| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 40°F | 27°F | 0.6" |
| February | 20°F | 43°F | 31°F | 1.1" |
| March | 34°F | 58°F | 44°F | 2.3" |
| April | 44°F | 68°F | 55°F | 4.1" |
| May | 54°F | 77°F | 65°F | 5.1" |
| June | 65°F | 87°F | 75°F | 5.2" |
| July | 68°F | 89°F | 78°F | 3.6" |
| August | 65°F | 87°F | 75°F | 4.1" |
| September | 56°F | 81°F | 68°F | 3.7" |
| October | 44°F | 69°F | 55°F | 3.6" |
| November | 32°F | 56°F | 43°F | 1.7" |
| December | 21°F | 41°F | 30°F | 1.6" |
| Index | Graham | Missouri | National |
| Air quality index | 43 | 97 | 42 |
| Pollution index | 2,582,160 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 283 |
| Days with moderate air quality | 82 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Bigelow, MO | 3 | 43 | 14.0% |
| Mound City, MO | 1,150 | 43 | 14.0% |
| Barnard, MO | 254 | 43 | 14.0% |
| Fillmore, MO | 284 | 43 | 14.0% |
| Oregon, MO | 963 | 43 | 14.0% |
| Graham, MO | 166 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Movico, AL | 166 | 42 | 16.0% |
| Sierraville, CA | 166 | 44 | 12.0% |
| Wawona, CA | 166 | 50 | = 100 |
| Bethune, CO | 166 | 45 | 10.0% |
| Crook, CO | 166 | 19 | 62.0% |
| Graham, MO | 166 | 43 | 14.0% |
Here are the best places to live in Missouri
10 Best cities in Missouri for employment
10 best cities to buy a new house in Missouri
These are the 10 most affordable cities in Missouri