| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 55°F | 43°F | 4.9" |
| February | 34°F | 57°F | 44°F | 6.7" |
| March | 41°F | 66°F | 53°F | 5.2" |
| April | 50°F | 75°F | 62°F | 5.6" |
| May | 58°F | 81°F | 69°F | 10.3" |
| June | 66°F | 88°F | 76°F | 10.7" |
| July | 69°F | 90°F | 78°F | 10.6" |
| August | 69°F | 88°F | 77°F | 9.4" |
| September | 63°F | 82°F | 72°F | 6.0" |
| October | 52°F | 75°F | 62°F | 9.1" |
| November | 41°F | 65°F | 51°F | 7.5" |
| December | 38°F | 59°F | 47°F | 8.1" |
| Index | Calypso | North Carolina | National |
| Air quality index | 40 | 35 | 42 |
| Pollution index | 949,752 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 359 |
| Days with good air quality | 237 |
| Days with moderate air quality | 122 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Newton Grove, NC | 616 | 40 | 20.0% |
| Kenansville, NC | 949 | 40 | 20.0% |
| Brogden, NC | 2,306 | 40 | 20.0% |
| Clinton, NC | 8,480 | 40 | 20.0% |
| Turkey, NC | 427 | 40 | 20.0% |
| Calypso, NC | 647 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Noble, IL | 647 | 40 | 20.0% |
| Palmyra, IL | 647 | 40 | 20.0% |
| Burlington, IN | 647 | 42 | 16.0% |
| Leonardville, KS | 647 | 32 | 36.0% |
| McIntosh, MN | 647 | 33 | 34.0% |
| Calypso, NC | 647 | 40 | 20.0% |
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