| 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 | Fern Acres | Hawaii | National |
| Air quality index | 16 | 59 | 50 |
| Pollution index | 1,421,020 | 4,235,086 | 5,066,862 |
| 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, State | Population | Air Quality Index | National Avg. |
| Ainaloa, HI | 3,102 | 16 | 68% |
| Hawaiian Beaches, HI | 5,035 | 16 | 68% |
| Kurtistown, HI | 1,168 | 16 | 68% |
| Orchidlands Estates, HI | 3,221 | 16 | 68% |
| Eden Roc, HI | 599 | 16 | 68% |
| Fern Acres, HI | 1,392 | 16 | 68% |
| City, State | Population | Air Quality Index | National Avg. |
| Chapmanville, WV | 1,392 | 40 | 20% |
| Muscoda, WI | 1,392 | 29 | 42% |
| Mayo, SC | 1,393 | 44 | 12% |
| Dilkon, AZ | 1,393 | 45 | 10% |
| Buhler, KS | 1,391 | 40 | 20% |
| Fern Acres, HI | 1,392 | 16 | 68% |
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