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Table 2 Description of the population and daily maximum daytime temperature (Tmax) and daily minimum nighttime temperature (Tmin) in the seven Swiss regions during summer months (June–August) in 2012–2014 and in 2015

From: Impact of the warm summer 2015 on emergency hospital admissions in Switzerland

Region (Cantons) Populationa (%) Station Elevation (m) Tmax (°C)
Mean (range)
Number of days with Tmax ≥30 °C Tmin (°C)
Mean (range)
Number of days with Tmin ≥20 °C
2012–2014 2015 2012–2014b 2015 2012–2014 2015 2012–2014b 2015
Northwestern Switzerland (Cantons AG, BL, BS) 1 122 808 (13.6%) Basel-Binningen 316 24.6 (12.5–37.3) 26.7 (16.6–37.0) 11 28 14.5 (5.0–20.9) 15.7 (8.4–22.3) 2 11
Espace Mittelland (Canton BE, FR, JU, NE, SO) 1 831 565 (22.1%) Bern-Zollikofen 553 23.4 (12.0–34.1) 25.9 (16.5–36.8) 8 26 12.8 (4.0–19.6) 14.2 (6.7–20.0) 0 1
Lake Geneva (Cantons GE, VD, VS) 1 581 953 (19.1%) Genève-Cointrin 412 25.1 (14.1–34.5) 28.1 (18.4–39.7) 11 34 14.2 (7.0–21.3) 15.7 (8.7–22.5) 1 7
Zurich (ZH) 1 456 217 (17.6%) Zurich-Fluntern 556 23.1 (11.2–35.1) 25.8 (14.4–34.6) 7 26 14.0 (4.4–22.4) 15.6 (7.9–21.5) 2 11
Ticino (TI) 351 131 (4.2%) Lugano 273 26.4 (16.9–33.4) 27.8 (19.3–33.9) 12 27 17.7 (10.9–24.3) 19.0 (13.1–25.4) 20 31
Central Switzerland (Cantons LU, NW, OW, SZ, UR, ZG) 786 362 (9.5%) Luzern 454 23.8 (12.2–34.9) 26.1 (15.1–34.8) 10 26 14.2 (6.9–21.7) 15.8 (8.8–21.5) 1 7
Eastern Switzerland (Cantons AI, AR, GL, GR, SH, SG, TG) 1 148 946 (13.9%) St. Gallen 776 20.6 (9.9–33.3) 22.8 (12.3–31.7) 1 5 13.3 (3.0–21.8) 15.1 (7.8–22.6) 3 11
  1. aTotal population at mid-year 2015
  2. bMean of number of days in 2012, 2013 and 2014
  3. Cantons: AG Aargau, AI Appenzell I. Rh., AR Appenzell A. Rh., BE Bern, BL Basel-Landschaft, BS Basel-Stadt, FR Fribourg, GE Geneva, GL Glarus, GR Graubünden, JU Jura, LU Lucerne, NE Neuchâtel, NW Nidwalden, OW Obwalden, SG St. Gallen, SH Schaffhausen, SO Solothurn, SZ Schwyz, TG Thurgau, TI Ticino, UR Uri, VD Vaud, VS Valais, ZG Zug