| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 53°F | 35°F | 0.5" |
| February | 24°F | 56°F | 38°F | 0.4" |
| March | 34°F | 68°F | 49°F | 1.0" |
| April | 42°F | 75°F | 56°F | 1.9" |
| May | 51°F | 82°F | 66°F | 1.9" |
| June | 63°F | 94°F | 78°F | 2.2" |
| July | 67°F | 96°F | 81°F | 2.4" |
| August | 65°F | 93°F | 78°F | 3.3" |
| September | 57°F | 87°F | 71°F | 1.5" |
| October | 44°F | 76°F | 58°F | 2.0" |
| November | 32°F | 64°F | 46°F | 0.3" |
| December | 23°F | 51°F | 35°F | 1.0" |
| Index | Gruver | Texas | National |
| Air quality index | 44 | 52 | 42 |
| Pollution index | 429,526 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 259 |
| Days with moderate air quality | 96 |
| Days w/ poor A.Q. for sensitive groups | 10 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.004% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Morse, TX | 215 | 44 | 12.0% |
| Spearman, TX | 3,123 | 44 | 12.0% |
| Gruver, TX | 1,482 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Waverly, IL | 1,482 | 40 | 20.0% |
| Chute-aux-Outardes, QC | 1,482 | n/a | |
| Hackleburg, AL | 1,483 | 37 | 26.0% |
| St. David, AZ | 1,481 | 45 | 10.0% |
| Lewiston, CA | 1,481 | 42 | 16.0% |
| Gruver, TX | 1,482 | 44 | 12.0% |
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