435 | 39 | 22% |
Venetian Village, IL | 2,623 | 39 | 22% |
Round Lake Heights, IL | 3,110 | 39 | 22% |
Wadsworth, IL | 3,646 | 39 | 22% |
Winthrop Harbor, IL | 6,832 | 39 | 22% |
City, State | Population | Air Quality Index | National Avg. |
Greenville, IL | 6,833 | 43 | 14% |
Milford, OH | 6,833 | 54 | 8% |
Whitinsville, MA | 6,831 | 40 | 20% |
Barrington, NJ | 6,831 | 51 | 2% |
Mountainside, NJ | 6,835 | 51 | 2% |
Winthrop Harbor, IL | 6,832 | 39 | 22% |