| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 63°F | 81°F | 71°F | 6.7" |
| February | 64°F | 80°F | 71°F | 11.2" |
| March | 65°F | 80°F | 71°F | 12.1" |
| April | 65°F | 81°F | 72°F | 8.3" |
| May | 66°F | 83°F | 74°F | 7.0" |
| June | 68°F | 83°F | 75°F | 6.0" |
| July | 69°F | 84°F | 76°F | 7.6" |
| August | 69°F | 85°F | 76°F | 8.9" |
| September | 69°F | 85°F | 76°F | 8.5" |
| October | 68°F | 84°F | 75°F | 10.4" |
| November | 67°F | 82°F | 73°F | 12.0" |
| December | 65°F | 80°F | 72°F | 15.3" |
| Index | Keaau | Hawaii | National |
| Air quality index | 16 | 59 | 42 |
| Pollution index | 1,421,020 | 3,576,767 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 357 |
| Days with moderate air quality | 8 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| 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. |
| Ainaloa, HI | 3,636 | 16 | 68.0% |
| Hawaiian Acres, HI | 2,890 | 16 | 68.0% |
| Kurtistown, HI | 3,230 | 16 | 68.0% |
| Orchidlands Estates, HI | 3,116 | 16 | 68.0% |
| Pepeekeo, HI | 1,531 | 16 | 68.0% |
| Keaau, HI | 1,280 | 16 | 68.0% |
| City | Population | Air Quality Index | National Avg. |
| Alamance, NC | 1,280 | 31 | 38.0% |
| Yellville, AR | 1,281 | 36 | 28.0% |
| Litchfield, CT | 1,279 | 37 | 26.0% |
| Germantown, IL | 1,279 | 43 | 14.0% |
| Hurley, MS | 1,279 | 32 | 36.0% |
| Keaau, HI | 1,280 | 16 | 68.0% |
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