Table 2 Meteorological factors between February and May (1999-2008)
From: Impact of meteorological variation on hospital visits of patients with tree pollen allergy
|  | Average temperature (°C) | Maximum temperature (°C) | Minimum temperature (°C) | Relative humidity (%) | Precipitation (mm) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Â | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD |
February | 0.1 | 1.7 | 5.2 | 2.1 | -4.6 | 1.7 | 58.6 | 6.5 | 0.6 | 0.5 |
March | 5.6 | 0.7 | 11.1 | 0.9 | 0.5 | 0.7 | 58.9 | 7.0 | 1.2 | 1.3 |
April | 12.2 | 0.7 | 18.1 | 1.1 | 6.8 | 0.5 | 59.0 | 4.9 | 2.6 | 1.8 |
May | 17.4 | 0.7 | 23.1 | 0.7 | 12.4 | 0.6 | 64.8 | 4.8 | 3.2 | 1.0 |