| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 41°F | 31°F | 2.8" |
| February | 22°F | 43°F | 31°F | 2.3" |
| March | 30°F | 53°F | 41°F | 3.7" |
| April | 39°F | 66°F | 52°F | 4.0" |
| May | 49°F | 75°F | 62°F | 3.7" |
| June | 58°F | 83°F | 70°F | 5.3" |
| July | 63°F | 87°F | 75°F | 5.3" |
| August | 61°F | 85°F | 72°F | 5.5" |
| September | 55°F | 79°F | 66°F | 3.6" |
| October | 43°F | 68°F | 55°F | 4.5" |
| November | 33°F | 56°F | 44°F | 3.0" |
| December | 27°F | 46°F | 36°F | 4.6" |
| Index | Flemington | New Jersey | National |
| Air quality index | 41 | 45 | 42 |
| Pollution index | 3,167,110 | 7,246,891 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 280 |
| Days with moderate air quality | 83 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| 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. |
| Asbury, NJ | 207 | 34 | 32.0% |
| Clinton, NJ | 2,699 | 34 | 32.0% |
| Califon, NJ | 1,184 | 34 | 32.0% |
| New Village, NJ | 539 | 34 | 32.0% |
| High Bridge, NJ | 3,460 | 34 | 32.0% |
| Flemington, NJ | 4,601 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| King George, VA | 4,601 | 47 | 6.0% |
| Columbiana, AL | 4,602 | 53 | 6.0% |
| Redland, AL | 4,602 | 52 | 4.0% |
| Tuscola, IL | 4,599 | 42 | 16.0% |
| Medina, TX | 4,599 | 41 | 18.0% |
| Flemington, NJ | 4,601 | 41 | 18.0% |
Here are the best places to live in New Jersey
Top 10 cities in New Jersey with the best education system
These are the 10 most affordable cities in New Jersey
Check out the 10 safest cities in New Jersey