| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 33°F | 26°F | 2.7" |
| February | 18°F | 33°F | 25°F | 2.4" |
| March | 26°F | 44°F | 34°F | 2.5" |
| April | 36°F | 58°F | 46°F | 3.7" |
| May | 47°F | 70°F | 58°F | 2.9" |
| June | 58°F | 79°F | 68°F | 3.8" |
| July | 62°F | 83°F | 72°F | 4.1" |
| August | 61°F | 81°F | 71°F | 3.2" |
| September | 54°F | 75°F | 64°F | 3.5" |
| October | 44°F | 62°F | 52°F | 4.2" |
| November | 33°F | 50°F | 41°F | 2.7" |
| December | 25°F | 38°F | 32°F | 3.1" |
| Index | Olcott | New York | National |
| Air quality index | 39 | 43 | 42 |
| Pollution index | 1,117,680 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 308 |
| Days with moderate air quality | 57 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Sanborn, NY | 1,157 | 39 | 22.0% |
| Newfane, NY | 3,240 | 39 | 22.0% |
| South Lockport, NY | 8,344 | 39 | 22.0% |
| Ransomville, NY | 1,520 | 39 | 22.0% |
| Gasport, NY | 1,587 | 39 | 22.0% |
| Olcott, NY | 1,155 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Shafer, MN | 1,155 | 46 | 8.0% |
| North Haverhill, NH | 1,155 | 34 | 32.0% |
| Tyndall, SD | 1,155 | 36 | 28.0% |
| Notre-Dame-du-Portage, QC | 1,155 | n/a | |
| Naco, AZ | 1,156 | 45 | 10.0% |
| Olcott, NY | 1,155 | 39 | 22.0% |
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