| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 42°F | 69°F | 55°F | 0.6" |
| February | 46°F | 74°F | 60°F | 0.6" |
| March | 51°F | 82°F | 67°F | 0.3" |
| April | 57°F | 89°F | 73°F | 0.0" |
| May | 64°F | 97°F | 81°F | 0.1" |
| June | 74°F | 107°F | 92°F | 0.0" |
| July | 82°F | 110°F | 96°F | 0.4" |
| August | 81°F | 109°F | 95°F | 0.5" |
| September | 73°F | 103°F | 88°F | 0.2" |
| October | 61°F | 91°F | 76°F | 0.2" |
| November | 50°F | 79°F | 64°F | 0.1" |
| December | 41°F | 68°F | 54°F | 0.6" |
| Index | Blythe | California | National |
| Air quality index | 13 | 55 | 42 |
| Pollution index | 2,561,410 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 357 |
| Days with moderate air quality | 7 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.090% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Ehrenberg, AZ | 1,005 | 13 | 74.0% |
| Mesa Verde, CA | 753 | 13 | 74.0% |
| Ripley, CA | 460 | 45 | 10.0% |
| Palo Verde, CA | 78 | 45 | 10.0% |
| Blythe, CA | 19,747 | 13 | 74.0% |
| City | Population | Air Quality Index | National Avg. |
| Sherwood, OR | 19,745 | 38 | 24.0% |
| Mont-Saint-Hilaire, QC | 19,745 | n/a | |
| Shafter, CA | 19,743 | 67 | 34.0% |
| West Mifflin, PA | 19,742 | 56 | 12.0% |
| Niskayuna, NY | 19,741 | 37 | 26.0% |
| Blythe, CA | 19,747 | 13 | 74.0% |
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