Climate Change Chart of Port Louis, Mauritius

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.04 °C compared with the earlier reference period; this is an unweighted average of monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in October, with a difference of +1.42 °C in the monthly mean. That identifies the strongest increase among the reported months, rather than a change that necessarily applied in every month.

Changes in rainfall

Averaged across calendar months, mean daily rainfall shows a difference of -0.95 mm/day compared with the earlier reference period. This unweighted mean summarizes monthly means; it is not an annual rainfall total, and the daily measure should not be read as a monthly accumulation. The largest monthly decrease in mean daily rainfall occurred in April, with a difference of -2.39 mm/day. By contrast, December had the largest monthly increase, at +0.15 mm/day; these extrema show that the monthly differences were not uniform in direction.

Changes in sunshine duration

Averaged across calendar months, mean daily sunshine duration shows a difference of -0.14 hours/day. This is an unweighted comparison of monthly means, not a day-weighted annual average, and describes the aggregate rather than the difference in every individual month. The largest monthly decrease in mean daily sunshine was in January, with a difference of -0.69 hours/day. The largest monthly increase occurred in April, at +0.18 hours/day, illustrating that the month-specific differences did not all move in the same direction.