Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 36°F | 46°F | 41°F | 2.2" |
February | 36°F | 49°F | 42°F | 1.4" |
March | 38°F | 53°F | 45°F | 1.3" |
April | 40°F | 57°F | 48°F | 0.9" |
May | 43°F | 64°F | 52°F | 0.9" |
June | 47°F | 68°F | 57°F | 0.4" |
July | 49°F | 74°F | 60°F | 0.2" |
August | 49°F | 74°F | 60°F | 0.4" |
September | 48°F | 69°F | 57°F | 1.0" |
October | 44°F | 59°F | 51°F | 1.7" |
November | 39°F | 51°F | 45°F | 2.4" |
December | 35°F | 45°F | 40°F | 2.0" |
Index | Friday Harbor | Washington | National |
Air quality index | 34 | 36 | 42 |
Pollution index | 480,925 | 4,541,850 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 277 |
Days with moderate air quality | 78 |
Days w/ poor A.Q. for sensitive groups | 10 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.001% |
Lead | 0.040% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Friday Harbor, WA | 2,406 | 34 | 32.0% |
City | Population | Air Quality Index | National Avg. |
Fulton, KY | 2,405 | 44 | 12.0% |
Saint-Léonard-d'Aston, QC | 2,405 | n/a | |
Nice, CA | 2,407 | 31 | 38.0% |
Marengo, IA | 2,407 | 39 | 22.0% |
Rineyville, KY | 2,407 | 39 | 22.0% |
Friday Harbor, WA | 2,406 | 34 | 32.0% |