TABLE 1—
Descriptive Statistics for Warm-Season Meteorological and Atmospheric Conditions: Boston, MA, 2010–2014
| Mean (SD) | Range | |
| Daily maximum temperature, °F | 76.15 (10.45) | 50–103 |
| Daily minimum temperature, °F | 61.18 (8.04) | 36–81 |
| Daily mean temperature, °F | 68.86 (8.87) | 47–92 |
| Daily mean heat index, °Fa | 80.65 (8.27) | 68–116 |
| Ozone, ppm | 0.03 (0.01) | 0.05–0.08 |
| PM2.5, µg/m3 | 8.66 (4.49) | 0.1–28.0 |
Note. PM2.5 = particulate matter ≤ 2.5 microns; ppm = parts per million. Data are from measurements taken at Boston Logan International Airport and the US Environmental Protection Agency’s Air Quality System for Station 25–025-0042. Warm season was defined as May through September.
a
Calculated only for days when the temperature (> 80°F) and relative humidity (> 40%) were within the bounds of the National Weather Service heat index calculation.