| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 59°F | 46°F | 1.4" |
| February | 41°F | 63°F | 50°F | 1.4" |
| March | 49°F | 71°F | 59°F | 2.2" |
| April | 56°F | 77°F | 66°F | 3.4" |
| May | 64°F | 84°F | 73°F | 3.1" |
| June | 72°F | 93°F | 82°F | 1.7" |
| July | 75°F | 96°F | 84°F | 1.0" |
| August | 75°F | 97°F | 85°F | 1.3" |
| September | 69°F | 90°F | 78°F | 1.0" |
| October | 57°F | 80°F | 67°F | 2.4" |
| November | 48°F | 69°F | 57°F | 2.2" |
| December | 39°F | 59°F | 47°F | 2.9" |
| Index | Joshua | Texas | National |
| Air quality index | 33 | 52 | 42 |
| Pollution index | 453,692 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 329 |
| Days with moderate air quality | 33 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.005% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cresson, TX | 993 | 33 | 34.0% |
| Cross Timber, TX | 288 | 33 | 34.0% |
| Cleburne, TX | 30,812 | 33 | 34.0% |
| Edgecliff Village, TX | 3,007 | 33 | 34.0% |
| Alvarado, TX | 4,282 | 33 | 34.0% |
| Joshua, TX | 7,818 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Les Cèdres, QC | 7,818 | n/a | |
| Coteau-du-Lac, QC | 7,818 | n/a | |
| Ashland, VA | 7,819 | 44 | 12.0% |
| Comox Valley A, BC | 7,820 | n/a | |
| Quincy, WA | 7,815 | 24 | 52.0% |
| Joshua, TX | 7,818 | 33 | 34.0% |
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