Climate Change Chart of Siargao, Philippines

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.88 °C compared with the earlier reference period. This is an unweighted average of the monthly means, not a day-weighted annual average, and it describes the overall difference between the periods rather than a continuous change or the temperature in every month. The largest monthly increase in mean temperature was in September, with a difference of +1.11 °C. This identifies the strongest increase among the reported monthly differences; monthly means do not represent daytime maximum temperatures.

Changes in rainfall

Across calendar months, mean daily rainfall had an average difference of +0.77 mm/day, an unweighted summary of monthly means rather than a day-weighted annual figure. It describes the aggregate comparison between periods and does not imply that rainfall increased in every month. The largest monthly increase in mean daily rainfall occurred in January, with a difference of +7.27 mm/day. In contrast, September had the largest monthly decrease, a difference of -2.83 mm/day. These are daily mean amounts, not monthly rainfall totals, and show that the direction of the difference varied by month.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration shows a difference of -0.46 hours/day compared with the earlier period. This unweighted average summarizes the monthly means; it is not a day-weighted annual average and does not mean that sunshine declined in every month. The largest monthly decrease in mean daily sunshine was shared by January / July, with a difference of -1.00 hours/day. The largest increase was in May, at a difference of +0.17 hours/day, illustrating that monthly differences did not all move in the same direction.