| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 46°F | 72°F | 58°F | 1.2" |
| February | 50°F | 75°F | 61°F | 4.0" |
| March | 57°F | 85°F | 69°F | 1.6" |
| April | 65°F | 92°F | 77°F | 11.0" |
| May | 71°F | 95°F | 82°F | 5.0" |
| June | 75°F | 100°F | 86°F | 3.5" |
| July | 76°F | 99°F | 87°F | 7.2" |
| August | 76°F | 100°F | 87°F | 12.0" |
| September | 72°F | 94°F | 82°F | 7.8" |
| October | 63°F | 88°F | 75°F | 4.1" |
| November | 54°F | 81°F | 66°F | 1.2" |
| December | 48°F | 70°F | 57°F | 4.5" |
| Index | Jardin de San Julian | Texas | National |
| Air quality index | 42 | 52 | 42 |
| Pollution index | 2,768,160 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 243 |
| Days with moderate air quality | 120 |
| 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 | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Lopeño, TX | 191 | 41 | 18.0% |
| Moraida, TX | 0 | 42 | 16.0% |
| Roma, TX | 11,427 | 42 | 16.0% |
| Los Arrieros, TX | 0 | 42 | 16.0% |
| New Falcon, TX | 144 | 42 | 16.0% |
| Jardin de San Julian, TX | 0 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Chase, AK | 0 | 31 | 38.0% |
| Chiniak, AK | 0 | 31 | 38.0% |
| Chisana, AK | 0 | 31 | 38.0% |
| Dot Lake, AK | 0 | 38 | 24.0% |
| Eureka Roadhouse, AK | 0 | 31 | 38.0% |
| Jardin de San Julian, TX | 0 | 42 | 16.0% |
Here are the best places to live in Texas
These are the 10 most affordable cities in Texas
Check out the 10 safest cities in Texas
See the best places to live in & around Jardin de San Julian