Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 36°F | 46°F | 41°F | 3.8" |
February | 37°F | 49°F | 42°F | 2.7" |
March | 39°F | 52°F | 45°F | 4.4" |
April | 42°F | 57°F | 48°F | 2.8" |
May | 47°F | 64°F | 54°F | 2.2" |
June | 51°F | 68°F | 58°F | 1.8" |
July | 55°F | 74°F | 63°F | 0.7" |
August | 56°F | 75°F | 63°F | 0.9" |
September | 53°F | 69°F | 59°F | 2.0" |
October | 47°F | 59°F | 52°F | 3.6" |
November | 40°F | 51°F | 45°F | 5.7" |
December | 35°F | 44°F | 39°F | 4.9" |
Index | Monroe | Washington | National |
Air quality index | 45 | 36 | 42 |
Pollution index | 43,367,400 | 4,541,850 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 236 |
Days with moderate air quality | 127 |
Days w/ poor A.Q. for sensitive groups | 2 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.020% |
Benzene | 0.790% |
Carbon Tetrachloride | 0.120% |
Lead | 0.210% |
Mercury | 0.180% |
City | Population | Air Quality Index | National Avg. |
Lake Cassidy, WA | 2,854 | 24 | 52.0% |
Marysville, WA | 69,629 | 24 | 52.0% |
Lochsloy, WA | 2,991 | 24 | 52.0% |
Lake Bosworth, WA | 1,071 | 24 | 52.0% |
Bothell West, WA | 19,899 | 45 | 10.0% |
Monroe, WA | 19,403 | 45 | 10.0% |
City | Population | Air Quality Index | National Avg. |
Fairwood, WA | 19,400 | 45 | 10.0% |
Five Forks, SC | 19,399 | 46 | 8.0% |
Montrose, CO | 19,396 | 44 | 12.0% |
Durango, CO | 19,413 | 44 | 12.0% |
Langley Park, MD | 19,391 | 47 | 6.0% |
Monroe, WA | 19,403 | 45 | 10.0% |