| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 66°F | 81°F | 73°F | 4.0" |
| February | 65°F | 81°F | 72°F | 0.8" |
| March | 65°F | 82°F | 73°F | 1.6" |
| April | 67°F | 84°F | 75°F | 0.5" |
| May | 69°F | 86°F | 77°F | 0.7" |
| June | 71°F | 87°F | 78°F | 0.7" |
| July | 72°F | 89°F | 80°F | 0.2" |
| August | 72°F | 89°F | 80°F | 0.4" |
| September | 73°F | 89°F | 80°F | 0.2" |
| October | 71°F | 87°F | 78°F | 1.8" |
| November | 70°F | 84°F | 76°F | 4.8" |
| December | 67°F | 82°F | 74°F | 3.8" |
| Index | Waipahu | Hawaii | National |
| Air quality index | 30 | 59 | 42 |
| Pollution index | 11,544,100 | 3,576,767 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 347 |
| Days with moderate air quality | 18 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.120% |
| Carbon Tetrachloride | 0.060% |
| Lead | 0.360% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| East Honolulu, HI | 47,132 | 30 | 40.0% |
| Kaaawa, HI | 1,235 | 30 | 40.0% |
| Pearl City, HI | 45,159 | 30 | 40.0% |
| Waimalu, HI | 13,714 | 30 | 40.0% |
| Makaha, HI | 10,087 | 30 | 40.0% |
| Waipahu, HI | 38,276 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Olive Branch, MS | 38,270 | 45 | 10.0% |
| Tupelo, MS | 38,251 | 39 | 22.0% |
| Stanton, CA | 38,317 | 72 | 44.0% |
| Brighton, CO | 38,355 | 58 | 16.0% |
| Pahrump, NV | 38,390 | 15 | 70.0% |
| Waipahu, HI | 38,276 | 30 | 40.0% |
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