| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 37°F | 29°F | 5.7" |
| February | 17°F | 37°F | 26°F | 4.2" |
| March | 24°F | 46°F | 35°F | 6.8" |
| April | 37°F | 62°F | 49°F | 11.5" |
| May | 46°F | 72°F | 58°F | 2.6" |
| June | 59°F | 82°F | 69°F | 6.6" |
| July | 62°F | 83°F | 72°F | 9.8" |
| August | 61°F | 83°F | 71°F | 7.9" |
| September | 53°F | 79°F | 65°F | 4.0" |
| October | 47°F | 67°F | 55°F | 23.4" |
| November | 32°F | 52°F | 42°F | 5.7" |
| December | 24°F | 39°F | 31°F | 6.8" |
| Index | Crandon Lakes | New Jersey | National |
| Air quality index | 34 | 45 | 42 |
| Pollution index | 2,789,290 | 7,246,891 | 2,726,193 |
| Measurement | Total |
| Days measured | 349 |
| Days with good air quality | 340 |
| Days with moderate air quality | 9 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Allamuchy, NJ | 114 | 34 | 32.0% |
| Mount Arlington, NJ | 5,751 | 34 | 32.0% |
| Blairstown, NJ | 268 | 34 | 32.0% |
| Johnsonburg, NJ | 363 | 34 | 32.0% |
| Franklin, NJ | 4,737 | 34 | 32.0% |
| Crandon Lakes, NJ | 1,221 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Mapleton, ND | 1,221 | 33 | 34.0% |
| Wildwood, TN | 1,221 | 46 | 8.0% |
| Mazon, IL | 1,222 | 0 | 100.0% |
| Wamac, IL | 1,222 | 43 | 14.0% |
| Verona, KY | 1,222 | 54 | 8.0% |
| Crandon Lakes, NJ | 1,221 | 34 | 32.0% |
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