Climate Change Chart of Port au Prince, Haiti

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.44 °C in the more recent period compared with the earlier reference period; this is an unweighted mean of the monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in July, with a difference of +2.01 °C. That identifies the strongest increase among the supplied monthly comparisons, rather than implying that every month warmed by the same amount.

Changes in rainfall

Averaged across calendar months, mean daily rainfall shows a difference of -0.48 mm/day in the more recent period; this is an unweighted average of monthly means, not a day-weighted annual rainfall total. The monthly pattern was not uniform: the largest decrease was in June, with a difference of -1.71 mm/day, while the largest increase was in November, with a difference of +0.81 mm/day. These figures describe differences in mean daily rainfall for those months, not changes in monthly totals.

Changes in sunshine duration

Across calendar months, the unweighted mean difference in daily sunshine duration was -0.06 hours/day; this summarizes monthly means and should not be read as a day-weighted annual average. The largest monthly increase in mean daily sunshine was in June, with a difference of +0.31 hours/day. By contrast, the largest decrease was in November, with a difference of -0.24 hours/day, showing that the monthly differences varied in direction.