| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 38°F | 59°F | 47°F | 2.0" |
| February | 42°F | 65°F | 52°F | 1.7" |
| March | 46°F | 71°F | 58°F | 1.6" |
| April | 49°F | 77°F | 62°F | 1.4" |
| May | 56°F | 86°F | 71°F | 0.3" |
| June | 62°F | 95°F | 79°F | 0.2" |
| July | 69°F | 101°F | 85°F | 0.0" |
| August | 67°F | 100°F | 83°F | 0.0" |
| September | 62°F | 94°F | 77°F | 0.1" |
| October | 54°F | 82°F | 67°F | 0.4" |
| November | 45°F | 69°F | 55°F | 0.9" |
| December | 38°F | 59°F | 47°F | 2.0" |
| Index | Sunnyside | California | National |
| Air quality index | 60 | 55 | 42 |
| Pollution index | 16,639,200 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 139 |
| Days with moderate air quality | 160 |
| Days w/ poor A.Q. for sensitive groups | 64 |
| Days with unhealthy air quality | 2 |
| Pollutant | Total |
| Arsenic | 0.210% |
| Benzene | 0.250% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.180% |
| Mercury | 0.230% |
| City | Population | Air Quality Index | National Avg. |
| Kingsburg, CA | 12,116 | 56 | 12.0% |
| Selma, CA | 24,405 | 56 | 12.0% |
| Mayfair, CA | 4,878 | 60 | 20.0% |
| Caruthers, CA | 2,245 | 60 | 20.0% |
| Raisin City, CA | 377 | 60 | 20.0% |
| Sunnyside, CA | 4,557 | 60 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Luverne, MN | 4,557 | 36 | 28.0% |
| Belfair, WA | 4,557 | 18 | 64.0% |
| Vilonia, AR | 4,556 | 45 | 10.0% |
| Kings Park, VA | 4,556 | 47 | 6.0% |
| Castle Pines Village, CO | 4,558 | 58 | 16.0% |
| Sunnyside, CA | 4,557 | 60 | 20.0% |
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