| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 41°F | 32°F | 6.0" |
| February | 21°F | 38°F | 29°F | 3.7" |
| March | 29°F | 50°F | 39°F | 7.0" |
| April | 40°F | 63°F | 51°F | 9.9" |
| May | 48°F | 74°F | 61°F | 3.6" |
| June | 61°F | 83°F | 72°F | 6.9" |
| July | 65°F | 85°F | 74°F | 12.6" |
| August | 65°F | 86°F | 75°F | 5.8" |
| September | 58°F | 82°F | 69°F | 1.1" |
| October | 50°F | 69°F | 58°F | 13.4" |
| November | 35°F | 55°F | 45°F | 4.9" |
| December | 26°F | 40°F | 33°F | 6.6" |
| Index | Frenchtown | New Jersey | National |
| Air quality index | 42 | 45 | 42 |
| Pollution index | 3,167,110 | 7,246,891 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 275 |
| Days with moderate air quality | 86 |
| Days w/ poor A.Q. for sensitive groups | 4 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.030% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Annandale, NJ | 1,794 | 34 | 32.0% |
| High Bridge, NJ | 3,460 | 34 | 32.0% |
| Broadway, NJ | 183 | 34 | 32.0% |
| Califon, NJ | 1,184 | 34 | 32.0% |
| New Village, NJ | 539 | 34 | 32.0% |
| Frenchtown, NJ | 1,366 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Milton CDP (Ulster County), NY | 1,366 | 37 | 26.0% |
| Rockaway Beach, OR | 1,366 | 18 | 64.0% |
| Miller, SD | 1,366 | 20 | 60.0% |
| Nokesville, VA | 1,366 | 47 | 6.0% |
| Tring-Jonction, QC | 1,366 | n/a | |
| Frenchtown, NJ | 1,366 | 42 | 16.0% |
Here are the best places to live in New Jersey
Top 10 best public schools in Frenchtown
Check out the 10 safest cities in New Jersey
10 Best cities in New Jersey for employment