| 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 | Wailua | 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. |
| Anahola, HI | 2,425 | 13 | 74.0% |
| Kalaheo, HI | 5,333 | 13 | 74.0% |
| Koloa, HI | 2,448 | 13 | 74.0% |
| Poipu, HI | 1,005 | 13 | 74.0% |
| Wainiha, HI | 197 | 13 | 74.0% |
| Wailua, HI | 2,481 | 13 | 74.0% |
| City | Population | Air Quality Index | National Avg. |
| West Dennis, MA | 2,479 | 36 | 28.0% |
| Riverview, SC | 2,479 | 49 | 2.0% |
| Pantego, TX | 2,479 | 51 | 2.0% |
| Killaloe, Hagarty and Richards, ON | 2,479 | n/a | |
| Charleston, AR | 2,483 | 36 | 28.0% |
| Wailua, HI | 2,481 | 13 | 74.0% |
Here are the best places to live in Hawaii
Check out the 10 most dangerous cities in Hawaii
These are the largest cities in Hawaii
See the best places to live in Wailua