20 T.A. Cinco et al. / Atmospheric Research 145–146 (2014) 12–26 Fig. 6. Trends in the frequency of days with maximum temperature in the Philippines (1951–2010) above the 1961–1990 mean 99th percentile (hot days). Fig. 7 shows the trend in the mean number of daily rainfall events which exceed the 99th percentile of rainfall intensity, whilst Fig. 8 shows the trend in the frequency of daily rainfall in excess of the 99th percentile. Again, in each figure an increase is represented by a (+) sign, a significant increase with a (▲) symbol; decreases are shown using a (−) symbol and significant decreases with a (▼) symbol. Table 3 below provides a detailed summary of the data used in the maps including the frequency, significance at the 5% level (p), direction and magnitude of the trend at each synoptic station. Figures highlighted in grey are those showing high significance at the 95% confidence level and show an overall low level of statistically significant results. The results of this analysis show that although the period 1951 to 2010 has seen increases in both the frequency and intensity of extreme daily rainfall events at most stations throughout the Philippines, unlike temperature extremes, the majority do not show a high level of statistical significance at the 95% confidence level. Six of the 30 stations showed significantly increasing trends in the intensity of extreme rainfall events. Stations from Laoag, in the far north of the Philippines to Cotabato in the far south exhibited a significant increase in rainfall intensity and there is no identifiable spatial pattern to the distribution of rainfall intensity within the country. The influence of elevation appears also to be minimal with the