| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 62°F | 82°F | 72°F | 2.1" |
| February | 63°F | 82°F | 72°F | 1.5" |
| March | 64°F | 82°F | 73°F | 3.3" |
| April | 66°F | 84°F | 74°F | 1.2" |
| May | 67°F | 86°F | 76°F | 1.0" |
| June | 69°F | 87°F | 78°F | 0.3" |
| July | 71°F | 88°F | 79°F | 0.6" |
| August | 71°F | 89°F | 79°F | 0.6" |
| September | 70°F | 89°F | 79°F | 0.3" |
| October | 69°F | 88°F | 78°F | 0.9" |
| November | 67°F | 85°F | 75°F | 1.7" |
| December | 64°F | 83°F | 73°F | 3.6" |
| Index | Waikapu | Hawaii | National |
| Air quality index | 15 | 59 | 42 |
| Pollution index | 1,421,020 | 3,576,767 | 2,726,193 |
| Measurement | Total |
| Days measured | 362 |
| Days with good air quality | 347 |
| Days with moderate air quality | 11 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Napili-Honokowai, HI | 6,870 | 15 | 70.0% |
| Waihee-Waiehu, HI | 10,771 | 15 | 70.0% |
| Keokea, HI | 2,471 | 15 | 70.0% |
| Olinda, HI | 948 | 15 | 70.0% |
| Kaanapali, HI | 1,115 | 15 | 70.0% |
| Waikapu, HI | 3,754 | 15 | 70.0% |
| City | Population | Air Quality Index | National Avg. |
| Honea Path, SC | 3,753 | 31 | 38.0% |
| North Baltimore, OH | 3,752 | 40 | 20.0% |
| Lamont County, AB | 3,752 | n/a | |
| Quartzsite, AZ | 3,756 | 13 | 74.0% |
| De Salaberry, MB | 3,756 | n/a | |
| Waikapu, HI | 3,754 | 15 | 70.0% |
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