| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 65°F | 79°F | 72°F | 2.8" |
| February | 65°F | 78°F | 72°F | 4.0" |
| March | 66°F | 79°F | 72°F | 6.9" |
| April | 69°F | 80°F | 74°F | 1.6" |
| May | 70°F | 82°F | 76°F | 2.0" |
| June | 73°F | 83°F | 77°F | 1.2" |
| July | 73°F | 85°F | 79°F | 1.4" |
| August | 74°F | 85°F | 79°F | 2.6" |
| September | 74°F | 86°F | 79°F | 1.5" |
| October | 73°F | 84°F | 78°F | 2.5" |
| November | 70°F | 81°F | 76°F | 3.5" |
| December | 67°F | 80°F | 73°F | 4.5" |
| Index | Kapaa | Hawaii | National |
| Air quality index | 13 | 59 | 42 |
| Pollution index | 2,893,180 | 3,576,767 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 363 |
| Days with moderate air quality | 2 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.090% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Hanalei, HI | 408 | 13 | 74.0% |
| Kilauea, HI | 2,879 | 13 | 74.0% |
| Omao, HI | 1,495 | 13 | 74.0% |
| Wailua, HI | 2,481 | 13 | 74.0% |
| Anahola, HI | 2,425 | 13 | 74.0% |
| Kapaa, HI | 9,961 | 13 | 74.0% |
| City | Population | Air Quality Index | National Avg. |
| Pleasant Hill, IA | 9,959 | 39 | 22.0% |
| Charter Oak, CA | 9,963 | 89 | 78.0% |
| River Grove, IL | 9,957 | 55 | 10.0% |
| Boiling Springs, SC | 9,953 | 44 | 12.0% |
| Lambertville, MI | 9,970 | 40 | 20.0% |
| Kapaa, HI | 9,961 | 13 | 74.0% |
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