| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 38°F | 58°F | 47°F | 3.5" |
| February | 42°F | 62°F | 51°F | 3.9" |
| March | 45°F | 67°F | 56°F | 3.7" |
| April | 48°F | 74°F | 60°F | 2.1" |
| May | 55°F | 84°F | 69°F | 0.7" |
| June | 61°F | 92°F | 76°F | 0.3" |
| July | 65°F | 98°F | 81°F | 0.0" |
| August | 63°F | 95°F | 79°F | 0.0" |
| September | 59°F | 90°F | 74°F | 0.2" |
| October | 51°F | 79°F | 64°F | 1.2" |
| November | 44°F | 65°F | 54°F | 2.6" |
| December | 38°F | 57°F | 47°F | 4.1" |
| Index | Biggs | California | National |
| Air quality index | 44 | 55 | 42 |
| Pollution index | 2,024,690 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 239 |
| Days with moderate air quality | 124 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Gridley, CA | 7,154 | 44 | 12.0% |
| Honcut, CA | 172 | 44 | 12.0% |
| Palermo, CA | 5,204 | 44 | 12.0% |
| Durham, CA | 6,255 | 46 | 8.0% |
| Oroville, CA | 19,659 | 46 | 8.0% |
| Biggs, CA | 2,648 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Hamburg, AR | 2,647 | 35 | 30.0% |
| Green Island, NY | 2,647 | 37 | 26.0% |
| Freer, TX | 2,647 | 30 | 40.0% |
| Holyrood, NL | 2,647 | n/a | |
| Mission Canyon, CA | 2,649 | 44 | 12.0% |
| Biggs, CA | 2,648 | 44 | 12.0% |
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