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Table 1 Mean (standard deviation) in °C of daily maximum (TMX), mean (AVG) and minimum (TMN) temperature during May to October by study city for four exposure metrics: airport observations, simple average of Daymet 1 km data, and Daymet population-weighted averages (PWA) using county or ZIP code population

From: Time-series analysis of daily ambient temperature and emergency department visits in five US cities with a comparison of exposure metrics derived from 1-km meteorology products

City Exposure Airport Obs. Daymet Average Daymet County PWA Daymet ZCTA PWA
Atlanta TMX 28.2 (4.6) 28.6 (4.4) 28.6 (4.3) 28.7 (4.4)
AVG 22.5 (4.3) 22.8 (4.4) 22.6 (4.3) 23.4 (4.4)
TMN 16.6 (4.8) 18.6 (4.6) 16.6 (4.8) 16.5 (4.8)
Los Angeles TMX 23.1 (3.3) 27.5 (4.1) 28.0 (4.3) 24.6 (3.5)
AVG 21.7 (3.5) 20.5 (2.7) 21.7 (3.8) 19.9 (2.5)
TMN 15.1 (3.3) 16.6 (2.2) 16.0 (2.6) 15.4 (3.1)
Phoenix TMX 37.9 (4.9) 37.3 (4.7) 36.0 (4.5) 37.8 (4.7)
AVG 28.1 (4.6) 30.1 (4.7) 28.7 (4.6) 31.5 (4.7)
TMN 21.0 (5.0) 25.0 (4.9) 22.1 (5.0) 20.3 (4.9)
Salt Lake City TMX 27.5 (7.4) 25.5 (6.8) 23.1 (6.6) 27.4 (7.1)
AVG 15.8 (5.8) 20.3 (6.3) 17.5 (6.0) 20.5 (6.6)
TMN 10.8 (5.5) 13.5 (6.2) 11.9 (5.6) 8.5 (5.3)
San Francisco TMX 21.7 (3.7) 23.4 (3.8) 23.9 (3.9) 21.1 (3.3)
AVG 18.0 (2.8) 16.6 (2.2) 18.5 (3.0) 17.2 (2.5)
TMN 12.4 (2.2) 12.8 (1.9) 12.3 (2.0) 12.0 (2.1)