| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 42°F | 58°F | 50°F | 3.5" |
| February | 46°F | 61°F | 53°F | 3.3" |
| March | 46°F | 64°F | 54°F | 2.6" |
| April | 48°F | 66°F | 56°F | 1.8" |
| May | 52°F | 69°F | 59°F | 0.6" |
| June | 56°F | 73°F | 62°F | 0.1" |
| July | 57°F | 75°F | 64°F | 0.0" |
| August | 58°F | 76°F | 64°F | 0.0" |
| September | 57°F | 76°F | 64°F | 0.2" |
| October | 53°F | 72°F | 61°F | 1.4" |
| November | 48°F | 66°F | 56°F | 1.3" |
| December | 42°F | 58°F | 49°F | 3.2" |
| Index | Grimmer | Fremont | California |
| Air quality index | 43 | 43 | 55 |
| Pollution index | 23,499,800 | 6,427,290 | 10,473,190 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 263 |
| Days with moderate air quality | 98 |
| Days w/ poor A.Q. for sensitive groups | 4 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.110% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.010% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Ashland, CA | 23,566 | 40 | 20.0% |
| Castro Valley, CA | 64,392 | 40 | 20.0% |
| San Leandro, CA | 90,489 | 40 | 20.0% |
| San Lorenzo, CA | 30,117 | 40 | 20.0% |
| Fairview, CA | 10,834 | 43 | 14.0% |
| Fremont, CA | 234,829 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Hialeah, FL | 233,876 | 41 | 18.0% |
| Arlington, VA | 236,434 | 47 | 6.0% |
| Garland, TX | 238,622 | 51 | 2.0% |
| Windsor, ON | 230,583 | n/a | |
| Richmond, VA | 229,233 | 44 | 12.0% |
| Fremont, CA | 234,829 | 43 | 14.0% |
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