Climate Change Chart of Oranjestad, Aruba

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.22 °C compared with the earlier reference period. This is an unweighted average of the calendar-month means, not a day-weighted annual average, and monthly means describe average conditions rather than daytime maximum temperatures. The largest monthly increase occurred in September, with a difference of +1.54 °C; that identifies the strongest increase among the supplied monthly changes, not a continuous trend.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of -0.59 mm/day, indicating lower average amounts in the more recent period. This is an unweighted average of monthly means, not a day-weighted annual figure, and the measure is a daily mean rather than a monthly total. The largest monthly decrease was in October, where the difference was -1.76 mm/day. By contrast, March had the largest monthly increase, with a difference of +0.26 mm/day; this local increase sits alongside the lower overall average across calendar months.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration was unchanged at the displayed precision, with a difference of 0.00 hours/day. This is an unweighted average of monthly means; the rounded result does not establish that every month was unchanged. Monthly differences varied: May recorded the largest increase, with a difference of +0.35 hours/day, while March / October shared the largest decrease, with a difference of -0.14 hours/day. These are changes in mean daily sunshine hours, not statements about every individual day.